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Trond Myklebust 34769f17e4 NFSv4: Fix deadlock between nfs4_evict_inode() and nfs4_opendata_get_inode() 
[ Upstream commit dfe1fe75e00e4c724ede7b9e593f6f680e446c5f ]

If the inode is being evicted, but has to return a delegation first,
then it can cause a deadlock in the corner case where the server reboots
before the delegreturn completes, but while the call to iget5_locked() in
nfs4_opendata_get_inode() is waiting for the inode free to complete.
Since the open call still holds a session slot, the reboot recovery
cannot proceed.

In order to break the logjam, we can turn the delegation return into a
privileged operation for the case where we're evicting the inode. We
know that in that case, there can be no other state recovery operation
that conflicts.

Reported-by: zhangxiaoxu (A) <zhangxiaoxu5@huawei.com>
Fixes: 5fcdfacc01f3 ("NFSv4: Return delegations synchronously in evict_inode")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-06-16 11:59:44 +02:00
..
9p
9P: Cast to loff_t before multiplying
2020-11-05 11:43:34 +01:00
adfs
Merge branch 'work.adfs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 11:33:22 -07:00
affs
fs/affs: release old buffer head on error path
2021-03-04 10:26:48 +01:00
afs
afs: Stop listxattr() from listing "afs.*" attributes
2021-03-24 11:26:37 +01:00
autofs
autofs: fix a leak in autofs_expire_indirect()
2019-10-25 00:03:11 -04:00
befs
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
bfs
bfs: don't use WARNING: string when it's just info.
2021-01-06 14:48:39 +01:00
btrfs
btrfs: promote debugging asserts to full-fledged checks in validate_super
2021-06-16 11:59:40 +02:00
cachefiles
cachefiles: Handle readpage error correctly
2020-11-05 11:43:36 +01:00
ceph
ceph: fix fscache invalidation
2021-05-22 11:38:29 +02:00
cifs
SMB3: incorrect file id in requests compounded with open
2021-06-03 08:59:12 +02:00
coda
y2038: add inode timestamp clamping
2019-09-19 09:42:37 -07:00
configfs
configfs: fix a use-after-free in __configfs_open_file
2021-03-17 17:03:56 +01:00
cramfs
cramfs: fix usage on non-MTD device
2019-11-23 21:44:49 -05:00
crypto
fscrypt: remove kernel-internal constants from UAPI header
2021-01-06 14:48:35 +01:00
debugfs
debugfs: do not attempt to create a new file before the filesystem is initalized
2021-03-04 10:26:10 +01:00
devpts
devpts_pty_kill(): don't bother with d_delete()
2019-09-03 09:30:56 -04:00
dlm
fs: dlm: fix debugfs dump
2021-05-19 10:08:20 +02:00
ecryptfs
Revert "ecryptfs: replace BUG_ON with error handling code"
2021-05-26 12:05:19 +02:00
efivarfs
efivarfs: revert "fix memory leak in efivarfs_create()"
2020-12-02 08:49:53 +01:00
efs
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
erofs
erofs: add unsupported inode i_format check
2021-05-11 14:04:02 +02:00
exportfs
exportfs_decode_fh(): negative pinned may become positive without the parent locked
2019-11-10 11:56:05 -05:00
ext2
ext2: don't update mtime on COW faults
2020-09-09 19:12:30 +02:00
ext4
ext4: fix bug on in ext4_es_cache_extent as ext4_split_extent_at failed
2021-06-10 13:37:11 +02:00
f2fs
f2fs: fix error handling in f2fs_end_enable_verity()
2021-05-19 10:08:32 +02:00
fat
fat: don't allow to mount if the FAT length == 0
2020-06-17 16:40:36 +02:00
freevxfs
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
fscache
…
fuse
cuse: prevent clone
2021-05-19 10:08:22 +02:00
gfs2
gfs2: report "already frozen/thawed" errors
2021-04-16 11:46:37 +02:00
hfs
…
hfsplus
hfsplus: prevent corruption in shrinking truncate
2021-05-19 10:08:29 +02:00
hostfs
hostfs: fix memory handling in follow_link()
2021-04-14 08:24:14 +02:00
hpfs
fs: hpfs: Initialize filesystem timestamp ranges
2019-08-30 08:11:25 -07:00
hugetlbfs
mm/hugetlb: fix F_SEAL_FUTURE_WRITE
2021-05-19 10:08:29 +02:00
iomap
iomap: fix sub-page uptodate handling
2021-05-19 10:08:30 +02:00
isofs
isofs: release buffer head before return
2021-03-04 10:26:30 +01:00
jbd2
jbd2: fix up sparse warnings in checkpoint code
2020-11-18 19:20:30 +01:00
jffs2
jffs2: check the validity of dstlen in jffs2_zlib_compress()
2021-05-11 14:04:16 +02:00
jfs
JFS: more checks for invalid superblock
2021-03-07 12:20:41 +01:00
kernfs
kernfs: do not call fsnotify() with name without a parent
2020-08-19 08:16:12 +02:00
lockd
lockd: don't use interval-based rebinding over TCP
2020-12-30 11:51:16 +01:00
minix
fs/minix: remove expected error message in block_to_path()
2020-08-21 13:05:37 +02:00
nfs
NFSv4: Fix deadlock between nfs4_evict_inode() and nfs4_opendata_get_inode()
2021-06-16 11:59:44 +02:00
nfs_common
nfs_common: need lock during iterate through the list
2020-12-30 11:51:22 +01:00
nfsd
NFSD: fix error handling in NFSv4.0 callbacks
2021-04-07 14:47:39 +02:00
nilfs2
nilfs2: fix null pointer dereference at nilfs_segctor_do_construct()
2020-06-17 16:40:29 +02:00
nls
…
notify
fanotify: fix ignore mask logic for events on child and on dir
2020-06-17 16:40:24 +02:00
ntfs
ntfs: check for valid standard information attribute
2021-02-26 10:10:27 +01:00
ocfs2
ocfs2: fix data corruption by fallocate
2021-06-10 13:37:12 +02:00
omfs
fs: omfs: Initialize filesystem timestamp ranges
2019-08-30 08:11:25 -07:00
openpromfs
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
orangefs
orangefs: get rid of knob code...
