INFO: task kworker/0:6:5706 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:6     state:D stack:24128 pid:5706  tgid:5706  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events reg_todo
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5581 [inline]
 __schedule+0x1b47/0x5b40 kernel/sched/core.c:7384
 __schedule_loop kernel/sched/core.c:7461 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7476
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7533
 __mutex_lock_common kernel/locking/mutex.c:726 [inline]
 __mutex_lock+0x7c4/0x15a0 kernel/locking/mutex.c:821
 class_wiphy_constructor include/net/cfg80211.h:6945 [inline]
 reg_process_self_managed_hints+0x8d/0x160 net/wireless/reg.c:3234
 reg_todo+0x8df/0xa40 net/wireless/reg.c:3247
 process_one_work kernel/workqueue.c:3495 [inline]
 process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3659
 kthread+0x38b/0x480 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:123
 nmi_trigger_cpumask_backtrace+0x17d/0x390 lib/nmi_backtrace.c:66
 trigger_all_cpu_backtrace include/linux/nmi.h:164 [inline]
 __sys_info lib/sys_info.c:157 [inline]
 sys_info+0x135/0x170 lib/sys_info.c:165
 check_hung_uninterruptible_tasks kernel/hung_task.c:377 [inline]
 watchdog+0x1058/0x10d0 kernel/hung_task.c:598
 kthread+0x38b/0x480 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 887 Comm: kworker/0:2 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: wg-kex-wg2 wg_packet_handshake_receive_worker
RIP: 0010:debug_smp_processor_id+0x12/0x20 lib/smp_processor_id.c:58
Code: cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 c7 c7 20 43 8f 8c 48 c7 c6 60 43 8f 8c <eb> 1c 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000007c48 EFLAGS: 00000246
RAX: 1ffff11017087b3a RBX: ffff888067600280 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8c8f4360 RDI: ffffffff8c8f4320
RBP: dffffc0000000000 R08: ffff8880676003cf R09: 0000000000000000
R10: ffff8880676003c0 R11: ffffed100cec007a R12: ffff888067600288
R13: ffff8880b843d9d0 R14: ffff8880676003c0 R15: 000000000000000f
FS:  0000000000000000(0000) GS:ffff888124622000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff74a63118 CR3: 00000000703e4000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 process_backlog+0x55e/0x18b0 net/core/dev.c:6727
 __napi_poll+0xaa/0x330 net/core/dev.c:7798
 napi_poll net/core/dev.c:7861 [inline]
 net_rx_action+0x61d/0xf50 net/core/dev.c:8018
 handle_softirqs+0x223/0x840 kernel/softirq.c:645
 do_softirq+0x77/0xd0 kernel/softirq.c:546
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x100/0x140 kernel/softirq.c:473
 blake2s_compress+0xfa/0x1c00 lib/crypto/x86/blake2s.h:42
 blake2s_update+0x140/0x450 lib/crypto/blake2s.c:119
 hmac+0x1f4/0x3b0 drivers/net/wireguard/noise.c:324
 kdf drivers/net/wireguard/noise.c:367 [inline]
 message_ephemeral+0x255/0x310 drivers/net/wireguard/noise.c:493
 wg_noise_handshake_consume_initiation+0x217/0x9b0 drivers/net/wireguard/noise.c:605
 wg_receive_handshake_packet drivers/net/wireguard/receive.c:144 [inline]
 wg_packet_handshake_receive_worker+0x674/0x10b0 drivers/net/wireguard/receive.c:213
 process_one_work kernel/workqueue.c:3495 [inline]
 process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3659
 kthread+0x38b/0x480 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>