Darrick J. Wong cd87d86792 xfs: don't crash on unexpected holes in dir/attr btrees ... In quite a few places we call xfs_da_read_buf with a mappedbno that we don't control, then assume that the function passes back either an error code or a buffer pointer. Unfortunately, if mappedbno == -2 and bno maps to a hole, we get a return code of zero and a NULL buffer, which means that we crash if we actually try to use that buffer pointer. This happens immediately when we set the buffer type for transaction context. Therefore, check that we have no error code and a non-NULL bp before trying to use bp. This patch is a follow-up to an incomplete fix in 96a3aefb8f ("xfs: don't crash if reading a directory results in an unexpected hole"). Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>		2017-07-07 18:55:17 -07:00
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xfs_ag_resv.c	xfs: remove unneeded parameter from XFS_TEST_ERROR	2017-06-27 18:23:20 -07:00
xfs_ag_resv.h	xfs: set up per-AG free space reservations	2016-09-19 10:30:52 +10:00
xfs_alloc_btree.c	xfs: always compile the btree inorder check functions	2017-06-19 14:11:33 -07:00
xfs_alloc_btree.h
xfs_alloc.c	xfs: remove unneeded parameter from XFS_TEST_ERROR	2017-06-27 18:23:20 -07:00
xfs_alloc.h	xfs: export various function for the online scrubber	2017-06-19 14:11:34 -07:00
xfs_attr_leaf.c	xfs: don't crash on unexpected holes in dir/attr btrees	2017-07-07 18:55:17 -07:00
xfs_attr_leaf.h	Merge branch 'xfs-4.10-misc-fixes-3' into for-next	2016-12-07 17:42:30 +11:00
xfs_attr_remote.c	xfs: pass along transaction context when reading xattr block buffers	2017-06-20 10:45:22 -07:00
xfs_attr_remote.h
xfs_attr_sf.h	xfs: remove double-underscore integer types	2017-06-19 14:11:33 -07:00
xfs_attr.c	xfs: pass along transaction context when reading xattr block buffers	2017-06-20 10:45:22 -07:00
xfs_bit.c	libxfs: Optimize the loop for xfs_bitmap_empty	2016-01-04 16:10:19 +11:00
xfs_bit.h	xfs: remove double-underscore integer types	2017-06-19 14:11:33 -07:00
xfs_bmap_btree.c	xfs: plumb in needed functions for range querying of various btrees	2017-06-19 14:11:34 -07:00
xfs_bmap_btree.h	xfs: simplify validation of the unwritten extent bit	2017-04-25 09:40:41 -07:00
xfs_bmap.c	xfs: remove unneeded parameter from XFS_TEST_ERROR	2017-06-27 18:23:20 -07:00
xfs_bmap.h	xfs: try to avoid blowing out the transaction reservation when bunmaping a shared extent	2017-06-19 08:59:10 -07:00
xfs_btree.c	xfs: remove unneeded parameter from XFS_TEST_ERROR	2017-06-27 18:23:20 -07:00
xfs_btree.h	xfs: export various function for the online scrubber	2017-06-19 14:11:34 -07:00
xfs_cksum.h	xfs: remove double-underscore integer types	2017-06-19 14:11:33 -07:00
xfs_da_btree.c	xfs: don't crash on unexpected holes in dir/attr btrees	2017-07-07 18:55:17 -07:00
xfs_da_btree.h	xfs: remove double-underscore integer types	2017-06-19 14:11:33 -07:00
xfs_da_format.c	xfs: remove double-underscore integer types	2017-06-19 14:11:33 -07:00
xfs_da_format.h	xfs: remove double-underscore integer types	2017-06-19 14:11:33 -07:00
xfs_defer.c	xfs: defer should abort intent items if the trans roll fails	2016-10-24 14:21:18 +11:00
xfs_defer.h	xfs: implement deferred bmbt map/unmap operations	2016-10-04 11:05:44 -07:00
xfs_dir2_block.c	xfs: don't crash on unexpected holes in dir/attr btrees	2017-07-07 18:55:17 -07:00
xfs_dir2_data.c	Merge branch 'xfs-4.10-misc-fixes-3' into for-next	2016-12-07 17:42:30 +11:00
