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Benjamin Coddington 3a4ce14d9a nfs/blocklayout: Don't attempt unregister for invalid block device 
Since commit d869da91cccb ("nfs/blocklayout: Fix premature PR key
unregistration") an unmount of a pNFS SCSI layout-enabled NFS may
dereference a NULL block_device in:

  bl_unregister_scsi+0x16/0xe0 [blocklayoutdriver]
  bl_free_device+0x70/0x80 [blocklayoutdriver]
  bl_free_deviceid_node+0x12/0x30 [blocklayoutdriver]
  nfs4_put_deviceid_node+0x60/0xc0 [nfsv4]
  nfs4_deviceid_purge_client+0x132/0x190 [nfsv4]
  unset_pnfs_layoutdriver+0x59/0x60 [nfsv4]
  nfs4_destroy_server+0x36/0x70 [nfsv4]
  nfs_free_server+0x23/0xe0 [nfs]
  deactivate_locked_super+0x30/0xb0
  cleanup_mnt+0xba/0x150
  task_work_run+0x59/0x90
  syscall_exit_to_user_mode+0x217/0x220
  do_syscall_64+0x8e/0x160

This happens because even though we were able to create the
nfs4_deviceid_node, the lookup for the device was unable to attach the
block device to the pnfs_block_dev.

If we never found a block device to register, we can avoid this case with
the PNFS_BDEV_REGISTERED flag.  Move the deref behind the test for the
flag.

Fixes: d869da91cccb ("nfs/blocklayout: Fix premature PR key unregistration")
Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2024-11-28 12:55:32 -05:00
..
9p
Revert patches causing inode collision problems
2024-10-25 15:25:02 -07:00
adfs
move asm/unaligned.h to linux/unaligned.h
2024-10-02 17:23:23 -04:00
affs
affs-for-6.12-tag
2024-09-16 13:07:59 +02:00
afs
vfs-6.12-rc6.fixes
2024-11-01 07:37:10 -10:00
autofs
autofs: fix thinko in validate_dev_ioctl()
2024-10-28 13:16:56 +01:00
bcachefs
bcachefs fixes for 6.12-rc6
2024-11-01 07:21:03 -10:00
befs
befs: Convert befs_symlink_read_folio() to use folio_end_read()
2024-05-31 12:31:39 +02:00
bfs
fs: Convert aops->write_begin to take a folio
2024-08-07 11:33:21 +02:00
btrfs
for-6.12-rc5-tag
2024-11-01 07:31:47 -10:00
cachefiles
cachefiles: fix dentry leak in cachefiles_open_file()
2024-09-27 18:29:19 +02:00
ceph
A fix from Patrick for a variety of CephFS lockup scenarios caused by
2024-10-04 10:10:23 -07:00
coda
coda: use param->file for FSCONFIG_SET_FD
2024-08-19 13:45:03 +02:00
configfs
fs/configfs: Add a callback to determine attribute visibility
2024-06-17 20:42:57 +02:00
cramfs
vfs-6.11.module.description
2024-07-15 11:14:59 -07:00
crypto
move asm/unaligned.h to linux/unaligned.h
2024-10-02 17:23:23 -04:00
debugfs
[tree-wide] finally take no_llseek out
2024-09-27 08:18:43 -07:00
devpts
…
dlm
[tree-wide] finally take no_llseek out
2024-09-27 08:18:43 -07:00
ecryptfs
move asm/unaligned.h to linux/unaligned.h
2024-10-02 17:23:23 -04:00
efivarfs
[tree-wide] finally take no_llseek out
2024-09-27 08:18:43 -07:00
efs
vfs-6.11.module.description
2024-07-15 11:14:59 -07:00
erofs
erofs: use get_tree_bdev_flags() to avoid misleading messages
2024-10-21 14:30:27 +02:00
exfat
move asm/unaligned.h to linux/unaligned.h
2024-10-02 17:23:23 -04:00
exportfs
fhandle: relax open_by_handle_at() permission checks
2024-05-28 15:57:23 +02:00
ext2
vfs-6.12.file
2024-09-16 09:14:02 +02:00
ext4
ext4: fix off by one issue in alloc_flex_gd()
2024-10-04 17:36:28 -04:00
f2fs
f2fs: allow parallel DIO reads
2024-10-11 15:12:07 +00:00
fat
fat: fix uninitialized variable
2024-10-17 00:28:06 -07:00
freevxfs
freevxfs: Convert freevxfs to the new mount API.
