syzbot

INFO: task kworker/0:3:5092 blocked for more than 143 seconds.
      Not tainted 6.4.0-rc3-syzkaller-00008-gae8373a5add4 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:3     state:D stack:27992 pid:5092  ppid:2      flags:0x00004000
Workqueue: events rfkill_sync_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5343 [inline]
 __schedule+0xc9a/0x5880 kernel/sched/core.c:6669
 schedule+0xde/0x1a0 kernel/sched/core.c:6745
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6804
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747
 device_lock include/linux/device.h:837 [inline]
 nfc_dev_down+0x2d/0x2d0 net/nfc/core.c:143
 nfc_rfkill_set_block+0x33/0xd0 net/nfc/core.c:179
 rfkill_set_block+0x1f9/0x540 net/rfkill/core.c:345
 rfkill_sync_work+0x8e/0xc0 net/rfkill/core.c:1042
 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
 kthread+0x344/0x440 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
INFO: task kworker/0:4:5193 blocked for more than 143 seconds.
      Not tainted 6.4.0-rc3-syzkaller-00008-gae8373a5add4 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:4     state:D stack:27992 pid:5193  ppid:2      flags:0x00004000
Workqueue: events rfkill_global_led_trigger_worker
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5343 [inline]
 __schedule+0xc9a/0x5880 kernel/sched/core.c:6669
 schedule+0xde/0x1a0 kernel/sched/core.c:6745
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6804
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747
 rfkill_global_led_trigger_worker+0x1b/0x120 net/rfkill/core.c:181
 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
 kthread+0x344/0x440 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
INFO: task syz-executor981:29049 blocked for more than 143 seconds.
      Not tainted 6.4.0-rc3-syzkaller-00008-gae8373a5add4 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor981 state:D stack:27688 pid:29049 ppid:5047   flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5343 [inline]
 __schedule+0xc9a/0x5880 kernel/sched/core.c:6669
 schedule+0xde/0x1a0 kernel/sched/core.c:6745
 schedule_timeout+0x276/0x2b0 kernel/time/timer.c:2143
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common+0x1ce/0x5c0 kernel/sched/completion.c:106
 __flush_work+0x595/0xb60 kernel/workqueue.c:3189
 __cancel_work_timer+0x3f9/0x570 kernel/workqueue.c:3276
 rfkill_unregister+0x95/0x2c0 net/rfkill/core.c:1124
 nfc_unregister_device+0x96/0x330 net/nfc/core.c:1167
 virtual_ncidev_close+0x52/0xb0 drivers/nfc/virtual_ncidev.c:163
 __fput+0x27c/0xa90 fs/file_table.c:321
 task_work_run+0x16f/0x270 kernel/task_work.c:179
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xad3/0x2960 kernel/exit.c:871
 do_group_exit+0xd4/0x2a0 kernel/exit.c:1021
 __do_sys_exit_group kernel/exit.c:1032 [inline]
 __se_sys_exit_group kernel/exit.c:1030 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1030
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f9872c4c689
RSP: 002b:00007ffdc6268d88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f9872cb9310 RCX: 00007f9872c4c689
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000140
R10: 0000000000000140 R11: 0000000000000246 R12: 00007f9872cb9310
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
 #0: ffffffff8c7954f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:518
1 lock held by rcu_tasks_trace/13:
 #0: ffffffff8c7951f0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:518
1 lock held by khungtaskd/27:
 #0: ffffffff8c796100 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6545
2 locks held by getty/4753:
 #0: ffff88802312f098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc900020282f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2176
4 locks held by kworker/0:3/5092:
 #0: ffff888012469d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888012469d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888012469d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline]
 #0: ffff888012469d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline]
 #0: ffff888012469d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline]
 #0: ffff888012469d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2376
 #1: ffffc90003517db0 ((work_completion)(&rfkill->sync_work)){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2380
 #2: ffffffff8e542768 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_sync_work+0x1c/0xc0 net/rfkill/core.c:1040
 #3: ffff888028010100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:837 [inline]
 #3: ffff888028010100 (&dev->mutex){....}-{3:3}, at: nfc_dev_down+0x2d/0x2d0 net/nfc/core.c:143
3 locks held by kworker/0:4/5193:
 #0: ffff888012469d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888012469d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888012469d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline]
 #0: ffff888012469d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline]
 #0: ffff888012469d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline]
 #0: ffff888012469d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2376
 #1: ffffc900036a7db0 ((work_completion)(&rfkill_global_led_trigger_work)){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2380
 #2: ffffffff8e542768 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_global_led_trigger_worker+0x1b/0x120 net/rfkill/core.c:181
1 lock held by syz-executor981/29049:
 #0: ffff888028010100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:837 [inline]
 #0: ffff888028010100 (&dev->mutex){....}-{3:3}, at: nfc_unregister_device+0x62/0x330 net/nfc/core.c:1165

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 6.4.0-rc3-syzkaller-00008-gae8373a5add4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x29c/0x350 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x2a4/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xe16/0x1090 kernel/hung_task.c:379
 kthread+0x344/0x440 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 1067 Comm: kworker/u4:5 Not tainted 6.4.0-rc3-syzkaller-00008-gae8373a5add4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:memcmp+0x186/0x1c0 lib/string.c:695
Code: c2 40 84 d6 0f 84 48 ff ff ff be 08 00 00 00 4c 89 e7 e8 9d 92 d4 f7 e9 4b ff ff ff 48 83 c4 08 31 c0 5b 5d 41 5c 41 5d 41 5e <c3> 48 89 df 89 44 24 04 e8 3d 91 d4 f7 8b 44 24 04 e9 fe fe ff ff
RSP: 0018:ffffc900055df9d8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000
RDX: 000000000000000f RSI: ffffc900055dfb38 RDI: ffffffff81d4e987
RBP: ffff888012468558 R08: 0000000000000001 R09: ffff88801246262f
R10: ffffed100248c4c5 R11: 0000000000000000 R12: ffffffff81d4e987
R13: 0000000000000001 R14: 0000000000000988 R15: ffffffff8c8f03e0
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005600810c8270 CR3: 000000000c571000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 memcmp include/linux/fortify-string.h:665 [inline]
 __text_poke+0x627/0x890 arch/x86/kernel/alternative.c:1641
 text_poke arch/x86/kernel/alternative.c:1669 [inline]
 text_poke_bp_batch+0x4d3/0x770 arch/x86/kernel/alternative.c:2048
 text_poke_flush arch/x86/kernel/alternative.c:2161 [inline]
 text_poke_flush arch/x86/kernel/alternative.c:2158 [inline]
 text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:2168
 arch_jump_label_transform_apply+0x17/0x30 arch/x86/kernel/jump_label.c:146
 jump_label_update+0x32f/0x410 kernel/jump_label.c:829
 static_key_disable_cpuslocked+0x156/0x1b0 kernel/jump_label.c:235
 static_key_disable+0x1a/0x20 kernel/jump_label.c:243
 toggle_allocation_gate mm/kfence/core.c:836 [inline]
 toggle_allocation_gate+0x143/0x230 mm/kfence/core.c:823
 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
 kthread+0x344/0x440 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>