INFO: task syz-executor.0:15719 blocked for more than 143 seconds.
      Not tainted 5.14.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:28144 pid:15719 ppid:  8496 flags:0x20000004
Call Trace:
 context_switch kernel/sched/core.c:4681 [inline]
 __schedule+0x93a/0x26f0 kernel/sched/core.c:5938
 schedule+0xd3/0x270 kernel/sched/core.c:6017
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6076
 __mutex_lock_common kernel/locking/mutex.c:1036 [inline]
 __mutex_lock+0x7b6/0x10a0 kernel/locking/mutex.c:1104
 vhost_net_stop_vq drivers/vhost/net.c:1352 [inline]
 vhost_net_stop+0x142/0x270 drivers/vhost/net.c:1366
 vhost_net_release+0x9c/0x2d0 drivers/vhost/net.c:1398
 __fput+0x288/0x920 fs/file_table.c:280
 task_work_run+0xdd/0x1a0 kernel/task_work.c:164
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
 exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:209
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
 __do_fast_syscall_32+0x72/0xf0 arch/x86/entry/common.c:181
 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf7fa6549
RSP: 002b:00000000086cfb40 EFLAGS: 00000206 ORIG_RAX: 0000000000000006
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 000000000816c000 RDI: 0000000000045b0f
RBP: 000000000819b740 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

Showing all locks held in the system:
1 lock held by khungtaskd/1640:
 #0: ffffffff8b97c280 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446
1 lock held by in:imklog/8187:
 #0: ffff8880162ec5f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:974
1 lock held by syz-executor.0/15719:
 #0: ffff8880772f0218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop_vq drivers/vhost/net.c:1352 [inline]
 #0: ffff8880772f0218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop+0x142/0x270 drivers/vhost/net.c:1366
1 lock held by vhost-15720/15722:

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 1640 Comm: khungtaskd Not tainted 5.14.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105
 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
 watchdog+0xd0a/0xfc0 kernel/hung_task.c:295
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4868 Comm: systemd-journal Not tainted 5.14.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0033:0x7ff4baaaac92
Code: 00 49 8b 41 28 80 78 0c 00 0f 85 e5 03 00 00 41 0f b6 51 08 44 0f b6 34 24 89 d0 83 e2 fd d0 e8 41 09 c6 41 83 e6 01 45 01 f6 <41> 09 d6 45 88 71 08 49 8b 47 10 48 2b 58 18 48 03 58 10 48 8b 84
RSP: 002b:00007fffd145df90 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 00000000003619b0 RCX: 00000000003619b0
RDX: 0000000000000000 RSI: 0000000000000010 RDI: 000056221e8ed120
RBP: 000056221e8e9040 R08: 00000000003619c0 R09: 000056221e8ed120
R10: 00007fffd1591090 R11: 00007ff4b8352a88 R12: 0000000000000001
R13: 0000000000000003 R14: 0000000000000002 R15: 000056221e8ed3b0
FS:  00007ff4bae728c0 GS:  0000000000000000