2024-03-26 09:04:53 +01:00
fuse
fuse: remove stray debug line
2024-10-25 17:05:49 +02:00
gfs2
gfs2 changes
2024-09-23 11:55:17 -07:00
hfs
fs: Convert aops->write_begin to take a folio
2024-08-07 11:33:21 +02:00
hfsplus
move asm/unaligned.h to linux/unaligned.h
2024-10-02 17:23:23 -04:00
hostfs
fs: Convert aops->write_begin to take a folio
2024-08-07 11:33:21 +02:00
hpfs
move asm/unaligned.h to linux/unaligned.h
2024-10-02 17:23:23 -04:00
hugetlbfs
fs: Convert aops->write_begin to take a folio
2024-08-07 11:33:21 +02:00
iomap
vfs-6.12-rc6.iomap
2024-11-01 07:45:00 -10:00
isofs
move asm/unaligned.h to linux/unaligned.h
2024-10-02 17:23:23 -04:00
jbd2
jbd2: remove unneeded check of ret in jbd2_fc_get_buf
2024-08-26 23:49:15 -04:00
jffs2
jffs2: Use a folio in jffs2_garbage_collect_dnode()
2024-08-19 13:40:00 +02:00
jfs
jfs: Fix sanity check in dbMount
2024-10-22 09:40:37 -05:00
kernfs
kernfs: mount: Remove unnecessary ‘NULL’ values from knparent
2024-05-04 19:02:39 +02:00
lockd
move asm/unaligned.h to linux/unaligned.h
2024-10-02 17:23:23 -04:00
minix
buffer: Convert __block_write_begin() to take a folio
2024-08-07 11:33:36 +02:00
netfs
netfs: Downgrade i_rwsem for a buffered write
2024-10-17 15:33:42 +02:00
nfs
nfs/blocklayout: Don't attempt unregister for invalid block device
2024-11-28 12:55:32 -05:00
nfs_common
nfs_common: fix localio to cope with racing nfs_local_probe()
2024-11-04 10:24:19 -05:00
nfsd
nfsd-6.12 fixes:
2024-11-02 09:27:11 -10:00
nilfs2
nilfs2: fix potential deadlock with newly created symlinks
2024-10-30 20:14:12 -07:00
nls
move asm/unaligned.h to linux/unaligned.h
2024-10-02 17:23:23 -04:00
notify
inotify: Fix possible deadlock in fsnotify_destroy_mark
2024-10-02 15:14:29 +02:00
ntfs3
Changes for 6.12-rc3
2024-10-08 10:53:06 -07:00
ocfs2
ocfs2: pass u64 to ocfs2_truncate_inline maybe overflow
2024-10-28 21:40:40 -07:00
omfs
fs: Convert aops->write_begin to take a folio
2024-08-07 11:33:21 +02:00
openpromfs
openpromfs: add missing MODULE_DESCRIPTION() macro
2024-06-20 09:46:01 +02:00
orangefs
move asm/unaligned.h to linux/unaligned.h
2024-10-02 17:23:23 -04:00
overlayfs
fs: pass offset and result to backing_file end_write() callback
2024-10-16 13:17:45 +02:00
proc
vfs-6.12-rc5.fixes
2024-10-21 10:48:24 -07:00
pstore
drm next for 6.12-rc1
2024-09-19 10:18:15 +02:00
qnx4
qnx4: add MODULE_DESCRIPTION()
2024-05-28 11:52:53 +02:00
qnx6
qnx6: Convert directory handling to use kmap_local
2024-08-07 11:31:56 +02:00
quota
\n
2024-09-23 10:49:28 -07:00
ramfs
mm: switch mm->get_unmapped_area() to a flag
2024-04-25 20:56:25 -07:00
reiserfs
move asm/unaligned.h to linux/unaligned.h
2024-10-02 17:23:23 -04:00
romfs
romfs: fix romfs_read_folio()
2024-08-21 22:32:58 +02:00
smb
cifs: fix warning when destroy 'cifs_io_request_pool'
2024-10-23 07:42:44 -05:00
squashfs
Squashfs: fix variable overflow in squashfs_readpage_block
2024-10-30 20:14:12 -07:00
sysfs
Merge 6.9-rc5 into driver-core-next
2024-04-23 13:27:43 +02:00
sysv
buffer: Convert __block_write_begin() to take a folio
2024-08-07 11:33:36 +02:00
tests
execve: Move KUnit tests to tests/ subdirectory
2024-07-22 18:25:47 -07:00
tracefs
tracing: Fix tracefs mount options
2024-11-01 08:38:14 -04:00
ubifs
