diff mbox series

[6.1,CANDIDATE,08/26] xfs: fix uninitialized variable access

Message ID 20240905182144.2691920-9-leah.rumancik@gmail.com (mailing list archive)
State Not Applicable, archived
Headers show
Series xfs backports to catch 6.1.y up to 6.6 | expand

Commit Message

Leah Rumancik Sept. 5, 2024, 6:21 p.m. UTC 
From: "Darrick J. Wong" <djwong@kernel.org>

[ Upstream commit 60b730a40c43fbcc034970d3e77eb0f25b8cc1cf ]

If the end position of a GETFSMAP query overlaps an allocated space and
we're using the free space info to generate fsmap info, the akeys
information gets fed into the fsmap formatter with bad results.
Zero-init the space.

Reported-by: syzbot+090ae72d552e6bd93cfe@syzkaller.appspotmail.com
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Leah Rumancik <leah.rumancik@gmail.com>
---
 fs/xfs/xfs_fsmap.c | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/fs/xfs/xfs_fsmap.c b/fs/xfs/xfs_fsmap.c
index d8337274c74d..062e5dc5db9f 100644
--- a/fs/xfs/xfs_fsmap.c
+++ b/fs/xfs/xfs_fsmap.c
@@ -761,6 +761,7 @@  xfs_getfsmap_datadev_bnobt(
 {
 	struct xfs_alloc_rec_incore	akeys[2];
 
+	memset(akeys, 0, sizeof(akeys));
 	info->missing_owner = XFS_FMR_OWN_UNKNOWN;
 	return __xfs_getfsmap_datadev(tp, keys, info,
 			xfs_getfsmap_datadev_bnobt_query, &akeys[0]);