2020-08-21 13:05:29 +02:00
overlayfs
ovl: fix missing revert_creds() on error path
2021-05-14 09:44:16 +02:00
proc
proc: Track /proc/$pid/attr/ opener mm_struct
2021-06-16 11:59:32 +02:00
pstore
pstore: Fix typo in compression option name
2021-03-04 10:26:45 +01:00
qnx4
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
qnx6
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
quota
quota: Fix memory leak when handling corrupted quota file
2021-03-04 10:26:26 +01:00
ramfs
ramfs: fix nommu mmap with gaps in the page cache
2020-10-29 09:57:53 +01:00
reiserfs
reiserfs: update reiserfs_xattrs_initialized() condition
2021-04-07 14:47:43 +02:00
romfs
romfs: fix uninitialized memory leak in romfs_dev_read()
2020-08-26 10:40:51 +02:00
squashfs
squashfs: fix divide error in calculate_skip()
2021-05-19 10:08:29 +02:00
sysfs
sysfs: Add sysfs_emit and sysfs_emit_at to format sysfs output
2021-03-07 12:20:48 +01:00
sysv
fs: sysv: Initialize filesystem timestamp ranges
2019-08-30 07:27:18 -07:00
tracefs
tracing: Do not create tracefs files if tracefs lockdown is in effect
2019-10-12 20:49:07 -04:00
ubifs
ubifs: Only check replay with inode type to judge if inode linked
2021-05-11 14:04:14 +02:00
udf
udf: fix silent AED tagLocation corruption
2021-03-17 17:03:41 +01:00
ufs
fs/ufs: avoid potential u32 multiplication overflow
2020-08-21 13:05:37 +02:00
unicode
unicode: make array 'token' static const, makes object smaller
2019-09-17 11:48:24 -04:00
verity
fs-verity: support builtin file signatures
2019-08-12 19:33:50 -07:00
xfs
xfs: Fix assert failure in xfs_setattr_size()
2021-03-07 12:20:42 +01:00
aio.c
aio: fix async fsync creds
2020-06-17 16:40:24 +02:00
anon_inodes.c
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
attr.c
utimes: Clamp the timestamps in notify_change()
2020-02-11 04:35:12 -08:00
bad_inode.c
…
binfmt_aout.c
…
binfmt_elf_fdpic.c
…
binfmt_elf.c
fs/binfmt_elf.c: allocate initialized memory in fill_thread_core_info()
2020-06-03 08:21:27 +02:00
binfmt_em86.c
…
binfmt_flat.c
binfmt_flat: revert "binfmt_flat: don't offset the data start"
2020-09-03 11:26:39 +02:00
binfmt_misc.c
binfmt_misc: fix possible deadlock in bm_register_write
2021-03-17 17:03:57 +01:00
binfmt_script.c
…
block_dev.c
block: reexpand iov_iter after read/write
2021-05-22 11:38:29 +02:00
buffer.c
fs: Don't invalidate page buffers in block_write_full_page()
2020-11-05 11:43:24 +01:00
char_dev.c
chardev: Avoid potential use-after-free in 'chrdev_open()'
2020-01-14 20:08:18 +01:00
compat_binfmt_elf.c
…
compat_ioctl.c
fix compat handling of FICLONERANGE, FIDEDUPERANGE and FS_IOC_FIEMAP
2020-01-09 10:20:05 +01:00
compat.c
…
coredump.c
coredump: fix core_pattern parse error
2020-12-11 13:23:30 +01:00
d_path.c
fs: fix NULL dereference due to data race in prepend_path()
2020-10-29 09:57:45 +01:00
dax.c
mm: provide a saner PTE walking API for modules
2021-02-26 10:10:28 +01:00
dcache.c
fix dget_parent() fastpath race
2020-10-01 13:17:19 +02:00
dcookies.c
…
direct-io.c
fs: direct-io: fix missing sdio->boundary
2021-04-14 08:24:11 +02:00
drop_caches.c
fs: avoid softlockups in s_inodes iterators
2020-01-12 12:21:37 +01:00
eventfd.c
eventfd: track eventfd_signal() recursion depth
2020-02-11 04:35:37 -08:00
eventpoll.c
ep_create_wakeup_source(): dentry name can change under you...
