INFO: task kworker/1:5:5087 blocked for more than 143 seconds. Not tainted 6.3.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:5 state:D stack:26888 pid:5087 ppid:2 flags:0x00004000 Workqueue: events rfkill_global_led_trigger_worker Call Trace: context_switch kernel/sched/core.c:5304 [inline] __schedule+0xc01/0x56c0 kernel/sched/core.c:6622 schedule+0xde/0x1a0 kernel/sched/core.c:6698 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6757 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747 rfkill_global_led_trigger_worker+0x14/0xf0 net/rfkill/core.c:181 process_one_work+0x865/0x1400 kernel/workqueue.c:2390 worker_thread+0x59c/0xec0 kernel/workqueue.c:2537 kthread+0x298/0x340 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 INFO: task syz-executor.0:7115 blocked for more than 143 seconds. Not tainted 6.3.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:27904 pid:7115 ppid:6573 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5304 [inline] __schedule+0xc01/0x56c0 kernel/sched/core.c:6622 schedule+0xde/0x1a0 kernel/sched/core.c:6698 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6757 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747 rfkill_unregister+0xca/0x290 net/rfkill/core.c:1130 nfc_unregister_device+0x6c/0x2d0 net/nfc/core.c:1167 virtual_ncidev_close+0x4e/0xb0 drivers/nfc/virtual_ncidev.c:163 __fput+0x1fa/0x9a0 fs/file_table.c:321 task_work_run+0x12f/0x220 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fb98503df7b RSP: 002b:00007ffd240875f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007fb98503df7b RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 00007fb9851ad980 R08: 0000000000000000 R09: 00007fb984c00160 R10: 0000000000000000 R11: 0000000000000293 R12: 000000000001d1cc R13: 00007ffd240876f0 R14: 00007fb9851abf80 R15: 0000000000000032 INFO: task syz-executor.2:7118 blocked for more than 143 seconds. Not tainted 6.3.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:28016 pid:7118 ppid:6010 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5304 [inline] __schedule+0xc01/0x56c0 kernel/sched/core.c:6622 schedule+0xde/0x1a0 kernel/sched/core.c:6698 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6757 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747 rfkill_unregister+0xca/0x290 net/rfkill/core.c:1130 nfc_unregister_device+0x6c/0x2d0 net/nfc/core.c:1167 virtual_ncidev_close+0x4e/0xb0 drivers/nfc/virtual_ncidev.c:163 __fput+0x1fa/0x9a0 fs/file_table.c:321 task_work_run+0x12f/0x220 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7ff25623df7b RSP: 002b:00007fff1d527c30 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007ff25623df7b RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 00007ff2563ad980 R08: 0000000000000000 R09: 00007ff255e00160 R10: 0000000000000000 R11: 0000000000000293 R12: 000000000001d1de R13: 00007fff1d527d30 R14: 00007ff2563ac050 R15: 0000000000000032 INFO: task syz-executor.4:7122 blocked for more than 143 seconds. Not tainted 6.3.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:28056 pid:7122 ppid:6049 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5304 [inline] __schedule+0xc01/0x56c0 kernel/sched/core.c:6622 schedule+0xde/0x1a0 kernel/sched/core.c:6698 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6757 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747 rfkill_unregister+0xca/0x290 net/rfkill/core.c:1130 nfc_unregister_device+0x6c/0x2d0 net/nfc/core.c:1167 virtual_ncidev_close+0x4e/0xb0 drivers/nfc/virtual_ncidev.c:163 __fput+0x1fa/0x9a0 fs/file_table.c:321 task_work_run+0x12f/0x220 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f6e3643df7b RSP: 002b:00007ffd2c3bf200 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f6e3643df7b RDX: 00007f6e36000298 RSI: ffffffffffffffff RDI: 0000000000000003 RBP: 00007f6e365ad980 R08: 0000000000000000 R09: 00007f6e36000000 R10: 00007f6e360002a0 R11: 0000000000000293 R12: 000000000001cf12 R13: 00007ffd2c3bf300 R14: 00007f6e365abf80 R15: 0000000000000032 INFO: task syz-executor.1:7124 blocked for more than 144 seconds. Not tainted 6.3.