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| author | Darrick J. Wong | 2018-08-01 16:40:48 +0200 |
|---|---|---|
| committer | Darrick J. Wong | 2018-08-01 16:42:43 +0200 |
| commit | 56830d6cc114f76f656d5e65ab355b070d5a695e (patch) | |
| tree | f42379c8e711f80b3da29580490592c82a7c841d /fs/xfs/libxfs/xfs_da_btree.c | |
| parent | xfs: use a local variable for magic number in xfs_da3_node_lookup_int (diff) | |
| download | kernel-qcow2-linux-56830d6cc114f76f656d5e65ab355b070d5a695e.tar.gz kernel-qcow2-linux-56830d6cc114f76f656d5e65ab355b070d5a695e.tar.xz kernel-qcow2-linux-56830d6cc114f76f656d5e65ab355b070d5a695e.zip | |
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 <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Diffstat (limited to 'fs/xfs/libxfs/xfs_da_btree.c')
| -rw-r--r-- | fs/xfs/libxfs/xfs_da_btree.c | 4 |
1 files changed, 3 insertions, 1 deletions
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. |