xfs: check da node magic in _node_lookup_int
authorDarrick J. Wong <darrick.wong@oracle.com>
Wed, 1 Aug 2018 14:40:48 +0000 (07:40 -0700)
committerDarrick J. Wong <darrick.wong@oracle.com>
Wed, 1 Aug 2018 14:42:43 +0000 (07:42 -0700)
commit56830d6cc114f76f656d5e65ab355b070d5a695e
treef42379c8e711f80b3da29580490592c82a7c841d
parent611995db2ce210d20d51c5270639b750476534e5
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>
fs/xfs/libxfs/xfs_da_btree.c