[tree-wide] finally take no_llseek out
2024-09-27 08:18:43 -07:00
udf
udf: fix uninit-value use in udf_get_fileshortad
2024-10-02 14:32:37 +02:00
ufs
ufs_rename(): fix bogus argument of folio_release_kmap()
2024-10-02 00:05:09 -04:00
unicode
unicode: Don't special case ignorable code points
2024-10-09 13:34:01 -04:00
vboxsf
fs: Convert aops->write_end to take a folio
2024-08-07 11:32:02 +02:00
verity
fsverity: expose verified fsverity built-in signatures to LSMs
2024-08-20 14:03:18 -04:00
xfs
XFS bug fies for 6.12-rc6
2024-11-02 09:22:16 -10:00
zonefs
zonefs fixes for 6.12-rc2
2024-10-02 12:02:15 -07:00
aio.c
fs/aio: Fix __percpu annotation of *cpu pointer in struct kioctx
2024-08-19 13:45:03 +02:00
anon_inodes.c
fs: Create anon_inode_getfile_fmode()
2024-04-26 10:33:05 +02:00
attr.c
nfsd-6.11 fixes:
2024-08-29 06:20:44 +12:00
backing-file.c
fs: pass offset and result to backing_file end_write() callback
2024-10-16 13:17:45 +02:00
bad_inode.c
…
binfmt_elf_fdpic.c
binfmt_elf_fdpic: fix AUXV size calculation when ELF_HWCAP2 is defined
2024-08-26 13:00:38 -07:00
binfmt_elf.c
Revert "binfmt_elf, coredump: Log the reason of the failed core dumps"
2024-09-26 11:39:02 -07:00
binfmt_flat.c
move asm/unaligned.h to linux/unaligned.h
2024-10-02 17:23:23 -04:00
binfmt_misc.c
vfs-6.11.module.description
2024-07-15 11:14:59 -07:00
binfmt_script.c
fs: binfmt: add missing MODULE_DESCRIPTION() macros
2024-05-28 12:06:51 +02:00
bpf_fs_kfuncs.c
bpf: Add kfunc bpf_get_dentry_xattr() to read xattr from dentry
2024-08-07 11:26:54 -07:00
buffer.c
vfs-6.12.folio
2024-09-16 08:54:30 +02:00
char_dev.c
…
compat_binfmt_elf.c
…
coredump.c
Revert "binfmt_elf, coredump: Log the reason of the failed core dumps"
2024-09-26 11:39:02 -07:00
d_path.c
…
dax.c
fsdax: dax_unshare_iter needs to copy entire blocks
2024-10-07 13:51:47 +02:00
dcache.c
vfs-6.12.misc
2024-09-16 08:35:09 +02:00
direct-io.c
fs/direct-io: Remove linux/prefetch.h include
2024-08-19 13:45:02 +02:00
drop_caches.c
sysctl: treewide: constify the ctl_table argument of proc_handlers
2024-07-24 20:59:29 +02:00
eventfd.c
introduce fd_file(), convert all accessors to it.
2024-08-12 22:00:43 -04:00
eventpoll.c
struct fd layout change (and conversion to accessor helpers)
2024-09-23 09:35:36 -07:00
exec.c
ALong with the usual shower of singleton patches, notable patch series in
2024-09-21 07:29:05 -07:00
fcntl.c
struct fd layout change (and conversion to accessor helpers)
2024-09-23 09:35:36 -07:00
fhandle.c
struct fd layout change (and conversion to accessor helpers)
2024-09-23 09:35:36 -07:00
file_table.c
slab updates for 6.12
2024-09-18 08:53:53 +02:00
file.c
close_range(): fix the logics in descriptor table trimming
2024-09-29 21:52:29 -04:00
filesystems.c
…
fs_context.c
…
fs_parser.c
fs_parse: add uid & gid option option parsing helpers
2024-07-02 06:20:49 +02:00
fs_pin.c
…
fs_struct.c
…
fs_types.c
…
fs-writeback.c
inode: port __I_SYNC to var event
2024-08-30 08:22:39 +02:00
fsopen.c
[tree-wide] finally take no_llseek out
2024-09-27 08:18:43 -07:00
init.c
…
inode.c
bcachefs: do not use PF_MEMALLOC_NORECLAIM
2024-10-09 12:47:18 -07:00
internal.h
file: reclaim 24 bytes from f_owner
2024-08-28 13:05:39 +02:00
ioctl.c
introduce fd_file(), convert all accessors to it.