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28224 pid:7124 ppid:6580 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5304 [inline] __schedule+0xc01/0x56c0 kernel/sched/core.c:6622 schedule+0xde/0x1a0 kernel/sched/core.c:6698 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6757 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747 rfkill_unregister+0xca/0x290 net/rfkill/core.c:1130 nfc_unregister_device+0x6c/0x2d0 net/nfc/core.c:1167 virtual_ncidev_close+0x4e/0xb0 drivers/nfc/virtual_ncidev.c:163 __fput+0x1fa/0x9a0 fs/file_table.c:321 task_work_run+0x12f/0x220 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fb0f2e3df7b RSP: 002b:00007ffd83cbf050 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007fb0f2e3df7b RDX: 0000001b2ef20000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007fb0f2fad980 R08: 0000000000000000 R09: 00007ffd83d79080 R10: 00007ffd83d79090 R11: 0000000000000293 R12: 000000000001d1f2 R13: 00007ffd83cbf150 R14: 00007ffd83cbf170 R15: 0000000000000032 INFO: task syz-executor.1:7129 blocked for more than 144 seconds. Not tainted 6.3.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:26856 pid:7129 ppid:6580 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5304 [inline] __schedule+0xc01/0x56c0 kernel/sched/core.c:6622 schedule+0xde/0x1a0 kernel/sched/core.c:6698 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6757 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747 device_lock include/linux/device.h:832 [inline] nfc_dev_down+0x23/0x270 net/nfc/core.c:143 nfc_rfkill_set_block+0x19/0xa0 net/nfc/core.c:179 rfkill_set_block+0x191/0x440 net/rfkill/core.c:345 rfkill_fop_write+0x237/0x480 net/rfkill/core.c:1286 vfs_write+0x209/0xd80 fs/read_write.c:582 ksys_write+0x16f/0x1c0 fs/read_write.c:637 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: 0033:0x7fb0f2e8c0c9 RSP: 002b:00007fb0f3cd2168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fb0f2fabf80 RCX: 00007fb0f2e8c0c9 RDX: 0000000000000008 RSI: 0000000020000080 RDI: 0000000000000004 RBP: 00007fb0f2ee7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd83cbefef R14: 00007fb0f3cd2300 R15: 0000000000022000 INFO: task syz-executor.5:7161 blocked for more than 144 seconds. Not tainted 6.3.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:27656 pid:7161 ppid:6574 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5304 [inline] __schedule+0xc01/0x56c0 kernel/sched/core.c:6622 schedule+0xde/0x1a0 kernel/sched/core.c:6698 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6757 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747 rfkill_register+0x2c/0xa00 net/rfkill/core.c:1057 nfc_register_device+0xec/0x340 net/nfc/core.c:1132 nci_register_device+0x7a3/0xb00 net/nfc/nci/core.c:1257 virtual_ncidev_open+0x137/0x200 drivers/nfc/virtual_ncidev.c:148 misc_open+0x2f9/0x410 drivers/char/misc.c:165 chrdev_open+0x213/0x650 fs/char_dev.c:414 do_dentry_open+0x452/0x1140 fs/open.c:920 do_open fs/namei.c:3560 [inline] path_openat+0x12a5/0x2280 fs/namei.c:3715 do_filp_open+0x1a9/0x3e0 fs/namei.c:3742 do_sys_openat2+0x11e/0x3f0 fs/open.c:1348 do_sys_open fs/open.c:1364 [inline] __do_sys_openat fs/open.c:1380 [inline] __se_sys_openat fs/open.c:1375 [inline] __x64_sys_openat+0x11f/0x1d0 fs/open.c:1375 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: 0033:0x7fe52008c0c9 RSP: 002b:00007fe520e60168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fe5201abf80 RCX: 00007fe52008c0c9 RDX: 0000000000000002 RSI: 0000000020000080 RDI: ffffffffffffff9c RBP: 00007fe5200e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffed548b85f R14: 00007fe520e60300 R15: 0000000000022000 INFO: task syz-executor.5:7172 blocked for more than 145 seconds. Not tainted 6.3.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:28464 pid:7172 ppid:6574 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5304 [inline] __schedule+0xc01/0x56c0 kernel/sched/core.c:6622 schedule+0xde/0x1a0 kernel/sched/core.c:6698 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6757 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747 misc_open+0x5e/0x410 drivers/char/misc.c:129 chrdev_open+0x213/0x650 fs/char_dev.c:414 do_dentry_open+0x452/0x1140 fs/open.c:920 do_open fs/namei.c:3560 [inline] path_openat+0x12a5/0x2280 fs/namei.c:3715 do_filp_open+0x1a9/0x3e0 fs/namei.c:3742 do_sys_openat2+0x11e/0x3f0 fs/open.c:1348 do_sys_open fs/open.c:1364 [inline] __do_sys_openat fs/open.c:1380 [inline] __se_sys_openat fs/open.c:1375 [inline] __x64_sys_openat+0x11f/0x1d0 fs/open.c:1375 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: 0033:0x7fe52008c0c9 RSP: 002b:00007fe520e3f168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fe5201ac050 RCX: 00007fe52008c0c9 RDX: 0000000000000801 RSI: 0000000020000040 RDI: ffffffffffffff9c RBP: 00007fe5200e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffed548b85f R14: 00007fe520e3f300 R15: 0000000000022000 INFO: task syz-executor.3:7165 blocked for more than 145 seconds. Not tainted 6.3.