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Hao Xu 6195ba0982 io_uring: fix flush cqring overflow list while TASK_INTERRUPTIBLE 
Abaci reported the follow warning:

[   27.073425] do not call blocking ops when !TASK_RUNNING; state=1 set at [] prepare_to_wait_exclusive+0x3a/0xc0
[   27.075805] WARNING: CPU: 0 PID: 951 at kernel/sched/core.c:7853 __might_sleep+0x80/0xa0
[   27.077604] Modules linked in:
[   27.078379] CPU: 0 PID: 951 Comm: a.out Not tainted 5.11.0-rc3+ #1
[   27.079637] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011
[   27.080852] RIP: 0010:__might_sleep+0x80/0xa0
[   27.081835] Code: 65 48 8b 04 25 80 71 01 00 48 8b 90 c0 15 00 00 48 8b 70 18 48 c7 c7 08 39 95 82 c6 05 f9 5f de 08 01 48 89 d1 e8 00 c6 fa ff  0b eb bf 41 0f b6 f5 48 c7 c7 40 23 c9 82 e8 f3 48 ec 00 eb a7
[   27.084521] RSP: 0018:ffffc90000fe3ce8 EFLAGS: 00010286
[   27.085350] RAX: 0000000000000000 RBX: ffffffff82956083 RCX: 0000000000000000
[   27.086348] RDX: ffff8881057a0000 RSI: ffffffff8118cc9e RDI: ffff88813bc28570
[   27.087598] RBP: 00000000000003a7 R08: 0000000000000001 R09: 0000000000000001
[   27.088819] R10: ffffc90000fe3e00 R11: 00000000fffef9f0 R12: 0000000000000000
[   27.089819] R13: 0000000000000000 R14: ffff88810576eb80 R15: ffff88810576e800
[   27.091058] FS:  00007f7b144cf740(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000
[   27.092775] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   27.093796] CR2: 00000000022da7b8 CR3: 000000010b928002 CR4: 00000000003706f0
[   27.094778] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   27.095780] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   27.097011] Call Trace:
[   27.097685]  __mutex_lock+0x5d/0xa30
[   27.098565]  ? prepare_to_wait_exclusive+0x71/0xc0
[   27.099412]  ? io_cqring_overflow_flush.part.101+0x6d/0x70
[   27.100441]  ? lockdep_hardirqs_on_prepare+0xe9/0x1c0
[   27.101537]  ? _raw_spin_unlock_irqrestore+0x2d/0x40
[   27.102656]  ? trace_hardirqs_on+0x46/0x110
[   27.103459]  ? io_cqring_overflow_flush.part.101+0x6d/0x70
[   27.104317]  io_cqring_overflow_flush.part.101+0x6d/0x70
[   27.105113]  io_cqring_wait+0x36e/0x4d0
[   27.105770]  ? find_held_lock+0x28/0xb0
[   27.106370]  ? io_uring_remove_task_files+0xa0/0xa0
[   27.107076]  __x64_sys_io_uring_enter+0x4fb/0x640
[   27.107801]  ? rcu_read_lock_sched_held+0x59/0xa0
[   27.108562]  ? lockdep_hardirqs_on_prepare+0xe9/0x1c0
[   27.109684]  ? syscall_enter_from_user_mode+0x26/0x70
[   27.110731]  do_syscall_64+0x2d/0x40
[   27.111296]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   27.112056] RIP: 0033:0x7f7b13dc8239
[   27.112663] Code: 01 00 48 81 c4 80 00 00 00 e9 f1 fe ff ff 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05  3d 01 f0 ff ff 73 01 c3 48 8b 0d 27 ec 2c 00 f7 d8 64 89 01 48
[   27.115113] RSP: 002b:00007ffd6d7f5c88 EFLAGS: 00000286 ORIG_RAX: 00000000000001aa
[   27.116562] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7b13dc8239
[   27.117961] RDX: 000000000000478e RSI: 0000000000000000 RDI: 0000000000000003
[   27.118925] RBP: 00007ffd6d7f5cb0 R08: 0000000020000040 R09: 0000000000000008
[   27.119773] R10: 0000000000000001 R11: 0000000000000286 R12: 0000000000400480
[   27.120614] R13: 00007ffd6d7f5d90 R14: 0000000000000000 R15: 0000000000000000
[   27.121490] irq event stamp: 5635
[   27.121946] hardirqs last  enabled at (5643): [] console_unlock+0x5c4/0x740
[   27.123476] hardirqs last disabled at (5652): [] console_unlock+0x4e7/0x740
[   27.125192] softirqs last  enabled at (5272): [] __do_softirq+0x3c5/0x5aa
[   27.126430] softirqs last disabled at (5267): [] asm_call_irq_on_stack+0xf/0x20
[   27.127634] ---[ end trace 289d7e28fa60f928 ]---

This is caused by calling io_cqring_overflow_flush() which may sleep
after calling prepare_to_wait_exclusive() which set task state to
TASK_INTERRUPTIBLE

Reported-by: Abaci <abaci@linux.alibaba.com>
Fixes: 6c503150ae33 ("io_uring: patch up IOPOLL overflow_flush sync")
Reviewed-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Hao Xu <haoxu@linux.alibaba.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-01-27 09:18:28 -07:00
..
