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xfs: check owner of dir3 free blocks 

Check the owner field of dir3 free block headers and reject the metadata
if there's something wrong with it.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Allison Collins <allison.henderson@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
This commit is contained in:
Darrick J. Wong 2020-03-11 10:37:56 -07:00
parent 1cb5deb5bc
commit 6fb5aac733
1 changed files with 2 additions and 0 deletions
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2
fs/xfs/libxfs/xfs_dir2_node.c
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@ -194,6 +194,8 @@ xfs_dir3_free_header_check(
return __this_address;
if (be32_to_cpu(hdr3->nvalid) < be32_to_cpu(hdr3->nused))
return __this_address;
if (be64_to_cpu(hdr3->hdr.owner) != dp->i_ino)
return __this_address;
} else {
struct xfs_dir2_free_hdr *hdr = bp->b_addr;