Eric Sandeen ae668cd567 xfs: do not propagate ENODATA disk errors into xattr code ... ENODATA (aka ENOATTR) has a very specific meaning in the xfs xattr code; namely, that the requested attribute name could not be found. However, a medium error from disk may also return ENODATA. At best, this medium error may escape to userspace as "attribute not found" when in fact it's an IO (disk) error. At worst, we may oops in xfs_attr_leaf_get() when we do: error = xfs_attr_leaf_hasname(args, &bp); if (error == -ENOATTR) { xfs_trans_brelse(args->trans, bp); return error; } because an ENODATA/ENOATTR error from disk leaves us with a null bp, and the xfs_trans_brelse will then null-deref it. As discussed on the list, we really need to modify the lower level IO functions to trap all disk errors and ensure that we don't let unique errors like this leak up into higher xfs functions - many like this should be remapped to EIO. However, this patch directly addresses a reported bug in the xattr code, and should be safe to backport to stable kernels. A larger-scope patch to handle more unique errors at lower levels can follow later. (Note, prior to 07120f1abd we did not oops, but we did return the wrong error code to userspace.) Signed-off-by: Eric Sandeen <sandeen@redhat.com> Fixes: 07120f1abd ("xfs: Add xfs_has_attr and subroutines") Cc: stable@vger.kernel.org # v5.9+ Reviewed-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Carlos Maiolino <cem@kernel.org>		2025-08-26 11:00:33 +02:00
..
xfs_ag.c	xfs: remove the flags argument to xfs_buf_get_uncached	2025-03-18 14:47:45 +01:00
xfs_ag.h	xfs: move the min and max group block numbers to xfs_group	2024-11-05 13:38:44 -08:00
xfs_ag_resv.c	xfs: allow inode-based btrees to reserve space in the data device	2024-12-23 13:06:03 -08:00
xfs_ag_resv.h
xfs_alloc.c	xfs: catch stale AGF/AGF metadata	2025-06-27 14:13:34 +02:00
xfs_alloc.h	xfs: support logging EFIs for realtime extents	2024-11-05 13:38:42 -08:00
xfs_alloc_btree.c	xfs: refactor cmp_key_with_cur routines to take advantage of cmp_int()	2025-07-24 17:30:13 +02:00
xfs_alloc_btree.h
xfs_attr.c	xfs: prepare to reuse the dquot pointer space in struct xfs_inode	2024-12-23 13:06:03 -08:00
xfs_attr.h
xfs_attr_leaf.c
xfs_attr_leaf.h
xfs_attr_remote.c	xfs: do not propagate ENODATA disk errors into xattr code	2025-08-26 11:00:33 +02:00
xfs_attr_remote.h
xfs_attr_sf.h
xfs_bit.c
xfs_bit.h
xfs_bmap.c	xfs: allow block allocator to take an alignment hint	2025-05-07 14:25:31 -07:00
xfs_bmap.h	xfs: allow block allocator to take an alignment hint	2025-05-07 14:25:31 -07:00
xfs_bmap_btree.c	xfs: refactor cmp_key_with_cur routines to take advantage of cmp_int()	2025-07-24 17:30:13 +02:00
xfs_bmap_btree.h	xfs: make xfs_iroot_realloc a bmap btree function	2024-12-23 13:06:02 -08:00
xfs_btree.c	xfs: refactor xfs_btree_diff_two_ptrs() to take advantage of cmp_int()	2025-07-24 17:30:13 +02:00
xfs_btree.h	xfs: refactor xfs_btree_diff_two_ptrs() to take advantage of cmp_int()	2025-07-24 17:30:13 +02:00
xfs_btree_mem.c	xfs: create a shadow rmap btree during realtime rmap repair	2024-12-23 13:06:09 -08:00
xfs_btree_mem.h
xfs_btree_staging.c	xfs: online repair of the realtime rmap btree	2024-12-23 13:06:09 -08:00
xfs_btree_staging.h
xfs_cksum.h
xfs_da_btree.c	xfs: do not propagate ENODATA disk errors into xattr code	2025-08-26 11:00:33 +02:00
xfs_da_btree.h
xfs_da_format.h
xfs_defer.c	xfs: support logging EFIs for realtime extents	2024-11-05 13:38:42 -08:00
xfs_defer.h	xfs: add a realtime flag to the refcount update log redo items	2024-12-23 13:06:11 -08:00
xfs_dir2.c	xfs/libxfs: replace kmalloc() and memcpy() with kmemdup()	2025-01-13 14:58:04 +01:00
xfs_dir2.h	xfs: mark xfs_dir_isempty static	2025-01-13 14:55:06 +01:00
xfs_dir2_block.c
xfs_dir2_data.c
xfs_dir2_leaf.c
xfs_dir2_node.c
xfs_dir2_priv.h
xfs_dir2_sf.c
xfs_dquot_buf.c	xfs: use metadir for quota inodes	2024-11-05 13:38:45 -08:00
xfs_errortag.h	xfs: allow inode-based btrees to reserve space in the data device	2024-12-23 13:06:03 -08:00
xfs_exchmaps.c	xfs: realtime rmap btree transaction reservations	2024-12-23 13:06:04 -08:00
xfs_exchmaps.h
xfs_format.h	fs/xfs: replace strncpy with memtostr_pad()	2025-07-24 17:30:14 +02:00
xfs_fs.h	xfs: enable fsmap reporting for internal RT devices	2025-03-03 08:17:08 -07:00
