[PATCH AUTOSEL 5.4 172/330] xfs: mark dir corrupt when lookup-by-hash fails

Sasha Levin
2020-09-18T03:04:25Z

From: "Darrick J. Wong" <darrick.wong@oracle.com>

[ Upstream commit 2e107cf869eecc770e3f630060bb4e5f547d0fd8 ]

In xchk_dir_actor, we attempt to validate the directory hash structures
by performing a directory entry lookup by (hashed) name. If the lookup
returns ENOENT, that means that the hash information is corrupt. The
_process_error functions don't catch this, so we have to add that
explicitly.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/xfs/scrub/dir.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/fs/xfs/scrub/dir.c b/fs/xfs/scrub/dir.c
index 1e2e11721eb99..20eca2d8e7c77 100644
--- a/fs/xfs/scrub/dir.c
+++ b/fs/xfs/scrub/dir.c
@@ -152,6 +152,9 @@ xchk_dir_actor(
xname.type = XFS_DIR3_FT_UNKNOWN;

error = xfs_dir_lookup(sdc->sc->tp, ip, &xname, &lookup_ino, NULL);
+ /* ENOENT means the hash lookup failed and the dir is corrupt */
+ if (error == -ENOENT)
+ error = -EFSCORRUPTED;
if (!xchk_fblock_process_error(sdc->sc, XFS_DATA_FORK, offset,
&error))
goto out;
--
2.25.1