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xfs: fix uninitialized variable access

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[ Upstream commit 60b730a40c ]

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>
Acked-by: Chandan Babu R <chandanbabu@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Darrick J. Wong 2024-09-24 11:38:33 -07:00 committed by Greg Kroah-Hartman
parent ce563912b0
commit 120108df92
1 changed files with 1 additions and 0 deletions
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1
fs/xfs/xfs_fsmap.c
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@ -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]);