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xfs: dabtree scrub needs to range-check level

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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 <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
This commit is contained in:
Darrick J. Wong
2019-03-19 08:16:21 -07:00
parent 6958d11f77
commit 228de124f2
1 changed files with 5 additions and 0 deletions
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5
fs/xfs/scrub/dabtree.c
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@ -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)