INFO: task syz-executor.2:10342 blocked for more than 143 seconds.
      Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2  state:D stack:25640 pid:10342 ppid:  8098 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4972 [inline]
 __schedule+0xa9a/0x4940 kernel/sched/core.c:6253
 schedule+0xd2/0x260 kernel/sched/core.c:6326
 blk_mq_freeze_queue_wait+0x112/0x160 block/blk-mq.c:178
 loop_set_status+0x17d/0x930 drivers/block/loop.c:1264
 loop_set_status_old+0x148/0x1b0 drivers/block/loop.c:1396
 lo_ioctl+0x3e9/0x17c0 drivers/block/loop.c:1566
 blkdev_ioctl+0x37a/0x800 block/ioctl.c:609
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl fs/ioctl.c:860 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
 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+0x44/0xae
RIP: 0033:0x7fa125f73ae9
RSP: 002b:00007fa1234e9188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fa126086f60 RCX: 00007fa125f73ae9
RDX: 0000000020000780 RSI: 0000000000004c02 RDI: 0000000000000004
RBP: 00007fa125fcdf6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa1265bab2f R14: 00007fa1234e9300 R15: 0000000000022000
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/26:
 #0: ffffffff8bb83a60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by syz-executor.2/10342:
 #0: ffff88801ad22360 (&lo->lo_mutex){+.+.}-{3:3}, at: loop_set_status+0x2a/0x930 drivers/block/loop.c:1248
2 locks held by systemd-udevd/10383:
 #0: ffff88801ad26918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
 #1: ffff88801ad22360 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_open+0x75/0x120 drivers/block/loop.c:1733

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

NMI backtrace for cpu 0
CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.16.0-rc1-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:105
 nmi_trigger_cpumask_backtrace+0x1ae/0x220 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: 1863 Comm: kworker/1:2 Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_power_efficient wg_ratelimiter_gc_entries
RIP: 0010:check_preemption_disabled+0x28/0x170 lib/smp_processor_id.c:16
Code: cc cc 41 56 41 55 49 89 f5 41 54 55 48 89 fd 53 0f 1f 44 00 00 65 44 8b 25 6d dc af 76 65 8b 1d de 36 b0 76 81 e3 ff ff ff 7f <31> ff 89 de 0f 1f 44 00 00 85 db 74 11 0f 1f 44 00 00 44 89 e0 5b
RSP: 0000:ffffc900064f7c38 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff89ac0de0 RDI: ffffffff8a0516a0
RBP: ffffffff8a0516a0 R08: 0000000000000000 R09: ffffffff8c8415a3
R10: fffffbfff19082b4 R11: 0000000000000000 R12: 0000000000000001
R13: ffffffff89ac0de0 R14: 00000000ffffffff R15: ffff88801e7ec488
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5a43204028 CR3: 000000001ae1d000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 lockdep_recursion_finish kernel/locking/lockdep.c:438 [inline]
 lock_is_held_type+0xd7/0x140 kernel/locking/lockdep.c:5681
 lock_is_held include/linux/lockdep.h:283 [inline]
 __might_resched+0x21/0x2c0 kernel/sched/core.c:9504
 wg_ratelimiter_gc_entries+0x2f1/0x430 drivers/net/wireguard/ratelimiter.c:78
 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
 kthread+0x405/0x4f0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
----------------
Code disassembly (best guess):
   0:	cc                   	int3
   1:	cc                   	int3
   2:	41 56                	push   %r14
   4:	41 55                	push   %r13
   6:	49 89 f5             	mov    %rsi,%r13
   9:	41 54                	push   %r12
   b:	55                   	push   %rbp
   c:	48 89 fd             	mov    %rdi,%rbp
   f:	53                   	push   %rbx
  10:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  15:	65 44 8b 25 6d dc af 	mov    %gs:0x76afdc6d(%rip),%r12d        # 0x76afdc8a
  1c:	76
  1d:	65 8b 1d de 36 b0 76 	mov    %gs:0x76b036de(%rip),%ebx        # 0x76b03702
  24:	81 e3 ff ff ff 7f    	and    $0x7fffffff,%ebx
* 2a:	31 ff                	xor    %edi,%edi <-- trapping instruction
  2c:	89 de                	mov    %ebx,%esi
  2e:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  33:	85 db                	test   %ebx,%ebx
  35:	74 11                	je     0x48
  37:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  3c:	44 89 e0             	mov    %r12d,%eax
  3f:	5b                   	pop    %rbx