INFO: task syz-executor.3:9128 blocked for more than 143 seconds.
      Not tainted 5.16.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D stack:26864 pid: 9128 ppid:  6539 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4972 [inline]
 __schedule+0xb72/0x1460 kernel/sched/core.c:6253
 schedule+0x12b/0x1f0 kernel/sched/core.c:6326
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
 __mutex_lock_common+0xd1f/0x2590 kernel/locking/mutex.c:680
 __mutex_lock kernel/locking/mutex.c:740 [inline]
 mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:792
 vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
 vhost_net_stop+0x10c/0x1e0 drivers/vhost/net.c:1373
 vhost_net_release+0x100/0x4d0 drivers/vhost/net.c:1405
 __fput+0x3fc/0x870 fs/file_table.c:280
 task_work_run+0x146/0x1c0 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+0x209/0x220 kernel/entry/common.c:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:300
 do_syscall_64+0x53/0xd0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f1d6151272b
RSP: 002b:00007fffa3f5bfa0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 00007f1d6151272b
RDX: 0000000000000000 RSI: ffffffff81acd212 RDI: 0000000000000003
RBP: 0000000000000004 R08: 0000000000000000 R09: 00007f1d616782e0
R10: 0000000000000eef R11: 0000000000000293 R12: 00007f1d61674860
R13: 00007f1d61674860 R14: 0000000000000000 R15: 00000000000d2688
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: ffffffff8cb1db40 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by kworker/u4:4/1046:
 #0: ffff8880b9a395d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xc6/0x110 kernel/sched/core.c:486
 #1: ffffc90004affd20 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2273
1 lock held by in:imklog/6214:
 #0: ffff88801bb440f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:994
1 lock held by syz-executor.3/9128:
 #0: ffff88816acd0218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
 #0: ffff88816acd0218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop+0x10c/0x1e0 drivers/vhost/net.c:1373
1 lock held by vhost-9132/9138:

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

NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x16a/0x280 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+0xc82/0xcd0 kernel/hung_task.c:295
 kthread+0x468/0x490 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2964 Comm: systemd-journal Not tainted 5.16.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0033:0x55c21b1e047f
Code: 00 00 48 89 df e8 d1 1d 00 00 48 8b 83 a8 01 00 00 48 39 83 78 01 00 00 48 0f 43 83 78 01 00 00 48 89 83 78 01 00 00 45 84 ed <0f> 85 cd fd ff ff be 01 00 00 00 48 89 df e8 ae 15 00 00 e9 bb fd
RSP: 002b:00007ffe04c31110 EFLAGS: 00000246
RAX: 00000000fffffffe RBX: 00007ffe04c34070 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffe04c34110
RBP: 00007ffe04c31190 R08: 000055c21b1e03e5 R09: 0000000000000018
R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 000055c21cf898a0 R15: 00007ffe04c31680
FS:  00007f74a3a4a8c0 GS:  0000000000000000