INFO: task kworker/0:0:7 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:0 state:D stack:23688 pid:7 ppid:2 flags:0x00004000
Workqueue: events rfkill_global_led_trigger_worker
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10ec/0x40b0 kernel/sched/core.c:6561
schedule+0xb9/0x180 kernel/sched/core.c:6637
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6696
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x555/0xaf0 kernel/locking/mutex.c:747
rfkill_global_led_trigger_worker+0x23/0xc0 net/rfkill/core.c:181
process_one_work+0x898/0x1160 kernel/workqueue.c:2292
worker_thread+0xaa2/0x1250 kernel/workqueue.c:2439
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task kworker/0:1:14 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:1 state:D stack:25264 pid:14 ppid:2 flags:0x00004000
Workqueue: events rfkill_sync_work
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10ec/0x40b0 kernel/sched/core.c:6561
schedule+0xb9/0x180 kernel/sched/core.c:6637
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6696
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x555/0xaf0 kernel/locking/mutex.c:747
device_lock include/linux/device.h:837 [inline]
nfc_dev_down net/nfc/core.c:143 [inline]
nfc_rfkill_set_block+0x4c/0x2d0 net/nfc/core.c:179
rfkill_set_block+0x1c6/0x420 net/rfkill/core.c:345
rfkill_sync_work+0x82/0xe0 net/rfkill/core.c:1042
process_one_work+0x898/0x1160 kernel/workqueue.c:2292
worker_thread+0xaa2/0x1250 kernel/workqueue.c:2439
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task syz.2.243:5278 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.243 state:D stack:25440 pid:5278 ppid:4269 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10ec/0x40b0 kernel/sched/core.c:6561
schedule+0xb9/0x180 kernel/sched/core.c:6637
schedule_timeout+0x97/0x280 kernel/time/timer.c:1941
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x2b9/0x590 kernel/sched/completion.c:138
__flush_work+0x912/0xa60 kernel/workqueue.c:3076
__cancel_work_timer+0x3ac/0x520 kernel/workqueue.c:3163
rfkill_unregister+0x8e/0x220 net/rfkill/core.c:1124
nfc_unregister_device+0x92/0x290 net/nfc/core.c:1167
virtual_ncidev_close+0x55/0x90 drivers/nfc/virtual_ncidev.c:170
__fput+0x22c/0x920 fs/file_table.c:320
task_work_run+0x1ca/0x250 kernel/task_work.c:203
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fd2a2f8eec9
RSP: 002b:00007ffd452736b8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fd2a31e7da0 RCX: 00007fd2a2f8eec9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fd2a31e7da0 R08: 0000000000000204 R09: 0000001c452739af
R10: 00000000003ffbd8 R11: 0000000000000246 R12: 00000000000202c4
R13: 00007fd2a31e6180 R14: ffffffffffffffff R15: 00007ffd452737d0
Showing all locks held in the system:
3 locks held by kworker/0:0/7:
#0: ffff888017470938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#1: ffffc900000c7d00 ((work_completion)(&rfkill_global_led_trigger_work)){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#2: ffffffff8dffd148 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_global_led_trigger_worker+0x23/0xc0 net/rfkill/core.c:181
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8cb2b570 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8cb2bd90 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
4 locks held by kworker/0:1/14:
#0: ffff888017470938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#1: ffffc90000137d00 ((work_completion)(&rfkill->sync_work)){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#2: ffffffff8dffd148 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_sync_work+0x25/0xe0 net/rfkill/core.c:1040
#3: ffff888058d5a100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:837 [inline]
#3: ffff888058d5a100 (&dev->mutex){....}-{3:3}, at: nfc_dev_down net/nfc/core.c:143 [inline]
#3: ffff888058d5a100 (&dev->mutex){....}-{3:3}, at: nfc_rfkill_set_block+0x4c/0x2d0 net/nfc/core.c:179
1 lock held by khungtaskd/28:
#0: ffffffff8cb2abe0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8cb2abe0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8cb2abe0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6513
1 lock held by klogd/3626:
#0: ffff8880b8f3aad8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:537
2 locks held by getty/4027:
#0: ffff88802f1b4098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc9000327b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41b/0x1380 drivers/tty/n_tty.c:2198
3 locks held by kworker/u4:8/4514:
1 lock held by syz.2.243/5278:
#0: ffff888058d5a100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:837 [inline]
#0: ffff888058d5a100 (&dev->mutex){....}-{3:3}, at: nfc_unregister_device+0x5f/0x290 net/nfc/core.c:1165
2 locks held by syz.3.270/5386:
#0: ffffffff8d29cf08 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
#1: ffffffff8dffd148 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_open+0x12b/0x680 net/rfkill/core.c:1163
1 lock held by syz.1.289/5442:
#0: ffffffff8d29cf08 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz.1.289/5443:
#0: ffffffff8d29cf08 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz.4.291/5448:
#0: ffffffff8d29cf08 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz.0.293/5461:
#0: ffffffff8d29cf08 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/5467:
#0: ffffffff8d29cf08 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/5469:
#0: ffffffff8d29cf08 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/5472:
#0: ffffffff8d29cf08 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/5473:
#0: ffffffff8d29cf08 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/5475:
#0: ffffffff8d29cf08 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/5481:
#0: ffffffff8d29cf08 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/5483:
#0: ffffffff8d29cf08 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/5486:
#0: ffffffff8d29cf08 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/5487:
#0: ffffffff8d29cf08 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/5489:
#0: ffffffff8d29cf08 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/5495:
#0: ffffffff8d29cf08 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/5497:
#0: ffffffff8d29cf08 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106
nmi_cpu_backtrace+0x3f4/0x470 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1d4/0x450 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+0xeee/0xf30 kernel/hung_task.c:377
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 11 Comm: kworker/u4:1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:insn_get_displacement+0x337/0xa20 arch/x86/lib/insn.c:469
Code: e0 48 c1 e8 03 49 bf 00 00 00 00 00 fc ff df 42 0f b6 04 38 84 c0 0f 85 85 04 00 00 41 0f b6 2c 24 31 ff 89 ee e8 49 11 75 f7 <85> ed 74 75 4d 8d 66 20 4c 89 e0 48 c1 e8 03 42 0f b6 04 38 84 c0
RSP: 0018:ffffc900001077f8 EFLAGS: 00000293
RAX: ffffffff8a0bc007 RBX: 1ffff92000020f32 RCX: 0000000000000000
RDX: ffff88813fec3b80 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: dffffc0000000000 R09: ffffc90000107960
R10: fffff52000020f37 R11: 1ffff92000020f2c R12: ffffc90000107985
R13: ffffc90000107994 R14: ffffc90000107960 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005645ec820000 CR3: 000000000c88e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
insn_get_immediate+0x325/0x1290 arch/x86/lib/insn.c:632
insn_get_length arch/x86/lib/insn.c:707 [inline]
insn_decode+0x386/0x520 arch/x86/lib/insn.c:747
text_poke_loc_init+0xd6/0x570 arch/x86/kernel/alternative.c:1878
arch_jump_label_transform_queue+0x6a/0xd0 arch/x86/kernel/jump_label.c:138
__jump_label_update+0x17d/0x390 kernel/jump_label.c:510
static_key_disable_cpuslocked+0xc1/0x1a0 kernel/jump_label.c:237
static_key_disable+0x16/0x20 kernel/jump_label.c:245
toggle_allocation_gate+0x38f/0x430 mm/kfence/core.c:819
process_one_work+0x898/0x1160 kernel/workqueue.c:2292
worker_thread+0xaa2/0x1250 kernel/workqueue.c:2439
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295