From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Make sure scrub's dabtree iterator function checks that we're not
going deeper in the stack than our cursor permits. Found by sparse.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
fs/xfs/scrub/dabtree.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/fs/xfs/scrub/dabtree.c b/fs/xfs/scrub/dabtree.c
index c6ab123b6051..5c6175d074e0 100644
--- a/fs/xfs/scrub/dabtree.c
+++ b/fs/xfs/scrub/dabtree.c
@@ -604,6 +604,11 @@ xchk_da_btree(
/* Drill another level deeper. */
blkno = be32_to_cpu(key->before);
level++;
+ if (level >= XFS_DA_NODE_MAXDEPTH) {
+ /* Too deep! */
+ xchk_da_set_corrupt(&ds, level - 1);
+ break;
+ }
ds.tree_level--;
error = xchk_da_btree_block(&ds, level, blkno);
if (error)