2024-08-12 22:00:43 -04:00
Kconfig
nfs_common: fix Kconfig for NFS_COMMON_LOCALIO_SUPPORT
2024-10-03 16:19:51 -04:00
Kconfig.binfmt
exec: Add KUnit test for bprm_stack_limits()
2024-06-19 13:13:55 -07:00
kernel_read_file.c
introduce fd_file(), convert all accessors to it.
2024-08-12 22:00:43 -04:00
libfs.c
vfs-6.12.folio
2024-09-16 08:54:30 +02:00
locks.c
struct fd layout change (and conversion to accessor helpers)
2024-09-23 09:35:36 -07:00
Makefile
bpf: introduce new VFS based BPF kfuncs
2024-08-06 09:01:41 -07:00
mbcache.c
…
mnt_idmapping.c
fuse update for 6.12
2024-09-24 15:29:42 -07:00
mount.h
vfs-6.12.mount
2024-09-16 11:15:26 +02:00
mpage.c
buffer: Remove calls to set and clear the folio error flag
2024-05-31 12:31:43 +02:00
namei.c
struct fd layout change (and conversion to accessor helpers)
2024-09-23 09:35:36 -07:00
namespace.c
fs: don't try and remove empty rbtree node
2024-10-17 15:33:43 +02:00
nsfs.c
[tree-wide] finally take no_llseek out
2024-09-27 08:18:43 -07:00
open.c
openat2: explicitly return -E2BIG for (usize > PAGE_SIZE)
2024-10-10 12:09:03 +02:00
pidfs.c
pidfs: check for valid pid namespace
2024-09-27 18:29:19 +02:00
pipe.c
[tree-wide] finally take no_llseek out
2024-09-27 08:18:43 -07:00
pnode.c
…
pnode.h
…
posix_acl.c
fs: Use in_group_or_capable() helper to simplify the code
2024-08-30 08:22:37 +02:00
proc_namespace.c
fs: rename show_mnt_opts -> show_vfsmnt_opts
2024-06-28 14:36:43 +02:00
read_write.c
struct fd layout change (and conversion to accessor helpers)
2024-09-23 09:35:36 -07:00
readdir.c
introduce fd_file(), convert all accessors to it.
2024-08-12 22:00:43 -04:00
remap_range.c
introduce fd_file(), convert all accessors to it.
2024-08-12 22:00:43 -04:00
select.c
struct fd layout change (and conversion to accessor helpers)
2024-09-23 09:35:36 -07:00
seq_file.c
seq_file: Simplify __seq_puts()
2024-05-02 16:28:20 +02:00
signalfd.c
struct fd layout change (and conversion to accessor helpers)
2024-09-23 09:35:36 -07:00
splice.c
introduce fd_file(), convert all accessors to it.
2024-08-12 22:00:43 -04:00
stack.c
…
stat.c
introduce fd_file(), convert all accessors to it.
2024-08-12 22:00:43 -04:00
statfs.c
introduce fd_file(), convert all accessors to it.
2024-08-12 22:00:43 -04:00
super.c
fs/super.c: introduce get_tree_bdev_flags()
2024-10-21 14:30:26 +02:00
sync.c
introduce fd_file(), convert all accessors to it.
2024-08-12 22:00:43 -04:00
sysctls.c
…
timerfd.c
introduce fd_file(), convert all accessors to it.
2024-08-12 22:00:43 -04:00
userfaultfd.c
fork: do not invoke uffd on fork if error occurs
2024-10-28 21:40:38 -07:00
utimes.c
introduce fd_file(), convert all accessors to it.
2024-08-12 22:00:43 -04:00
xattr.c
introduce fd_file(), convert all accessors to it.
2024-08-12 22:00:43 -04:00