diff options
| author | bouyer <bouyer@pkgsrc.org> | 2018-01-24 23:29:32 +0000 |
|---|---|---|
| committer | bouyer <bouyer@pkgsrc.org> | 2018-01-24 23:29:32 +0000 |
| commit | 78d049661c95c751a8eb0c99f26b5e3c856541a2 (patch) | |
| tree | 8e6935dbe6888a512ba0fade6387d663ff707758 /sysutils | |
| parent | 72ebd87a97bd54bf5ca1840395c03bc59fffd1b5 (diff) | |
| download | pkgsrc-78d049661c95c751a8eb0c99f26b5e3c856541a2.tar.gz | |
Update xen 4.8 packages to 4.8.3. Changes since 4.8.2: include patches from
all security advisory up to and including XSA254.
While there pass XEN_VENDORVERSION=nb${PKGREVISION} to make so that
'xl info' shows the NetBSD PKGREVISION. If PKGREVISION is not available,
define this as 'nb0'.
Diffstat (limited to 'sysutils')
27 files changed, 19 insertions, 3864 deletions
diff --git a/sysutils/xenkernel48/Makefile b/sysutils/xenkernel48/Makefile index 71294c57411..22e28c9155e 100644 --- a/sysutils/xenkernel48/Makefile +++ b/sysutils/xenkernel48/Makefile @@ -1,9 +1,8 @@ -# $NetBSD: Makefile,v 1.11 2018/01/18 10:28:13 bouyer Exp $ +# $NetBSD: Makefile,v 1.12 2018/01/24 23:29:32 bouyer Exp $ -VERSION= 4.8.2 +VERSION= 4.8.3 DISTNAME= xen-${VERSION} PKGNAME= xenkernel48-${VERSION} -PKGREVISION= 3 CATEGORIES= sysutils MASTER_SITES= https://downloads.xenproject.org/release/xen/${VERSION}/ DIST_SUBDIR= xen48 @@ -26,6 +25,11 @@ PYTHON_FOR_BUILD_ONLY= YES PYTHON_VERSIONS_INCOMPATIBLE= 34 35 36 MAKE_ENV+= OCAML_TOOLS=no +.if defined(PKGREVISION) && !empty(PKGREVISION) && (${PKGREVISION} != "0") +MAKE_ENV+= XEN_VENDORVERSION=nb${PKGREVISION} +.else +MAKE_ENV+= XEN_VENDORVERSION=nb0 +.endif INSTALLATION_DIRS= xen48-kernel XENKERNELDIR= ${PREFIX}/${INSTALLATION_DIRS} diff --git a/sysutils/xenkernel48/distinfo b/sysutils/xenkernel48/distinfo index df11b75c684..cda4b4566a8 100644 --- a/sysutils/xenkernel48/distinfo +++ b/sysutils/xenkernel48/distinfo @@ -1,31 +1,10 @@ -$NetBSD: distinfo,v 1.5 2018/01/18 10:28:13 bouyer Exp $ +$NetBSD: distinfo,v 1.6 2018/01/24 23:29:32 bouyer Exp $ -SHA1 (xen48/xen-4.8.2.tar.gz) = 184c57ce9e71e34b3cbdd318524021f44946efbe -RMD160 (xen48/xen-4.8.2.tar.gz) = f4126cb0f7ff427ed7d20ce399dcd1077c599343 -SHA512 (xen48/xen-4.8.2.tar.gz) = 7805531f73d23ecfff3439770e62d387f4254a444875670d53a0a739323e5d4d8f8fcc478f8936ee1ae8aff3e0229549e47c01c606365a8ce060dd5c503e87da -Size (xen48/xen-4.8.2.tar.gz) = 22522336 bytes +SHA1 (xen48/xen-4.8.3.tar.gz) = ee55e8dc1e79d16d2f85fbe1f8bbd27a2db8422f +RMD160 (xen48/xen-4.8.3.tar.gz) = 54b7ba828d8198c2a4629eabf7acfba2e9c6561c +SHA512 (xen48/xen-4.8.3.tar.gz) = 584d8ee6e432e291a70e8f727da6d0a71afff7509fbf2e32eeb9cfe58b8279a80770c2c5f7759dcb5c0b08ed4644039e770e280ab534673215753d598f3f6508 +Size (xen48/xen-4.8.3.tar.gz) = 22529092 bytes SHA1 (patch-Config.mk) = abf55aa58792315e758ee3785a763cfa8c2da68f -SHA1 (patch-XSA231) = fc249a68ea53064ff7d95f24380f66f3fc3393e7 -SHA1 (patch-XSA232) = 86d633941ac3165ca4034db660a48d60384ea252 -SHA1 (patch-XSA234) = acf4170a410d9f314c0cc0c5c092db6bb6cc69a0 -SHA1 (patch-XSA237) = 3125554b155bd650480934a37d89d1a7471dfb20 -SHA1 (patch-XSA238) = 58b6fcb73d314d7f06256ed3769210e49197aa90 -SHA1 (patch-XSA239) = 10619718e8a1536a7f52eb3838cdb490e6ba8c97 -SHA1 (patch-XSA240) = 77b398914ca79da6cd6abf34674d5476b6d3bcba -SHA1 (patch-XSA241) = 351395135fcd30b7ba35e84a64bf6348214d4fa6 -SHA1 (patch-XSA242) = 77e224f927818adb77b8ef10329fd886ece62835 -SHA1 (patch-XSA243) = 75eef49628bc0b3bd4fe8b023cb2da75928103a7 -SHA1 (patch-XSA244) = 2739ff8a920630088853a9076f71ca2caf639320 -SHA1 (patch-XSA246) = b48433ee2213340d1bd3c810ea3e5c6de7890fd7 -SHA1 (patch-XSA247) = b92c4a7528ebd121ba2700610589df6fff40cbbf -SHA1 (patch-XSA248) = d5787fa7fc48449ca90200811b66cb6278c750aa -SHA1 (patch-XSA249) = 7037a35f37eb866f16fe90482e66d0eca95944c4 -SHA1 (patch-XSA250) = 25ab2e8c67ebe2b40cf073197c17f1625f5581f6 -SHA1 (patch-XSA251) = dc0786c85bcfbdd3f7a1c97a3af32c10deea8276 -SHA1 (patch-XSA254-1) = a2e1573bebd2f5e873da85d1f29a6cb5cfa2fb31 -SHA1 (patch-XSA254-2) = fddc172293fcd8cfbaaf61155bb16738fb6fdcf5 -SHA1 (patch-XSA254-3) = eaded260831b8146c7943ed5c9138d8bde256213 -SHA1 (patch-XSA254-4) = 9766e14d3e48d41d8bce969f07c9f3a7b22d9120 SHA1 (patch-xen_Makefile) = be3f4577a205b23187b91319f91c50720919f70b SHA1 (patch-xen_Rules.mk) = 5f33a667bae67c85d997a968c0f8b014b707d13c SHA1 (patch-xen_arch_x86_Rules.mk) = e2d148fb308c37c047ca41a678471217b6166977 diff --git a/sysutils/xenkernel48/patches/patch-XSA231 b/sysutils/xenkernel48/patches/patch-XSA231 deleted file mode 100644 index 0e750604b70..00000000000 --- a/sysutils/xenkernel48/patches/patch-XSA231 +++ /dev/null @@ -1,110 +0,0 @@ -$NetBSD: patch-XSA231,v 1.1 2017/10/17 08:42:30 bouyer Exp $ - -From: George Dunlap <george.dunlap@citrix.com> -Subject: xen/mm: make sure node is less than MAX_NUMNODES - -The output of MEMF_get_node(memflags) can be as large as nodeid_t can -hold (currently 255). This is then used as an index to arrays of size -MAX_NUMNODE, which is 64 on x86 and 1 on ARM, can be passed in by an -untrusted guest (via memory_exchange and increase_reservation) and is -not currently bounds-checked. - -Check the value in page_alloc.c before using it, and also check the -value in the hypercall call sites and return -EINVAL if appropriate. -Don't permit domains other than the hardware or control domain to -allocate node-constrained memory. - -This is XSA-231. - -Reported-by: Matthew Daley <mattd@bugfuzz.com> -Signed-off-by: George Dunlap <george.dunlap@citrix.com> -Signed-off-by: Jan Beulich <jbeulich@suse.com> -Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com> - ---- xen/common/memory.c.orig -+++ xen/common/memory.c -@@ -411,6 +411,31 @@ static void decrease_reservation(struct - a->nr_done = i; - } - -+static bool propagate_node(unsigned int xmf, unsigned int *memflags) -+{ -+ const struct domain *currd = current->domain; -+ -+ BUILD_BUG_ON(XENMEMF_get_node(0) != NUMA_NO_NODE); -+ BUILD_BUG_ON(MEMF_get_node(0) != NUMA_NO_NODE); -+ -+ if ( XENMEMF_get_node(xmf) == NUMA_NO_NODE ) -+ return true; -+ -+ if ( is_hardware_domain(currd) || is_control_domain(currd) ) -+ { -+ if ( XENMEMF_get_node(xmf) >= MAX_NUMNODES ) -+ return false; -+ -+ *memflags |= MEMF_node(XENMEMF_get_node(xmf)); -+ if ( xmf & XENMEMF_exact_node_request ) -+ *memflags |= MEMF_exact_node; -+ } -+ else if ( xmf & XENMEMF_exact_node_request ) -+ return false; -+ -+ return true; -+} -+ - static long memory_exchange(XEN_GUEST_HANDLE_PARAM(xen_memory_exchange_t) arg) - { - struct xen_memory_exchange exch; -@@ -483,6 +508,12 @@ static long memory_exchange(XEN_GUEST_HA - } - } - -+ if ( unlikely(!propagate_node(exch.out.mem_flags, &memflags)) ) -+ { -+ rc = -EINVAL; -+ goto fail_early; -+ } -+ - d = rcu_lock_domain_by_any_id(exch.in.domid); - if ( d == NULL ) - { -@@ -501,7 +532,6 @@ static long memory_exchange(XEN_GUEST_HA - d, - XENMEMF_get_address_bits(exch.out.mem_flags) ? : - (BITS_PER_LONG+PAGE_SHIFT))); -- memflags |= MEMF_node(XENMEMF_get_node(exch.out.mem_flags)); - - for ( i = (exch.nr_exchanged >> in_chunk_order); - i < (exch.in.nr_extents >> in_chunk_order); -@@ -864,12 +894,8 @@ static int construct_memop_from_reservat - } - read_unlock(&d->vnuma_rwlock); - } -- else -- { -- a->memflags |= MEMF_node(XENMEMF_get_node(r->mem_flags)); -- if ( r->mem_flags & XENMEMF_exact_node_request ) -- a->memflags |= MEMF_exact_node; -- } -+ else if ( unlikely(!propagate_node(r->mem_flags, &a->memflags)) ) -+ return -EINVAL; - - return 0; - } ---- xen/common/page_alloc.c.orig -+++ xen/common/page_alloc.c -@@ -706,9 +706,13 @@ static struct page_info *alloc_heap_page - if ( node >= MAX_NUMNODES ) - node = cpu_to_node(smp_processor_id()); - } -+ else if ( unlikely(node >= MAX_NUMNODES) ) -+ { -+ ASSERT_UNREACHABLE(); -+ return NULL; -+ } - first_node = node; - -- ASSERT(node < MAX_NUMNODES); - ASSERT(zone_lo <= zone_hi); - ASSERT(zone_hi < NR_ZONES); - diff --git a/sysutils/xenkernel48/patches/patch-XSA232 b/sysutils/xenkernel48/patches/patch-XSA232 deleted file mode 100644 index 91a7e8492f9..00000000000 --- a/sysutils/xenkernel48/patches/patch-XSA232 +++ /dev/null @@ -1,25 +0,0 @@ -$NetBSD: patch-XSA232,v 1.1 2017/10/17 08:42:30 bouyer Exp $ - -From: Andrew Cooper <andrew.cooper3@citrix.com> -Subject: grant_table: fix GNTTABOP_cache_flush handling - -Don't fall over a NULL grant_table pointer when the owner of the domain -is a system domain (DOMID_{XEN,IO} etc). - -This is XSA-232. - -Reported-by: Matthew Daley <mattd@bugfuzz.com> -Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com> -Reviewed-by: Jan Beulich <jbeulich@suse.com> - ---- xen/common/grant_table.c.orig -+++ xen/common/grant_table.c -@@ -3053,7 +3053,7 @@ static int cache_flush(gnttab_cache_flus - - page = mfn_to_page(mfn); - owner = page_get_owner_and_reference(page); -- if ( !owner ) -+ if ( !owner || !owner->grant_table ) - { - rcu_unlock_domain(d); - return -EPERM; diff --git a/sysutils/xenkernel48/patches/patch-XSA234 b/sysutils/xenkernel48/patches/patch-XSA234 deleted file mode 100644 index 557c6a8f447..00000000000 --- a/sysutils/xenkernel48/patches/patch-XSA234 +++ /dev/null @@ -1,187 +0,0 @@ -$NetBSD: patch-XSA234,v 1.1 2017/10/17 08:42:30 bouyer Exp $ - -From: Jan Beulich <jbeulich@suse.com> -Subject: gnttab: also validate PTE permissions upon destroy/replace - -In order for PTE handling to match up with the reference counting done -by common code, presence and writability of grant mapping PTEs must -also be taken into account; validating just the frame number is not -enough. This is in particular relevant if a guest fiddles with grant -PTEs via non-grant hypercalls. - -Note that the flags being passed to replace_grant_host_mapping() -already happen to be those of the existing mapping, so no new function -parameter is needed. - -This is XSA-234. - -Reported-by: Andrew Cooper <andrew.cooper3@citrix.com> -Signed-off-by: Jan Beulich <jbeulich@suse.com> -Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com> - ---- xen/arch/x86/mm.c.orig -+++ xen/arch/x86/mm.c -@@ -4017,7 +4017,8 @@ static int create_grant_pte_mapping( - } - - static int destroy_grant_pte_mapping( -- uint64_t addr, unsigned long frame, struct domain *d) -+ uint64_t addr, unsigned long frame, unsigned int grant_pte_flags, -+ struct domain *d) - { - int rc = GNTST_okay; - void *va; -@@ -4063,16 +4064,27 @@ static int destroy_grant_pte_mapping( - - ol1e = *(l1_pgentry_t *)va; - -- /* Check that the virtual address supplied is actually mapped to frame. */ -- if ( unlikely(l1e_get_pfn(ol1e) != frame) ) -+ /* -+ * Check that the PTE supplied actually maps frame (with appropriate -+ * permissions). -+ */ -+ if ( unlikely(l1e_get_pfn(ol1e) != frame) || -+ unlikely((l1e_get_flags(ol1e) ^ grant_pte_flags) & -+ (_PAGE_PRESENT | _PAGE_RW)) ) - { - page_unlock(page); -- MEM_LOG("PTE entry %lx for address %"PRIx64" doesn't match frame %lx", -- (unsigned long)l1e_get_intpte(ol1e), addr, frame); -+ MEM_LOG("PTE %"PRIpte" at %"PRIx64" doesn't match grant (%"PRIpte")", -+ l1e_get_intpte(ol1e), addr, -+ l1e_get_intpte(l1e_from_pfn(frame, grant_pte_flags))); - rc = GNTST_general_error; - goto failed; - } - -+ if ( unlikely((l1e_get_flags(ol1e) ^ grant_pte_flags) & -+ ~(_PAGE_AVAIL | PAGE_CACHE_ATTRS)) ) -+ MEM_LOG("PTE flags %x at %"PRIx64" don't match grant (%x)\n", -+ l1e_get_flags(ol1e), addr, grant_pte_flags); -+ - /* Delete pagetable entry. */ - if ( unlikely(!UPDATE_ENTRY - (l1, -@@ -4081,7 +4093,7 @@ static int destroy_grant_pte_mapping( - 0)) ) - { - page_unlock(page); -- MEM_LOG("Cannot delete PTE entry at %p", va); -+ MEM_LOG("Cannot delete PTE entry at %"PRIx64, addr); - rc = GNTST_general_error; - goto failed; - } -@@ -4149,7 +4161,8 @@ static int create_grant_va_mapping( - } - - static int replace_grant_va_mapping( -- unsigned long addr, unsigned long frame, l1_pgentry_t nl1e, struct vcpu *v) -+ unsigned long addr, unsigned long frame, unsigned int grant_pte_flags, -+ l1_pgentry_t nl1e, struct vcpu *v) - { - l1_pgentry_t *pl1e, ol1e; - unsigned long gl1mfn; -@@ -4185,19 +4198,30 @@ static int replace_grant_va_mapping( - - ol1e = *pl1e; - -- /* Check that the virtual address supplied is actually mapped to frame. */ -- if ( unlikely(l1e_get_pfn(ol1e) != frame) ) -- { -- MEM_LOG("PTE entry %lx for address %lx doesn't match frame %lx", -- l1e_get_pfn(ol1e), addr, frame); -+ /* -+ * Check that the virtual address supplied is actually mapped to frame -+ * (with appropriate permissions). -+ */ -+ if ( unlikely(l1e_get_pfn(ol1e) != frame) || -+ unlikely((l1e_get_flags(ol1e) ^ grant_pte_flags) & -+ (_PAGE_PRESENT | _PAGE_RW)) ) -+ { -+ MEM_LOG("PTE %"PRIpte" for %lx doesn't match grant (%"PRIpte")", -+ l1e_get_intpte(ol1e), addr, -+ l1e_get_intpte(l1e_from_pfn(frame, grant_pte_flags))); - rc = GNTST_general_error; - goto unlock_and_out; - } - -+ if ( unlikely((l1e_get_flags(ol1e) ^ grant_pte_flags) & -+ ~(_PAGE_AVAIL | PAGE_CACHE_ATTRS)) ) -+ MEM_LOG("PTE flags %x for %"PRIx64" don't match grant (%x)", -+ l1e_get_flags(ol1e), addr, grant_pte_flags); -+ - /* Delete pagetable entry. */ - if ( unlikely(!UPDATE_ENTRY(l1, pl1e, ol1e, nl1e, gl1mfn, v, 0)) ) - { -- MEM_LOG("Cannot delete PTE entry at %p", (unsigned long *)pl1e); -+ MEM_LOG("Cannot delete PTE entry for %"PRIx64, addr); - rc = GNTST_general_error; - goto unlock_and_out; - } -@@ -4211,9 +4235,11 @@ static int replace_grant_va_mapping( - } - - static int destroy_grant_va_mapping( -- unsigned long addr, unsigned long frame, struct vcpu *v) -+ unsigned long addr, unsigned long frame, unsigned int grant_pte_flags, -+ struct vcpu *v) - { -- return replace_grant_va_mapping(addr, frame, l1e_empty(), v); -+ return replace_grant_va_mapping(addr, frame, grant_pte_flags, -+ l1e_empty(), v); - } - - static int create_grant_p2m_mapping(uint64_t addr, unsigned long frame, -@@ -4307,21 +4333,40 @@ int replace_grant_host_mapping( - unsigned long gl1mfn; - struct page_info *l1pg; - int rc; -+ unsigned int grant_pte_flags; - - if ( paging_mode_external(current->domain) ) - return replace_grant_p2m_mapping(addr, frame, new_addr, flags); - -+ grant_pte_flags = -+ _PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_GNTTAB | _PAGE_NX; -+ -+ if ( flags & GNTMAP_application_map ) -+ grant_pte_flags |= _PAGE_USER; -+ if ( !(flags & GNTMAP_readonly) ) -+ grant_pte_flags |= _PAGE_RW; -+ /* -+ * On top of the explicit settings done by create_grant_host_mapping() -+ * also open-code relevant parts of adjust_guest_l1e(). Don't mirror -+ * available and cachability flags, though. -+ */ -+ if ( !is_pv_32bit_domain(curr->domain) ) -+ grant_pte_flags |= (grant_pte_flags & _PAGE_USER) -+ ? _PAGE_GLOBAL -+ : _PAGE_GUEST_KERNEL | _PAGE_USER; -+ - if ( flags & GNTMAP_contains_pte ) - { - if ( !new_addr ) -- return destroy_grant_pte_mapping(addr, frame, curr->domain); -+ return destroy_grant_pte_mapping(addr, frame, grant_pte_flags, -+ curr->domain); - - MEM_LOG("Unsupported grant table operation"); - return GNTST_general_error; - } - - if ( !new_addr ) -- return destroy_grant_va_mapping(addr, frame, curr); -+ return destroy_grant_va_mapping(addr, frame, grant_pte_flags, curr); - - pl1e = guest_map_l1e(new_addr, &gl1mfn); - if ( !pl1e ) -@@ -4369,7 +4414,7 @@ int replace_grant_host_mapping( - put_page(l1pg); - guest_unmap_l1e(pl1e); - -- rc = replace_grant_va_mapping(addr, frame, ol1e, curr); -+ rc = replace_grant_va_mapping(addr, frame, grant_pte_flags, ol1e, curr); - if ( rc && !paging_mode_refcounts(curr->domain) ) - put_page_from_l1e(ol1e, curr->domain); - diff --git a/sysutils/xenkernel48/patches/patch-XSA237 b/sysutils/xenkernel48/patches/patch-XSA237 deleted file mode 100644 index 760a9e6a5a4..00000000000 --- a/sysutils/xenkernel48/patches/patch-XSA237 +++ /dev/null @@ -1,311 +0,0 @@ -$NetBSD: patch-XSA237,v 1.1 2017/10/17 08:42:30 bouyer Exp $ - -From: Jan Beulich <jbeulich@suse.com> -Subject: x86: don't allow MSI pIRQ mapping on unowned device - -MSI setup should be permitted only for existing devices owned by the -respective guest (the operation may still be carried out by the domain -controlling that guest). - -This is part of XSA-237. - -Reported-by: HW42 <hw42@ipsumj.de> -Signed-off-by: Jan Beulich <jbeulich@suse.com> -Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com> - ---- xen/arch/x86/irq.c.orig -+++ xen/arch/x86/irq.c -@@ -1964,7 +1964,10 @@ int map_domain_pirq( - if ( !cpu_has_apic ) - goto done; - -- pdev = pci_get_pdev(msi->seg, msi->bus, msi->devfn); -+ pdev = pci_get_pdev_by_domain(d, msi->seg, msi->bus, msi->devfn); -+ if ( !pdev ) -+ goto done; -+ - ret = pci_enable_msi(msi, &msi_desc); - if ( ret ) - { -From: Jan Beulich <jbeulich@suse.com> -Subject: x86: enforce proper privilege when (un)mapping pIRQ-s - -(Un)mapping of IRQs, just like other RESOURCE__ADD* / RESOURCE__REMOVE* -actions (in FLASK terms) should be XSM_DM_PRIV rather than XSM_TARGET. -This in turn requires bypassing the XSM check in physdev_unmap_pirq() -for the HVM emuirq case just like is being done in physdev_map_pirq(). -The primary goal security wise, however, is to no longer allow HVM -guests, by specifying their own domain ID instead of DOMID_SELF, to -enter code paths intended for PV guest and the control domains of HVM -guests only. - -This