diff mbox series

[6/8] xfs_repair: constrain attr fork extent count

Message ID 171338845870.1856674.1799595037972812764.stgit@frogsfrogsfrogs (mailing list archive)
State Accepted
Headers show
Series [1/8] xfs_db: add a bmbt inflation command | expand

Commit Message

Darrick J. Wong April 17, 2024, 9:46 p.m. UTC 
From: Darrick J. Wong <djwong@kernel.org>

Don't let the attr fork extent count exceed the maximum possible value.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
 repair/dinode.c |    6 ++++++
 1 file changed, 6 insertions(+)
diff mbox series

Patch

diff --git a/repair/dinode.c b/repair/dinode.c
index b8f5bf4e5..bf93a5790 100644
--- a/repair/dinode.c
+++ b/repair/dinode.c
@@ -2050,6 +2050,7 @@  process_inode_attr_fork(
 	xfs_ino_t		lino = XFS_AGINO_TO_INO(mp, agno, ino);
 	struct xfs_dinode	*dino = *dinop;
 	struct blkmap		*ablkmap = NULL;
+	xfs_extnum_t		max_nex;
 	int			repair = 0;
 	int			err;
 	int			try_rebuild = -1; /* don't know yet */
@@ -2071,6 +2072,11 @@  process_inode_attr_fork(
 	}
 
 	*anextents = xfs_dfork_attr_extents(dino);
+	max_nex = xfs_iext_max_nextents(
+			xfs_dinode_has_large_extent_counts(dino),
+			XFS_ATTR_FORK);
+	if (*anextents > max_nex)
+		*anextents = 1;
 	if (*anextents > be64_to_cpu(dino->di_nblocks))
 		*anextents = 1;