INFO: task syz-executor.0:6331 blocked for more than 143 seconds.
      Not tainted 5.16.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:26912 pid: 6331 ppid:  3622 flags:0x20000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4972 [inline]
 __schedule+0xa9a/0x4900 kernel/sched/core.c:6253
 schedule+0xd2/0x260 kernel/sched/core.c:6326
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
 __mutex_lock_common kernel/locking/mutex.c:680 [inline]
 __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
 vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
 vhost_net_stop+0x142/0x270 drivers/vhost/net.c:1373
 vhost_net_release+0x9c/0x2d0 drivers/vhost/net.c:1405
 __fput+0x286/0x9f0 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:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
 __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: 0023:0xf6e8c549
RSP: 002b:00000000f751db20 EFLAGS: 00000286 ORIG_RAX: 0000000000000006
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 00000000f6fc3000 RDI: 0000000000000000
RBP: 00000000f6fee6c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/26:
 #0: ffffffff8bb83da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
2 locks held by getty/3280:
 #0: ffff88814a7d4098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252
 #1: ffffc90002b962e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113
1 lock held by syz-executor.0/6331:
 #0: ffff888076f50218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
 #0: ffff888076f50218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop+0x142/0x270 drivers/vhost/net.c:1373
1 lock held by vhost-6333/6334:

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

NMI backtrace for cpu 0
CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.16.0-rc7-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+0xcd/0x134 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
 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+0xc1d/0xf50 kernel/hung_task.c:295
 kthread+0x405/0x4f0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 6334 Comm: vhost-6333 Not tainted 5.16.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x6b/0x70 kernel/kcov.c:289
Code: 00 00 00 48 39 fe 72 22 44 89 c6 48 83 c2 01 48 89 4c 38 f0 48 c7 44 38 e0 05 00 00 00 48 89 74 38 e8 4e 89 54 c8 20 48 89 10 <c3> 0f 1f 40 00 49 89 f8 bf 03 00 00 00 4c 8b 14 24 48 89 f1 65 48
RSP: 0018:ffffc90010c0fb20 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8880559f0300 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffff888075020000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffc90010c0fb1f
R10: ffffffff86d1b576 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005649b157f680 CR3: 000000007a73f000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 iotlb_access_ok+0x256/0x3e0 drivers/vhost/vhost.c:1340
 vq_meta_prefetch+0xbc/0x280 drivers/vhost/vhost.c:1366
 handle_rx+0x145/0x1b40 drivers/vhost/net.c:1140
 vhost_worker+0x23d/0x3d0 drivers/vhost/vhost.c:372
 kthread+0x405/0x4f0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	00 00                	add    %al,(%rax)
   2:	48 39 fe             	cmp    %rdi,%rsi
   5:	72 22                	jb     0x29
   7:	44 89 c6             	mov    %r8d,%esi
   a:	48 83 c2 01          	add    $0x1,%rdx
   e:	48 89 4c 38 f0       	mov    %rcx,-0x10(%rax,%rdi,1)
  13:	48 c7 44 38 e0 05 00 	movq   $0x5,-0x20(%rax,%rdi,1)
  1a:	00 00
  1c:	48 89 74 38 e8       	mov    %rsi,-0x18(%rax,%rdi,1)
  21:	4e 89 54 c8 20       	mov    %r10,0x20(%rax,%r9,8)
  26:	48 89 10             	mov    %rdx,(%rax)
* 29:	c3                   	retq <-- trapping instruction
  2a:	0f 1f 40 00          	nopl   0x0(%rax)
  2e:	49 89 f8             	mov    %rdi,%r8
  31:	bf 03 00 00 00       	mov    $0x3,%edi
  36:	4c 8b 14 24          	mov    (%rsp),%r10
  3a:	48 89 f1             	mov    %rsi,%rcx
  3d:	65                   	gs
  3e:	48                   	rex.W