2020-10-07 08:01:31 +02:00
exec.c
exec: Transform exec_update_mutex into a rw_semaphore
2021-01-09 13:44:55 +01:00
fcntl.c
fcntl: Fix potential deadlock in send_sig{io, urg}()
2021-01-06 14:48:39 +01:00
fhandle.c
fs/handle.c - fix up kerneldoc
2019-08-07 21:51:47 -04:00
file_table.c
vfs: Export flush_delayed_fput for use by knfsd.
2019-08-19 11:00:39 -04:00
file.c
fix multiplication overflow in copy_fdtable()
2020-05-27 17:46:12 +02:00
filesystems.c
fs/filesystems.c: downgrade user-reachable WARN_ONCE() to pr_warn_once()
2020-04-17 10:50:21 +02:00
fs_context.c
vfs: subtype handling moved to fuse
2019-09-06 21:28:49 +02:00
fs_parser.c
vfs: Make fs_parse() handle fs_param_is_fd-type params better
2019-09-12 21:06:14 -04:00
fs_pin.c
switch the remnants of releasing the mountpoint away from fs_pin
2019-07-16 22:52:37 -04:00
fs_struct.c
…
fs_types.c
…
fs-writeback.c
fs: fix lazytime expiration handling in __writeback_single_inode()
2021-01-30 13:54:11 +01:00
fsopen.c
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
inode.c
futex: Fix inode life-time issue
2020-03-25 08:25:58 +01:00
internal.h
fs: move guard_bio_eod() after bio_set_op_attrs
2020-01-17 19:48:21 +01:00
io_uring.c
io_uring: Fix current->fs handling in io_sq_wq_submit_work()
2021-01-30 13:54:10 +01:00
ioctl.c
compat_ioctl: add compat_ptr_ioctl()
2019-12-17 19:55:30 +01:00
Kconfig
fs-verity for 5.4
2019-09-18 16:59:14 -07:00
Kconfig.binfmt
…
libfs.c
libfs: fix error cast of negative value in simple_attr_write()
2020-11-24 13:29:19 +01:00
locks.c
locks: reinstate locks_delete_block optimization
2020-03-25 08:25:41 +01:00
Makefile
fs-verity for 5.4
2019-09-18 16:59:14 -07:00
mbcache.c
…
mount.h
switch the remnants of releasing the mountpoint away from fs_pin
2019-07-16 22:52:37 -04:00
mpage.c
fs: move guard_bio_eod() after bio_set_op_attrs
2020-01-17 19:48:21 +01:00
namei.c
namei: only return -ECHILD from follow_dotdot_rcu()
2020-03-05 16:43:48 +01:00
namespace.c
fs/namespace.c: WARN if mnt_count has become negative
2021-01-06 14:48:40 +01:00
no-block.c
…
nsfs.c
…
open.c
cifs_atomic_open(): fix double-put on late allocation failure
2020-03-18 07:17:51 +01:00
pipe.c
…
pnode.c
propagate_one(): mnt_set_mountpoint() needs mount_lock
2020-05-02 08:48:44 +02:00
pnode.h
mount: fix mounting of detached mounts onto targets that reside on shared mounts
2021-03-17 17:03:33 +01:00
posix_acl.c
…
proc_namespace.c
vfs: subtype handling moved to fuse
2019-09-06 21:28:49 +02:00
read_write.c
fs: allow deduplication of eof block into the end of the destination file
2020-02-11 04:35:23 -08:00
readdir.c
readdir: make sure to verify directory entry for legacy interfaces too
2021-04-21 12:56:16 +02:00
select.c
kernel, fs: Introduce and use set_restart_fn() and arch_set_restart_data()
2021-03-24 11:26:44 +01:00
seq_file.c
seq_file: fix problem when seeking mid-record
2019-08-13 16:06:52 -07:00
signalfd.c
fs/signalfd.c: fix inconsistent return codes for signalfd4
2020-08-26 10:40:58 +02:00
splice.c
splice: only read in as much information as there is pipe buffer space
2019-12-17 19:56:52 +01:00
stack.c
…
stat.c
…
statfs.c
vfs: Fix EOVERFLOW testing in put_compat_statfs64
2019-10-03 14:21:35 -07:00
super.c
vfs: remove lockdep bogosity in __sb_start_write
2020-11-24 13:29:01 +01:00
sync.c
…
timerfd.c
timerfd: Prepare for PREEMPT_RT
2019-08-01 20:51:23 +02:00
userfaultfd.c
userfaultfd: require CAP_SYS_PTRACE for UFFD_FEATURE_EVENT_FORK
2020-01-04 19:18:32 +01:00
utimes.c
utimes: Clamp the timestamps in notify_change()
2020-02-11 04:35:12 -08:00
xattr.c
xattr: break delegations in {set,remove}xattr
2020-08-11 15:33:39 +02:00