is part of XSA-237. - -Reported-by: HW42 <hw42@ipsumj.de> -Signed-off-by: Jan Beulich <jbeulich@suse.com> -Reviewed-by: George Dunlap <george.dunlap@citrix.com> - ---- xen/arch/x86/physdev.c.orig -+++ xen/arch/x86/physdev.c -@@ -110,7 +110,7 @@ int physdev_map_pirq(domid_t domid, int - if ( d == NULL ) - return -ESRCH; - -- ret = xsm_map_domain_pirq(XSM_TARGET, d); -+ ret = xsm_map_domain_pirq(XSM_DM_PRIV, d); - if ( ret ) - goto free_domain; - -@@ -255,13 +255,14 @@ int physdev_map_pirq(domid_t domid, int - int physdev_unmap_pirq(domid_t domid, int pirq) - { - struct domain *d; -- int ret; -+ int ret = 0; - - d = rcu_lock_domain_by_any_id(domid); - if ( d == NULL ) - return -ESRCH; - -- ret = xsm_unmap_domain_pirq(XSM_TARGET, d); -+ if ( domid != DOMID_SELF || !is_hvm_domain(d) ) -+ ret = xsm_unmap_domain_pirq(XSM_DM_PRIV, d); - if ( ret ) - goto free_domain; - ---- xen/include/xsm/dummy.h.orig -+++ xen/include/xsm/dummy.h -@@ -453,7 +453,7 @@ static XSM_INLINE char *xsm_show_irq_sid - - static XSM_INLINE int xsm_map_domain_pirq(XSM_DEFAULT_ARG struct domain *d) - { -- XSM_ASSERT_ACTION(XSM_TARGET); -+ XSM_ASSERT_ACTION(XSM_DM_PRIV); - return xsm_default_action(action, current->domain, d); - } - -@@ -465,7 +465,7 @@ static XSM_INLINE int xsm_map_domain_irq - - static XSM_INLINE int xsm_unmap_domain_pirq(XSM_DEFAULT_ARG struct domain *d) - { -- XSM_ASSERT_ACTION(XSM_TARGET); -+ XSM_ASSERT_ACTION(XSM_DM_PRIV); - return xsm_default_action(action, current->domain, d); - } - -From: Jan Beulich <jbeulich@suse.com> -Subject: x86/MSI: disallow redundant enabling - -At the moment, Xen attempts to allow redundant enabling of MSI by -having pci_enable_msi() return 0, and point to the existing MSI -descriptor, when the msi already exists. - -Unfortunately, if subsequent errors are encountered, the cleanup -paths assume pci_enable_msi() had done full initialization, and -hence undo everything that was assumed to be done by that -function without also undoing other setup that would normally -occur only after that function was called (in map_domain_pirq() -itself). - -Rather than try to make the redundant enabling case work properly, just -forbid it entirely by having pci_enable_msi() return -EEXIST when MSI -is already set up. - -This is part of XSA-237. - -Reported-by: HW42 <hw42@ipsumj.de> -Signed-off-by: Jan Beulich <jbeulich@suse.com> -Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com> -Reviewed-by: George Dunlap <george.dunlap@citrix.com> - ---- xen/arch/x86/msi.c.orig -+++ xen/arch/x86/msi.c -@@ -1050,11 +1050,10 @@ static int __pci_enable_msi(struct msi_i - old_desc = find_msi_entry(pdev, msi->irq, PCI_CAP_ID_MSI); - if ( old_desc ) - { -- printk(XENLOG_WARNING "irq %d already mapped to MSI on %04x:%02x:%02x.%u\n", -+ printk(XENLOG_ERR "irq %d already mapped to MSI on %04x:%02x:%02x.%u\n", - msi->irq, msi->seg, msi->bus, - PCI_SLOT(msi->devfn), PCI_FUNC(msi->devfn)); -- *desc = old_desc; -- return 0; -+ return -EEXIST; - } - - old_desc = find_msi_entry(pdev, -1, PCI_CAP_ID_MSIX); -@@ -1118,11 +1117,10 @@ static int __pci_enable_msix(struct msi_ - old_desc = find_msi_entry(pdev, msi->irq, PCI_CAP_ID_MSIX); - if ( old_desc ) - { -- printk(XENLOG_WARNING "irq %d already mapped to MSI-X on %04x:%02x:%02x.%u\n", -+ printk(XENLOG_ERR "irq %d already mapped to MSI-X on %04x:%02x:%02x.%u\n", - msi->irq, msi->seg, msi->bus, - PCI_SLOT(msi->devfn), PCI_FUNC(msi->devfn)); -- *desc = old_desc; -- return 0; -+ return -EEXIST; - } - - old_desc = find_msi_entry(pdev, -1, PCI_CAP_ID_MSI); -From: Jan Beulich <jbeulich@suse.com> -Subject: x86/IRQ: conditionally preserve irq <-> pirq mapping on map error paths - -Mappings that had been set up before should not be torn down when -handling unrelated errors. - -This is part of XSA-237. - -Reported-by: HW42 <hw42@ipsumj.de> -Signed-off-by: Jan Beulich <jbeulich@suse.com> -Reviewed-by: George Dunlap <george.dunlap@citrix.com> - ---- xen/arch/x86/irq.c.orig -+++ xen/arch/x86/irq.c -@@ -1252,7 +1252,8 @@ static int prepare_domain_irq_pirq(struc - return -ENOMEM; - } - *pinfo = info; -- return 0; -+ -+ return !!err; - } - - static void set_domain_irq_pirq(struct domain *d, int irq, struct pirq *pirq) -@@ -1295,7 +1296,10 @@ int init_domain_irq_mapping(struct domai - continue; - err = prepare_domain_irq_pirq(d, i, i, &info); - if ( err ) -+ { -+ ASSERT(err < 0); - break; -+ } - set_domain_irq_pirq(d, i, info); - } - -@@ -1903,6 +1907,7 @@ int map_domain_pirq( - struct pirq *info; - struct irq_desc *desc; - unsigned long flags; -+ DECLARE_BITMAP(prepared, MAX_MSI_IRQS) = {}; - - ASSERT(spin_is_locked(&d->event_lock)); - -@@ -1946,8 +1951,10 @@ int map_domain_pirq( - } - - ret = prepare_domain_irq_pirq(d, irq, pirq, &info); -- if ( ret ) -+ if ( ret < 0 ) - goto revoke; -+ if ( !ret ) -+ __set_bit(0, prepared); - - desc = irq_to_desc(irq); - -@@ -2019,8 +2026,10 @@ int map_domain_pirq( - irq = create_irq(NUMA_NO_NODE); - ret = irq >= 0 ? prepare_domain_irq_pirq(d, irq, pirq + nr, &info) - : irq; -- if ( ret ) -+ if ( ret < 0 ) - break; -+ if ( !ret ) -+ __set_bit(nr, prepared); - msi_desc[nr].irq = irq; - - if ( irq_permit_access(d, irq) != 0 ) -@@ -2053,15 +2062,15 @@ int map_domain_pirq( - desc->msi_desc = NULL; - spin_unlock_irqrestore(&desc->lock, flags); - } -- while ( nr-- ) -+ while ( nr ) - { - if ( irq >= 0 && irq_deny_access(d, irq) ) - printk(XENLOG_G_ERR - "dom%d: could not revoke access to IRQ%d (pirq %d)\n", - d->domain_id, irq, pirq); -- if ( info ) -+ if ( info && test_bit(nr, prepared) ) - cleanup_domain_irq_pirq(d, irq, info); -- info = pirq_info(d, pirq + nr); -+ info = pirq_info(d, pirq + --nr); - irq = info->arch.irq; - } - msi_desc->irq = -1; -@@ -2077,12 +2086,14 @@ int map_domain_pirq( - spin_lock_irqsave(&desc->lock, flags); - set_domain_irq_pirq(d, irq, info); - spin_unlock_irqrestore(&desc->lock, flags); -+ ret = 0; - } - - done: - if ( ret ) - { -- cleanup_domain_irq_pirq(d, irq, info); -+ if ( test_bit(0, prepared) ) -+ cleanup_domain_irq_pirq(d, irq, info); - revoke: - if ( irq_deny_access(d, irq) ) - printk(XENLOG_G_ERR ---- xen/arch/x86/physdev.c.orig -+++ xen/arch/x86/physdev.c -@@ -185,7 +185,7 @@ int physdev_map_pirq(domid_t domid, int - } - else if ( type == MAP_PIRQ_TYPE_MULTI_MSI ) - { -- if ( msi->entry_nr <= 0 || msi->entry_nr > 32 ) -+ if ( msi->entry_nr <= 0 || msi->entry_nr > MAX_MSI_IRQS ) - ret = -EDOM; - else if ( msi->entry_nr != 1 && !iommu_intremap ) - ret = -EOPNOTSUPP; ---- xen/include/asm-x86/msi.h.orig -+++ xen/include/asm-x86/msi.h -@@ -55,6 +55,8 @@ - /* MAX fixed pages reserved for mapping MSIX tables. */ - #define FIX_MSIX_MAX_PAGES 512 - -+#define MAX_MSI_IRQS 32 /* limited by MSI capability struct properties */ -+ - struct msi_info { - u16 seg; - u8 bus; -From: Jan Beulich <jbeulich@suse.com> -Subject: x86/FLASK: fix unmap-domain-IRQ XSM hook - -The caller and the FLASK implementation of xsm_unmap_domain_irq() -disagreed about what the "data" argument points to in the MSI case: -Change both sides to pass/take a PCI device. - -This is part of XSA-237. - -Signed-off-by: Jan Beulich <jbeulich@suse.com> -Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com> - ---- xen/arch/x86/irq.c.orig -+++ xen/arch/x86/irq.c -@@ -2144,7 +2144,8 @@ int unmap_domain_pirq(struct domain *d, - nr = msi_desc->msi.nvec; - } - -- ret = xsm_unmap_domain_irq(XSM_HOOK, d, irq, msi_desc); -+ ret = xsm_unmap_domain_irq(XSM_HOOK, d, irq, -+ msi_desc ? msi_desc->dev : NULL); - if ( ret ) - goto done; - ---- xen/xsm/flask/hooks.c.orig -+++ xen/xsm/flask/hooks.c -@@ -915,8 +915,8 @@ static int flask_unmap_domain_msi (struc - u32 *sid, struct avc_audit_data *ad) - { - #ifdef CONFIG_HAS_PCI -- struct msi_info *msi = data; -- u32 machine_bdf = (msi->seg << 16) | (msi->bus << 8) | msi->devfn; -+ const struct pci_dev *pdev = data; -+ u32 machine_bdf = (pdev->seg << 16) | (pdev->bus << 8) | pdev->devfn; - - AVC_AUDIT_DATA_INIT(ad, DEV); - ad->device = machine_bdf; diff --git a/sysutils/xenkernel48/patches/patch-XSA238 b/sysutils/xenkernel48/patches/patch-XSA238 deleted file mode 100644 index 4835be6fc7b..00000000000 --- a/sysutils/xenkernel48/patches/patch-XSA238 +++ /dev/null @@ -1,47 +0,0 @@ -$NetBSD: patch-XSA238,v 1.1 2017/10/17 08:42:30 bouyer Exp $ - -From cdc2887076b19b39fab9faec495082586f3113df Mon Sep 17 00:00:00 2001 -From: XenProject Security Team <security@xenproject.org> -Date: Tue, 5 Sep 2017 13:41:37 +0200 -Subject: x86/ioreq server: correctly handle bogus - XEN_DMOP_{,un}map_io_range_to_ioreq_server arguments - -Misbehaving device model can pass incorrect XEN_DMOP_map/ -unmap_io_range_to_ioreq_server arguments, namely end < start when -specifying address range. When this happens we hit ASSERT(s <= e) in -rangeset_contains_range()/rangeset_overlaps_range() with debug builds. -Production builds will not trap right away but may misbehave later -while handling such bogus ranges. - -This is XSA-238. - -Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> -Reviewed-by: Jan Beulich <jbeulich@suse.com> ---- - xen/arch/x86/hvm/ioreq.c | 6 ++++++ - 1 file changed, 6 insertions(+) - -diff --git a/xen/arch/x86/hvm/ioreq.c b/xen/arch/x86/hvm/ioreq.c -index b2a8b0e986..8c8bf1f0ec 100644 ---- xen/arch/x86/hvm/ioreq.c.orig -+++ xen/arch/x86/hvm/ioreq.c -@@ -820,6 +820,9 @@ int hvm_map_io_range_to_ioreq_server(struct domain *d, ioservid_t id, - struct hvm_ioreq_server *s; - int rc; - -+ if ( start > end ) -+ return -EINVAL; -+ - spin_lock_recursive(&d->arch.hvm_domain.ioreq_server.lock); - - rc = -ENOENT; -@@ -872,6 +875,9 @@ int hvm_unmap_io_range_from_ioreq_server(struct domain *d, ioservid_t id, - struct hvm_ioreq_server *s; - int rc; - -+ if ( start > end ) -+ return -EINVAL; -+ - spin_lock_recursive(&d->arch.hvm_domain.ioreq_server.lock); - - rc = -ENOENT; diff --git a/sysutils/xenkernel48/patches/patch-XSA239 b/sysutils/xenkernel48/patches/patch-XSA239 deleted file mode 100644 index dea0ad151f3..00000000000 --- a/sysutils/xenkernel48/patches/patch-XSA239 +++ /dev/null @@ -1,48 +0,0 @@ -$NetBSD: patch-XSA239,v 1.1 2017/10/17 08:42:30 bouyer Exp $ - -From: Jan Beulich <jbeulich@suse.com> -Subject: x86/HVM: prefill partially used variable on emulation paths - -Certain handlers ignore the access size (vioapic_write() being the -example this was found with), perhaps leading to subsequent reads -seeing data that wasn't actually written by the guest. For -consistency and extra safety also do this on the read path of -hvm_process_io_intercept(), even if this doesn't directly affect what -guests get to see, as we've supposedly already dealt with read handlers -leaving data completely unitialized. - -This is XSA-239. - -Reported-by: Roger Pau Monné <roger.pau@citrix.com> -Reviewed-by: Roger Pau Monné <roger.pau@citrix.com> -Signed-off-by: Jan Beulich <jbeulich@suse.com> - ---- xen/arch/x86/hvm/emulate.c.orig -+++ xen/arch/x86/hvm/emulate.c -@@ -129,7 +129,7 @@ static int hvmemul_do_io( - .count = *reps, - .dir = dir, - .df = df, -- .data = data, -+ .data = data_is_addr ? data : 0, - .data_is_ptr = data_is_addr, /* ioreq_t field name is misleading */ - .state = STATE_IOREQ_READY, - }; ---- xen/arch/x86/hvm/intercept.c.orig -+++ xen/arch/x86/hvm/intercept.c -@@ -127,6 +127,7 @@ int hvm_process_io_intercept(const struc - addr = (p->type == IOREQ_TYPE_COPY) ? - p->addr + step * i : - p->addr; -+ data = 0; - rc = ops->read(handler, addr, p->size, &data); - if ( rc != X86EMUL_OKAY ) - break; -@@ -161,6 +162,7 @@ int hvm_process_io_intercept(const struc - { - if ( p->data_is_ptr ) - { -+ data = 0; - switch ( hvm_copy_from_guest_phys(&data, p->data + step * i, - p->size) ) - { diff --git a/sysutils/xenkernel48/patches/patch-XSA240 b/sysutils/xenkernel48/patches/patch-XSA240 deleted file mode 100644 index 8bc1f97215f..00000000000 --- a/sysutils/xenkernel48/patches/patch-XSA240 +++ /dev/null @@ -1,665 +0,0 @@ -$NetBSD: patch-XSA240,v 1.2 2017/12/15 14:02:15 bouyer Exp $ - -From 2315b8c651e0cc31c9153d09c9912b8fbe632ad2 Mon Sep 17 00:00:00 2001 -From: Jan Beulich <jbeulich@suse.com> -Date: Thu, 28 Sep 2017 15:17:25 +0100 -Subject: [PATCH 1/2] x86: limit linear page table use to a single level - -That's the only way that they're meant to be used. Without such a -restriction arbitrarily long chains of same-level page tables can be -built, tearing down of which may then cause arbitrarily deep recursion, -causing a stack overflow. To facilitate this restriction, a counter is -being introduced to track both the number of same-level entries in a -page table as well as the number of uses of a page table in another -same-level one (counting into positive and negative direction -respectively, utilizing the fact that both counts can't be non-zero at -the same time). - -Note that the added accounting introduces a restriction on the number -of times a page can be used in other same-level page tables - more than -32k of such uses are no longer possible. - -Note also that some put_page_and_type[_preemptible]() calls are -replaced with open-coded equivalents. This seemed preferrable to -adding "parent_table" to the matrix of functions. - -Note further that cross-domain same-level page table references are no -longer permitted (they probably never should have been). - -This is XSA-240. - -Reported-by: Jann Horn <jannh@google.com> -Signed-off-by: Jan Beulich <jbeulich@suse.com> -Signed-off-by: George Dunlap <george.dunlap@citrix.com> ---- - xen/arch/x86/domain.c | 1 + - xen/arch/x86/mm.c | 171 ++++++++++++++++++++++++++++++++++++++----- - xen/include/asm-x86/domain.h | 2 + - xen/include/asm-x86/mm.h | 25 +++++-- - 4 files changed, 175 insertions(+), 24 deletions(-) - -diff --git a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c -index a725b43a67..5265b0496c 100644 ---- xen/arch/x86/domain.c.orig -+++ xen/arch/x86/domain.c -@@ -1245,6 +1245,7 @@ int arch_set_info_guest( - rc = -ERESTART; - /* Fallthrough */ - case -ERESTART: -+ v->arch.old_guest_ptpg = NULL; - v->arch.old_guest_table = - pagetable_get_page(v->arch.guest_table); - v->arch.guest_table = pagetable_null(); -diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c -index a40461d4d6..31d4a03840 100644 ---- xen/arch/x86/mm.c.orig -+++ xen/arch/x86/mm.c -@@ -733,6 +733,61 @@ static void put_data_page( - put_page(page); - } - -+static bool inc_linear_entries(struct page_info *pg) -+{ -+ typeof(pg->linear_pt_count) nc = read_atomic(&pg->linear_pt_count), oc; -+ -+ do { -+ /* -+ * The check below checks for the "linear use" count being non-zero -+ * as well as overflow. Signed integer overflow is undefined behavior -+ * according to the C spec. However, as long as linear_pt_count is -+ * smaller in size than 'int', the arithmetic operation of the -+ * increment below won't overflow; rather the result will be truncated -+ * when stored. Ensure that this is always true. -+ */ -+ BUILD_BUG_ON(sizeof(nc) >= sizeof(int)); -+ oc = nc++; -+ if ( nc <= 0 ) -+ return false; -+ nc = cmpxchg(&pg->linear_pt_count, oc, nc); -+ } while ( oc != nc ); -+ -+ return true; -+} -+ -+static void dec_linear_entries(struct page_info *pg) -+{ -+ typeof(pg->linear_pt_count) oc; -+ -+ oc = arch_fetch_and_add(&pg->linear_pt_count, -1); -+ ASSERT(oc > 0); -+} -+ -+static bool inc_linear_uses(struct page_info *pg) -+{ -+ typeof(pg->linear_pt_count) nc = read_atomic(&pg->linear_pt_count), oc; -+ -+ do { -+ /* See the respective comment in inc_linear_entries(). */ -+ BUILD_BUG_ON(sizeof(nc) >= sizeof(int)); -+ oc = nc--; -+ if ( nc >= 0 ) -+ return false; -+ nc = cmpxchg(&pg->linear_pt_count, oc, nc); -+ } while ( oc != nc ); -+ -+ return true; -+} -+ -+static void dec_linear_uses(struct page_info *pg) -+{ -+ typeof(pg->linear_pt_count) oc; -+ -+ oc = arch_fetch_and_add(&pg->linear_pt_count, 1); -+ ASSERT(oc < 0); -+} -+ - /* - * We allow root tables to map each other (a.k.a. linear page tables). It - * needs some special care with reference counts and access permissions: -@@ -762,15 +817,35 @@ get_##level##_linear_pagetable( \ - \ - if ( (pfn = level##e_get_pfn(pde)) != pde_pfn ) \ - { \ -+ struct page_info *ptpg = mfn_to_page(pde_pfn); \ -+ \ -+ /* Make sure the page table belongs to the correct domain. */ \ -+ if ( unlikely(page_get_owner(ptpg) != d) ) \ -+ return 0; \ -+ \ - /* Make sure the mapped frame belongs to the correct domain. */ \ - if ( unlikely(!get_page_from_pagenr(pfn, d)) ) \ - return 0; \ - \ - /* \ -- * Ensure that the mapped frame is an already-validated page table. \ -+ * Ensure that the mapped frame is an already-validated page table \ -+ * and is not itself having linear entries, as well as that the \ -+ * containing page table is not iself in use as a linear page table \ -+ * elsewhere. \ - * If so, atomically increment the count (checking for overflow). \ - */ \ - page = mfn_to_page(pfn); \ -+ if ( !inc_linear_entries(ptpg) ) \ -+ { \ -+ put_page(page); \ -+ return 0; \ -+ } \ -+ if ( !inc_linear_uses(page) ) \ -+ { \ -+ dec_linear_entries(ptpg); \ -+ put_page(page); \ -+ return 0; \ -+ } \ - y = page->u.inuse.type_info; \ - do { \ - x = y; \ -@@ -778,6 +853,8 @@ get_##level##_linear_pagetable( \ - unlikely((x & (PGT_type_mask|PGT_validated)) != \ - (PGT_##level##_page_table|PGT_validated)) ) \ - { \ -+ dec_linear_uses(page); \ -+ dec_linear_entries(ptpg); \ - put_page(page); \ - return 0; \ - } \ -@@ -1202,6 +1279,9 @@ get_page_from_l4e( - l3e_remove_flags((pl3e), _PAGE_USER|_PAGE_RW|_PAGE_ACCESSED); \ - } while ( 0 ) - -+static int _put_page_type(struct page_info *page, bool preemptible, -+ struct page_info *ptpg); -+ - void put_page_from_l1e(l1_pgentry_t l1e, struct domain *l1e_owner) - { - unsigned long pfn = l1e_get_pfn(l1e); -@@ -1271,17 +1351,22 @@ static int put_page_from_l2e(l2_pgentry_t l2e, unsigned long pfn) - if ( l2e_get_flags(l2e) & _PAGE_PSE ) - put_superpage(l2e_get_pfn(l2e)); - else -- put_page_and_type(l2e_get_page(l2e)); -+ { -+ struct page_info *pg = l2e_get_page(l2e); -+ int rc = _put_page_type(pg, false, mfn_to_page(pfn)); -+ -+ ASSERT(!rc); -+ put_page(pg); -+ } - - return 0; - } - --static int __put_page_type(struct page_info *, int preemptible); -- - static int put_page_from_l3e(l3_pgentry_t l3e, unsigned long pfn, - int partial, bool_t defer) - { - struct page_info *pg; -+ int rc; - - if ( !