INFO: task kworker/1:9:6672 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:9 state:D stack:20944 pid:6672 ppid:2 flags:0x00004000
Workqueue: events rfkill_global_led_trigger_worker
Call Trace:
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
schedule+0xbd/0x170 kernel/sched/core.c:6773
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6832
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x6b7/0xcc0 kernel/locking/mutex.c:747
rfkill_global_led_trigger_worker+0x27/0xd0 net/rfkill/core.c:182
process_one_work kernel/workqueue.c:2634 [inline]
process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
INFO: task syz.3.2458:12830 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.2458 state:D stack:25320 pid:12830 ppid:12046 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
schedule+0xbd/0x170 kernel/sched/core.c:6773
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6832
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x6b7/0xcc0 kernel/locking/mutex.c:747
device_lock include/linux/device.h:992 [inline]
nfc_dev_down net/nfc/core.c:143 [inline]
nfc_rfkill_set_block+0x50/0x2e0 net/nfc/core.c:179
rfkill_set_block+0x1c6/0x420 net/rfkill/core.c:346
rfkill_fop_write+0x45c/0x570 net/rfkill/core.c:1305
do_loop_readv_writev fs/read_write.c:-1 [inline]
do_iter_write+0x50e/0xc70 fs/read_write.c:862
vfs_writev fs/read_write.c:933 [inline]
do_writev+0x252/0x410 fs/read_write.c:976
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fe2b098eec9
RSP: 002b:00007fe2b183b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007fe2b0be5fa0 RCX: 00007fe2b098eec9
RDX: 0000000000000002 RSI: 0000200000000500 RDI: 000000000000000e
RBP: 00007fe2b0a11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe2b0be6038 R14: 00007fe2b0be5fa0 R15: 00007ffe5dbe2868
INFO: task syz.2.2461:12837 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.2461 state:D stack:27016 pid:12837 ppid:5787 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
schedule+0xbd/0x170 kernel/sched/core.c:6773
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6832
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x6b7/0xcc0 kernel/locking/mutex.c:747
rfkill_unregister+0xc8/0x220 net/rfkill/core.c:1149
nfc_unregister_device+0x96/0x2a0 net/nfc/core.c:1167
virtual_ncidev_close+0x59/0x90 drivers/nfc/virtual_ncidev.c:172
__fput+0x234/0x970 fs/file_table.c:384
task_work_run+0x1ce/0x250 kernel/task_work.c:239
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+0xf6/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f195e18eec9
RSP: 002b:00007fff8a79ddb8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f195e3e7da0 RCX: 00007f195e18eec9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f195e3e7da0 R08: 00000000000014f4 R09: 000000098a79e0af
R10: 00000000003fe8e8 R11: 0000000000000246 R12: 0000000000085703
R13: 00007f195e3e6090 R14: ffffffffffffffff R15: 00007fff8a79ded0
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8cd2ff20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
#0: ffffffff8cd2ff20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
#0: ffffffff8cd2ff20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x290 kernel/locking/lockdep.c:6633
2 locks held by getty/5550:
#0: ffff88814cf4a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000326e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x425/0x1380 drivers/tty/n_tty.c:2217
3 locks held by kworker/1:9/6672:
#0: ffff888017870938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline]
#0: ffff888017870938 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711
#1: ffffc9000436fd00 ((work_completion)(&rfkill_global_led_trigger_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline]
#1: ffffc9000436fd00 ((work_completion)(&rfkill_global_led_trigger_work)){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711
#2: ffffffff8e296e68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_global_led_trigger_worker+0x27/0xd0 net/rfkill/core.c:182