xfs_group.c	xfs: improve the xg_active_ref check in xfs_group_free	2025-07-24 17:30:14 +02:00
xfs_group.h	xfs: support zone gaps	2025-03-03 08:17:09 -07:00
xfs_health.h	xfs: report realtime refcount btree corruption errors to the health system	2024-12-23 13:06:14 -08:00
xfs_ialloc.c	xfs: catch stale AGF/AGF metadata	2025-06-27 14:13:34 +02:00
xfs_ialloc.h
xfs_ialloc_btree.c	xfs: refactor cmp_key_with_cur routines to take advantage of cmp_int()	2025-07-24 17:30:13 +02:00
xfs_ialloc_btree.h
xfs_iext_tree.c
xfs_inode_buf.c	xfs: kill XBF_UNMAPPED	2025-03-10 14:29:44 +01:00
xfs_inode_buf.h	xfs: enforce metadata inode flag	2024-11-05 13:38:31 -08:00
xfs_inode_fork.c	xfs: wire up a new metafile type for the realtime refcount	2024-12-23 13:06:12 -08:00
xfs_inode_fork.h	xfs: make xfs_iroot_realloc a bmap btree function	2024-12-23 13:06:02 -08:00
xfs_inode_util.c	xfs: define the zoned on-disk format	2025-03-03 08:16:45 -07:00
xfs_inode_util.h
xfs_log_format.h	xfs: define the zoned on-disk format	2025-03-03 08:16:45 -07:00
xfs_log_recover.h	xfs: don't use a xfs_log_iovec for ri_buf in log recovery	2025-07-24 17:30:15 +02:00
xfs_log_rlimit.c	xfs: commit CoW-based atomic writes atomically	2025-05-07 14:25:32 -07:00
xfs_metadir.c	xfs: allow inode-based btrees to reserve space in the data device	2024-12-23 13:06:03 -08:00
xfs_metadir.h	xfs: read and write metadata inode directory tree	2024-11-05 13:38:31 -08:00
xfs_metafile.c	xfs: reduce metafile reservations	2025-03-03 08:16:43 -07:00
xfs_metafile.h	xfs: make metabtree reservations global	2025-03-03 08:16:43 -07:00
xfs_ondisk.h	xfs: define the zoned on-disk format	2025-03-03 08:16:45 -07:00
xfs_parent.c
xfs_parent.h
xfs_quota_defs.h	xfs: use metadir for quota inodes	2024-11-05 13:38:45 -08:00
xfs_refcount.c	xfs: return the allocated transaction from xfs_trans_alloc_empty	2025-07-24 17:30:13 +02:00
xfs_refcount.h	xfs: recover CoW leftovers in the realtime volume	2024-12-23 13:06:13 -08:00
xfs_refcount_btree.c	xfs: refactor cmp_key_with_cur routines to take advantage of cmp_int()	2025-07-24 17:30:13 +02:00
xfs_refcount_btree.h
xfs_rmap.c	xfs: update rmap to allow cow staging extents in the rt rmap	2024-12-23 13:06:12 -08:00
xfs_rmap.h	xfs: add a realtime flag to the rmap update log redo items	2024-12-23 13:06:04 -08:00
xfs_rmap_btree.c	xfs: refactor cmp_key_with_cur routines to take advantage of cmp_int()	2025-07-24 17:30:13 +02:00
xfs_rmap_btree.h
xfs_rtbitmap.c	xfs: define the zoned on-disk format	2025-03-03 08:16:45 -07:00
xfs_rtbitmap.h	xfs: online repair of realtime bitmaps for a realtime group	2024-12-23 13:06:08 -08:00
xfs_rtgroup.c	xfs: define the zoned on-disk format	2025-03-03 08:16:45 -07:00
xfs_rtgroup.h	xfs: support zone gaps	2025-03-03 08:17:09 -07:00
xfs_rtrefcount_btree.c	xfs: refactor cmp_key_with_cur routines to take advantage of cmp_int()	2025-07-24 17:30:13 +02:00
xfs_rtrefcount_btree.h	xfs: create routine to allocate and initialize a realtime refcount btree inode	2024-12-23 13:06:12 -08:00
xfs_rtrmap_btree.c	xfs: refactor cmp_key_with_cur routines to take advantage of cmp_int()	2025-07-24 17:30:13 +02:00
xfs_rtrmap_btree.h	xfs: add a xfs_rtrmap_highest_rgbno helper	2025-03-03 08:16:45 -07:00
xfs_sb.c	xfs: Remove duplicate xfs_rtbitmap.h header	2025-03-12 10:00:43 +01:00
xfs_sb.h	xfs: make xfs_rtblock_t a segmented address like xfs_fsblock_t	2024-11-05 13:38:44 -08:00
xfs_shared.h	xfs: introduce realtime refcount btree ondisk definitions	2024-12-23 13:06:10 -08:00
xfs_symlink_remote.c	xfs: return from xfs_symlink_verify early on V4 filesystems	2024-12-12 17:45:13 -08:00
xfs_symlink_remote.h
xfs_trans_inode.c
xfs_trans_resv.c	xfs: allow sysadmins to specify a maximum atomic write limit at mount time	2025-05-07 14:25:33 -07:00
xfs_trans_resv.h	xfs: allow sysadmins to specify a maximum atomic write limit at mount time	2025-05-07 14:25:33 -07:00
xfs_trans_space.c
xfs_trans_space.h	xfs: realtime rmap btree transaction reservations	2024-12-23 13:06:04 -08:00
xfs_types.c	xfs: make xfs_rtblock_t a segmented address like xfs_fsblock_t	2024-11-05 13:38:44 -08:00
xfs_types.h	xfs: add support for zoned space reservations	2025-03-03 08:17:07 -07:00
xfs_zones.c	xfs: support zone gaps	2025-03-03 08:17:09 -07:00
xfs_zones.h	xfs: parse and validate hardware zone information	2025-03-03 08:16:46 -07:00