7.3-stable review patch. If anyone has any objections, please let me know. ------------------ From: Darrick J. Wong commit 43030b72a11a532e7e3c21ac84a8625425b4201b upstream. LOLLM complains that we fail to flag dabtree blocks that should never be associated with the file fork -- data forks can't point to xattr leaves, and attr forks can't point to dirent blocks. Add the missing checks. Cc: stable@vger.kernel.org # v4.15 Fixes: 7c4a07a424c18d ("xfs: scrub directory/attribute btrees") Signed-off-by: Darrick J. Wong Assisted-by: LOLLM # finding obvious bugs Reviewed-by: Christoph Hellwig Signed-off-by: Carlos Maiolino Signed-off-by: Greg Kroah-Hartman --- fs/xfs/scrub/dabtree.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) --- a/fs/xfs/scrub/dabtree.c +++ b/fs/xfs/scrub/dabtree.c @@ -410,6 +410,10 @@ xchk_da_btree_block( XFS_BLFT_ATTR_LEAF_BUF); blk->magic = XFS_ATTR_LEAF_MAGIC; blk->hashval = xfs_attr_leaf_lasthash(blk->bp, pmaxrecs); + if (dargs->whichfork != XFS_ATTR_FORK) { + xchk_da_set_corrupt(ds, level); + goto out_freebp; + } if (ds->tree_level != 0) xchk_da_set_corrupt(ds, level); break; @@ -419,6 +423,10 @@ xchk_da_btree_block( XFS_BLFT_DIR_LEAFN_BUF); blk->magic = XFS_DIR2_LEAFN_MAGIC; blk->hashval = xfs_dir2_leaf_lasthash(ip, blk->bp, pmaxrecs); + if (dargs->whichfork != XFS_DATA_FORK) { + xchk_da_set_corrupt(ds, level); + goto out_freebp; + } if (ds->tree_level != 0) xchk_da_set_corrupt(ds, level); break; @@ -428,6 +436,10 @@ xchk_da_btree_block( XFS_BLFT_DIR_LEAF1_BUF); blk->magic = XFS_DIR2_LEAF1_MAGIC; blk->hashval = xfs_dir2_leaf_lasthash(ip, blk->bp, pmaxrecs); + if (dargs->whichfork != XFS_DATA_FORK) { + xchk_da_set_corrupt(ds, level); + goto out_freebp; + } if (ds->tree_level != 0) xchk_da_set_corrupt(ds, level); break;