9p
9p for 5.11-rc1
2020-12-21 10:28:02 -08:00
adfs
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-24 12:26:05 -07:00
affs
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-24 12:26:05 -07:00
afs
afs: Fix directory entry size calculation
2021-01-04 12:25:19 +00:00
autofs
file: Replace ksys_close with close_fd
2020-12-10 12:42:59 -06:00
befs
[PATCH] reduce boilerplate in fsid handling
2020-09-18 16:45:50 -04:00
bfs
bfs: don't use WARNING: string when it's just info.
2020-12-15 22:46:18 -08:00
btrfs
for-5.11-rc4-tag
2021-01-20 14:15:33 -08:00
cachefiles
cachefiles: Drop superfluous readpages aops NULL check
2021-01-20 11:33:51 -08:00
ceph
libceph, ceph: disambiguate ceph_connection_operations handlers
2021-01-04 17:31:32 +01:00
cifs
cifs: do not fail __smb_send_rqst if non-fatal signals are pending
2021-01-23 01:28:20 -06:00
coda
docs: filesystems: convert coda.txt to ReST
2020-05-05 09:22:21 -06:00
configfs
configfs: fix kernel-doc markup issue
2020-11-14 10:22:45 +01:00
cramfs
[PATCH] reduce boilerplate in fsid handling
2020-09-18 16:45:50 -04:00
crypto
f2fs-for-5.11-rc1
2020-12-17 11:18:00 -08:00
debugfs
debugfs: remove return value of debugfs_create_devm_seqfile()
2020-10-30 08:37:39 +01:00
devpts
…
dlm
fs: dlm: check on existing node address
2020-11-10 12:14:20 -06:00
ecryptfs
mm, treewide: rename kzfree() to kfree_sensitive()
2020-08-07 11:33:22 -07:00
efivarfs
efivarfs: revert "fix memory leak in efivarfs_create()"
2020-11-25 16:55:02 +01:00
efs
[PATCH] reduce boilerplate in fsid handling
2020-09-18 16:45:50 -04:00
erofs
erofs: avoid using generic_block_bmap
2020-12-10 11:07:40 +08:00
exfat
exfat: Avoid allocating upcase table using kcalloc()
2020-12-22 12:31:17 +09:00
exportfs
exportfs: Add a function to return the raw output from fh_to_dentry()
2020-12-09 09:39:38 -05:00
ext2
ext2: Fix fall-through warnings for Clang
2020-11-23 10:36:53 +01:00
ext4
A number of bug fixes for ext4:
2021-01-15 14:54:24 -08:00
f2fs
f2fs-for-5.11-rc1
2020-12-17 11:18:00 -08:00
fat
[PATCH] reduce boilerplate in fsid handling
2020-09-18 16:45:50 -04:00
freevxfs
…
fscache
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
2020-06-03 16:27:18 -07:00
fuse
fuse: fix bad inode
2020-12-10 15:33:14 +01:00
gfs2
gfs2: in signal_our_withdraw wait for unfreeze of _this_ fs only
2020-12-03 17:04:41 +01:00
hfs
fs: Replace zero-length array with flexible-array member
2020-10-29 17:22:59 -05:00
hfsplus
fs: Replace zero-length array with flexible-array member
2020-10-29 17:22:59 -05:00
hostfs
fix hostfs_open() use of ->f_path.dentry
2020-12-21 21:42:29 -05:00
hpfs
[PATCH] reduce boilerplate in fsid handling
2020-09-18 16:45:50 -04:00
hugetlbfs
hugetlbfs: prevent filesystem stacking of hugetlbfs
2020-08-12 10:57:56 -07:00
iomap
mm: memcontrol: Use helpers to read page's memcg data
2020-12-02 18:28:05 -08:00
isofs
fs: Replace zero-length array with flexible-array member
