From 228de124f290e6b981b2c61fbd78215e11264044 Mon Sep 17 00:00:00 2001 From: Darrick J. Wong Date: Tue, 19 Mar 2019 08:16:21 -0700 Subject: xfs: dabtree scrub needs to range-check level Make sure scrub's dabtree iterator function checks that we're not going deeper in the stack than our cursor permits. Signed-off-by: Darrick J. Wong Reviewed-by: Brian Foster --- fs/xfs/scrub/dabtree.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'fs/xfs/scrub') diff --git a/fs/xfs/scrub/dabtree.c b/fs/xfs/scrub/dabtree.c index f1260b4bfdee..90527b094878 100644 --- a/fs/xfs/scrub/dabtree.c +++ b/fs/xfs/scrub/dabtree.c @@ -574,6 +574,11 @@ 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) -- cgit v1.2.3-55-g7522