(l3e_get_flags(l3e) & _PAGE_PRESENT) || (l3e_get_pfn(l3e) == pfn) ) - return 1; -@@ -1304,21 +1389,28 @@ static int put_page_from_l3e(l3_pgentry_t l3e, unsigned long pfn, - if ( unlikely(partial > 0) ) - { - ASSERT(!defer); -- return __put_page_type(pg, 1); -+ return _put_page_type(pg, true, mfn_to_page(pfn)); - } - - if ( defer ) - { -+ current->arch.old_guest_ptpg = mfn_to_page(pfn); - current->arch.old_guest_table = pg; - return 0; - } - -- return put_page_and_type_preemptible(pg); -+ rc = _put_page_type(pg, true, mfn_to_page(pfn)); -+ if ( likely(!rc) ) -+ put_page(pg); -+ -+ return rc; - } - - static int put_page_from_l4e(l4_pgentry_t l4e, unsigned long pfn, - int partial, bool_t defer) - { -+ int rc = 1; -+ - if ( (l4e_get_flags(l4e) & _PAGE_PRESENT) && - (l4e_get_pfn(l4e) != pfn) ) - { -@@ -1327,18 +1419,22 @@ static int put_page_from_l4e(l4_pgentry_t l4e, unsigned long pfn, - if ( unlikely(partial > 0) ) - { - ASSERT(!defer); -- return __put_page_type(pg, 1); -+ return _put_page_type(pg, true, mfn_to_page(pfn)); - } - - if ( defer ) - { -+ current->arch.old_guest_ptpg = mfn_to_page(pfn); - current->arch.old_guest_table = pg; - return 0; - } - -- return put_page_and_type_preemptible(pg); -+ rc = _put_page_type(pg, true, mfn_to_page(pfn)); -+ if ( likely(!rc) ) -+ put_page(pg); - } -- return 1; -+ -+ return rc; - } - - static int alloc_l1_table(struct page_info *page) -@@ -1536,6 +1632,7 @@ static int alloc_l3_table(struct page_info *page) - { - page->nr_validated_ptes = i; - page->partial_pte = 0; -+ current->arch.old_guest_ptpg = NULL; - current->arch.old_guest_table = page; - } - while ( i-- > 0 ) -@@ -1628,6 +1725,7 @@ static int alloc_l4_table(struct page_info *page) - { - if ( current->arch.old_guest_table ) - page->nr_validated_ptes++; -+ current->arch.old_guest_ptpg = NULL; - current->arch.old_guest_table = page; - } - } -@@ -2370,14 +2468,20 @@ int free_page_type(struct page_info *pag - } - - --static int __put_final_page_type( -- struct page_info *page, unsigned long type, int preemptible) -+static int _put_final_page_type(struct page_info *page, unsigned long type, -+ bool preemptible, struct page_info *ptpg) - { - int rc = free_page_type(page, type, preemptible); - - /* No need for atomic update of type_info here: noone else updates it. */ - if ( rc == 0 ) - { -+ if ( ptpg && PGT_type_equal(type, ptpg->u.inuse.type_info) ) -+ { -+ dec_linear_uses(page); -+ dec_linear_entries(ptpg); -+ } -+ ASSERT(!page->linear_pt_count || page_get_owner(page)->is_dying); - /* - * Record TLB information for flush later. We do not stamp page tables - * when running in shadow mode: -@@ -2413,8 +2517,8 @@ static int __put_final_page_type( - } - - --static int __put_page_type(struct page_info *page, -- int preemptible) -+static int _put_page_type(struct page_info *page, bool preemptible, -+ struct page_info *ptpg) - { - unsigned long nx, x, y = page->u.inuse.type_info; - int rc = 0; -@@ -2441,12 +2545,28 @@ static int __put_page_type(struct page_info *page, - x, nx)) != x) ) - continue; - /* We cleared the 'valid bit' so we do the clean up. */ -- rc = __put_final_page_type(page, x, preemptible); -+ rc = _put_final_page_type(page, x, preemptible, ptpg); -+ ptpg = NULL; - if ( x & PGT_partial ) - put_page(page); - break; - } - -+ if ( ptpg && PGT_type_equal(x, ptpg->u.inuse.type_info) ) -+ { -+ /* -+ * page_set_tlbflush_timestamp() accesses the same union -+ * linear_pt_count lives in. Unvalidated page table pages, -+ * however, should occur during domain destruction only -+ * anyway. Updating of linear_pt_count luckily is not -+ * necessary anymore for a dying domain. -+ */ -+ ASSERT(page_get_owner(page)->is_dying); -+ ASSERT(page->linear_pt_count < 0); -+ ASSERT(ptpg->linear_pt_count > 0); -+ ptpg = NULL; -+ } -+ - /* - * Record TLB information for flush later. We do not stamp page - * tables when running in shadow mode: -@@ -2466,6 +2586,13 @@ static int __put_page_type(struct page_info *page, - return -EINTR; - } - -+ if ( ptpg && PGT_type_equal(x, ptpg->u.inuse.type_info) ) -+ { -+ ASSERT(!rc); -+ dec_linear_uses(page); -+ dec_linear_entries(ptpg); -+ } -+ - return rc; - } - -@@ -2600,6 +2727,7 @@ static int __get_page_type(struct page_info *page, unsigned long type, - page->nr_validated_ptes = 0; - page->partial_pte = 0; - } -+ page->linear_pt_count = 0; - rc = alloc_page_type(page, type, preemptible); - } - -@@ -2614,7 +2742,7 @@ static int __get_page_type(struct page_info *page, unsigned long type, - - void put_page_type(struct page_info *page) - { -- int rc = __put_page_type(page, 0); -+ int rc = _put_page_type(page, false, NULL); - ASSERT(rc == 0); - (void)rc; - } -@@ -2630,7 +2758,7 @@ int get_page_type(struct page_info *page, unsigned long type) - - int put_page_type_preemptible(struct page_info *page) - { -- return __put_page_type(page, 1); -+ return _put_page_type(page, true, NULL); - } - - int get_page_type_preemptible(struct page_info *page, unsigned long type) -@@ -2836,11 +2964,14 @@ int put_old_guest_table(struct vcpu *v) - if ( !v->arch.old_guest_table ) - return 0; - -- switch ( rc = put_page_and_type_preemptible(v->arch.old_guest_table) ) -+ switch ( rc = _put_page_type(v->arch.old_guest_table, true, -+ v->arch.old_guest_ptpg) ) - { - case -EINTR: - case -ERESTART: - return -ERESTART; -+ case 0: -+ put_page(v->arch.old_guest_table); - } - - v->arch.old_guest_table = NULL; -@@ -2997,6 +3128,7 @@ int new_guest_cr3(unsigned long mfn) - rc = -ERESTART; - /* fallthrough */ - case -ERESTART: -+ curr->arch.old_guest_ptpg = NULL; - curr->arch.old_guest_table = page; - break; - default: -@@ -3264,7 +3396,10 @@ long do_mmuext_op( - if ( type == PGT_l1_page_table ) - put_page_and_type(page); - else -+ { -+ curr->arch.old_guest_ptpg = NULL; - curr->arch.old_guest_table = page; -+ } - } - } - -@@ -3297,6 +3432,7 @@ long do_mmuext_op( - { - case -EINTR: - case -ERESTART: -+ curr->arch.old_guest_ptpg = NULL; - curr->arch.old_guest_table = page; - rc = 0; - break; -@@ -3375,6 +3511,7 @@ long do_mmuext_op( - rc = -ERESTART; - /* fallthrough */ - case -ERESTART: -+ curr->arch.old_guest_ptpg = NULL; - curr->arch.old_guest_table = page; - break; - default: -diff --git a/xen/include/asm-x86/domain.h b/xen/include/asm-x86/domain.h -index f6a40eb881..60bb8c9014 100644 ---- xen/include/asm-x86/domain.h.orig -+++ xen/include/asm-x86/domain.h -@@ -531,6 +531,8 @@ struct arch_vcpu - pagetable_t guest_table_user; /* (MFN) x86/64 user-space pagetable */ - pagetable_t guest_table; /* (MFN) guest notion of cr3 */ - struct page_info *old_guest_table; /* partially destructed pagetable */ -+ struct page_info *old_guest_ptpg; /* containing page table of the */ -+ /* former, if any */ - /* guest_table holds a ref to the page, and also a type-count unless - * shadow refcounts are in use */ - pagetable_t shadow_table[4]; /* (MFN) shadow(s) of guest */ -diff --git a/xen/include/asm-x86/mm.h b/xen/include/asm-x86/mm.h -index 6687dbc985..63590a7716 100644 ---- xen/include/asm-x86/mm.h.orig -+++ xen/include/asm-x86/mm.h -@@ -125,11 +125,11 @@ struct page_info - u32 tlbflush_timestamp; - - /* -- * When PGT_partial is true then this field is valid and indicates -- * that PTEs in the range [0, @nr_validated_ptes) have been validated. -- * An extra page reference must be acquired (or not dropped) whenever -- * PGT_partial gets set, and it must be dropped when the flag gets -- * cleared. This is so that a get() leaving a page in partially -+ * When PGT_partial is true then the first two fields are valid and -+ * indicate that PTEs in the range [0, @nr_validated_ptes) have been -+ * validated. An extra page reference must be acquired (or not dropped) -+ * whenever PGT_partial gets set, and it must be dropped when the flag -+ * gets cleared. This is so that a get() leaving a page in partially - * validated state (where the caller would drop the reference acquired - * due to the getting of the type [apparently] failing [-ERESTART]) - * would not accidentally result in a page left with zero general -@@ -153,10 +153,18 @@ struct page_info - * put_page_from_lNe() (due to the apparent failure), and hence it - * must be dropped when the put operation is resumed (and completes), - * but it must not be acquired if picking up the page for validation. -+ * -+ * The 3rd field, @linear_pt_count, indicates -+ * - by a positive value, how many same-level page table entries a page -+ * table has, -+ * - by a negative value, in how many same-level page tables a page is -+ * in use. - */ - struct { -- u16 nr_validated_ptes; -- s8 partial_pte; -+ u16 nr_validated_ptes:PAGETABLE_ORDER + 1; -+ u16 :16 - PAGETABLE_ORDER - 1 - 2; -+ s16 partial_pte:2; -+ s16 linear_pt_count; - }; - - /* -@@ -207,6 +215,9 @@ struct page_info - #define PGT_count_width PG_shift(9) - #define PGT_count_mask ((1UL<<PGT_count_width)-1) - -+/* Are the 'type mask' bits identical? */ -+#define PGT_type_equal(x, y) (!(((x) ^ (y)) & PGT_type_mask)) -+ - /* Cleared when the owning guest 'frees' this page. */ - #define _PGC_allocated PG_shift(1) - #define PGC_allocated PG_mask(1, 1) --- -2.14.1 - -From 41d579aad2fee971e5ce0279a9b559a0fdc74452 Mon Sep 17 00:00:00 2001 -From: George Dunlap <george.dunlap@citrix.com> -Date: Fri, 22 Sep 2017 11:46:55 +0100 -Subject: [PATCH 2/2] x86/mm: Disable PV linear pagetables by default - -Allowing pagetables to point to other pagetables of the same level -(often called 'linear pagetables') has been included in Xen since its -inception. But it is not used by the most common PV guests (Linux, -NetBSD, minios), and has been the source of a number of subtle -reference-counting bugs. - -Add a command-line option to control whether PV linear pagetables are -allowed (disabled by default). - -Reported-by: Jann Horn <jannh@google.com> -Signed-off-by: George Dunlap <george.dunlap@citrix.com> -Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com> ---- -Changes since v2: -- s/_/-/; in command-line option -- Added __read_mostly ---- - docs/misc/xen-command-line.markdown | 15 +++++++++++++++ - xen/arch/x86/mm.c | 9 +++++++++ - 2 files changed, 24 insertions(+) - -diff --git a/docs/misc/xen-command-line.markdown b/docs/misc/xen-command-line.markdown -index 54acc60723..ffa66eb146 100644 ---- docs/misc/xen-command-line.markdown.orig -+++ docs/misc/xen-command-line.markdown -@@ -1350,6 +1350,21 @@ The following resources are available: - CDP, one COS will corespond two CBMs other than one with CAT, due to the - sum of CBMs is fixed, that means actual `cos_max` in use will automatically - reduce to half when CDP is enabled. -+ -+### pv-linear-pt -+> `= <boolean>` -+ -+> Default: `false` -+ -+Allow PV guests to have pagetable entries pointing to other pagetables -+of the same level (i.e., allowing L2 PTEs to point to other L2 pages). -+This technique is often called "linear pagetables", and is sometimes -+used to allow operating systems a simple way to consistently map the -+current process's pagetables into its own virtual address space. -+ -+None of the most common PV operating systems (Linux, NetBSD, MiniOS) -+use this technique, but there may be custom operating systems which -+do. - - ### reboot - > `= t[riple] | k[bd] | a[cpi] | p[ci] | P[ower] | e[fi] | n[o] [, [w]arm | [c]old]` -diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c -index 31d4a03840..5d125cff3a 100644 ---- xen/arch/x86/mm.c.orig -+++ xen/arch/x86/mm.c -@@ -800,6 +800,9 @@ static void dec_linear_uses(struct page_info *pg) - * frame if it is mapped by a different root table. This is sufficient and - * also necessary to allow validation of a root table mapping itself. - */ -+static bool __read_mostly pv_linear_pt_enable = true; -+boolean_param("pv-linear-pt", pv_linear_pt_enable); -+ - #define define_get_linear_pagetable(level) \ - static int \ - get_##level##_linear_pagetable( \ -@@ -809,6 +812,12 @@ get_##level##_linear_pagetable( \ - struct page_info *page; \ - unsigned long pfn; \ - \ -+ if ( !pv_linear_pt_enable ) \ -+ { \ -+ MEM_LOG("Attempt to create linear p.t. (feature disabled)"); \ -+ return 0; \ -+ } \ -+ \ - if ( (level##e_get_flags(pde) & _PAGE_RW) ) \ - { \ - MEM_LOG("Attempt to create linear p.t. with write perms"); \ --- -2.14.1 - -From: Jan Beulich <jbeulich@suse.com> -Subject: x86: don't wrongly trigger linear page table assertion - -_put_page_type() may do multiple iterations until its cmpxchg() -succeeds. It invokes set_tlbflush_timestamp() on the first -iteration, however. Code inside the function takes care of this, but -- the assertion in _put_final_page_type() would trigger on the second - iteration if time stamps in a debug build are permitted to be - sufficiently much wider than the default 6 bits (see WRAP_MASK in - flushtlb.c), -- it returning -EINTR (for a continuation to be scheduled) would leave - the page inconsistent state (until the re-invocation completes). -Make the set_tlbflush_timestamp() invocation conditional, bypassing it -(for now) only in the case we really can't tolerate the stamp to be -stored. - -This is part of XSA-240. - -Signed-off-by: Jan Beulich <jbeulich@suse.com> -Reviewed-by: George Dunlap <george.dunlap@citrix.com> - ---- xen/arch/x86/mm.c.orig -+++ xen/arch/x86/mm.c -@@ -2561,30 +2561,21 @@ - break; - } - -- if ( ptpg && PGT_type_equal(x, ptpg->u.inuse.type_info) ) -- { -- /* -- * page_set_tlbflush_timestamp() accesses the same union -- * linear_pt_count lives in. Unvalidated page table pages, -- * however, should occur during domain destruction only -- * anyway. Updating of linear_pt_count luckily is not -- * necessary anymore for a dying domain. -- */ -- ASSERT(page_get_owner(page)->is_dying); -- ASSERT(page->linear_pt_count < 0); -- ASSERT(ptpg->linear_pt_count > 0); -- ptpg = NULL; -- } -- - /* - * Record TLB information for flush later. We do not stamp page - * tables when running in shadow mode: - * 1. Pointless, since it's the shadow pt's which must be tracked. - * 2. Shadow mode reuses this field for shadowed page tables to - * store flags info -- we don't want to conflict with that. -+ * Also page_set_tlbflush_timestamp() accesses the same union -+ * linear_pt_count lives in. Pages (including page table ones), -+ * however, don't need their flush time stamp set except when -+ * the last reference is being dropped. For page table pages -+ * this happens in _put_final_page_type(). - */ -- if ( !(shadow_mode_enabled(page_get_owner(page)) && -+ if ( (!ptpg || !PGT_type_equal(x, ptpg->u.inuse.type_info)) && -+ !(shadow_mode_enabled(page_get_owner(page)) && - (page->count_info & PGC_page_table)) ) - page->tlbflush_timestamp = tlbflush_current_time(); - } - -From: Jan Beulich <jbeulich@suse.com> -Subject: x86: don't wrongly trigger linear page table assertion (2) - -_put_final_page_type(), when free_page_type() has exited early to allow -for preemption, should not update the time stamp, as the page continues -to retain the typ which is in the process of being unvalidated. I can't -see why the time stamp update was put on that path in the first place -(albeit it may well have been me who had put it there years ago). - -This is part of XSA-240. - -Signed-off-by: Jan Beulich <jbeulich@suse.com> -Reviewed-by: <George Dunlap <george.dunlap.com> - ---- xen/arch/x86/mm.c.orig -+++ xen/arch/x86/mm.c -@@ -2560,9 +2560,6 @@ static int _put_final_page_type(struct p - { - ASSERT((page->u.inuse.type_info & - (PGT_count_mask|PGT_validated|PGT_partial)) == 1); -- if ( !