diff options
Diffstat (limited to 'usr/src/uts/common/io/physmem.c')
| -rw-r--r-- | usr/src/uts/common/io/physmem.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/usr/src/uts/common/io/physmem.c b/usr/src/uts/common/io/physmem.c index 39d5003b02..c48fecd133 100644 --- a/usr/src/uts/common/io/physmem.c +++ b/usr/src/uts/common/io/physmem.c @@ -21,6 +21,7 @@ /* * Copyright 2008 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. + * Copyright 2016 Joyent, Inc. */ @@ -807,6 +808,13 @@ physmem_open(dev_t *devp, int flag, int otyp, cred_t *credp) int ret; static int msg_printed = 0; + /* + * 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(credp) != GLOBAL_ZONEID) + return (EACCES); + if ((flag & (FWRITE | FREAD)) != (FWRITE | FREAD)) { return (EINVAL); } |