2 locks held by syz-executor/7171:
1 lock held by syz-executor/12568:
#0: ffffffff8e296e68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_unregister+0xc8/0x220 net/rfkill/core.c:1149
2 locks held by syz.3.2458/12830:
#0: ffffffff8e296e68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x1a2/0x570 net/rfkill/core.c:1297
#1: ffff88807d2ec100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
#1: ffff88807d2ec100 (&dev->mutex){....}-{3:3}, at: nfc_dev_down net/nfc/core.c:143 [inline]
#1: ffff88807d2ec100 (&dev->mutex){....}-{3:3}, at: nfc_rfkill_set_block+0x50/0x2e0 net/nfc/core.c:179
2 locks held by syz.2.2461/12837:
#0: ffff88807d2ec100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
#0: ffff88807d2ec100 (&dev->mutex){....}-{3:3}, at: nfc_unregister_device+0x63/0x2a0 net/nfc/core.c:1165
#1: ffffffff8e296e68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_unregister+0xc8/0x220 net/rfkill/core.c:1149
2 locks held by syz-executor/13154:
#0: ffff88807d0ef918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x34/0x650 drivers/bluetooth/hci_vhci.c:479
#1: ffffffff8e296e68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x37/0x8e0 net/rfkill/core.c:1075
2 locks held by syz-executor/13168:
#0: ffff88805e007118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x34/0x650 drivers/bluetooth/hci_vhci.c:479
#1: ffffffff8e296e68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x37/0x8e0 net/rfkill/core.c:1075
2 locks held by syz-executor/13238:
#0: ffff88802183b918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x34/0x650 drivers/bluetooth/hci_vhci.c:479
#1: ffffffff8e296e68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x37/0x8e0 net/rfkill/core.c:1075
2 locks held by syz-executor/13241:
#0: ffff88807d9b9118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x34/0x650 drivers/bluetooth/hci_vhci.c:479
#1: ffffffff8e296e68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x37/0x8e0 net/rfkill/core.c:1075
2 locks held by syz-executor/13250:
#0: ffff8880774d0918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x34/0x650 drivers/bluetooth/hci_vhci.c:479
#1: ffffffff8e296e68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x37/0x8e0 net/rfkill/core.c:1075
2 locks held by syz-executor/13253:
#0: ffff88807dbcc918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x34/0x650 drivers/bluetooth/hci_vhci.c:479
#1: ffffffff8e296e68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x37/0x8e0 net/rfkill/core.c:1075
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 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+0x16c/0x230 lib/dump_stack.c:106
nmi_cpu_backtrace+0x39b/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x2f0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xf41/0xf80 kernel/hung_task.c:379
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 6080 Comm: kworker/u4:10 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: bat_events batadv_nc_worker
RIP: 0010:rcu_read_unlock include/linux/rcupdate.h:815 [inline]
RIP: 0010:batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
RIP: 0010:batadv_nc_worker+0x216/0x610 net/batman-adv/network-coding.c:719
Code: c7 4e f7 e8 dc ab 37 00 89 c3 31 ff 89 c6 e8 d1 ca 4e f7 85 db 74 15 e8 d8 d0 38 f7 84 c0 74 18 e8 0f c7 4e f7 48 8b 5c 24 08 65 e8 03 c7 4e f7 48 8b 5c 24 08 eb 59 e8 a7 ab 37 00 89 c3 31
RSP: 0018:ffffc90005097b60 EFLAGS: 00000293
RAX: ffffffff8a36c3e1 RBX: ffff8880278ebf00 RCX: ffff88802761bc00
RDX: 0000000000000000 RSI: ffffffff8afc63a0 RDI: ffffffff8afc6360
RBP: fffffffffffffe38 R08: dffffc0000000000 R09: 1ffffffff21b4ea0
R10: dffffc0000000000 R11: fffffbfff21b4ea1 R12: dffffc0000000000
R13: ffffffff8a36c2a2 R14: ffff88802e468c80 R15: 0000000000000281
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056225d84ecd0 CR3: 000000002d10f000 CR4: 00000000003506e0
Call Trace:
process_one_work kernel/workqueue.c:2634 [inline]
process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293