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authorDarrick J. Wong <darrick.wong@oracle.com>2017-04-03 12:22:39 -0700
committerDarrick J. Wong <darrick.wong@oracle.com>2017-04-03 12:22:39 -0700
commitbf9216f922612d2db7666aae01e65064da2ffb3a (patch)
treefdf0a10ee12bbbd95c8312314682352e89dd9dd7 /fs/xfs/xfs_itable.c
parent3dd09d5a8589c640abb49cfcf92b4ed669eafad1 (diff)
xfs: fix kernel memory exposure problems
Fix a memory exposure problems in inumbers where we allocate an array of structures with holes, fail to zero the holes, then blindly copy the kernel memory contents (junk and all) into userspace. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs/xfs/xfs_itable.c')
-rw-r--r--fs/xfs/xfs_itable.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c
index 2a6d9b1558e0..26d67ce3c18d 100644
--- a/fs/xfs/xfs_itable.c
+++ b/fs/xfs/xfs_itable.c
@@ -583,7 +583,7 @@ xfs_inumbers(
return error;
bcount = MIN(left, (int)(PAGE_SIZE / sizeof(*buffer)));
- buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP);
+ buffer = kmem_zalloc(bcount * sizeof(*buffer), KM_SLEEP);
do {
struct xfs_inobt_rec_incore r;
int stat;