(shadow_mode_enabled(page_get_owner(page)) && -- (page->count_info & PGC_page_table)) ) -- page->tlbflush_timestamp = tlbflush_current_time(); - wmb(); - page->u.inuse.type_info |= PGT_validated; - } diff --git a/sysutils/xenkernel48/patches/patch-XSA241 b/sysutils/xenkernel48/patches/patch-XSA241 deleted file mode 100644 index 840b744fa43..00000000000 --- a/sysutils/xenkernel48/patches/patch-XSA241 +++ /dev/null @@ -1,104 +0,0 @@ -$NetBSD: patch-XSA241,v 1.2 2017/12/15 14:02:15 bouyer Exp $ - -x86: don't store possibly stale TLB flush time stamp - -While the timing window is extremely narrow, it is theoretically -possible for an update to the TLB flush clock and a subsequent flush -IPI to happen between the read and write parts of the update of the -per-page stamp. Exclude this possibility by disabling interrupts -across the update, preventing the IPI to be serviced in the middle. - -This is XSA-241. - -Reported-by: Jann Horn <jannh@google.com> -Suggested-by: George Dunlap <george.dunlap@citrix.com> -Signed-off-by: Jan Beulich <jbeulich@suse.com> -Reviewed-by: George Dunlap <george.dunlap@citrix.com> - ---- xen/arch/arm/smp.c.orig -+++ xen/arch/arm/smp.c -@@ -1,4 +1,5 @@ - #include <xen/config.h> -+#include <xen/mm.h> - #include <asm/system.h> - #include <asm/smp.h> - #include <asm/cpregs.h> ---- xen/arch/x86/mm.c.orig 2017-12-15 14:29:51.000000000 +0100 -+++ xen/arch/x86/mm.c 2017-12-15 14:30:10.000000000 +0100 -@@ -2500,7 +2500,7 @@ - */ - if ( !(shadow_mode_enabled(page_get_owner(page)) && - (page->count_info & PGC_page_table)) ) -- page->tlbflush_timestamp = tlbflush_current_time(); -+ page_set_tlbflush_timestamp(page); - wmb(); - page->u.inuse.type_info--; - } -@@ -2573,7 +2573,7 @@ - if ( (!ptpg || !PGT_type_equal(x, ptpg->u.inuse.type_info)) && - !(shadow_mode_enabled(page_get_owner(page)) && - (page->count_info & PGC_page_table)) ) -- page->tlbflush_timestamp = tlbflush_current_time(); -+ page_set_tlbflush_timestamp(page); - } - - if ( likely((y = cmpxchg(&page->u.inuse.type_info, x, nx)) == x) ) ---- xen/arch/x86/mm/shadow/common.c.orig -+++ xen/arch/x86/mm/shadow/common.c -@@ -1464,7 +1464,7 @@ void shadow_free(struct domain *d, mfn_t - * TLBs when we reuse the page. Because the destructors leave the - * contents of the pages in place, we can delay TLB flushes until - * just before the allocator hands the page out again. */ -- sp->tlbflush_timestamp = tlbflush_current_time(); -+ page_set_tlbflush_timestamp(sp); - perfc_decr(shadow_alloc_count); - page_list_add_tail(sp, &d->arch.paging.shadow.freelist); - sp = next; ---- xen/common/page_alloc.c.orig -+++ xen/common/page_alloc.c -@@ -960,7 +960,7 @@ static void free_heap_pages( - /* If a page has no owner it will need no safety TLB flush. */ - pg[i].u.free.need_tlbflush = (page_get_owner(&pg[i]) != NULL); - if ( pg[i].u.free.need_tlbflush ) -- pg[i].tlbflush_timestamp = tlbflush_current_time(); -+ page_set_tlbflush_timestamp(&pg[i]); - - /* This page is not a guest frame any more. */ - page_set_owner(&pg[i], NULL); /* set_gpfn_from_mfn snoops pg owner */ ---- xen/include/asm-arm/flushtlb.h.orig -+++ xen/include/asm-arm/flushtlb.h -@@ -12,6 +12,11 @@ static inline void tlbflush_filter(cpuma - - #define tlbflush_current_time() (0) - -+static inline void page_set_tlbflush_timestamp(struct page_info *page) -+{ -+ page->tlbflush_timestamp = tlbflush_current_time(); -+} -+ - #if defined(CONFIG_ARM_32) - # include <asm/arm32/flushtlb.h> - #elif defined(CONFIG_ARM_64) ---- xen/include/asm-x86/flushtlb.h.orig -+++ xen/include/asm-x86/flushtlb.h -@@ -23,6 +23,20 @@ DECLARE_PER_CPU(u32, tlbflush_time); - - #define tlbflush_current_time() tlbflush_clock - -+static inline void page_set_tlbflush_timestamp(struct page_info *page) -+{ -+ /* -+ * Prevent storing a stale time stamp, which could happen if an update -+ * to tlbflush_clock plus a subsequent flush IPI happen between the -+ * reading of tlbflush_clock and the writing of the struct page_info -+ * field. -+ */ -+ ASSERT(local_irq_is_enabled()); -+ local_irq_disable(); -+ page->tlbflush_timestamp = tlbflush_current_time(); -+ local_irq_enable(); -+} -+ - /* - * @cpu_stamp is the timestamp at last TLB flush for the CPU we are testing. - * @lastuse_stamp is a timestamp taken when the PFN we are testing was last diff --git a/sysutils/xenkernel48/patches/patch-XSA242 b/sysutils/xenkernel48/patches/patch-XSA242 deleted file mode 100644 index c5614cd0a79..00000000000 --- a/sysutils/xenkernel48/patches/patch-XSA242 +++ /dev/null @@ -1,45 +0,0 @@ -$NetBSD: patch-XSA242,v 1.2 2017/12/15 14:02:15 bouyer Exp $ - -From: Jan Beulich <jbeulich@suse.com> -Subject: x86: don't allow page_unlock() to drop the last type reference - -Only _put_page_type() does the necessary cleanup, and hence not all -domain pages can be released during guest cleanup (leaving around -zombie domains) if we get this wrong. - -This is XSA-242. - -Signed-off-by: Jan Beulich <jbeulich@suse.com> - ---- xen/arch/x86/mm.c.orig 2017-12-15 14:30:10.000000000 +0100 -+++ xen/arch/x86/mm.c 2017-12-15 14:31:32.000000000 +0100 -@@ -1906,7 +1906,11 @@ - - do { - x = y; -+ ASSERT((x & PGT_count_mask) && (x & PGT_locked)); -+ - nx = x - (1 | PGT_locked); -+ /* We must not drop the last reference here. */ -+ ASSERT(nx & PGT_count_mask); - } while ( (y = cmpxchg(&page->u.inuse.type_info, x, nx)) != x ); - } - -@@ -2575,6 +2579,17 @@ - (page->count_info & PGC_page_table)) ) - page_set_tlbflush_timestamp(page); - } -+ else if ( unlikely((nx & (PGT_locked | PGT_count_mask)) == -+ (PGT_locked | 1)) ) -+ { -+ /* -+ * We must not drop the second to last reference when the page is -+ * locked, as page_unlock() doesn't do any cleanup of the type. -+ */ -+ cpu_relax(); -+ y = page->u.inuse.type_info; -+ continue; -+ } - - if ( likely((y = cmpxchg(&page->u.inuse.type_info, x, nx)) == x) ) - break; diff --git a/sysutils/xenkernel48/patches/patch-XSA243 b/sysutils/xenkernel48/patches/patch-XSA243 deleted file mode 100644 index 1464bba9dcb..00000000000 --- a/sysutils/xenkernel48/patches/patch-XSA243 +++ /dev/null @@ -1,95 +0,0 @@ -$NetBSD: patch-XSA243,v 1.1 2017/10/17 08:42:30 bouyer Exp $ - -From: Andrew Cooper <andrew.cooper3@citrix.com> -Subject: x86/shadow: Don't create self-linear shadow mappings for 4-level translated guests - -When initially creating a monitor table for 4-level translated guests, don't -install a shadow-linear mapping. This mapping is actually self-linear, and -trips up the writeable heuristic logic into following Xen's mappings, not the -guests' shadows it was expecting to follow. - -A consequence of this is that sh_guess_wrmap() needs to cope with there being -no shadow-linear mapping present, which in practice occurs once each time a -vcpu switches to 4-level paging from a different paging mode. - -An appropriate shadow-linear slot will be inserted into the monitor table -either while constructing lower level monitor tables, or by sh_update_cr3(). - -While fixing this, clarify the safety of the other mappings. Despite -appearing unsafe, it is correct to create a guest-linear mapping for -translated domains; this is self-linear and doesn't point into the translated -domain. Drop a dead clause for translate != external guests. - -This is XSA-243. - -Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com> -Acked-by: Tim Deegan <tim@xen.org> - -diff --git a/xen/arch/x86/mm/shadow/multi.c b/xen/arch/x86/mm/shadow/multi.c -index d70b1c6..029e8d4 100644 ---- xen/arch/x86/mm/shadow/multi.c.orig -+++ xen/arch/x86/mm/shadow/multi.c -@@ -1472,26 +1472,38 @@ void sh_install_xen_entries_in_l4(struct domain *d, mfn_t gl4mfn, mfn_t sl4mfn) - sl4e[shadow_l4_table_offset(RO_MPT_VIRT_START)] = shadow_l4e_empty(); - } - -- /* Shadow linear mapping for 4-level shadows. N.B. for 3-level -- * shadows on 64-bit xen, this linear mapping is later replaced by the -- * monitor pagetable structure, which is built in make_monitor_table -- * and maintained by sh_update_linear_entries. */ -- sl4e[shadow_l4_table_offset(SH_LINEAR_PT_VIRT_START)] = -- shadow_l4e_from_mfn(sl4mfn, __PAGE_HYPERVISOR); -- -- /* Self linear mapping. */ -- if ( shadow_mode_translate(d) && !shadow_mode_external(d) ) -+ /* -+ * Linear mapping slots: -+ * -+ * Calling this function with gl4mfn == sl4mfn is used to construct a -+ * monitor table for translated domains. In this case, gl4mfn forms the -+ * self-linear mapping (i.e. not pointing into the translated domain), and -+ * the shadow-linear slot is skipped. The shadow-linear slot is either -+ * filled when constructing lower level monitor tables, or via -+ * sh_update_cr3() for 4-level guests. -+ * -+ * Calling this function with gl4mfn != sl4mfn is used for non-translated -+ * guests, where the shadow-linear slot is actually self-linear, and the -+ * guest-linear slot points into the guests view of its pagetables. -+ */ -+ if ( shadow_mode_translate(d) ) - { -- // linear tables may not be used with translated PV guests -- sl4e[shadow_l4_table_offset(LINEAR_PT_VIRT_START)] = -+ ASSERT(mfn_eq(gl4mfn, sl4mfn)); -+ -+ sl4e[shadow_l4_table_offset(SH_LINEAR_PT_VIRT_START)] = - shadow_l4e_empty(); - } - else - { -- sl4e[shadow_l4_table_offset(LINEAR_PT_VIRT_START)] = -- shadow_l4e_from_mfn(gl4mfn, __PAGE_HYPERVISOR); -+ ASSERT(!mfn_eq(gl4mfn, sl4mfn)); -+ -+ sl4e[shadow_l4_table_offset(SH_LINEAR_PT_VIRT_START)] = -+ shadow_l4e_from_mfn(sl4mfn, __PAGE_HYPERVISOR); - } - -+ sl4e[shadow_l4_table_offset(LINEAR_PT_VIRT_START)] = -+ shadow_l4e_from_mfn(gl4mfn, __PAGE_HYPERVISOR); -+ - unmap_domain_page(sl4e); - } - #endif -@@ -4287,6 +4299,11 @@ static int sh_guess_wrmap(struct vcpu *v, unsigned long vaddr, mfn_t gmfn) - - /* Carefully look in the shadow linear map for the l1e we expect */ - #if SHADOW_PAGING_LEVELS >= 4 -+ /* Is a shadow linear map is installed in the first place? */ -+ sl4p = v->arch.paging.shadow.guest_vtable; -+ sl4p += shadow_l4_table_offset(SH_LINEAR_PT_VIRT_START); -+ if ( !(shadow_l4e_get_flags(*sl4p) & _PAGE_PRESENT) ) -+ return 0; - sl4p = sh_linear_l4_table(v) + shadow_l4_linear_offset(vaddr); - if ( !(shadow_l4e_get_flags(*sl4p) & _PAGE_PRESENT) ) - return 0; diff --git a/sysutils/xenkernel48/patches/patch-XSA244 b/sysutils/xenkernel48/patches/patch-XSA244 deleted file mode 100644 index d241f0af72e..00000000000 --- a/sysutils/xenkernel48/patches/patch-XSA244 +++ /dev/null @@ -1,61 +0,0 @@ -$NetBSD: patch-XSA244,v 1.1 2017/10/17 08:42:30 bouyer Exp $ - -From: Andrew Cooper <andrew.cooper3@citrix.com> -Subject: [PATCH] x86/cpu: Fix IST handling during PCPU bringup - -Clear IST references in newly allocated IDTs. Nothing good will come of -having them set before the TSS is suitably constructed (although the chances -of the CPU surviving such an IST interrupt/exception is extremely slim). - -Uniformly set the IST references after the TSS is in place. This fixes an -issue on AMD hardware, where onlining a PCPU while PCPU0 is in HVM context -will cause IST_NONE to be copied into the new IDT, making that PCPU vulnerable -to privilege escalation from PV guests until it subsequently schedules an HVM -guest. - -This is XSA-244 - -Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com> -Reviewed-by: Jan Beulich <jbeulich@suse.com> ---- - xen/arch/x86/cpu/common.c | 5 +++++ - xen/arch/x86/smpboot.c | 3 +++ - 2 files changed, 8 insertions(+) - -diff --git a/xen/arch/x86/cpu/common.c b/xen/arch/x86/cpu/common.c -index 78f5667..6cf3628 100644 ---- xen/arch/x86/cpu/common.c.orig -+++ xen/arch/x86/cpu/common.c -@@ -640,6 +640,7 @@ void __init early_cpu_init(void) - * - Sets up TSS with stack pointers, including ISTs - * - Inserts TSS selector into regular and compat GDTs - * - Loads GDT, IDT, TR then null LDT -+ * - Sets up IST references in the IDT - */ - void load_system_tables(void) - { -@@ -702,6 +703,10 @@ void load_system_tables(void) - asm volatile ("ltr %w0" : : "rm" (TSS_ENTRY << 3) ); - asm volatile ("lldt %w0" : : "rm" (0) ); - -+ set_ist(&idt_tables[cpu][TRAP_double_fault], IST_DF); -+ set_ist(&idt_tables[cpu][TRAP_nmi], IST_NMI); -+ set_ist(&idt_tables[cpu][TRAP_machine_check], IST_MCE); -+ - /* - * Bottom-of-stack must be 16-byte aligned! - * -diff --git a/xen/arch/x86/smpboot.c b/xen/arch/x86/smpboot.c -index 3ca716c..1609b62 100644 ---- xen/arch/x86/smpboot.c.orig -+++ xen/arch/x86/smpboot.c -@@ -724,6 +724,9 @@ static int cpu_smpboot_alloc(unsigned int cpu) - if ( idt_tables[cpu] == NULL ) - goto oom; - memcpy(idt_tables[cpu], idt_table, IDT_ENTRIES * sizeof(idt_entry_t)); -+ set_ist(&idt_tables[cpu][TRAP_double_fault], IST_NONE); -+ set_ist(&idt_tables[cpu][TRAP_nmi], IST_NONE); -+ set_ist(&idt_tables[cpu][TRAP_machine_check], IST_NONE); - - for ( stub_page = 0, i = cpu & ~(STUBS_PER_PAGE - 1); - i < nr_cpu_ids && i <= (cpu | (STUBS_PER_PAGE - 1)); ++i ) diff --git a/sysutils/xenkernel48/patches/patch-XSA246 b/sysutils/xenkernel48/patches/patch-XSA246 deleted file mode 100644 index 4fedacc0c49..00000000000 --- a/sysutils/xenkernel48/patches/patch-XSA246 +++ /dev/null @@ -1,76 +0,0 @@ -$NetBSD: patch-XSA246,v 1.1 2017/12/15 14:02:15 bouyer Exp $ - -From: Julien Grall <julien.grall@linaro.org> -Subject: x86/pod: prevent infinite loop when shattering large pages - -When populating pages, the PoD may need to split large ones using -p2m_set_entry and request the caller to retry (see ept_get_entry for -instance). - -p2m_set_entry may fail to shatter if it is not possible to allocate -memory for the new page table. However, the error is not propagated -resulting to the callers to retry infinitely the PoD. - -Prevent the infinite loop by return false when it is not possible to -shatter the large mapping. - -This is XSA-246. - -Signed-off-by: Julien Grall <julien.grall@linaro.org> -Signed-off-by: Jan Beulich <jbeulich@suse.com> -Reviewed-by: George Dunlap <george.dunlap@citrix.com> - ---- xen/arch/x86/mm/p2m-pod.c.orig -+++ xen/arch/x86/mm/p2m-pod.c -@@ -1071,9 +1071,8 @@ p2m_pod_demand_populate(struct p2m_domai - * NOTE: In a fine-grained p2m locking scenario this operation - * may need to promote its locking from gfn->1g superpage - */ -- p2m_set_entry(p2m, gfn_aligned, INVALID_MFN, PAGE_ORDER_2M, -- p2m_populate_on_demand, p2m->default_access); -- return 0; -+ return p2m_set_entry(p2m, gfn_aligned, INVALID_MFN, PAGE_ORDER_2M, -+ p2m_populate_on_demand, p2m->default_access); - } - - /* Only reclaim if we're in actual need of more cache. */ -@@ -1104,8 +1103,12 @@ p2m_pod_demand_populate(struct p2m_domai - - gfn_aligned = (gfn >> order) << order; - -- p2m_set_entry(p2m, gfn_aligned, mfn, order, p2m_ram_rw, -- p2m->default_access); -+ if ( p2m_set_entry(p2m, gfn_aligned, mfn, order, p2m_ram_rw, -+ p2m->default_access) ) -+ { -+ p2m_pod_cache_add(p2m, p, order); -+ goto out_fail; -+ } - - for( i = 0; i < (1UL << order); i++ ) - { -@@ -1150,13 +1153,18 @@ remap_and_retry: - BUG_ON(order != PAGE_ORDER_2M); - pod_unlock(p2m); - -- /* Remap this 2-meg region in singleton chunks */ -- /* NOTE: In a p2m fine-grained lock scenario this might -- * need promoting the gfn lock from gfn->2M superpage */ -+ /* -+ * Remap this 2-meg region in singleton chunks. See the comment on the -+ * 1G page splitting path above for why a single call suffices. -+ * -+ * NOTE: In a p2m fine-grained lock scenario this might -+ * need promoting the gfn lock from gfn->2M superpage. -+ */ - gfn_aligned = (gfn>>order)<<order; -- for(i=0; i<(1<<order); i++) -- p2m_set_entry(p2m, gfn_aligned + i, INVALID_MFN, PAGE_ORDER_4K, -- p2m_populate_on_demand, p2m->default_access); -+ if ( p2m_set_entry(p2m, gfn_aligned, INVALID_MFN, PAGE_ORDER_4K, -+ p2m_populate_on_demand, p2m->default_access) ) -+ return -1; -+ - if ( tb_init_done ) - { - struct { diff --git a/sysutils/xenkernel48/patches/patch-XSA247 b/sysutils/xenkernel48/patches/patch-XSA247 deleted file mode 100644 index 248e2702a0d..00000000000 --- a/sysutils/xenkernel48/patches/patch-XSA247 +++ /dev/null @@ -1,287 +0,0 @@ -$NetBSD: patch-XSA247,v 1.1 2017/12/15 14:02:15 bouyer Exp $ - -From 0a004cf322940d99432b84284b22f3a9ea67a282 Mon Sep 17 00:00:00 2001 -From: George Dunlap <george.dunlap@citrix.com> -Date: Fri, 10 Nov 2017 16:53:54 +0000 -Subject: [PATCH 1/2] p2m: Always check to see if removing a p2m entry actually - worked - -The PoD zero-check functions speculatively remove memory from the p2m, -then check to see if it's completely zeroed, before putting it in the -cache. - -Unfortunately, the p2m_set_entry() calls may fail if the underlying -pagetable structure needs to change and the domain has exhausted its -p2m memory pool: for instance, if we're removing a 2MiB region out of -a 1GiB entry (in the p2m_pod_zero_check_superpage() case), or a 4k -region out of a 2MiB or larger entry (in the p2m_pod_zero_check() -case); and the return value is not checked. - -The underlying mfn will then be added into the PoD cache, and at some -point mapped into another location in the p2m. If the guest -afterwards ballons out this memory, it will be freed to the hypervisor -and potentially reused by another domain, in spite of the fact that -the original domain still has writable mappings to it. - -There are several places where p2m_set_entry() shouldn't be able to -fail, as it is guaranteed to write an entry of the same order that -succeeded before. Add a backstop of crashing the domain just in case, -and an ASSERT_UNREACHABLE() to flag up the broken assumption on debug -builds. - -While we're here, use PAGE_ORDER_2M rather than a magic constant. - -This is part of XSA-247. - -Reported-by: George Dunlap <george.dunlap.com> -Signed-off-by: George Dunlap <george.dunlap@citrix.com> -Reviewed-by: Jan Beulich <jbeulich@suse.com> ---- -v4: -- Removed some training whitespace -v3: -- Reformat reset clause to be more compact -- Make sure to set map[i] = NULL when unmapping in case we need to bail -v2: -- Crash a domain if a p2m_set_entry we think cannot fail fails anyway. ---- - xen/arch/x86/mm/p2m-pod.c | 77 +++++++++++++++++++++++++++++++++++++---------- - 1 file changed, 61 insertions(+), 16 deletions(-) - -diff --git a/xen/arch/x86/mm/p2m-pod.c b/xen/arch/x86/mm/p2m-pod.c -index 0e15290390..d73a86dde0 100644 ---- xen/arch/x86/mm/p2m-pod.c.orig -+++ xen/arch/x86/mm/p2m-pod.c -@@ -754,8 +754,10 @@ p2m_pod_zero_check_superpage(struct p2m_domain *p2m, unsigned long gfn) - } - - /* Try to remove the page, restoring old mapping if it fails. */ -- p2m_set_entry(p2m, gfn, INVALID_MFN, PAGE_ORDER_2M, -- p2m_populate_on_demand, p2m->default_access); -+ if ( p2m_set_entry(p2m, gfn, INVALID_MFN, PAGE_ORDER_2M, -+ p2m_populate_on_demand, p2m->default_access) ) -+ goto out; -+ - p2m_tlb_flush_sync(p2m); - - /* Make none of the MFNs are used elsewhere... for example, mapped -@@ -812,9 +814,18 @@ p2m_pod_zero_check_superpage(struct p2m_domain *p2m, unsigned long gfn) - ret = SUPERPAGE_PAGES; - - out_reset: -- if ( reset ) -- p2m_set_entry(p2m, gfn, mfn0, 9, type0, p2m->default_access); -- -+ /* -+ * This p2m_set_entry() call shouldn't be able to fail, since the same order -+ * on the same gfn succeeded above. If that turns out to be false, crashing -+ * the domain should be the safest way of making sure we don't leak memory. -+ */ -+ if ( reset && p2m_set_entry(p2m, gfn, mfn0, PAGE_ORDER_2M, -+ type0, p2m->default_access) ) -+ { -+ ASSERT_UNREACHABLE(); -+ domain_crash(d); -+ } -+ - out: - gfn_unlock(p2m, gfn, SUPERPAGE_ORDER); - return ret; -@@ -871,19 +882,30 @@ p2m_pod_zero_check(struct p2m_domain *p2m, unsigned long *gfns, int count) - } - - /* Try to remove the page, restoring old mapping if it fails. */ -- p2m_set_entry(p2m, gfns[i], INVALID_MFN, PAGE_ORDER_4K, -- p2m_populate_on_demand, p2m->default_access); -+ if ( p2m_set_entry(p2m, gfns[i], INVALID_MFN, PAGE_ORDER_4K, -+ p2m_populate_on_demand, p2m->default_access) ) -+ goto skip; - - /* See if the page was successfully unmapped. (Allow one refcount - * for being allocated to a domain.) */ - if ( (mfn_to_page(mfns[i])->count_info & PGC_count_mask) > 1 ) - { -+ /* -+ * If the previous p2m_set_entry call succeeded, this one shouldn't -+ * be able to fail. If it does, crashing the domain should be safe. -+ */ -+ if ( p2m_set_entry(p2m, gfns[i], mfns[i], PAGE_ORDER_4K, -+ types[i], p2m->default_access) ) -+ { -+ ASSERT_UNREACHABLE(); -+ domain_crash(d); -+ goto out_unmap; -+ } -+ -+ skip: - unmap_domain_page(map[i]); - map[i] = NULL; - -- p2m_set_entry(p2m, gfns[i], mfns[i], PAGE_ORDER_4K, -- types[i], p2m->default_access); -- - continue; - } - } -@@ -902,12 +924,25 @@ p2m_pod_zero_check(struct p2m_domain *p2m, unsigned long *gfns, int count) - - unmap_domain_page(map[i]); - -- /* See comment in p2m_pod_zero_check_superpage() re gnttab -- * check timing. */ -- if ( j < PAGE_SIZE/sizeof(*map[i]) ) -+ map[i] = NULL; -+ -+ /* -+ * See comment in p2m_pod_zero_check_superpage() re gnttab -+ * check timing. -+ */ -+ if ( j < (PAGE_SIZE / sizeof(*map[i])) ) - { -- p2m_set_entry(p2m, gfns[i], mfns[i], PAGE_ORDER_4K, -- types[i], p2m->default_access); -+ /* -+ * If the previous p2m_set_entry call succeeded, this one shouldn't -+ * be able to fail. If it does, crashing the domain should be safe. -+ */ -+ if ( p2m_set_entry(p2m, gfns[i], mfns[i], PAGE_ORDER_4K, -+ types[i], p2m->default_access) ) -+ { -+ ASSERT_UNREACHABLE(); -+ domain_crash(d); -+ goto out_unmap; -+ } - } - else - { -@@ -931,7 +966,17 @@ p2m_pod_zero_check(struct p2m_domain *p2m, unsigned long *gfns, int count) - p2m->pod.entry_count++; - } - } -- -+ -+ return; -+ -+out_unmap: -+ /* -+ * Something went wrong, probably crashing the domain. Unmap -+ * everything and return. -+ */ -+ for ( i = 0; i < count; i++ ) -+ if ( map[i] ) -+ unmap_domain_page(map[i]); - } - - #define POD_SWEEP_LIMIT 1024 --- -2.15.0 - -From f01b21460bdd5205e1a92552d37a276866f64f1f Mon Sep 17 00:00:00 2001 -From: George Dunlap <george.dunlap@citrix.com> -Date: Fri, 10 Nov 2017 16:53:55 +0000 -Subject: [PATCH 2/2] p2m: Check return value of p2m_set_entry() when - decreasing reservation - -If the entire range specified to p2m_pod_decrease_reservation() is marked -populate-on-demand, then it will make a single p2m_set_entry() call, -reducing its PoD entry count. - -Unfortunately, in the right circumstances, this p2m_set_entry() call -may fail. It that case, repeated calls to decrease_reservation() may -cause p2m->pod.entry_count to fall below zero, potentially tripping -over BUG_ON()s to the contrary. - -Instead, check to see if the entry succeeded, and return false if not. -The caller will then call guest_remove_page() on the gfns, which will -return -EINVAL upon finding no valid memory there to return. - -Unfortunately if the order > 0, the entry may have partially changed. -A domain_crash() is probably the safest thing in that case. - -Other p2m_set_entry() calls in the same function should be fine, -because they are writing the entry at its current order. Nonetheless, -check the return value and crash if our assumption turns otu to be -wrong. - -This is part of XSA-247. - -Reported-by: George Dunlap <george.dunlap.com> -Signed-off-by: George Dunlap <george.dunlap@citrix.com> -Reviewed-by: Jan Beulich <jbeulich@suse.com> ---- -v2: Crash the domain if we're not sure it's safe (or if we think it -can't happen) ---- - xen/arch/x86/mm/p2m-pod.c | 42 +++++++++++++++++++++++++++++++++--------- - 1 file changed, 33 insertions(+), 9 deletions(-) - -diff --git a/xen/arch/x86/mm/p2m-pod.c b/xen/arch/x86/mm/p2m-pod.c -index d73a86dde0..c750d0d8cc 100644 ---- xen/arch/x86/mm/p2m-pod.c.orig -+++ xen/arch/x86/mm/p2m-pod.c -@@ -557,11 +557,23 @@ p2m_pod_decrease_reservation(struct domain *d, - - if ( !nonpod ) - { -- /* All PoD: Mark the whole region invalid and tell caller -- * we're done. */ -- p2m_set_entry(p2m, gpfn, INVALID_MFN, order, p2m_invalid, -- p2m->default_access); -- p2m->pod.entry_count-=(1<<order); -+ /* -+ * All PoD: Mark the whole region invalid and tell caller -+ * we're done. -+ */ -+ if ( p2m_set_entry(p2m, gpfn, INVALID_MFN, order, p2m_invalid, -+ p2m->default_access) ) -+ { -+ /* -+ * If this fails, we can't tell how much of the range was changed. -+ * Best to crash the domain unless we're sure a partial change is -+ * impossible. -+ */ -+ if ( order != 0 ) -+ domain_crash(d); -+ goto out_unlock; -+ } -+ p2m->pod.entry_count -= 1UL << order; - BUG_ON(p2m->pod.entry_count < 0); - ret = 1; - goto out_entry_check; -@@ -602,8 +614,14 @@ p2m_pod_decrease_reservation(struct domain *d, - n = 1UL << cur_order; - if ( t == p2m_populate_on_demand ) - { -- p2m_set_entry(p2m, gpfn + i, INVALID_MFN, cur_order, -- p2m_invalid, p2m->default_access); -+ /* This shouldn't be able to fail */ -+ if ( p2m_set_entry(p2m, gpfn + i, INVALID_MFN, cur_order, -+ p2m_invalid, p2m->default_access) ) -+ { -+ ASSERT_UNREACHABLE(); -+ domain_crash(d); -+ goto out_unlock; -+ } - p2m->pod.entry_count -= n; - BUG_ON(p2m->pod.entry_count < 0); - pod -= n; -@@ -624,8 +642,14 @@ p2m_pod_decrease_reservation(struct domain *d, - - page = mfn_to_page(mfn); - -- p2m_set_entry(p2m, gpfn + i, INVALID_MFN, cur_order, -- p2m_invalid, p2m->default_access); -+ /* This shouldn't be able to fail */ -+ if ( p2m_set_entry(p2m, gpfn + i, INVALID_MFN, cur_order, -+ p2m_invalid, p2m->default_access) ) -+ { -+ ASSERT_UNREACHABLE(); -+ domain_crash(d); -+ goto out_unlock; -+ } - p2m_tlb_flush_sync(p2m); - for ( j = 0; j < n; ++j ) - set_gpfn_from_mfn(mfn_x(mfn), INVALID_M2P_ENTRY); --- -2.15.0 - diff --git a/sysutils/xenkernel48/patches/patch-XSA248 b/sysutils/xenkernel48/patches/patch-XSA248 deleted file mode 100644 index b0ccf377bb2..00000000000 --- a/sysutils/xenkernel48/patches/patch-XSA248 +++ /dev/null @@ -1,164 +0,0 @@ -$NetBSD: patch-XSA248,v 1.1 2017/12/15 14:02:15 bouyer Exp $ - -From: Jan Beulich <jbeulich@suse.com> -Subject: x86/mm: don't wrongly set page ownership - -PV domains can obtain mappings of any pages owned by the correct domain, -including ones that aren't actually assigned as "normal" RAM, but used -by Xen internally. At the moment such "internal" pages marked as owned -by a guest include pages used to track logdirty bits, as well as p2m -pages and the "unpaged pagetable" for HVM guests. Since the PV memory -management and shadow code conflict in their use of struct page_info -fields, and since shadow code is being used for log-dirty handling for -PV domains, pages coming from the shadow pool must, for PV domains, not -have the domain set as their owner. - -While the change could be done conditionally for just the PV case in -shadow code, do it unconditionally (and for consistency also for HAP), -just to be on the safe side. - -There's one special case though for shadow code: The page table used for -running a HVM guest in unpaged mode is subject to get_page() (in -set_shadow_status()) and hence must have its owner set. - -This is XSA-248. - -Signed-off-by: Jan Beulich <jbeulich@suse.com> -Reviewed-by: Tim Deegan <tim@xen.org> -Reviewed-by: George Dunlap <george.dunlap@citrix.com> - ---- xen/arch/x86/mm/hap/hap.c.orig -+++ xen/arch/x86/mm/hap/hap.c -@@ -283,8 +283,7 @@ static struct page_info *hap_alloc_p2m_p - { - d->arch.paging.hap.total_pages--; - d->arch.paging.hap.p2m_pages++; -- page_set_owner(pg, d); -- pg->count_info |= 1; -+ ASSERT(!page_get_owner(pg) && !(pg->count_info & PGC_count_mask)); - } - else if ( !d->arch.paging.p2m_alloc_failed ) - { -@@ -299,21 +298,23 @@ static struct page_info *hap_alloc_p2m_p - - static void hap_free_p2m_page(struct domain *d, struct page_info *pg) - { -+ struct domain *owner = page_get_owner(pg); -+ - /* This is called both from the p2m code (which never holds the - * paging lock) and the log-dirty code (which always does). */ - paging_lock_recursive(d); - -- ASSERT(page_get_owner(pg) == d); -- /* Should have just the one ref we gave it in alloc_p2m_page() */ -- if ( (pg->count_info & PGC_count_mask) != 1 ) { -- HAP_ERROR("Odd p2m page %p count c=%#lx t=%"PRtype_info"\n", -- pg, pg->count_info, pg->u.inuse.type_info); -+ /* Should still have no owner and count zero. */ -+ if ( owner || (pg->count_info & PGC_count_mask) ) -+ { -+ HAP_ERROR("d%d: Odd p2m page %"PRI_mfn" d=%d c=%lx t=%"PRtype_info"\n", -+ d->domain_id, mfn_x(page_to_mfn(pg)), -+ owner ? owner->domain_id : DOMID_INVALID, -+ pg->count_info, pg->u.inuse.type_info); - WARN(); -+ pg->count_info &= ~PGC_count_mask; -+ page_set_owner(pg, NULL); - } -- pg->count_info &= ~PGC_count_mask; -- /* Free should not decrement domain's total allocation, since -- * these pages were allocated without an owner. */ -- page_set_owner(pg, NULL); - d->arch.paging.hap.p2m_pages--; - d->arch.paging.hap.total_pages++; - hap_free(d, page_to_mfn(pg)); ---- xen/arch/x86/mm/shadow/common.c.orig -+++ xen/arch/x86/mm/shadow/common.c -@@ -1573,32 +1573,29 @@ shadow_alloc_p2m_page(struct domain *d) - pg = mfn_to_page(shadow_alloc(d, SH_type_p2m_table, 0)); - d->arch.paging.shadow.p2m_pages++; - d->arch.paging.shadow.total_pages--; -+ ASSERT(!page_get_owner(pg) && !(pg->count_info & PGC_count_mask)); - - paging_unlock(d); - -- /* Unlike shadow pages, mark p2m pages as owned by the domain. -- * Marking the domain as the owner would normally allow the guest to -- * create mappings of these pages, but these p2m pages will never be -- * in the domain's guest-physical address space, and so that is not -- * believed to be a concern. */ -- page_set_owner(pg, d); -- pg->count_info |= 1; - return pg; - } - - static void - shadow_free_p2m_page(struct domain *d, struct page_info *pg) - { -- ASSERT(page_get_owner(pg) == d); -- /* Should have just the one ref we gave it in alloc_p2m_page() */ -- if ( (pg->count_info & PGC_count_mask) != 1 ) -+ struct domain *owner = page_get_owner(pg); -+ -+ /* Should still have no owner and count zero. */ -+ if ( owner || (pg->count_info & PGC_count_mask) ) - { -- SHADOW_ERROR("Odd p2m page count c=%#lx t=%"PRtype_info"\n", -+ SHADOW_ERROR("d%d: Odd p2m page %"PRI_mfn" d=%d c=%lx t=%"PRtype_info"\n", -+ d->domain_id, mfn_x(page_to_mfn(pg)), -+ owner ? owner->domain_id : DOMID_INVALID, - pg->count_info, pg->u.inuse.type_info); -+ pg->count_info &= ~PGC_count_mask; -+ page_set_owner(pg, NULL); - } -- pg->count_info &= ~PGC_count_mask; - pg->u.sh.type = SH_type_p2m_table; /* p2m code reuses type-info */ -- page_set_owner(pg, NULL); - - /* This is called both from the p2m code (which never holds the - * paging lock) and the log-dirty code (which always does). */ -@@ -3216,7 +3213,9 @@ int shadow_enable(struct domain *d, u32 - | _PAGE_PRESENT | _PAGE_RW | _PAGE_USER - | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_PSE); - unmap_domain_page(e); -+ pg->count_info = 1; - pg->u.inuse.type_info = PGT_l2_page_table | 1 | PGT_validated; -+ page_set_owner(pg, d); - } - - paging_lock(d); -@@ -3254,7 +3253,11 @@ int shadow_enable(struct domain *d, u32 - if ( rv != 0 && !pagetable_is_null(p2m_get_pagetable(p2m)) ) - p2m_teardown(p2m); - if ( rv != 0 && pg != NULL ) -+ { -+ pg->count_info &= ~PGC_count_mask; -+ page_set_owner(pg, NULL); - shadow_free_p2m_page(d, pg); -+ } - domain_unpause(d); - return rv; - } -@@ -3363,7 +3366,22 @@ out: - - /* Must be called outside the lock */ - if ( unpaged_pagetable ) -+ { -+ if ( page_get_owner(unpaged_pagetable) == d && -+ (unpaged_pagetable->count_info & PGC_count_mask) == 1 ) -+ { -+ unpaged_pagetable->count_info &= ~PGC_count_mask; -+ page_set_owner(unpaged_pagetable, NULL); -+ } -+ /* Complain here in cases where shadow_free_p2m_page() won't. */ -+ else if ( !page_get_owner(unpaged_pagetable) && -+ !(unpaged_pagetable->count_info & PGC_count_mask) ) -+ SHADOW_ERROR("d%d: Odd unpaged pt %"PRI_mfn" c=%lx t=%"PRtype_info"\n", -+ d->domain_id, mfn_x(page_to_mfn(unpaged_pagetable)), -+ unpaged_pagetable->count_info, -+ unpaged_pagetable->u.inuse.type_info); - shadow_free_p2m_page(d, unpaged_pagetable); -+ } - } - - void shadow_final_teardown(struct domain *d) diff --git a/sysutils/xenkernel48/patches/patch-XSA249 b/sysutils/xenkernel48/patches/patch-XSA249 deleted file mode 100644 index a0780ca267c..00000000000 --- a/sysutils/xenkernel48/patches/patch-XSA249 +++ /dev/null @@ -1,44 +0,0 @@ -$NetBSD: patch-XSA249,v 1.1 2017/12/15 14:02:15 bouyer Exp $ - -From: Jan Beulich <jbeulich@suse.com> -Subject: x86/shadow: fix refcount overflow check - -Commit c385d27079 ("x86 shadow: for multi-page shadows, explicitly track -the first page") reduced the refcount width to 25, without adjusting the -overflow check. Eliminate the disconnect by using a manifest constant. - -Interestingly, up to commit 047782fa01 ("Out-of-sync L1 shadows: OOS -snapshot") the refcount was 27 bits wide, yet the check was already -using 26. - -This is XSA-249. - -Signed-off-by: Jan Beulich <jbeulich@suse.com> -Reviewed-by: George Dunlap <george.dunlap@citrix.com> -Reviewed-by: Tim Deegan <tim@xen.org> ---- -v2: Simplify expression back to the style it was. - ---- xen/arch/x86/mm/shadow/private.h.orig -+++ xen/arch/x86/mm/shadow/private.h -@@ -529,7 +529,7 @@ static inline int sh_get_ref(struct doma - x = sp->u.sh.count; - nx = x + 1; - -- if ( unlikely(nx >= 1U<<26) ) -+ if ( unlikely(nx >= (1U << PAGE_SH_REFCOUNT_WIDTH)) ) - { - SHADOW_PRINTK("shadow ref overflow, gmfn=%lx smfn=%lx\n", - __backpointer(sp), mfn_x(smfn)); ---- xen/include/asm-x86/mm.h.orig -+++ xen/include/asm-x86/mm.h -@@ -82,7 +82,8 @@ struct page_info - unsigned long type:5; /* What kind of shadow is this? */ - unsigned long pinned:1; /* Is the shadow pinned? */ - unsigned long head:1; /* Is this the first page of the shadow? */ -- unsigned long count:25; /* Reference count */ -+#define PAGE_SH_REFCOUNT_WIDTH 25 -+ unsigned long count:PAGE_SH_REFCOUNT_WIDTH; /* Reference count */ - } sh; - - /* Page is on a free list: ((count_info & PGC_count_mask) == 0). */ diff --git a/sysutils/xenkernel48/patches/patch-XSA250 b/sysutils/xenkernel48/patches/patch-XSA250 deleted file mode 100644 index 0ca2deeda00..00000000000 --- a/sysutils/xenkernel48/patches/patch-XSA250 +++ /dev/null @@ -1,69 +0,0 @@ -$NetBSD: patch-XSA250,v 1.1 2017/12/15 14:02:15 bouyer Exp $ - -From: Jan Beulich <jbeulich@suse.com> -Subject: x86/shadow: fix ref-counting error handling - -The old-Linux handling in shadow_set_l4e() mistakenly ORed together the -results of sh_get_ref() and sh_pin(). As the latter failing is not a -correctness problem, simply ignore its return value. - -In sh_set_toplevel_shadow() a failing sh_get_ref() must not be -accompanied by installing the entry, despite the domain being crashed. - -This is XSA-250. - -Signed-off-by: Jan Beulich <jbeulich@suse.com> -Reviewed-by: Tim Deegan <tim@xen.org> - ---- xen/arch/x86/mm/shadow/multi.c.orig -+++ xen/arch/x86/mm/shadow/multi.c -@@ -923,7 +923,7 @@ static int shadow_set_l4e(struct domain - shadow_l4e_t new_sl4e, - mfn_t sl4mfn) - { -- int flags = 0, ok; -+ int flags = 0; - shadow_l4e_t old_sl4e; - paddr_t paddr; - ASSERT(sl4e != NULL); -@@ -938,15 +938,16 @@ static int shadow_set_l4e(struct domain - { - /* About to install a new reference */ - mfn_t sl3mfn = shadow_l4e_get_mfn(new_sl4e); -- ok = sh_get_ref(d, sl3mfn, paddr); -- /* Are we pinning l3 shadows to handle wierd linux behaviour? */ -- if ( sh_type_is_pinnable(d, SH_type_l3_64_shadow) ) -- ok |= sh_pin(d, sl3mfn); -- if ( !ok ) -+ -+ if ( !sh_get_ref(d, sl3mfn, paddr) ) - { - domain_crash(d); - return SHADOW_SET_ERROR; - } -+ -+ /* Are we pinning l3 shadows to handle weird Linux behaviour? */ -+ if ( sh_type_is_pinnable(d, SH_type_l3_64_shadow) ) -+ sh_pin(d, sl3mfn); - } - - /* Write the new entry */ -@@ -3965,14 +3966,15 @@ sh_set_toplevel_shadow(struct vcpu *v, - - /* Take a ref to this page: it will be released in sh_detach_old_tables() - * or the next call to set_toplevel_shadow() */ -- if ( !sh_get_ref(d, smfn, 0) ) -+ if ( sh_get_ref(d, smfn, 0) ) -+ new_entry = pagetable_from_mfn(smfn); -+ else - { - SHADOW_ERROR("can't install %#lx as toplevel shadow\n", mfn_x(smfn)); - domain_crash(d); -+ new_entry = pagetable_null(); - } - -- new_entry = pagetable_from_mfn(smfn); -- - install_new_entry: - /* Done. Install it */ - SHADOW_PRINTK("%u/%u [%u] gmfn %#"PRI_mfn" smfn %#"PRI_mfn"\n", diff --git a/sysutils/xenkernel48/patches/patch-XSA251 b/sysutils/xenkernel48/patches/patch-XSA251 deleted file mode 100644 index 929c0901897..00000000000 --- a/sysutils/xenkernel48/patches/patch-XSA251 +++ /dev/null @@ -1,23 +0,0 @@ -$NetBSD: patch-XSA251,v 1.1 2017/12/15 14:02:15 bouyer Exp $ - -From: Jan Beulich <jbeulich@suse.com> -Subject: x86/paging: don't unconditionally BUG() on finding SHARED_M2P_ENTRY - -PV guests can fully control the values written into the P2M. - -This is XSA-251. - -Signed-off-by: Jan Beulich <jbeulich@suse.com> -Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com> - ---- xen/arch/x86/mm/paging.c.orig -+++ xen/arch/x86/mm/paging.c -@@ -276,7 +276,7 @@ void paging_mark_pfn_dirty(struct domain - return; - - /* Shared MFNs should NEVER be marked dirty */ -- BUG_ON(SHARED_M2P(pfn)); -+ BUG_ON(paging_mode_translate(d) && SHARED_M2P(pfn)); - - /* - * Values with the MSB set denote MFNs that aren't really part of the diff --git a/sysutils/xenkernel48/patches/patch-XSA254-1 b/sysutils/xenkernel48/patches/patch-XSA254-1 deleted file mode 100644 index 1448bf48457..00000000000 --- a/sysutils/xenkernel48/patches/patch-XSA254-1 +++ /dev/null @@ -1,389 +0,0 @@ -$NetBSD: patch-XSA254-1,v 1.1 2018/01/18 10:28:13 bouyer Exp $ - -From: Andrew Cooper <andrew.cooper3@citrix.com> -Date: Wed, 17 Jan 2018 16:14:16 +0000 (+0100) -Subject: x86/entry: Remove support for partial cpu_user_regs frames -X-Git-Url: http://xenbits.xen.org/gitweb/?p=xen.git;a=commitdiff_plain;h=a7cf0a3b818377a8a49baed3606bfa2f214cd645;hp=40c02dd27a3e350197ef438b1ea6ad21f275c1c5 - -x86/entry: Remove support for partial cpu_user_regs frames - -Save all GPRs on entry to Xen. - -The entry_int82() path is via a DPL1 gate, only usable by 32bit PV guests, so -can get away with only saving the 32bit registers. All other entrypoints can -be reached from 32 or 64bit contexts. - -This is part of XSA-254. - -Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com> -Reviewed-by: Wei Liu <wei.liu2@citrix.com> -Acked-by: Jan Beulich <jbeulich@suse.com> -master commit: f9eb74789af77e985ae653193f3622263499f674 -master date: 2018-01-05 19:57:07 +0000 ---- - -diff --git a/tools/tests/x86_emulator/x86_emulate.c b/tools/tests/x86_emulator/x86_emulate.c -index 19d8385..127a926 100644 ---- tools/tests/x86_emulator/x86_emulate.c.orig -+++ tools/tests/x86_emulator/x86_emulate.c -@@ -33,7 +33,6 @@ typedef bool bool_t; - #define MASK_INSR(v, m) (((v) * ((m) & -(m))) & (m)) - - #define cpu_has_amd_erratum(nr) 0 --#define mark_regs_dirty(r) ((void)(r)) - - /* For generic assembly code: use macros to define operation/operand sizes. */ - #ifdef __i386__ -diff --git a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c -index c8a303d..747cf65 100644 ---- xen/arch/x86/domain.c.orig -+++ xen/arch/x86/domain.c -@@ -148,7 +148,6 @@ static void noreturn continue_idle_domain(struct vcpu *v) - static void noreturn continue_nonidle_domain(struct vcpu *v) - { - check_wakeup_from_wait(); -- mark_regs_dirty(guest_cpu_user_regs()); - reset_stack_and_jump(ret_from_intr); - } - -diff --git a/xen/arch/x86/traps.c b/xen/arch/x86/traps.c -index 249932a..f4bf8b5 100644 ---- xen/arch/x86/traps.c.orig -+++ xen/arch/x86/traps.c -@@ -3049,7 +3049,6 @@ static int emulate_privileged_op(struct cpu_user_regs *regs) - goto fail; - if ( admin_io_okay(port, op_bytes, currd) ) - { -- mark_regs_dirty(regs); - io_emul(regs); - } - else -@@ -3079,7 +3078,6 @@ static int emulate_privileged_op(struct cpu_user_regs *regs) - goto fail; - if ( admin_io_okay(port, op_bytes, currd) ) - { -- mark_regs_dirty(regs); - io_emul(regs); - if ( (op_bytes == 1) && pv_post_outb_hook ) - pv_post_outb_hook(port, regs->eax); -diff --git a/xen/arch/x86/x86_64/compat/entry.S b/xen/arch/x86/x86_64/compat/entry.S -index 474ffbc..df693c2 100644 ---- xen/arch/x86/x86_64/compat/entry.S.orig -+++ xen/arch/x86/x86_64/compat/entry.S -@@ -15,7 +15,8 @@ - ENTRY(compat_hypercall) - ASM_CLAC - pushq $0 -- SAVE_VOLATILE type=TRAP_syscall compat=1 -+ movl $TRAP_syscall, 4(%rsp) -+ SAVE_ALL compat=1 /* DPL1 gate, restricted to 32bit PV guests only. */ - CR4_PV32_RESTORE - - cmpb $0,untrusted_msi(%rip) -@@ -66,7 +67,6 @@ compat_test_guest_events: - /* %rbx: struct vcpu */ - compat_process_softirqs: - sti -- andl $~TRAP_regs_partial,UREGS_entry_vector(%rsp) - call do_softirq - jmp compat_test_all_events - -@@ -203,7 +203,8 @@ ENTRY(cstar_enter) - pushq $FLAT_USER_CS32 - pushq %rcx - pushq $0 -- SAVE_VOLATILE TRAP_syscall -+ movl $TRAP_syscall, 4(%rsp) -+ SAVE_ALL - GET_CURRENT(bx) - movq VCPU_domain(%rbx),%rcx - cmpb $0,DOMAIN_is_32bit_pv(%rcx) -diff --git a/xen/arch/x86/x86_64/entry.S b/xen/arch/x86/x86_64/entry.S -index 85f1a4b..ac9ab4c 100644 ---- xen/arch/x86/x86_64/entry.S.orig -+++ xen/arch/x86/x86_64/entry.S -@@ -97,7 +97,8 @@ ENTRY(lstar_enter) - pushq $FLAT_KERNEL_CS64 - pushq %rcx - pushq $0 -- SAVE_VOLATILE TRAP_syscall -+ movl $TRAP_syscall, 4(%rsp) -+ SAVE_ALL - GET_CURRENT(bx) - testb $TF_kernel_mode,VCPU_thread_flags(%rbx) - jz switch_to_kernel -@@ -139,7 +140,6 @@ test_guest_events: - /* %rbx: struct vcpu */ - process_softirqs: - sti -- SAVE_PRESERVED - call do_softirq - jmp test_all_events - -@@ -189,7 +189,8 @@ GLOBAL(sysenter_eflags_saved) - pushq $3 /* ring 3 null cs */ - pushq $0 /* null rip */ - pushq $0 -- SAVE_VOLATILE TRAP_syscall -+ movl $TRAP_syscall, 4(%rsp) -+ SAVE_ALL - GET_CURRENT(bx) - cmpb $0,VCPU_sysenter_disables_events(%rbx) - movq VCPU_sysenter_addr(%rbx),%rax -@@ -206,7 +207,6 @@ UNLIKELY_END(sysenter_nt_set) - leal (,%rcx,TBF_INTERRUPT),%ecx - UNLIKELY_START(z, sysenter_gpf) - movq VCPU_trap_ctxt(%rbx),%rsi -- SAVE_PRESERVED - movl $TRAP_gp_fault,UREGS_entry_vector(%rsp) - movl %eax,TRAPBOUNCE_error_code(%rdx) - movq TRAP_gp_fault * TRAPINFO_sizeof + TRAPINFO_eip(%rsi),%rax -@@ -224,7 +224,8 @@ UNLIKELY_END(sysenter_gpf) - ENTRY(int80_direct_trap) - ASM_CLAC - pushq $0 -- SAVE_VOLATILE 0x80 -+ movl $0x80, 4(%rsp) -+ SAVE_ALL - - cmpb $0,untrusted_msi(%rip) - UNLIKELY_START(ne, msi_check) -@@ -252,7 +253,6 @@ int80_slow_path: - * IDT entry with DPL==0. - */ - movl $((0x80 << 3) | X86_XEC_IDT),UREGS_error_code(%rsp) -- SAVE_PRESERVED - movl $TRAP_gp_fault,UREGS_entry_vector(%rsp) - /* A GPF wouldn't have incremented the instruction pointer. */ - subq $2,UREGS_rip(%rsp) -diff --git a/xen/arch/x86/x86_64/traps.c b/xen/arch/x86/x86_64/traps.c -index a9b0282..df4ac81 100644 -diff --git a/xen/arch/x86/x86_emulate.c b/xen/arch/x86/x86_emulate.c ---- xen/arch/x86/x86_64/traps.c.orig 2017-09-06 12:26:35.000000000 +0200 -+++ xen/arch/x86/x86_64/traps.c 2018-01-17 20:50:17.000000000 +0100 -@@ -66,15 +66,10 @@ - regs->rbp, regs->rsp, regs->r8); - printk("r9: %016lx r10: %016lx r11: %016lx\n", - regs->r9, regs->r10, regs->r11); -- if ( !(regs->entry_vector & TRAP_regs_partial) ) -- { -- printk("r12: %016lx r13: %016lx r14: %016lx\n", -- regs->r12, regs->r13, regs->r14); -- printk("r15: %016lx cr0: %016lx cr4: %016lx\n", -- regs->r15, crs[0], crs[4]); -- } -- else -- printk("cr0: %016lx cr4: %016lx\n", crs[0], crs[4]); -+ printk("r12: %016lx r13: %016lx r14: %016lx\n", -+ regs->r12, regs->r13, regs->r14); -+ printk("r15: %016lx cr0: %016lx cr4: %016lx\n", -+ regs->r15, crs[0], crs[4]); - printk("cr3: %016lx cr2: %016lx\n", crs[3], crs[2]); - printk("ds: %04x es: %04x fs: %04x gs: %04x " - "ss: %04x cs: %04x\n", -index f52f543..c1e2d54 100644 ---- xen/arch/x86/x86_emulate.c.orig -+++ xen/arch/x86/x86_emulate.c -@@ -11,7 +11,6 @@ - - #include <xen/domain_page.h> - #include <asm/x86_emulate.h> --#include <asm/asm_defns.h> /* mark_regs_dirty() */ - #include <asm/processor.h> /* current_cpu_info */ - #include <asm/xstate.h> - #include <asm/amd.h> /* cpu_has_amd_erratum() */ -diff --git a/xen/arch/x86/x86_emulate/x86_emulate.c b/xen/arch/x86/x86_emulate/x86_emulate.c -index c4d282a..9851416 100644 ---- xen/arch/x86/x86_emulate/x86_emulate.c.orig -+++ xen/arch/x86/x86_emulate/x86_emulate.c -@@ -1559,10 +1559,10 @@ decode_register( - case 9: p = ®s->r9; break; - case 10: p = ®s->r10; break; - case 11: p = ®s->r11; break; -- case 12: mark_regs_dirty(regs); p = ®s->r12; break; -- case 13: mark_regs_dirty(regs); p = ®s->r13; break; -- case 14: mark_regs_dirty(regs); p = ®s->r14; break; -- case 15: mark_regs_dirty(regs); p = ®s->r15; break; -+ case 12: p = ®s->r12; break; -+ case 13: p = ®s->r13; break; -+ case 14: p = ®s->r14; break; -+ case 15: p = ®s->r15; break; - #endif - default: BUG(); p = NULL; break; - } -diff --git a/xen/common/wait.c b/xen/common/wait.c -index 4ac98c0..398f653 100644 ---- xen/common/wait.c.orig -+++ xen/common/wait.c -@@ -128,7 +128,6 @@ static void __prepare_to_wait(struct waitqueue_vcpu *wqv) - unsigned long dummy; - u32 entry_vector = cpu_info->guest_cpu_user_regs.entry_vector; - -- cpu_info->guest_cpu_user_regs.entry_vector &= ~TRAP_regs_partial; - ASSERT(wqv->esp == 0); - - /* Save current VCPU affinity; force wakeup on *this* CPU only. */ -diff --git a/xen/include/asm-x86/asm_defns.h b/xen/include/asm-x86/asm_defns.h -index f1c6fa1..99cb337 100644 ---- xen/include/asm-x86/asm_defns.h.orig -+++ xen/include/asm-x86/asm_defns.h -@@ -17,15 +17,6 @@ - void ret_from_intr(void); - #endif - --#ifdef CONFIG_FRAME_POINTER --/* Indicate special exception stack frame by inverting the frame pointer. */ --#define SETUP_EXCEPTION_FRAME_POINTER(offs) \ -- leaq offs(%rsp),%rbp; \ -- notq %rbp --#else --#define SETUP_EXCEPTION_FRAME_POINTER(offs) --#endif -- - #ifndef NDEBUG - #define ASSERT_INTERRUPT_STATUS(x, msg) \ - pushf; \ -@@ -42,31 +33,6 @@ void ret_from_intr(void); - #define ASSERT_INTERRUPTS_DISABLED \ - ASSERT_INTERRUPT_STATUS(z, "INTERRUPTS DISABLED") - --/* -- * This flag is set in an exception frame when registers R12-R15 did not get -- * saved. -- */ --#define _TRAP_regs_partial 16 --#define TRAP_regs_partial (1 << _TRAP_regs_partial) --/* -- * This flag gets set in an exception frame when registers R12-R15 possibly -- * get modified from their originally saved values and hence need to be -- * restored even if the normal call flow would restore register values. -- * -- * The flag being set implies _TRAP_regs_partial to be unset. Restoring -- * R12-R15 thus is -- * - required when this flag is set, -- * - safe when _TRAP_regs_partial is unset. -- */ --#define _TRAP_regs_dirty 17 --#define TRAP_regs_dirty (1 << _TRAP_regs_dirty) -- --#define mark_regs_dirty(r) ({ \ -- struct cpu_user_regs *r__ = (r); \ -- ASSERT(!((r__)->entry_vector & TRAP_regs_partial)); \ -- r__->entry_vector |= TRAP_regs_dirty; \ --}) -- - #ifdef __ASSEMBLY__ - # define _ASM_EX(p) p-. - #else -@@ -236,7 +202,7 @@ static always_inline void stac(void) - #endif - - #ifdef __ASSEMBLY__ --.macro SAVE_ALL op -+.macro SAVE_ALL op, compat=0 - .ifeqs "\op", "CLAC" - ASM_CLAC - .else -@@ -255,40 +221,6 @@ static always_inline void stac(void) - movq %rdx,UREGS_rdx(%rsp) - movq %rcx,UREGS_rcx(%rsp) - movq %rax,UREGS_rax(%rsp) -- movq %r8,UREGS_r8(%rsp) -- movq %r9,UREGS_r9(%rsp) -- movq %r10,UREGS_r10(%rsp) -- movq %r11,UREGS_r11(%rsp) -- movq %rbx,UREGS_rbx(%rsp) -- movq %rbp,UREGS_rbp(%rsp) -- SETUP_EXCEPTION_FRAME_POINTER(UREGS_rbp) -- movq %r12,UREGS_r12(%rsp) -- movq %r13,UREGS_r13(%rsp) -- movq %r14,UREGS_r14(%rsp) -- movq %r15,UREGS_r15(%rsp) --.endm -- --/* -- * Save all registers not preserved by C code or used in entry/exit code. Mark -- * the frame as partial. -- * -- * @type: exception type -- * @compat: R8-R15 don't need saving, and the frame nevertheless is complete -- */ --.macro SAVE_VOLATILE type compat=0 --.if \compat -- movl $\type,UREGS_entry_vector-UREGS_error_code(%rsp) --.else -- movl $\type|TRAP_regs_partial,\ -- UREGS_entry_vector-UREGS_error_code(%rsp) --.endif -- addq $-(UREGS_error_code-UREGS_r15),%rsp -- cld -- movq %rdi,UREGS_rdi(%rsp) -- movq %rsi,UREGS_rsi(%rsp) -- movq %rdx,UREGS_rdx(%rsp) -- movq %rcx,UREGS_rcx(%rsp) -- movq %rax,UREGS_rax(%rsp) - .if !\compat - movq %r8,UREGS_r8(%rsp) - movq %r9,UREGS_r9(%rsp) -@@ -297,20 +229,17 @@ static always_inline void stac(void) - .endif - movq %rbx,UREGS_rbx(%rsp) - movq %rbp,UREGS_rbp(%rsp) -- SETUP_EXCEPTION_FRAME_POINTER(UREGS_rbp) --.endm -- --/* -- * Complete a frame potentially only partially saved. -- */ --.macro SAVE_PRESERVED -- btrl $_TRAP_regs_partial,UREGS_entry_vector(%rsp) -- jnc 987f -+#ifdef CONFIG_FRAME_POINTER -+/* Indicate special exception stack frame by inverting the frame pointer. */ -+ leaq UREGS_rbp(%rsp), %rbp -+ notq %rbp -+#endif -+.if !\compat - movq %r12,UREGS_r12(%rsp) - movq %r13,UREGS_r13(%rsp) - movq %r14,UREGS_r14(%rsp) - movq %r15,UREGS_r15(%rsp) --987: -+.endif - .endm - - #define LOAD_ONE_REG(reg, compat) \ -@@ -351,33 +280,13 @@ static always_inline void stac(void) - * @compat: R8-R15 don't need reloading - */ - .macro RESTORE_ALL adj=0 compat=0 --.if !\compat -- testl $TRAP_regs_dirty,UREGS_entry_vector(%rsp) --.endif - LOAD_C_CLOBBERED \compat - .if !\compat -- jz 987f - movq UREGS_r15(%rsp),%r15 - movq UREGS_r14(%rsp),%r14 - movq UREGS_r13(%rsp),%r13 - movq UREGS_r12(%rsp),%r12 --#ifndef NDEBUG -- .subsection 1 --987: testl $TRAP_regs_partial,UREGS_entry_vector(%rsp) -- jnz 987f -- cmpq UREGS_r15(%rsp),%r15 -- jne 789f -- cmpq UREGS_r14(%rsp),%r14 -- jne 789f -- cmpq UREGS_r13(%rsp),%r13 -- jne 789f -- cmpq UREGS_r12(%rsp),%r12 -- je 987f --789: BUG /* Corruption of partial register state. */ -- .subsection 0 --#endif - .endif --987: - LOAD_ONE_REG(bp, \compat) - LOAD_ONE_REG(bx, \compat) - subq $-(UREGS_error_code-UREGS_r15+\adj), %rsp diff --git a/sysutils/xenkernel48/patches/patch-XSA254-2 b/sysutils/xenkernel48/patches/patch-XSA254-2 deleted file mode 100644 index 06a1f08957b..00000000000 --- a/sysutils/xenkernel48/patches/patch-XSA254-2 +++ /dev/null @@ -1,44 +0,0 @@ -$NetBSD: patch-XSA254-2,v 1.1 2018/01/18 10:28:13 bouyer Exp $ - -From: Andrew Cooper <andrew.cooper3@citrix.com> -Date: Wed, 17 Jan 2018 16:15:25 +0000 (+0100) -Subject: x86/mm: Always set _PAGE_ACCESSED on L4e updates -X-Git-Url: http://xenbits.xen.org/gitweb/?p=xen.git;a=commitdiff_plain;h=049e2f45bfa488967494466ec6506c3ecae5fe0e;hp=49a44f089c59c326828b8aed39bee9743f5802fb - -x86/mm: Always set _PAGE_ACCESSED on L4e updates - -Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com> -Reviewed-by: Jan Beulich <jbeulich@suse.com> -master commit: bd61fe94bee0556bc2f64999a4a8315b93f90f21 -master date: 2018-01-15 13:53:16 +0000 ---- - -diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c -index be51d16..c22455d 100644 ---- xen/arch/x86/mm.c.orig -+++ xen/arch/x86/mm.c -@@ -1297,11 +1297,23 @@ get_page_from_l4e( - _PAGE_USER|_PAGE_RW); \ - } while ( 0 ) - -+/* -+ * When shadowing an L4 behind the guests back (e.g. for per-pcpu -+ * purposes), we cannot efficiently sync access bit updates from hardware -+ * (on the shadow tables) back into the guest view. -+ * -+ * We therefore unconditionally set _PAGE_ACCESSED even in the guests -+ * view. This will appear to the guest as a CPU which proactively pulls -+ * all valid L4e's into its TLB, which is compatible with the x86 ABI. -+ * -+ * At the time of writing, all PV guests set the access bit anyway, so -+ * this is no actual change in their behaviour. -+ */ - #define adjust_guest_l4e(pl4e, d) \ - do { \ - if ( likely(l4e_get_flags((pl4e)) & _PAGE_PRESENT) && \ - likely(!is_pv_32bit_domain(d)) ) \ -- l4e_add_flags((pl4e), _PAGE_USER); \ -+ l4e_add_flags((pl4e), _PAGE_USER | _PAGE_ACCESSED); \ - } while ( 0 ) - - #define unadjust_guest_l3e(pl3e, d) \ diff --git a/sysutils/xenkernel48/patches/patch-XSA254-3 b/sysutils/xenkernel48/patches/patch-XSA254-3 deleted file mode 100644 index a922b876ae1..00000000000 --- a/sysutils/xenkernel48/patches/patch-XSA254-3 +++ /dev/null @@ -1,758 +0,0 @@ -$NetBSD: patch-XSA254-3,v 1.1 2018/01/18 10:28:13 bouyer Exp $ - -From 1ba477bde737bf9b28cc455bef1e9a6bc76d66fc Mon Sep 17 00:00:00 2001 -From: Jan Beulich <jbeulich@suse.com> -Date: Wed, 17 Jan 2018 17:16:28 +0100 -Subject: [PATCH] x86: Meltdown band-aid against malicious 64-bit PV guests - -This is a very simplistic change limiting the amount of memory a running -64-bit PV guest has mapped (and hence available for attacking): Only the -mappings of stack, IDT, and TSS are being cloned from the direct map -into