xfs_dir2_leaf.c	xfs: don't crash on unexpected holes in dir/attr btrees	2017-07-07 18:55:17 -07:00
xfs_dir2_node.c	xfs: return the hash value of a leaf1 directory block	2017-06-20 10:45:21 -07:00
xfs_dir2_priv.h	xfs: pass along transaction context when reading directory block buffers	2017-06-20 10:45:22 -07:00
xfs_dir2_sf.c	xfs: remove double-underscore integer types	2017-06-19 14:11:33 -07:00
xfs_dir2.c	xfs: remove unneeded parameter from XFS_TEST_ERROR	2017-06-27 18:23:20 -07:00
xfs_dir2.h	xfs: remove double-underscore integer types	2017-06-19 14:11:33 -07:00
xfs_dquot_buf.c	xfs: simplify xfs_calc_dquots_per_chunk	2017-04-12 08:42:51 -07:00
xfs_format.h	xfs: rename MAXPATHLEN to XFS_SYMLINK_MAXLEN	2017-07-07 08:37:26 -07:00
xfs_fs.h	xfs: remove double-underscore integer types	2017-06-19 14:11:33 -07:00
xfs_ialloc_btree.c	xfs: plumb in needed functions for range querying of various btrees	2017-06-19 14:11:34 -07:00
xfs_ialloc_btree.h	xfs: use per-AG reservations for the finobt	2017-01-25 07:49:35 -08:00
xfs_ialloc.c	xfs: remove unneeded parameter from XFS_TEST_ERROR	2017-06-27 18:23:20 -07:00
xfs_ialloc.h	xfs: export _inobt_btrec_to_irec and _ialloc_cluster_alignment for scrub	2017-06-19 14:11:34 -07:00
xfs_inode_buf.c	xfs: remove unneeded parameter from XFS_TEST_ERROR	2017-06-27 18:23:20 -07:00
xfs_inode_buf.h	xfs: export various function for the online scrubber	2017-06-19 14:11:34 -07:00
xfs_inode_fork.c	xfs: simplify validation of the unwritten extent bit	2017-04-25 09:40:41 -07:00
xfs_inode_fork.h	xfs: rework the inline directory verifiers	2017-04-03 12:22:20 -07:00
xfs_log_format.h	xfs: remove double-underscore integer types	2017-06-19 14:11:33 -07:00
xfs_log_recover.h	xfs: remove double-underscore integer types	2017-06-19 14:11:33 -07:00
xfs_log_rlimit.c	xfs: move most of xfs_sb.h to xfs_format.h	2014-11-28 14:27:09 +11:00
xfs_quota_defs.h	xfs: grab dquots without taking the ilock	2017-06-27 18:23:22 -07:00
xfs_refcount_btree.c	xfs: always compile the btree inorder check functions	2017-06-19 14:11:33 -07:00
xfs_refcount_btree.h	xfs: use the actual AG length when reserving blocks	2017-01-03 18:39:33 -08:00
xfs_refcount.c	xfs: remove unneeded parameter from XFS_TEST_ERROR	2017-06-27 18:23:20 -07:00
xfs_refcount.h	xfs: try to avoid blowing out the transaction reservation when bunmaping a shared extent	2017-06-19 08:59:10 -07:00
xfs_rmap_btree.c	xfs: always compile the btree inorder check functions	2017-06-19 14:11:33 -07:00
xfs_rmap_btree.h	xfs: use the actual AG length when reserving blocks	2017-01-03 18:39:33 -08:00
xfs_rmap.c	xfs: remove unneeded parameter from XFS_TEST_ERROR	2017-06-27 18:23:20 -07:00
xfs_rmap.h	xfs: export various function for the online scrubber	2017-06-19 14:11:34 -07:00
xfs_rtbitmap.c	xfs: export various function for the online scrubber	2017-06-19 14:11:34 -07:00
xfs_sb.c	xfs: remove double-underscore integer types	2017-06-19 14:11:33 -07:00
xfs_sb.h	xfs: remove unused function definitions	2016-02-08 14:58:07 +11:00
xfs_shared.h	xfs: define the on-disk refcount btree format	2016-10-03 09:11:18 -07:00
xfs_symlink_remote.c	xfs: rename MAXPATHLEN to XFS_SYMLINK_MAXLEN	2017-07-07 08:37:26 -07:00
xfs_trans_resv.c	xfs: rename MAXPATHLEN to XFS_SYMLINK_MAXLEN	2017-07-07 08:37:26 -07:00
xfs_trans_resv.h	xfs: increase log reservations for reflink	2016-10-05 16:26:29 -07:00
xfs_trans_space.h	xfs: reserve enough blocks to handle btree splits when remapping	2017-05-03 13:21:40 -07:00
xfs_types.h	xfs: remove double-underscore integer types	2017-06-19 14:11:33 -07:00