INFO: task kworker/1:6:5742 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:6     state:D stack:20992 pid:5742  tgid:5742  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events_power_efficient reg_check_chans_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5504 [inline]
 __schedule+0x16dc/0x5500 kernel/sched/core.c:7228
 __schedule_loop kernel/sched/core.c:7307 [inline]
 rt_mutex_schedule+0x76/0xf0 kernel/sched/core.c:7603
 rt_mutex_slowlock_block+0x55c/0x680 kernel/locking/rtmutex.c:1670
 __rt_mutex_slowlock kernel/locking/rtmutex.c:1747 [inline]
 __rt_mutex_slowlock_locked kernel/locking/rtmutex.c:1787 [inline]
 rt_mutex_slowlock+0x2d4/0x780 kernel/locking/rtmutex.c:1827
 __rt_mutex_lock kernel/locking/rtmutex.c:1842 [inline]
 __mutex_lock_common kernel/locking/rtmutex_api.c:560 [inline]
 mutex_lock_nested+0x168/0x1d0 kernel/locking/rtmutex_api.c:578
 class_wiphy_constructor include/net/cfg80211.h:6646 [inline]
 reg_leave_invalid_chans net/wireless/reg.c:2454 [inline]
 reg_check_chans_work+0x1a1/0x10e0 net/wireless/reg.c:2469
 process_one_work kernel/workqueue.c:3314 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3397
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3478
 kthread+0x388/0x470 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: 38 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Har[  965.855287][   T38] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [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:353 [inline]
 watchdog+0xfd7/0x1030 kernel/hung_task.c:561
 kthread+0x388/0x470 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: 16 Comm: ktimers/0 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:__rb_erase_augmented include/linux/rbtree_augmented.h:228 [inline]
RIP: 0010:rb_erase_augmented include/linux/rbtree_augmented.h:329 [inline]
RIP: 0010:rb_erase_augmented_cached include/linux/rbtree_augmented.h:340 [inline]
RIP: 0010:__dequeue_entity+0xc6/0x1180 kernel/sched/fair.c:1051
Code: 48 b8 00 00 00 00 00 fc ff df 48 89 4c 24 60 80 3c 01 00 74 0b 48 89 fb e8 97 49 93 00 48 89 df 49 8d 44 24 48 48 89 44 24 28 <48> 8b 1f 48 85 db 4c 89 6c 24 68 4c 89 64 24 58 74 79 48 85 ed 0f
RSP: 0000:ffffc900001579e0 EFLAGS: 00000046
RAX: ffffe8ffffc85dc8 RBX: ffffe8ffffc85dd0 RCX: 1ffff1100807bbb4
RDX: 0000000000000001 RSI: ffff8880403ddd80 RDI: ffff8880403ddda0
RBP: 0000000000000000 R08: ffffc90000157cc8 R09: 1ffff11003a5c200
R10: dffffc0000000000 R11: ffffffff81970460 R12: ffffe8ffffc85d80
R13: ffff8880403ddd80 R14: 0000000000000000 R15: 1ffffd1ffff90bba
FS:  0000000000000000(0000) GS:ffff888126391000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f09d74bce10 CR3: 000000003a26c000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 set_next_entity kernel/sched/fair.c:6337 [inline]
 set_next_task_fair+0x106/0xce0 kernel/sched/fair.c:15045
 __pick_next_task+0x372/0x3c0 kernel/sched/core.c:6158
 pick_next_task kernel/sched/core.c:-1 [inline]
 __schedule+0x864/0x5500 kernel/sched/core.c:7143
 __schedule_loop kernel/sched/core.c:7307 [inline]
 schedule+0x164/0x360 kernel/sched/core.c:7322
 smpboot_thread_fn+0x5f9/0xa80 kernel/smpboot.c:156
 kthread+0x388/0x470 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>