INFO: task syz-executor.1:1551 blocked for more than 143 seconds.
      Not tainted 6.1.0-rc1-next-20221021-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D stack:29176 pid:1551  ppid:3639   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5191 [inline]
 __schedule+0xae9/0x53f0 kernel/sched/core.c:6503
 schedule+0xda/0x1b0 kernel/sched/core.c:6579
 blk_mq_freeze_queue_wait+0x112/0x160 block/blk-mq.c:180
 nbd_add_socket+0x166/0x810 drivers/block/nbd.c:1121
 __nbd_ioctl drivers/block/nbd.c:1464 [inline]
 nbd_ioctl+0x4ab/0xbd0 drivers/block/nbd.c:1521
 blkdev_ioctl+0x36e/0x800 block/ioctl.c:614
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f3e4828b5a9
RSP: 002b:00007f3e49067168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f3e483ac050 RCX: 00007f3e4828b5a9
RDX: 0000000000000004 RSI: 000000000000ab00 RDI: 0000000000000006
RBP: 00007f3e482e67b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffced8c2c2f R14: 00007f3e49067300 R15: 0000000000022000
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.1.0-rc1-next-20221021-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
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+0x24/0x18a lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x32f/0x3c0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
 watchdog+0xc71/0xfc0 kernel/hung_task.c:377
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 26636 Comm: kworker/0:4 Not tainted 6.1.0-rc1-next-20221021-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
Workqueue:  0x0 (events)
RIP: 0010:trace_lock_acquire include/trace/events/lock.h:24 [inline]
RIP: 0010:lock_acquire+0xf9/0x630 kernel/locking/lockdep.c:5639
Code: 08 00 00 00 48 89 d0 48 89 54 24 08 48 c1 e8 06 48 8d 3c c5 10 34 c2 8d e8 74 6c 69 00 48 8b 54 24 08 48 0f a3 15 27 7b 62 0c <0f> 82 cb 03 00 00 48 c7 c0 0c 69 c2 8d 48 ba 00 00 00 00 00 fc ff
RSP: 0018:ffffc9000a44fb20 EFLAGS: 00000047
RAX: 0000000000000001 RBX: 1ffff92001489f67 RCX: ffffffff815fb8dc
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8dc23410
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8dc23417
R10: fffffbfff1b84682 R11: 000000000008c001 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff9125b200 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9335cd7a98 CR3: 00000000a2698000 CR4: 00000000003506f0
DR0: 00000000ffff070c DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162
 debug_object_deactivate lib/debugobjects.c:739 [inline]
 debug_object_deactivate+0x101/0x300 lib/debugobjects.c:727
 debug_work_deactivate kernel/workqueue.c:515 [inline]
 process_one_work+0x391/0x1710 kernel/workqueue.c:2219
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>