INFO: task syz-executor.3:11112 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.3  state:D stack:27656 pid:11112 ppid:  8270 flags:0x00024004
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
 io_uring_cancel_generic+0x53d/0x690 fs/io_uring.c:9846
 io_uring_files_cancel include/linux/io_uring.h:16 [inline]
 do_exit+0x60c/0x2b40 kernel/exit.c:787
 do_group_exit+0x125/0x310 kernel/exit.c:929
 get_signal+0x47d/0x2220 kernel/signal.c:2852
 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0x17d/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_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fb199040ae9
RSP: 002b:00007fb1965b6218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fb199153f68 RCX: 00007fb199040ae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fb199153f68
RBP: 00007fb199153f60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb199153f6c
R13: 00007fb199687b2f R14: 00007fb1965b6300 R15: 0000000000022000
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: ffffffff8bb83b60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by systemd-journal/2948:
1 lock held by in:imklog/6222:
 #0: ffff888079128870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990

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

NMI backtrace for cpu 1
CPU: 1 PID: 27 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: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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:lockdep_softirqs_on+0xdd/0x340 kernel/locking/lockdep.c:4417
Code: df 48 89 c1 83 e0 07 48 c1 e9 03 83 c0 03 0f b6 14 11 38 d0 7c 08 84 d2 0f 85 0d 02 00 00 8b 05 59 1f ef 0e 85 c0 75 0b 9c 58 <f6> c4 02 0f 85 93 01 00 00 65 48 8b 2c 25 40 70 02 00 48 8d bd 40
RSP: 0018:ffffc90000cd7be8 EFLAGS: 00000046
RAX: 0000000000000046 RBX: ffff888010e7d700 RCX: 1ffffffff2097f38
RDX: 0000000000000004 RSI: 0000000000000000 RDI: ffff888010e7e15c
RBP: ffff888010e7d700 R08: 0000000000000000 R09: ffff88803056d803
R10: ffffffff817dd82d R11: 0000000000000000 R12: ffffffff88dff3f5
R13: ffff8880302f4c80 R14: dffffc0000000000 R15: ffffffff88dff4f0
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd59550f000 CR3: 000000000b88e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __local_bh_enable_ip+0xcd/0x120 kernel/softirq.c:371
 spin_unlock_bh include/linux/spinlock.h:394 [inline]
 batadv_nc_purge_paths+0x2a5/0x3a0 net/batman-adv/network-coding.c:475
 batadv_nc_worker+0x8f9/0xfa0 net/batman-adv/network-coding.c:724
 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:	df 48 89             	fisttps -0x77(%rax)
   3:	c1 83 e0 07 48 c1 e9 	roll   $0xe9,-0x3eb7f820(%rbx)
   a:	03 83 c0 03 0f b6    	add    -0x49f0fc40(%rbx),%eax
  10:	14 11                	adc    $0x11,%al
  12:	38 d0                	cmp    %dl,%al
  14:	7c 08                	jl     0x1e
  16:	84 d2                	test   %dl,%dl
  18:	0f 85 0d 02 00 00    	jne    0x22b
  1e:	8b 05 59 1f ef 0e    	mov    0xeef1f59(%rip),%eax        # 0xeef1f7d
  24:	85 c0                	test   %eax,%eax
  26:	75 0b                	jne    0x33
  28:	9c                   	pushfq
  29:	58                   	pop    %rax
* 2a:	f6 c4 02             	test   $0x2,%ah <-- trapping instruction
  2d:	0f 85 93 01 00 00    	jne    0x1c6
  33:	65 48 8b 2c 25 40 70 	mov    %gs:0x27040,%rbp
  3a:	02 00
  3c:	48                   	rex.W
  3d:	8d                   	.byte 0x8d
  3e:	bd                   	.byte 0xbd
  3f:	40                   	rex