2020-10-29 17:22:59 -05:00
jbd2
jbd2: add a helper to find out number of fast commit blocks
2020-12-17 13:30:45 -05:00
jffs2
jffs2: Fix NULL pointer dereference in rp_size fs option parsing
2020-12-13 21:57:21 +01:00
jfs
jfs: Fix array index bounds check in dbAdjTree
2020-11-13 16:03:07 -06:00
kernfs
kernfs: wire up ->splice_read and ->splice_write
2021-01-21 18:30:28 +01:00
lockd
fs/lockd: convert comma to semicolon
2020-12-16 07:57:37 -05:00
minix
[PATCH] reduce boilerplate in fsid handling
2020-09-18 16:45:50 -04:00
nfs
NFS: nfs_igrab_and_active must first reference the superblock
2021-01-10 16:29:28 -05:00
nfs_common
nfs_common: need lock during iterate through the list
2020-12-09 09:38:34 -05:00
nfsd
nfsd4: readdirplus shouldn't return parent of export
2021-01-12 08:54:14 -05:00
nilfs2
fs/nilfs2: remove some unused macros to tame gcc
2020-12-15 22:46:17 -08:00
nls
treewide: replace '---help---' in Kconfig files with 'help'
2020-06-14 01:57:21 +09:00
notify
fanotify: Fix sys_fanotify_mark() on native x86-32
2020-12-28 11:58:59 +01:00
ntfs
fs/ntfs: remove unused variable attr_len
2020-12-15 12:13:37 -08:00
ocfs2
ocfs2: ratelimit the 'max lookup times reached' notice
2020-12-15 12:13:37 -08:00
omfs
fs: omfs: use kmemdup() rather than kmalloc+memcpy
2020-09-22 23:39:45 -04:00
openpromfs
…
orangefs
orangefs: add splice file operations
2020-12-16 16:14:08 -05:00
overlayfs
ovl: unprivieged mounts
2020-12-14 15:26:14 +01:00
proc
proc_sysctl: fix oops caused by incorrect command parameters
2021-01-24 10:34:53 -08:00
pstore
Tracing updates for 5.11
2020-12-17 13:22:17 -08:00
qnx4
[PATCH] reduce boilerplate in fsid handling
2020-09-18 16:45:50 -04:00
qnx6
[PATCH] reduce boilerplate in fsid handling
2020-09-18 16:45:50 -04:00
quota
\n
2020-12-17 11:00:37 -08:00
ramfs
ramfs: fix nommu mmap with gaps in the page cache
2020-10-16 11:11:22 -07:00
reiserfs
reiserfs: add check for an invalid ih_entry_count
2020-11-26 16:57:28 +01:00
romfs
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-24 12:26:05 -07:00
squashfs
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-24 12:26:05 -07:00
sysfs
sysfs: Add sysfs_emit and sysfs_emit_at to format sysfs output
2020-10-02 12:02:30 +02:00
sysv
[PATCH] reduce boilerplate in fsid handling
2020-09-18 16:45:50 -04:00
tracefs
…
ubifs
This pull request contains changes for JFFS2, UBI and UBIFS:
2020-12-17 17:46:34 -08:00
udf
udf: fix the problem that the disc content is not displayed
2021-01-18 12:06:33 +01:00
ufs
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-24 12:26:05 -07:00
unicode
unicode: Add utf8_casefold_hash
2020-09-10 14:03:31 -07:00
vboxsf
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2020-10-15 15:11:56 -07:00
verity
Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
2020-12-14 12:18:19 -08:00
xfs
New code for 5.11:
2020-12-18 12:50:18 -08:00
zonefs
zonefs: select CONFIG_CRC32
2021-01-04 09:06:42 +09:00
