INFO: task kworker/0:8:4376 blocked for more than 143 seconds.
Not tainted 6.1.141-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:8 state:D stack:25160 pid:4376 ppid:2 flags:0x00004000
Workqueue: events rfkill_global_led_trigger_worker
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10e9/0x40d0 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 syz.0.170:5242 blocked for more than 143 seconds.
Not tainted 6.1.141-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.170 state:D stack:25856 pid:5242 ppid:4250 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10e9/0x40d0 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_unregister+0xc4/0x220 net/rfkill/core.c:1130
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+0xb1/0x140 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: 0033:0x7f0c16d8e929
RSP: 002b:00007ffef6fa4db8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 0000000000030c62 RCX: 00007f0c16d8e929
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f0c16fb7ba0 R08: 0000000000000001 R09: 00000013f6fa50af
R10: 00007f0c16a00000 R11: 0000000000000246 R12: 00007f0c16fb5fac
R13: 00007f0c16fb5fa0 R14: ffffffffffffffff R15: 00007ffef6fa4ed0
INFO: task syz.2.174:5272 blocked for more than 143 seconds.
Not tainted 6.1.141-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.174 state:D stack:24456 pid:5272 ppid:4259 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10e9/0x40d0 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_fop_write+0x458/0x560 net/rfkill/core.c:1286
vfs_write+0x2c4/0x960 fs/read_write.c:582
ksys_write+0x143/0x240 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7efcd498e929
RSP: 002b:00007efcd5731038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007efcd4bb6240 RCX: 00007efcd498e929
RDX: 0000000000000008 RSI: 0000200000000080 RDI: 0000000000000007
RBP: 00007efcd4a10b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007efcd4bb6240 R15: 00007ffc30927088
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8c92b430 (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: ffffffff8c92bc50 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/27:
#0: ffffffff8c92aaa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8c92aaa0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8c92aaa0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6513
2 locks held by getty/4013:
#0: ffff88814d066098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc9000326b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41b/0x1380 drivers/tty/n_tty.c:2198
3 locks held by kworker/0:8/4376:
#0: ffff888017470938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#1: ffffc9000482fd00 ((work_completion)(&rfkill_global_led_trigger_work)){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#2: ffffffff8ddefc68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_global_led_trigger_worker+0x23/0xc0 net/rfkill/core.c:181
2 locks held by syz-executor/4859:
#0: ffffffff8d09f3c8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
#1: ffffffff8ddefc68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_open+0x12b/0x680 net/rfkill/core.c:1163
1 lock held by syz-executor/4882:
#0: ffffffff8d09f3c8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
2 locks held by syz.0.170/5242:
#0: ffff8880768aa100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:837 [inline]
#0: ffff8880768aa100 (&dev->mutex){....}-{3:3}, at: nfc_unregister_device+0x5f/0x290 net/nfc/core.c:1165
#1: ffffffff8ddefc68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_unregister+0xc4/0x220 net/rfkill/core.c:1130
2 locks held by syz.2.174/5272:
#0: ffffffff8ddefc68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x19e/0x560 net/rfkill/core.c:1278
#1: ffff8880768aa100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:837 [inline]
#1: ffff8880768aa100 (&dev->mutex){....}-{3:3}, at: nfc_dev_down net/nfc/core.c:143 [inline]
#1: ffff8880768aa100 (&dev->mutex){....}-{3:3}, at: nfc_rfkill_set_block+0x4c/0x2d0 net/nfc/core.c:179
1 lock held by syz-executor/5338:
#0: ffffffff8d09f3c8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz.3.183/5355:
#0: ffffffff8d09f3c8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/5374:
#0: ffffffff8d09f3c8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/5379:
#0: ffffffff8d09f3c8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/5488:
#0: ffffffff8d09f3c8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/5674:
#0: ffffffff8d09f3c8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/5878:
#0: ffffffff8d09f3c8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/5881:
#0: ffffffff8d09f3c8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/5882:
#0: ffffffff8d09f3c8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/5884:
#0: ffffffff8d09f3c8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/5894:
#0: ffffffff8d09f3c8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/5900:
#0: ffffffff8d09f3c8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/5902:
#0: ffffffff8d09f3c8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/5904:
#0: ffffffff8d09f3c8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/5906:
#0: ffffffff8d09f3c8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
1 lock held by syz-executor/5916:
#0: ffffffff8d09f3c8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x56/0x360 drivers/char/misc.c:107
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 6.1.141-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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: 4380 Comm: kworker/u4:16 Not tainted 6.1.141-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: bat_events batadv_nc_worker
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:101 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x62/0x290 mm/kasan/generic.c:189
Code: ff df 49 89 fb 49 c1 eb 03 49 b8 00 00 00 00 00 fc ff df 4f 8d 0c 03 48 8d 5c 37 ff 48 c1 eb 03 4e 8d 14 3b 4d 89 d6 4d 29 ce <49> 83 fe 10 7f 26 4d 85 f6 0f 84 39 01 00 00 48 f7 d3 4c 01 db 41
RSP: 0018:ffffc9000486f820 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 1ffffffff2117048 RCX: ffffffff81630285
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff908b8240
RBP: ffffc9000486fa90 R08: dffffc0000000000 R09: fffffbfff2117048
R10: fffffbfff2117049 R11: 1ffffffff2117048 R12: 00000000f7ab91c4
R13: 0000000097cf9c4b R14: 0000000000000001 R15: dffffc0000000001
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1bc70e7d60 CR3: 000000000c68e000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
instrument_atomic_read include/linux/instrumented.h:72 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
hlock_class kernel/locking/lockdep.c:228 [inline]
__lock_acquire+0x12e5/0x7c50 kernel/locking/lockdep.c:5046
lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662
rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
rcu_read_lock include/linux/rcupdate.h:791 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0xeb/0x600 net/batman-adv/network-coding.c:719
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