diff options
Diffstat (limited to 'usr/src/uts/common/io/ksyms.c')
| -rw-r--r-- | usr/src/uts/common/io/ksyms.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/usr/src/uts/common/io/ksyms.c b/usr/src/uts/common/io/ksyms.c index c9f0c63b69..5233fcd0b4 100644 --- a/usr/src/uts/common/io/ksyms.c +++ b/usr/src/uts/common/io/ksyms.c @@ -21,6 +21,7 @@ /* * Copyright 2008 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. + * Copyright 2016 Joyent, Inc. */ @@ -219,6 +220,14 @@ ksyms_open(dev_t *devp, int flag, int otyp, struct cred *cred) char *addr; void *hptr = NULL; ksyms_buflist_hdr_t hdr; + + /* + * This device should never be visible in a zone, but if it somehow + * does get created we refuse to allow the zone to use it. + */ + if (crgetzoneid(cred) != GLOBAL_ZONEID) + return (EACCES); + bzero(&hdr, sizeof (struct ksyms_buflist_hdr)); list_create(&hdr.blist, PAGESIZE, offsetof(ksyms_buflist_t, buflist_node)); |