aio.c
Merge branch 'akpm' (patches from Andrew)
2020-12-15 12:53:37 -08:00
anon_inodes.c
…
attr.c
…
bad_inode.c
fs: move the fiemap definitions out of fs.h
2020-06-03 23:16:55 -04:00
binfmt_aout.c
exec: Rename flush_old_exec begin_new_exec
2020-05-07 16:55:47 -05:00
binfmt_elf_fdpic.c
binfmt_elf, binfmt_elf_fdpic: use a VMA list snapshot
2020-10-16 11:11:21 -07:00
binfmt_elf.c
Merge branch 'exec-for-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2020-12-15 19:29:43 -08:00
binfmt_em86.c
Merge branch 'akpm' (patches from Andrew)
2020-06-04 19:18:29 -07:00
binfmt_flat.c
binfmt_flat: revert "binfmt_flat: don't offset the data start"
2020-08-24 08:49:13 +10:00
binfmt_misc.c
Merge branch 'akpm' (patches from Andrew)
2020-06-04 19:18:29 -07:00
binfmt_script.c
Merge branch 'akpm' (patches from Andrew)
2020-06-04 19:18:29 -07:00
block_dev.c
block: pre-initialize struct block_device in bdev_alloc_inode
2021-01-07 20:57:53 -07:00
buffer.c
for-5.11/block-2020-12-14
2020-12-16 12:57:51 -08:00
char_dev.c
vfs: allow unprivileged whiteout creation
2020-05-14 16:44:23 +02:00
compat_binfmt_elf.c
elf: Expose ELF header on arch_setup_additional_pages()
2020-10-26 13:46:47 +01:00
coredump.c
Merge branch 'exec-for-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2020-12-15 19:29:43 -08:00
d_path.c
fs: fix NULL dereference due to data race in prepend_path()
2020-10-14 14:54:45 -07:00
dax.c
mm: simplify follow_pte{,pmd}
2020-12-15 22:46:19 -08:00
dcache.c
fs: Kill DCACHE_DONTCACHE dentry even if DCACHE_REFERENCED is set
2020-12-10 17:33:17 -05:00
dcookies.c
…
direct-io.c
\n
2020-10-15 15:03:10 -07:00
drop_caches.c
sysctl: pass kernel pointers to ->proc_handler
2020-04-27 02:07:40 -04:00
eventfd.c
eventfd: Export eventfd_ctx_do_read()
2020-11-15 09:49:10 -05:00
eventpoll.c
epoll: add syscall epoll_pwait2
2020-12-19 11:18:38 -08:00
exec.c
Merge branch 'parisc-5.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
2020-12-16 12:10:40 -08:00
fcntl.c
fcntl: Fix potential deadlock in send_sig{io, urg}()
2020-11-05 07:44:15 -05:00
fhandle.c
…
file_table.c
epoll: take epitem list out of struct file
2020-10-25 20:02:08 -04:00
file.c
kernel/io_uring: cancel io_uring before task works
2020-12-30 19:36:54 -07:00
filesystems.c
fs/filesystems.c: downgrade user-reachable WARN_ONCE() to pr_warn_once()
2020-04-10 15:36:22 -07:00
fs_context.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
fs_parser.c
fs_parse: mark fs_param_bad_value() as static
2020-10-13 18:38:27 -07:00
fs_pin.c
…
fs_struct.c
vfs: Use sequence counter with associated spinlock
2020-07-29 16:14:27 +02:00
fs_types.c
…
fs-writeback.c
fs: fix lazytime expiration handling in __writeback_single_inode()
2021-01-13 17:26:21 +01:00
fsopen.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
init.c
init: add an init_dup helper
2020-08-04 21:02:38 -04:00
inode.c
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-12-25 10:54:29 -08:00
