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| author | Darrick J. Wong <djwong@kernel.org> | 2023-02-15 04:51:35 +0300 |
|---|---|---|
| committer | Darrick J. Wong <djwong@kernel.org> | 2023-02-15 04:51:35 +0300 |
| commit | 60b730a40c43fbcc034970d3e77eb0f25b8cc1cf (patch) | |
| tree | 1cc0412a9c4352035ccc7f060950f7a472f1cc55 /fs | |
| parent | 571dc9ae4eefb452d32cfb3761a87089e8f37ca7 (diff) | |
| download | linux-60b730a40c43fbcc034970d3e77eb0f25b8cc1cf.tar.xz | |
xfs: fix uninitialized variable access
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>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/xfs/xfs_fsmap.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/xfs/xfs_fsmap.c b/fs/xfs/xfs_fsmap.c index 120d284a03fe..59e7d1a14b67 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]); |