svn commit: r293661 - head/sys/boot/zfs
Allan Jude
allanjude at FreeBSD.org
Mon Jan 11 15:35:31 UTC 2016
Author: allanjude
Date: Mon Jan 11 15:35:29 2016
New Revision: 293661
URL: https://svnweb.freebsd.org/changeset/base/293661
Log:
DIOCGSECTORSIZE expects to write to a u_int, but struct zfs_probe_args
member secsz was a uint16_t
sys/boot/zfs/zfs.c has a probe args structure member, secsz, that is a
uint16_t for media sector size; it is used as an argument for ioctl()
at line 484. however, this ioctl writes 32 bits of data (u_int *) and
therefore this ioctl will overwrite and corrupt 16 bits of memory.
other use cases seem to use correct u_int type for secsz.
PR: 204358
Submitted by: Toomas Soome <tsoome at me.com>
Reviewed by: asomers, delphij, smh
MFC after: 5 days
Differential Revision: https://reviews.freebsd.org/D4811
Modified:
head/sys/boot/zfs/zfs.c
Modified: head/sys/boot/zfs/zfs.c
==============================================================================
--- head/sys/boot/zfs/zfs.c Mon Jan 11 15:30:19 2016 (r293660)
+++ head/sys/boot/zfs/zfs.c Mon Jan 11 15:35:29 2016 (r293661)
@@ -413,7 +413,7 @@ struct zfs_probe_args {
int fd;
const char *devname;
uint64_t *pool_guid;
- uint16_t secsz;
+ u_int secsz;
};
static int
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