internal.h
for-5.11/block-2020-12-14
2020-12-16 12:57:51 -08:00
io_uring.c
io_uring: fix flush cqring overflow list while TASK_INTERRUPTIBLE
2021-01-27 09:18:28 -07:00
io-wq.c
io-wq: kill now unused io_wq_cancel_all()
2020-12-20 10:47:42 -07:00
io-wq.h
io-wq: kill now unused io_wq_cancel_all()
2020-12-20 10:47:42 -07:00
ioctl.c
fs: remove ksys_ioctl
2020-07-31 08:16:01 +02:00
Kconfig
tmpfs: support 64-bit inums per-sb
2020-08-07 11:33:24 -07:00
Kconfig.binfmt
treewide: replace '---help---' in Kconfig files with 'help'
2020-06-14 01:57:21 +09:00
kernel_read_file.c
fs/kernel_file_read: Add "offset" arg for partial reads
2020-10-05 13:37:04 +02:00
libfs.c
f2fs-for-5.11-rc1
2020-12-17 11:18:00 -08:00
locks.c
Merge branch 'exec-for-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2020-12-15 19:29:43 -08:00
Makefile
Refactored code for 5.10:
2020-10-23 11:33:41 -07:00
mbcache.c
…
mount.h
mnt: Use generic ns_common::count
2020-08-19 14:14:19 +02:00
mpage.c
fs: convert mpage_readpages to mpage_readahead
2020-06-02 10:59:07 -07:00
namei.c
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-12-25 10:54:29 -08:00
namespace.c
umount(2): move the flag validity checks first
2021-01-04 15:31:58 -05:00
no-block.c
…
nsfs.c
nsproxy: attach to namespaces via pidfds
2020-05-13 11:41:22 +02:00
open.c
Merge branch 'exec-for-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2020-12-15 19:29:43 -08:00
pipe.c
block: remove i_bdev
2020-12-01 14:53:39 -07:00
pnode.c
propagate_one(): mnt_set_mountpoint() needs mount_lock
2020-04-27 10:37:14 -04:00
pnode.h
fs/namespace.c: WARN if mnt_count has become negative
2020-12-10 17:33:17 -05:00
posix_acl.c
vfs: clean up posix_acl_permission() logic aroudn MAY_NOT_BLOCK
2020-06-08 11:04:19 -07:00
proc_namespace.c
proc mountinfo: make splice available again
2020-12-27 12:00:36 -08:00
read_write.c
Refactored code for 5.10:
2020-10-23 11:33:41 -07:00
readdir.c
fs: remove ksys_getdents64
2020-07-31 08:16:00 +02:00
remap_range.c
vfs: verify source area in vfs_dedupe_file_range_one()
2020-12-14 15:26:13 +01:00
select.c
poll: fix performance regression due to out-of-line __put_user()
2021-01-08 11:06:29 -08:00
seq_file.c
fix return values of seq_read_iter()
2020-11-15 22:12:53 -05:00
signalfd.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
splice.c
io_uring-5.10-2020-10-24
2020-10-24 12:40:18 -07:00
stack.c
…
stat.c
fs: remove KSTAT_QUERY_FLAGS
2020-09-26 22:55:05 -04:00
statfs.c
block: remove i_bdev
2020-12-01 14:53:39 -07:00
super.c
block: remove i_bdev
2020-12-01 14:53:39 -07:00
sync.c
overlayfs update for 5.8
2020-06-09 15:40:50 -07:00
timerfd.c
…
userfaultfd.c
userfaultfd: add user-mode only option to unprivileged_userfaultfd sysctl knob
2020-12-15 12:13:46 -08:00
utimes.c
fs: expose utimes_common
2020-07-31 08:16:01 +02:00
xattr.c
vfs: move cap_convert_nscap() call into vfs_setxattr()
2020-12-14 15:26:13 +01:00