From: "Darrick J. Wong" <djwong@xxxxxxxxxx>
[ 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@xxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
Signed-off-by: Leah Rumancik <leah.rumancik@xxxxxxxxx>
---
fs/xfs/xfs_fsmap.c | 1 +
1 file changed, 1 insertion(+)
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]);
--
2.46.0.598.g6f2099f65c-goog