per-CPU page tables. Guest controlled parts of the page tables are -being copied into those per-CPU page tables upon entry into the guest. -Cross-vCPU synchronization of top level page table entry changes is -being effected by forcing other active vCPU-s of the guest into the -hypervisor. - -The change to context_switch() isn't strictly necessary, but there's no -reason to keep switching page tables once a PV guest is being scheduled -out. - -This isn't providing full isolation yet, but it should be covering all -pieces of information exposure of which would otherwise require an XSA. - -There is certainly much room for improvement, especially of performance, -here - first and foremost suppressing all the negative effects on AMD -systems. But in the interest of backportability (including to really old -hypervisors, which may not even have alternative patching) any such is -being left out here. - -Signed-off-by: Jan Beulich <jbeulich@suse.com> -Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com> -master commit: 5784de3e2067ed73efc2fe42e62831e8ae7f46c4 -master date: 2018-01-16 17:49:03 +0100 ---- - xen/arch/x86/domain.c | 5 + - xen/arch/x86/mm.c | 17 ++++ - xen/arch/x86/smpboot.c | 198 +++++++++++++++++++++++++++++++++++++ - xen/arch/x86/x86_64/asm-offsets.c | 2 + - xen/arch/x86/x86_64/compat/entry.S | 11 +++ - xen/arch/x86/x86_64/entry.S | 149 +++++++++++++++++++++++++++- - xen/include/asm-x86/asm_defns.h | 30 ++++++ - xen/include/asm-x86/current.h | 12 +++ - xen/include/asm-x86/processor.h | 1 + - xen/include/asm-x86/x86_64/page.h | 5 +- - 10 files changed, 424 insertions(+), 6 deletions(-) - -diff --git a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c -index 747cf65..bf3590d 100644 ---- xen/arch/x86/domain.c.orig -+++ xen/arch/x86/domain.c -@@ -1951,6 +1951,9 @@ static void paravirt_ctxt_switch_to(struct vcpu *v) - - switch_kernel_stack(v); - -+ this_cpu(root_pgt)[root_table_offset(PERDOMAIN_VIRT_START)] = -+ l4e_from_page(v->domain->arch.perdomain_l3_pg, __PAGE_HYPERVISOR_RW); -+ - cr4 = pv_guest_cr4_to_real_cr4(v); - if ( unlikely(cr4 != read_cr4()) ) - write_cr4(cr4); -@@ -2119,6 +2122,8 @@ void context_switch(struct vcpu *prev, struct vcpu *next) - - ASSERT(local_irq_is_enabled()); - -+ get_cpu_info()->xen_cr3 = 0; -+ - cpumask_copy(&dirty_mask, next->vcpu_dirty_cpumask); - /* Allow at most one CPU at a time to be dirty. */ - ASSERT(cpumask_weight(&dirty_mask) <= 1); -diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c -index c22455d..69e1ab6 100644 ---- xen/arch/x86/mm.c.orig -+++ xen/arch/x86/mm.c -@@ -3861,6 +3861,7 @@ long do_mmu_update( - struct vcpu *curr = current, *v = curr; - struct domain *d = v->domain, *pt_owner = d, *pg_owner; - struct domain_mmap_cache mapcache; -+ bool sync_guest = false; - uint32_t xsm_needed = 0; - uint32_t xsm_checked = 0; - int rc = put_old_guest_table(curr); -@@ -3998,6 +3998,8 @@ long do_mmu_update( - case PGT_l4_page_table: - rc = mod_l4_entry(va, l4e_from_intpte(req.val), mfn, - cmd == MMU_PT_UPDATE_PRESERVE_AD, v); -+ if ( !rc ) -+ sync_guest = true; - break; - case PGT_writable_page: - perfc_incr(writable_mmu_updates); -@@ -4111,6 +4114,20 @@ long do_mmu_update( - - domain_mmap_cache_destroy(&mapcache); - -+ if ( sync_guest ) -+ { -+ /* -+ * Force other vCPU-s of the affected guest to pick up L4 entry -+ * changes (if any). Issue a flush IPI with empty operation mask to -+ * facilitate this (including ourselves waiting for the IPI to -+ * actually have arrived). Utilize the fact that FLUSH_VA_VALID is -+ * meaningless without FLUSH_CACHE, but will allow to pass the no-op -+ * check in flush_area_mask(). -+ */ -+ flush_area_mask(pt_owner->domain_dirty_cpumask, -+ ZERO_BLOCK_PTR, FLUSH_VA_VALID); -+ } -+ - perfc_add(num_page_updates, i); - - out: -diff --git a/xen/arch/x86/smpboot.c b/xen/arch/x86/smpboot.c -index 144258f..327c744 100644 ---- xen/arch/x86/smpboot.c.orig -+++ xen/arch/x86/smpboot.c -@@ -319,6 +319,9 @@ void start_secondary(void *unused) - */ - spin_debug_disable(); - -+ get_cpu_info()->xen_cr3 = 0; -+ get_cpu_info()->pv_cr3 = __pa(this_cpu(root_pgt)); -+ - load_system_tables(); - - /* Full exception support from here on in. */ -@@ -628,6 +631,187 @@ void cpu_exit_clear(unsigned int cpu) - set_cpu_state(CPU_STATE_DEAD); - } - -+static int clone_mapping(const void *ptr, root_pgentry_t *rpt) -+{ -+ unsigned long linear = (unsigned long)ptr, pfn; -+ unsigned int flags; -+ l3_pgentry_t *pl3e = l4e_to_l3e(idle_pg_table[root_table_offset(linear)]) + -+ l3_table_offset(linear); -+ l2_pgentry_t *pl2e; -+ l1_pgentry_t *pl1e; -+ -+ if ( linear < DIRECTMAP_VIRT_START ) -+ return 0; -+ -+ flags = l3e_get_flags(*pl3e); -+ ASSERT(flags & _PAGE_PRESENT); -+ if ( flags & _PAGE_PSE ) -+ { -+ pfn = (l3e_get_pfn(*pl3e) & ~((1UL << (2 * PAGETABLE_ORDER)) - 1)) | -+ (PFN_DOWN(linear) & ((1UL << (2 * PAGETABLE_ORDER)) - 1)); -+ flags &= ~_PAGE_PSE; -+ } -+ else -+ { -+ pl2e = l3e_to_l2e(*pl3e) + l2_table_offset(linear); -+ flags = l2e_get_flags(*pl2e); -+ ASSERT(flags & _PAGE_PRESENT); -+ if ( flags & _PAGE_PSE ) -+ { -+ pfn = (l2e_get_pfn(*pl2e) & ~((1UL << PAGETABLE_ORDER) - 1)) | -+ (PFN_DOWN(linear) & ((1UL << PAGETABLE_ORDER) - 1)); -+ flags &= ~_PAGE_PSE; -+ } -+ else -+ { -+ pl1e = l2e_to_l1e(*pl2e) + l1_table_offset(linear); -+ flags = l1e_get_flags(*pl1e); -+ if ( !(flags & _PAGE_PRESENT) ) -+ return 0; -+ pfn = l1e_get_pfn(*pl1e); -+ } -+ } -+ -+ if ( !(root_get_flags(rpt[root_table_offset(linear)]) & _PAGE_PRESENT) ) -+ { -+ pl3e = alloc_xen_pagetable(); -+ if ( !pl3e ) -+ return -ENOMEM; -+ clear_page(pl3e); -+ l4e_write(&rpt[root_table_offset(linear)], -+ l4e_from_paddr(__pa(pl3e), __PAGE_HYPERVISOR)); -+ } -+ else -+ pl3e = l4e_to_l3e(rpt[root_table_offset(linear)]); -+ -+ pl3e += l3_table_offset(linear); -+ -+ if ( !(l3e_get_flags(*pl3e) & _PAGE_PRESENT) ) -+ { -+ pl2e = alloc_xen_pagetable(); -+ if ( !pl2e ) -+ return -ENOMEM; -+ clear_page(pl2e); -+ l3e_write(pl3e, l3e_from_paddr(__pa(pl2e), __PAGE_HYPERVISOR)); -+ } -+ else -+ { -+ ASSERT(!(l3e_get_flags(*pl3e) & _PAGE_PSE)); -+ pl2e = l3e_to_l2e(*pl3e); -+ } -+ -+ pl2e += l2_table_offset(linear); -+ -+ if ( !(l2e_get_flags(*pl2e) & _PAGE_PRESENT) ) -+ { -+ pl1e = alloc_xen_pagetable(); -+ if ( !pl1e ) -+ return -ENOMEM; -+ clear_page(pl1e); -+ l2e_write(pl2e, l2e_from_paddr(__pa(pl1e), __PAGE_HYPERVISOR)); -+ } -+ else -+ { -+ ASSERT(!(l2e_get_flags(*pl2e) & _PAGE_PSE)); -+ pl1e = l2e_to_l1e(*pl2e); -+ } -+ -+ pl1e += l1_table_offset(linear); -+ -+ if ( l1e_get_flags(*pl1e) & _PAGE_PRESENT ) -+ { -+ ASSERT(l1e_get_pfn(*pl1e) == pfn); -+ ASSERT(l1e_get_flags(*pl1e) == flags); -+ } -+ else -+ l1e_write(pl1e, l1e_from_pfn(pfn, flags)); -+ -+ return 0; -+} -+ -+DEFINE_PER_CPU(root_pgentry_t *, root_pgt); -+ -+static int setup_cpu_root_pgt(unsigned int cpu) -+{ -+ root_pgentry_t *rpt = alloc_xen_pagetable(); -+ unsigned int off; -+ int rc; -+ -+ if ( !rpt ) -+ return -ENOMEM; -+ -+ clear_page(rpt); -+ per_cpu(root_pgt, cpu) = rpt; -+ -+ rpt[root_table_offset(RO_MPT_VIRT_START)] = -+ idle_pg_table[root_table_offset(RO_MPT_VIRT_START)]; -+ /* SH_LINEAR_PT inserted together with guest mappings. */ -+ /* PERDOMAIN inserted during context switch. */ -+ rpt[root_table_offset(XEN_VIRT_START)] = -+ idle_pg_table[root_table_offset(XEN_VIRT_START)]; -+ -+ /* Install direct map page table entries for stack, IDT, and TSS. */ -+ for ( off = rc = 0; !rc && off < STACK_SIZE; off += PAGE_SIZE ) -+ rc = clone_mapping(__va(__pa(stack_base[cpu])) + off, rpt); -+ -+ if ( !rc ) -+ rc = clone_mapping(idt_tables[cpu], rpt); -+ if ( !rc ) -+ rc = clone_mapping(&per_cpu(init_tss, cpu), rpt); -+ -+ return rc; -+} -+ -+static void cleanup_cpu_root_pgt(unsigned int cpu) -+{ -+ root_pgentry_t *rpt = per_cpu(root_pgt, cpu); -+ unsigned int r; -+ -+ if ( !rpt ) -+ return; -+ -+ per_cpu(root_pgt, cpu) = NULL; -+ -+ for ( r = root_table_offset(DIRECTMAP_VIRT_START); -+ r < root_table_offset(HYPERVISOR_VIRT_END); ++r ) -+ { -+ l3_pgentry_t *l3t; -+ unsigned int i3; -+ -+ if ( !(root_get_flags(rpt[r]) & _PAGE_PRESENT) ) -+ continue; -+ -+ l3t = l4e_to_l3e(rpt[r]); -+ -+ for ( i3 = 0; i3 < L3_PAGETABLE_ENTRIES; ++i3 ) -+ { -+ l2_pgentry_t *l2t; -+ unsigned int i2; -+ -+ if ( !(l3e_get_flags(l3t[i3]) & _PAGE_PRESENT) ) -+ continue; -+ -+ ASSERT(!(l3e_get_flags(l3t[i3]) & _PAGE_PSE)); -+ l2t = l3e_to_l2e(l3t[i3]); -+ -+ for ( i2 = 0; i2 < L2_PAGETABLE_ENTRIES; ++i2 ) -+ { -+ if ( !(l2e_get_flags(l2t[i2]) & _PAGE_PRESENT) ) -+ continue; -+ -+ ASSERT(!(l2e_get_flags(l2t[i2]) & _PAGE_PSE)); -+ free_xen_pagetable(l2e_to_l1e(l2t[i2])); -+ } -+ -+ free_xen_pagetable(l2t); -+ } -+ -+ free_xen_pagetable(l3t); -+ } -+ -+ free_xen_pagetable(rpt); -+} -+ - static void cpu_smpboot_free(unsigned int cpu) - { - unsigned int order, socket = cpu_to_socket(cpu); -@@ -664,6 +848,8 @@ static void cpu_smpboot_free(unsigned int cpu) - free_domheap_page(mfn_to_page(mfn)); - } - -+ cleanup_cpu_root_pgt(cpu); -+ - order = get_order_from_pages(NR_RESERVED_GDT_PAGES); - free_xenheap_pages(per_cpu(gdt_table, cpu), order); - -@@ -719,6 +905,9 @@ static int cpu_smpboot_alloc(unsigned int cpu) - set_ist(&idt_tables[cpu][TRAP_nmi], IST_NONE); - set_ist(&idt_tables[cpu][TRAP_machine_check], IST_NONE); - -+ if ( setup_cpu_root_pgt(cpu) ) -+ goto oom; -+ - for ( stub_page = 0, i = cpu & ~(STUBS_PER_PAGE - 1); - i < nr_cpu_ids && i <= (cpu | (STUBS_PER_PAGE - 1)); ++i ) - if ( cpu_online(i) && cpu_to_node(i) == node ) -@@ -773,6 +962,8 @@ static struct notifier_block cpu_smpboot_nfb = { - - void __init smp_prepare_cpus(unsigned int max_cpus) - { -+ int rc; -+ - register_cpu_notifier(&cpu_smpboot_nfb); - - mtrr_aps_sync_begin(); -@@ -786,6 +977,11 @@ void __init smp_prepare_cpus(unsigned int max_cpus) - - stack_base[0] = stack_start; - -+ rc = setup_cpu_root_pgt(0); -+ if ( rc ) -+ panic("Error %d setting up PV root page table\n", rc); -+ get_cpu_info()->pv_cr3 = __pa(per_cpu(root_pgt, 0)); -+ - set_nr_sockets(); - - socket_cpumask = xzalloc_array(cpumask_t *, nr_sockets); -@@ -850,6 +1046,8 @@ void __init smp_prepare_boot_cpu(void) - { - cpumask_set_cpu(smp_processor_id(), &cpu_online_map); - cpumask_set_cpu(smp_processor_id(), &cpu_present_map); -+ -+ get_cpu_info()->xen_cr3 = 0; - } - - static void -diff --git a/xen/arch/x86/x86_64/asm-offsets.c b/xen/arch/x86/x86_64/asm-offsets.c -index 64905c6..325abdc 100644 ---- xen/arch/x86/x86_64/asm-offsets.c.orig -+++ xen/arch/x86/x86_64/asm-offsets.c -@@ -137,6 +137,8 @@ void __dummy__(void) - OFFSET(CPUINFO_processor_id, struct cpu_info, processor_id); - OFFSET(CPUINFO_current_vcpu, struct cpu_info, current_vcpu); - OFFSET(CPUINFO_cr4, struct cpu_info, cr4); -+ OFFSET(CPUINFO_xen_cr3, struct cpu_info, xen_cr3); -+ OFFSET(CPUINFO_pv_cr3, struct cpu_info, pv_cr3); - DEFINE(CPUINFO_sizeof, sizeof(struct cpu_info)); - BLANK(); - -diff --git a/xen/arch/x86/x86_64/compat/entry.S b/xen/arch/x86/x86_64/compat/entry.S -index df693c2..c8f68a0 100644 ---- xen/arch/x86/x86_64/compat/entry.S.orig -+++ xen/arch/x86/x86_64/compat/entry.S -@@ -205,6 +205,17 @@ ENTRY(cstar_enter) - pushq $0 - movl $TRAP_syscall, 4(%rsp) - SAVE_ALL -+ -+ GET_STACK_END(bx) -+ mov STACK_CPUINFO_FIELD(xen_cr3)(%rbx), %rcx -+ neg %rcx -+ jz .Lcstar_cr3_okay -+ mov %rcx, STACK_CPUINFO_FIELD(xen_cr3)(%rbx) -+ neg %rcx -+ write_cr3 rcx, rdi, rsi -+ movq $0, STACK_CPUINFO_FIELD(xen_cr3)(%rbx) -+.Lcstar_cr3_okay: -+ - GET_CURRENT(bx) - movq VCPU_domain(%rbx),%rcx - cmpb $0,DOMAIN_is_32bit_pv(%rcx) -diff --git a/xen/arch/x86/x86_64/entry.S b/xen/arch/x86/x86_64/entry.S -index ac9ab4c..d1afb3c 100644 ---- xen/arch/x86/x86_64/entry.S.orig -+++ xen/arch/x86/x86_64/entry.S -@@ -36,6 +36,32 @@ ENTRY(switch_to_kernel) - /* %rbx: struct vcpu, interrupts disabled */ - restore_all_guest: - ASSERT_INTERRUPTS_DISABLED -+ -+ /* Copy guest mappings and switch to per-CPU root page table. */ -+ mov %cr3, %r9 -+ GET_STACK_END(dx) -+ mov STACK_CPUINFO_FIELD(pv_cr3)(%rdx), %rdi -+ movabs $PADDR_MASK & PAGE_MASK, %rsi -+ movabs $DIRECTMAP_VIRT_START, %rcx -+ mov %rdi, %rax -+ and %rsi, %rdi -+ and %r9, %rsi -+ add %rcx, %rdi -+ add %rcx, %rsi -+ mov $ROOT_PAGETABLE_FIRST_XEN_SLOT, %ecx -+ mov root_table_offset(SH_LINEAR_PT_VIRT_START)*8(%rsi), %r8 -+ mov %r8, root_table_offset(SH_LINEAR_PT_VIRT_START)*8(%rdi) -+ rep movsq -+ mov $ROOT_PAGETABLE_ENTRIES - \ -+ ROOT_PAGETABLE_LAST_XEN_SLOT - 1, %ecx -+ sub $(ROOT_PAGETABLE_FIRST_XEN_SLOT - \ -+ ROOT_PAGETABLE_LAST_XEN_SLOT - 1) * 8, %rsi -+ sub $(ROOT_PAGETABLE_FIRST_XEN_SLOT - \ -+ ROOT_PAGETABLE_LAST_XEN_SLOT - 1) * 8, %rdi -+ rep movsq -+ mov %r9, STACK_CPUINFO_FIELD(xen_cr3)(%rdx) -+ write_cr3 rax, rdi, rsi -+ - RESTORE_ALL - testw $TRAP_syscall,4(%rsp) - jz iret_exit_to_guest -@@ -70,6 +96,22 @@ iret_exit_to_guest: - ALIGN - /* No special register assumptions. */ - restore_all_xen: -+ /* -+ * Check whether we need to switch to the per-CPU page tables, in -+ * case we return to late PV exit code (from an NMI or #MC). -+ */ -+ GET_STACK_END(ax) -+ mov STACK_CPUINFO_FIELD(xen_cr3)(%rax), %rdx -+ mov STACK_CPUINFO_FIELD(pv_cr3)(%rax), %rax -+ test %rdx, %rdx -+ /* -+ * Ideally the condition would be "nsz", but such doesn't exist, -+ * so "g" will have to do. -+ */ -+UNLIKELY_START(g, exit_cr3) -+ write_cr3 rax, rdi, rsi -+UNLIKELY_END(exit_cr3) -+ - RESTORE_ALL adj=8 - iretq - -@@ -99,7 +141,18 @@ ENTRY(lstar_enter) - pushq $0 - movl $TRAP_syscall, 4(%rsp) - SAVE_ALL -- GET_CURRENT(bx) -+ -+ GET_STACK_END(bx) -+ mov STACK_CPUINFO_FIELD(xen_cr3)(%rbx), %rcx -+ neg %rcx -+ jz .Llstar_cr3_okay -+ mov %rcx, STACK_CPUINFO_FIELD(xen_cr3)(%rbx) -+ neg %rcx -+ write_cr3 rcx, rdi, rsi -+ movq $0, STACK_CPUINFO_FIELD(xen_cr3)(%rbx) -+.Llstar_cr3_okay: -+ -+ __GET_CURRENT(bx) - testb $TF_kernel_mode,VCPU_thread_flags(%rbx) - jz switch_to_kernel - -@@ -191,7 +244,18 @@ GLOBAL(sysenter_eflags_saved) - pushq $0 - movl $TRAP_syscall, 4(%rsp) - SAVE_ALL -- GET_CURRENT(bx) -+ -+ GET_STACK_END(bx) -+ mov STACK_CPUINFO_FIELD(xen_cr3)(%rbx), %rcx -+ neg %rcx -+ jz .Lsyse_cr3_okay -+ mov %rcx, STACK_CPUINFO_FIELD(xen_cr3)(%rbx) -+ neg %rcx -+ write_cr3 rcx, rdi, rsi -+ movq $0, STACK_CPUINFO_FIELD(xen_cr3)(%rbx) -+.Lsyse_cr3_okay: -+ -+ __GET_CURRENT(bx) - cmpb $0,VCPU_sysenter_disables_events(%rbx) - movq VCPU_sysenter_addr(%rbx),%rax - setne %cl -@@ -227,13 +291,23 @@ ENTRY(int80_direct_trap) - movl $0x80, 4(%rsp) - SAVE_ALL - -+ GET_STACK_END(bx) -+ mov STACK_CPUINFO_FIELD(xen_cr3)(%rbx), %rcx -+ neg %rcx -+ jz .Lint80_cr3_okay -+ mov %rcx, STACK_CPUINFO_FIELD(xen_cr3)(%rbx) -+ neg %rcx -+ write_cr3 rcx, rdi, rsi -+ movq $0, STACK_CPUINFO_FIELD(xen_cr3)(%rbx) -+.Lint80_cr3_okay: -+ - cmpb $0,untrusted_msi(%rip) - UNLIKELY_START(ne, msi_check) - movl $0x80,%edi - call check_for_unexpected_msi - UNLIKELY_END(msi_check) - -- GET_CURRENT(bx) -+ __GET_CURRENT(bx) - - /* Check that the callback is non-null. */ - leaq VCPU_int80_bounce(%rbx),%rdx -@@ -384,9 +458,27 @@ ENTRY(dom_crash_sync_extable) - - ENTRY(common_interrupt) - SAVE_ALL CLAC -+ -+ GET_STACK_END(14) -+ mov STACK_CPUINFO_FIELD(xen_cr3)(%r14), %rcx -+ mov %rcx, %r15 -+ neg %rcx -+ jz .Lintr_cr3_okay -+ jns .Lintr_cr3_load -+ mov %rcx, STACK_CPUINFO_FIELD(xen_cr3)(%r14) -+ neg %rcx -+.Lintr_cr3_load: -+ write_cr3 rcx, rdi, rsi -+ xor %ecx, %ecx -+ mov %rcx, STACK_CPUINFO_FIELD(xen_cr3)(%r14) -+ testb $3, UREGS_cs(%rsp) -+ cmovnz %rcx, %r15 -+.Lintr_cr3_okay: -+ - CR4_PV32_RESTORE - movq %rsp,%rdi - callq do_IRQ -+ mov %r15, STACK_CPUINFO_FIELD(xen_cr3)(%r14) - jmp ret_from_intr - - /* No special register assumptions. */ -@@ -404,6 +496,23 @@ ENTRY(page_fault) - /* No special register assumptions. */ - GLOBAL(handle_exception) - SAVE_ALL CLAC -+ -+ GET_STACK_END(14) -+ mov STACK_CPUINFO_FIELD(xen_cr3)(%r14), %rcx -+ mov %rcx, %r15 -+ neg %rcx -+ jz .Lxcpt_cr3_okay -+ jns .Lxcpt_cr3_load -+ mov %rcx, STACK_CPUINFO_FIELD(xen_cr3)(%r14) -+ neg %rcx -+.Lxcpt_cr3_load: -+ write_cr3 rcx, rdi, rsi -+ xor %ecx, %ecx -+ mov %rcx, STACK_CPUINFO_FIELD(xen_cr3)(%r14) -+ testb $3, UREGS_cs(%rsp) -+ cmovnz %rcx, %r15 -+.Lxcpt_cr3_okay: -+ - handle_exception_saved: - GET_CURRENT(bx) - testb $X86_EFLAGS_IF>>8,UREGS_eflags+1(%rsp) -@@ -468,6 +577,7 @@ handle_exception_saved: - leaq exception_table(%rip),%rdx - PERFC_INCR(exceptions, %rax, %rbx) - callq *(%rdx,%rax,8) -+ mov %r15, STACK_CPUINFO_FIELD(xen_cr3)(%r14) - testb $3,UREGS_cs(%rsp) - jz restore_all_xen - leaq VCPU_trap_bounce(%rbx),%rdx -@@ -500,6 +610,7 @@ exception_with_ints_disabled: - rep; movsq # make room for ec/ev - 1: movq UREGS_error_code(%rsp),%rax # ec/ev - movq %rax,UREGS_kernel_sizeof(%rsp) -+ mov %r15, STACK_CPUINFO_FIELD(xen_cr3)(%r14) - jmp restore_all_xen # return to fixup code - - /* No special register assumptions. */ -@@ -578,6 +689,17 @@ ENTRY(double_fault) - movl $TRAP_double_fault,4(%rsp) - /* Set AC to reduce chance of further SMAP faults */ - SAVE_ALL STAC -+ -+ GET_STACK_END(bx) -+ mov STACK_CPUINFO_FIELD(xen_cr3)(%rbx), %rbx -+ test %rbx, %rbx -+ jz .Ldblf_cr3_okay -+ jns .Ldblf_cr3_load -+ neg %rbx -+.Ldblf_cr3_load: -+ write_cr3 rbx, rdi, rsi -+.Ldblf_cr3_okay: -+ - movq %rsp,%rdi - call do_double_fault - BUG /* do_double_fault() shouldn't return. */ -@@ -596,10 +718,28 @@ ENTRY(nmi) - movl $TRAP_nmi,4(%rsp) - handle_ist_exception: - SAVE_ALL CLAC -+ -+ GET_STACK_END(14) -+ mov STACK_CPUINFO_FIELD(xen_cr3)(%r14), %rcx -+ mov %rcx, %r15 -+ neg %rcx -+ jz .List_cr3_okay -+ jns .List_cr3_load -+ mov %rcx, STACK_CPUINFO_FIELD(xen_cr3)(%r14) -+ neg %rcx -+.List_cr3_load: -+ write_cr3 rcx, rdi, rsi -+ movq $0, STACK_CPUINFO_FIELD(xen_cr3)(%r14) -+.List_cr3_okay: -+ - CR4_PV32_RESTORE - testb $3,UREGS_cs(%rsp) - jz 1f -- /* Interrupted guest context. Copy the context to stack bottom. */ -+ /* -+ * Interrupted guest context. Clear the restore value for xen_cr3 -+ * and copy the context to stack bottom. -+ */ -+ xor %r15, %r15 - GET_CPUINFO_FIELD(guest_cpu_user_regs,di) - movq %rsp,%rsi - movl $UREGS_kernel_sizeof/8,%ecx -@@ -609,6 +749,7 @@ handle_ist_exception: - movzbl UREGS_entry_vector(%rsp),%eax - leaq exception_table(%rip),%rdx - callq *(%rdx,%rax,8) -+ mov %r15, STACK_CPUINFO_FIELD(xen_cr3)(%r14) - cmpb $TRAP_nmi,UREGS_entry_vector(%rsp) - jne ret_from_intr - -diff --git a/xen/include/asm-x86/asm_defns.h b/xen/include/asm-x86/asm_defns.h -index 99cb337..1c8d66c 100644 ---- xen/include/asm-x86/asm_defns.h.orig -+++ xen/include/asm-x86/asm_defns.h -@@ -93,9 +93,30 @@ void ret_from_intr(void); - UNLIKELY_DONE(mp, tag); \ - __UNLIKELY_END(tag) - -+ .equ .Lrax, 0 -+ .equ .Lrcx, 1 -+ .equ .Lrdx, 2 -+ .equ .Lrbx, 3 -+ .equ .Lrsp, 4 -+ .equ .Lrbp, 5 -+ .equ .Lrsi, 6 -+ .equ .Lrdi, 7 -+ .equ .Lr8, 8 -+ .equ .Lr9, 9 -+ .equ .Lr10, 10 -+ .equ .Lr11, 11 -+ .equ .Lr12, 12 -+ .equ .Lr13, 13 -+ .equ .Lr14, 14 -+ .equ .Lr15, 15 -+ - #define STACK_CPUINFO_FIELD(field) (1 - CPUINFO_sizeof + CPUINFO_##field) - #define GET_STACK_END(reg) \ -+ .if .Lr##reg > 8; \ -+ movq $STACK_SIZE-1, %r##reg; \ -+ .else; \ - movl $STACK_SIZE-1, %e##reg; \ -+ .endif; \ - orq %rsp, %r##reg - - #define GET_CPUINFO_FIELD(field, reg) \ -@@ -177,6 +198,15 @@ void ret_from_intr(void); - #define ASM_STAC ASM_AC(STAC) - #define ASM_CLAC ASM_AC(CLAC) - -+.macro write_cr3 val:req, tmp1:req, tmp2:req -+ mov %cr4, %\tmp1 -+ mov %\tmp1, %\tmp2 -+ and $~X86_CR4_PGE, %\tmp1 -+ mov %\tmp1, %cr4 -+ mov %\val, %cr3 -+ mov %\tmp2, %cr4 -+.endm -+ - #define CR4_PV32_RESTORE \ - 667: ASM_NOP5; \ - .pushsection .altinstr_replacement, "ax"; \ -diff --git a/xen/include/asm-x86/current.h b/xen/include/asm-x86/current.h -index e6587e6..397fa4c 100644 ---- xen/include/asm-x86/current.h.orig -+++ xen/include/asm-x86/current.h -@@ -42,6 +42,18 @@ struct cpu_info { - struct vcpu *current_vcpu; - unsigned long per_cpu_offset; - unsigned long cr4; -+ /* -+ * Of the two following fields the latter is being set to the CR3 value -+ * to be used on the given pCPU for loading whenever 64-bit PV guest -+ * context is being entered. The value never changes once set. -+ * The former is the value to restore when re-entering Xen, if any. IOW -+ * its value being zero means there's nothing to restore. However, its -+ * value can also be negative, indicating to the exit-to-Xen code that -+ * restoring is not necessary, but allowing any nested entry code paths -+ * to still know the value to put back into CR3. -+ */ -+ unsigned long xen_cr3; -+ unsigned long pv_cr3; - /* get_stack_bottom() must be 16-byte aligned */ - }; - -diff --git a/xen/include/asm-x86/processor.h b/xen/include/asm-x86/processor.h -index fb0cd55..a73993c 100644 ---- xen/include/asm-x86/processor.h.orig -+++ xen/include/asm-x86/processor.h -@@ -524,6 +524,7 @@ extern idt_entry_t idt_table[]; - extern idt_entry_t *idt_tables[]; - - DECLARE_PER_CPU(struct tss_struct, init_tss); -+DECLARE_PER_CPU(root_pgentry_t *, root_pgt); - - extern void init_int80_direct_trap(struct vcpu *v); - -diff --git a/xen/include/asm-x86/x86_64/page.h b/xen/include/asm-x86/x86_64/page.h -index 589f225..afc77c3 100644 ---- xen/include/asm-x86/x86_64/page.h.orig -+++ xen/include/asm-x86/x86_64/page.h -@@ -25,8 +25,8 @@ - /* These are architectural limits. Current CPUs support only 40-bit phys. */ - #define PADDR_BITS 52 - #define VADDR_BITS 48 --#define PADDR_MASK ((1UL << PADDR_BITS)-1) --#define VADDR_MASK ((1UL << VADDR_BITS)-1) -+#define PADDR_MASK ((_AC(1,UL) << PADDR_BITS) - 1) -+#define VADDR_MASK ((_AC(1,UL) << VADDR_BITS) - 1) - - #define is_canonical_address(x) (((long)(x) >> 47) == ((long)(x) >> 63)) - -@@ -117,6 +117,7 @@ typedef l4_pgentry_t root_pgentry_t; - : (((_s) < ROOT_PAGETABLE_FIRST_XEN_SLOT) || \ - ((_s) > ROOT_PAGETABLE_LAST_XEN_SLOT))) - -+#define root_table_offset l4_table_offset - #define root_get_pfn l4e_get_pfn - #define root_get_flags l4e_get_flags - #define root_get_intpte l4e_get_intpte --- -2.1.4 - diff --git a/sysutils/xenkernel48/patches/patch-XSA254-4 b/sysutils/xenkernel48/patches/patch-XSA254-4 deleted file mode 100644 index 5561ef9f93f..00000000000 --- a/sysutils/xenkernel48/patches/patch-XSA254-4 +++ /dev/null @@ -1,165 +0,0 @@ -$NetBSD: patch-XSA254-4,v 1.1 2018/01/18 10:28:13 bouyer Exp $ - -From 31d38d633a306b2b06767b5a5f5a8a00269f3c92 Mon Sep 17 00:00:00 2001 -From: Jan Beulich <jbeulich@suse.com> -Date: Wed, 17 Jan 2018 17:17:26 +0100 -Subject: [PATCH] x86: allow Meltdown band-aid to be disabled - -First of all we don't need it on AMD systems. Additionally allow its use -to be controlled by command line option. For best backportability, this -intentionally doesn't use alternative instruction patching to achieve -the intended effect - while we likely want it, this will be later -follow-up. - -Signed-off-by: Jan Beulich <jbeulich@suse.com> -Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com> -master commit: e871e80c38547d9faefc6604532ba3e985e65873 -master date: 2018-01-16 17:50:59 +0100 ---- - docs/misc/xen-command-line.markdown | 12 ++++++++++++ - xen/arch/x86/domain.c | 7 +++++-- - xen/arch/x86/mm.c | 2 +- - xen/arch/x86/smpboot.c | 17 ++++++++++++++--- - xen/arch/x86/x86_64/entry.S | 2 ++ - 5 files changed, 34 insertions(+), 6 deletions(-) - -diff --git a/docs/misc/xen-command-line.markdown b/docs/misc/xen-command-line.markdown -index 0fcdb7d..768d4f5 100644 ---- docs/misc/xen-command-line.markdown.orig -+++ docs/misc/xen-command-line.markdown -@@ -1687,6 +1687,18 @@ In the case that x2apic is in use, this option switches between physical and - clustered mode. The default, given no hint from the **FADT**, is cluster - mode. - -+### xpti -+> `= <boolean>` -+ -+> Default: `false` on AMD hardware -+> Default: `true` everywhere else -+ -+Override default selection of whether to isolate 64-bit PV guest page -+tables. -+ -+** WARNING: Not yet a complete isolation implementation, but better than -+nothing. ** -+ - ### xsave - > `= <boolean>` - -diff --git a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c -index bf3590d..8817263 100644 ---- xen/arch/x86/domain.c.orig -+++ xen/arch/x86/domain.c -@@ -1947,12 +1947,15 @@ static void paravirt_ctxt_switch_from(struct vcpu *v) - - static void paravirt_ctxt_switch_to(struct vcpu *v) - { -+ root_pgentry_t *root_pgt = this_cpu(root_pgt); - unsigned long cr4; - - switch_kernel_stack(v); - -- this_cpu(root_pgt)[root_table_offset(PERDOMAIN_VIRT_START)] = -- l4e_from_page(v->domain->arch.perdomain_l3_pg, __PAGE_HYPERVISOR_RW); -+ if ( root_pgt ) -+ root_pgt[root_table_offset(PERDOMAIN_VIRT_START)] = -+ l4e_from_page(v->domain->arch.perdomain_l3_pg, -+ __PAGE_HYPERVISOR_RW); - - cr4 = pv_guest_cr4_to_real_cr4(v); - if ( unlikely(cr4 != read_cr4()) ) -diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c -index 69e1ab6..303c551 100644 ---- xen/arch/x86/mm.c.orig -+++ xen/arch/x86/mm.c -@@ -3999,7 +3999,7 @@ long do_mmu_update( - rc = mod_l4_entry(va, l4e_from_intpte(req.val), mfn, - cmd == MMU_PT_UPDATE_PRESERVE_AD, v); - if ( !rc ) -- sync_guest = true; -+ sync_guest = this_cpu(root_pgt); - break; - case PGT_writable_page: - perfc_incr(writable_mmu_updates); -diff --git a/xen/arch/x86/smpboot.c b/xen/arch/x86/smpboot.c -index 327c744..c19508f 100644 ---- xen/arch/x86/smpboot.c.orig -+++ xen/arch/x86/smpboot.c -@@ -320,7 +320,7 @@ void start_secondary(void *unused) - spin_debug_disable(); - - get_cpu_info()->xen_cr3 = 0; -- get_cpu_info()->pv_cr3 = __pa(this_cpu(root_pgt)); -+ get_cpu_info()->pv_cr3 = this_cpu(root_pgt) ? __pa(this_cpu(root_pgt)) : 0; - - load_system_tables(); - -@@ -729,14 +729,20 @@ static int clone_mapping(const void *ptr, root_pgentry_t *rpt) - return 0; - } - -+static __read_mostly int8_t opt_xpti = -1; -+boolean_param("xpti", opt_xpti); - DEFINE_PER_CPU(root_pgentry_t *, root_pgt); - - static int setup_cpu_root_pgt(unsigned int cpu) - { -- root_pgentry_t *rpt = alloc_xen_pagetable(); -+ root_pgentry_t *rpt; - unsigned int off; - int rc; - -+ if ( !opt_xpti ) -+ return 0; -+ -+ rpt = alloc_xen_pagetable(); - if ( !rpt ) - return -ENOMEM; - -@@ -977,10 +983,14 @@ void __init smp_prepare_cpus(unsigned int max_cpus) - - stack_base[0] = stack_start; - -+ if ( opt_xpti < 0 ) -+ opt_xpti = boot_cpu_data.x86_vendor != X86_VENDOR_AMD; -+ - rc = setup_cpu_root_pgt(0); - if ( rc ) - panic("Error %d setting up PV root page table\n", rc); -- get_cpu_info()->pv_cr3 = __pa(per_cpu(root_pgt, 0)); -+ if ( per_cpu(root_pgt, 0) ) -+ get_cpu_info()->pv_cr3 = __pa(per_cpu(root_pgt, 0)); - - set_nr_sockets(); - -@@ -1048,6 +1058,7 @@ void __init smp_prepare_boot_cpu(void) - cpumask_set_cpu(smp_processor_id(), &cpu_present_map); - - get_cpu_info()->xen_cr3 = 0; -+ get_cpu_info()->pv_cr3 = 0; - } - - static void -diff --git a/xen/arch/x86/x86_64/entry.S b/xen/arch/x86/x86_64/entry.S -index d1afb3c..505604f 100644 ---- xen/arch/x86/x86_64/entry.S.orig -+++ xen/arch/x86/x86_64/entry.S -@@ -45,6 +45,7 @@ restore_all_guest: - movabs $DIRECTMAP_VIRT_START, %rcx - mov %rdi, %rax - and %rsi, %rdi -+ jz .Lrag_keep_cr3 - and %r9, %rsi - add %rcx, %rdi - add %rcx, %rsi -@@ -61,6 +62,7 @@ restore_all_guest: - rep movsq - mov %r9, STACK_CPUINFO_FIELD(xen_cr3)(%rdx) - write_cr3 rax, rdi, rsi -+.Lrag_keep_cr3: - - RESTORE_ALL - testw $TRAP_syscall,4(%rsp) --- -2.1.4 - diff --git a/sysutils/xentools48/Makefile b/sysutils/xentools48/Makefile index 73df03a77f5..fc286a013af 100644 --- a/sysutils/xentools48/Makefile +++ b/sysutils/xentools48/Makefile @@ -1,6 +1,6 @@ -# $NetBSD: Makefile,v 1.15 2018/01/15 09:47:55 jperkin Exp $ +# $NetBSD: Makefile,v 1.16 2018/01/24 23:29:32 bouyer Exp $ # -VERSION= 4.8.2 +VERSION= 4.8.3 VERSION_IPXE= 827dd1bfee67daa683935ce65316f7e0f057fe1c DIST_IPXE= ipxe-git-${VERSION_IPXE}.tar.gz DIST_NEWLIB= newlib-1.16.0.tar.gz @@ -16,7 +16,6 @@ DIST_LIBPCI= pciutils-2.2.9.tar.bz2 DIST_SUBDIR= xen48 DISTNAME= xen-${VERSION} PKGNAME= xentools48-${VERSION} -PKGREVISION= 2 CATEGORIES= sysutils MASTER_SITES= https://downloads.xenproject.org/release/xen/${VERSION}/ diff --git a/sysutils/xentools48/distinfo b/sysutils/xentools48/distinfo index eeae956278b..4963e47adb6 100644 --- a/sysutils/xentools48/distinfo +++ b/sysutils/xentools48/distinfo @@ -1,4 +1,4 @@ -$NetBSD: distinfo,v 1.6 2017/10/28 04:08:46 khorben Exp $ +$NetBSD: distinfo,v 1.7 2018/01/24 23:29:32 bouyer Exp $ SHA1 (xen48/gmp-4.3.2.tar.bz2) = c011e8feaf1bb89158bd55eaabd7ef8fdd101a2c RMD160 (xen48/gmp-4.3.2.tar.bz2) = a8f3f41501ece290c348aeb4444bbea40bc53e71 @@ -36,10 +36,10 @@ SHA1 (xen48/tpm_emulator-0.7.4.tar.gz) = ffa3aafcd833fdcd7483bbdb4ff862f30ffde57 RMD160 (xen48/tpm_emulator-0.7.4.tar.gz) = ded71632d316126138f2db4a5f2051b2489ae5ff SHA512 (xen48/tpm_emulator-0.7.4.tar.gz) = 4928b5b82f57645be9408362706ff2c4d9baa635b21b0d41b1c82930e8c60a759b1ea4fa74d7e6c7cae1b7692d006aa5cb72df0c3b88bf049779aa2b566f9d35 Size (xen48/tpm_emulator-0.7.4.tar.gz) = 214145 bytes -SHA1 (xen48/xen-4.8.2.tar.gz) = 184c57ce9e71e34b3cbdd318524021f44946efbe -RMD160 (xen48/xen-4.8.2.tar.gz) = f4126cb0f7ff427ed7d20ce399dcd1077c599343 -SHA512 (xen48/xen-4.8.2.tar.gz) = 7805531f73d23ecfff3439770e62d387f4254a444875670d53a0a739323e5d4d8f8fcc478f8936ee1ae8aff3e0229549e47c01c606365a8ce060dd5c503e87da -Size (xen48/xen-4.8.2.tar.gz) = 22522336 bytes +SHA1 (xen48/xen-4.8.3.tar.gz) = ee55e8dc1e79d16d2f85fbe1f8bbd27a2db8422f +RMD160 (xen48/xen-4.8.3.tar.gz) = 54b7ba828d8198c2a4629eabf7acfba2e9c6561c +SHA512 (xen48/xen-4.8.3.tar.gz) = 584d8ee6e432e291a70e8f727da6d0a71afff7509fbf2e32eeb9cfe58b8279a80770c2c5f7759dcb5c0b08ed4644039e770e280ab534673215753d598f3f6508 +Size (xen48/xen-4.8.3.tar.gz) = 22529092 bytes SHA1 (xen48/zlib-1.2.3.tar.gz) = 60faeaaf250642db5c0ea36cd6dcc9f99c8f3902 RMD160 (xen48/zlib-1.2.3.tar.gz) = 89a57e336c24f7f6eebda3a1724e14b71187e117 SHA512 (xen48/zlib-1.2.3.tar.gz) = 021b958fcd0d346c4ba761bcf0cc40f3522de6186cf5a0a6ea34a70504ce9622b1c2626fce40675bc8282cf5f5ade18473656abc38050f72f5d6480507a2106e diff --git a/sysutils/xentools48/patches/patch-XSA233 b/sysutils/xentools48/patches/patch-XSA233 deleted file mode 100644 index a6104eda1ea..00000000000 --- a/sysutils/xentools48/patches/patch-XSA233 +++ /dev/null @@ -1,54 +0,0 @@ -$NetBSD: patch-XSA233,v 1.1 2017/10/17 08:42:30 bouyer Exp $ - -From: Juergen Gross <jgross@suse.com> -Subject: tools/xenstore: dont unlink connection object twice - -A connection object of a domain with associated stubdom has two -parents: the domain and the stubdom. When cleaning up the list of -active domains in domain_cleanup() make sure not to unlink the -connection twice from the same domain. This could happen when the -domain and its stubdom are being destroyed at the same time leading -to the domain loop being entered twice. - -Additionally don't use talloc_free() in this case as it will remove -a random parent link, leading eventually to a memory leak. Use -talloc_unlink() instead specifying the context from which the -connection object should be removed. - -This is XSA-233. - -Reported-by: Eric Chanudet <chanudete@ainfosec.com> -Signed-off-by: Juergen Gross <jgross@suse.com> -Reviewed-by: Ian Jackson <ian.jackson@eu.citrix.com> - ---- tools/xenstore/xenstored_domain.c.orig -+++ tools/xenstore/xenstored_domain.c -@@ -221,10 +221,11 @@ static int destroy_domain(void *_domain) - static void domain_cleanup(void) - { - xc_dominfo_t dominfo; -- struct domain *domain, *tmp; -+ struct domain *domain; - int notify = 0; - -- list_for_each_entry_safe(domain, tmp, &domains, list) { -+ again: -+ list_for_each_entry(domain, &domains, list) { - if (xc_domain_getinfo(*xc_handle, domain->domid, 1, - &dominfo) == 1 && - dominfo.domid == domain->domid) { -@@ -236,8 +237,12 @@ static void domain_cleanup(void) - if (!dominfo.dying) - continue; - } -- talloc_free(domain->conn); -- notify = 0; /* destroy_domain() fires the watch */ -+ if (domain->conn) { -+ talloc_unlink(talloc_autofree_context(), domain->conn); -+ domain->conn = NULL; -+ notify = 0; /* destroy_domain() fires the watch */ -+ goto again; -+ } - } - - if (notify) diff --git a/sysutils/xentools48/patches/patch-XSA240 b/sysutils/xentools48/patches/patch-XSA240 deleted file mode 100644 index 435adf582f8..00000000000 --- a/sysutils/xentools48/patches/patch-XSA240 +++ /dev/null @@ -1,56 +0,0 @@ -$NetBSD: patch-XSA240,v 1.1 2017/10/17 08:42:30 bouyer Exp $ - -From 41d579aad2fee971e5ce0279a9b559a0fdc74452 Mon Sep 17 00:00:00 2001 -From: George Dunlap <george.dunlap@citrix.com> -Date: Fri, 22 Sep 2017 11:46:55 +0100 -Subject: [PATCH 2/2] x86/mm: Disable PV linear pagetables by default - -Allowing pagetables to point to other pagetables of the same level -(often called 'linear pagetables') has been included in Xen since its -inception. But it is not used by the most common PV guests (Linux, -NetBSD, minios), and has been the source of a number of subtle -reference-counting bugs. - -Add a command-line option to control whether PV linear pagetables are -allowed (disabled by default). - -Reported-by: Jann Horn <jannh@google.com> -Signed-off-by: George Dunlap <george.dunlap@citrix.com> -Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com> ---- -Changes since v2: -- s/_/-/; in command-line option -- Added __read_mostly ---- - docs/misc/xen-command-line.markdown | 15 +++++++++++++++ - xen/arch/x86/mm.c | 9 +++++++++ - 2 files changed, 24 insertions(+) - -diff --git a/docs/misc/xen-command-line.markdown b/docs/misc/xen-command-line.markdown -index 54acc60723..ffa66eb146 100644 ---- docs/misc/xen-command-line.markdown.orig -+++ docs/misc/xen-command-line.markdown -@@ -1350,6 +1350,21 @@ The following resources are available: - CDP, one COS will corespond two CBMs other than one with CAT, due to the - sum of CBMs is fixed, that means actual `cos_max` in use will automatically - reduce to half when CDP is enabled. -+ -+### pv-linear-pt -+> `= <boolean>` -+ -+> Default: `true` -+ -+Allow PV guests to have pagetable entries pointing to other pagetables -+of the same level (i.e., allowing L2 PTEs to point to other L2 pages). -+This technique is often called "linear pagetables", and is sometimes -+used to allow operating systems a simple way to consistently map the -+current process's pagetables into its own virtual address space. -+ -+None of the most common PV operating systems (Linux, MiniOS) -+use this technique, but NetBSD in PV mode, and maybe custom operating -+systems which do. - - ### reboot - > `= t[riple] | k[bd] | a[cpi] | p[ci] | P[ower] | e[fi] | n[o] [, [w]arm | [c]old]` -diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c -index 31d4a03840..5d125cff3a 100644 |