From 56830d6cc114f76f656d5e65ab355b070d5a695e Mon Sep 17 00:00:00 2001 From: Darrick J. Wong Date: Wed, 1 Aug 2018 07:40:48 -0700 Subject: xfs: check da node magic in _node_lookup_int Before we start processing what we /think/ is a da3 node block, actually check the magic to make sure that we're looking at a node block. This way we won't blow the asserts in _node_hdr_from_disk on corrupted metadata. Signed-off-by: Darrick J. Wong Reviewed-by: Brian Foster Reviewed-by: Carlos Maiolino --- fs/xfs/libxfs/xfs_da_btree.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'fs/xfs') diff --git a/fs/xfs/libxfs/xfs_da_btree.c b/fs/xfs/libxfs/xfs_da_btree.c index 8ffe17b223da..376bee94b5dd 100644 --- a/fs/xfs/libxfs/xfs_da_btree.c +++ b/fs/xfs/libxfs/xfs_da_btree.c @@ -1523,8 +1523,10 @@ xfs_da3_node_lookup_int( break; } - blk->magic = XFS_DA_NODE_MAGIC; + if (magic != XFS_DA_NODE_MAGIC && magic != XFS_DA3_NODE_MAGIC) + return -EFSCORRUPTED; + blk->magic = XFS_DA_NODE_MAGIC; /* * Search an intermediate node for a match. -- cgit v1.2.3