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:28144 pid:7165 ppid:5495 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5304 [inline] __schedule+0xc01/0x56c0 kernel/sched/core.c:6622 schedule+0xde/0x1a0 kernel/sched/core.c:6698 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6757 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747 misc_open+0x5e/0x410 drivers/char/misc.c:129 chrdev_open+0x213/0x650 fs/char_dev.c:414 do_dentry_open+0x452/0x1140 fs/open.c:920 do_open fs/namei.c:3560 [inline] path_openat+0x12a5/0x2280 fs/namei.c:3715 do_filp_open+0x1a9/0x3e0 fs/namei.c:3742 do_sys_openat2+0x11e/0x3f0 fs/open.c:1348 do_sys_open fs/open.c:1364 [inline] __do_sys_openat fs/open.c:1380 [inline] __se_sys_openat fs/open.c:1375 [inline] __x64_sys_openat+0x11f/0x1d0 fs/open.c:1375 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: 0033:0x7f37b2e8c0c9 RSP: 002b:00007f37b3c8c168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f37b2fabf80 RCX: 00007f37b2e8c0c9 RDX: 0000000000000002 RSI: 0000000020000080 RDI: ffffffffffffff9c RBP: 00007f37b2ee7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc06857edf R14: 00007f37b3c8c300 R15: 0000000000022000 INFO: task syz-executor.3:7173 blocked for more than 145 seconds. Not tainted 6.3.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:28496 pid:7173 ppid:5495 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5304 [inline] __schedule+0xc01/0x56c0 kernel/sched/core.c:6622 schedule+0xde/0x1a0 kernel/sched/core.c:6698 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6757 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747 misc_open+0x5e/0x410 drivers/char/misc.c:129 chrdev_open+0x213/0x650 fs/char_dev.c:414 do_dentry_open+0x452/0x1140 fs/open.c:920 do_open fs/namei.c:3560 [inline] path_openat+0x12a5/0x2280 fs/namei.c:3715 do_filp_open+0x1a9/0x3e0 fs/namei.c:3742 do_sys_openat2+0x11e/0x3f0 fs/open.c:1348 do_sys_open fs/open.c:1364 [inline] __do_sys_openat fs/open.c:1380 [inline] __se_sys_openat fs/open.c:1375 [inline] __x64_sys_openat+0x11f/0x1d0 fs/open.c:1375 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: 0033:0x7f37b2e8c0c9 RSP: 002b:00007f37b3c6b168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f37b2fac050 RCX: 00007f37b2e8c0c9 RDX: 0000000000000801 RSI: 0000000020000040 RDI: ffffffffffffff9c RBP: 00007f37b2ee7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc06857edf R14: 00007f37b3c6b300 R15: 0000000000022000 Future hung task reports are suppressed, see sysctl kernel.hung_task_warnings Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffffffff8b78c270 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:510 1 lock held by rcu_tasks_trace/13: #0: ffffffff8b78bf70 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:510 1 lock held by khungtaskd/27: #0: ffffffff8b78cdc0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6495 2 locks held by getty/4750: #0: ffff888026489098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x23/0x80 drivers/tty/tty_ldisc.c:244 #1: ffffc900020382f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xb73/0x1040 drivers/tty/n_tty.c:2177 3 locks held by kworker/1:5/5087: #0: ffff888011470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888011470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888011470d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888011470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline] #0: ffff888011470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline] #0: ffff888011470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x1400 kernel/workqueue.c:2361 #1: ffffc90003d0fdb8 ((work_completion)(&rfkill_global_led_trigger_work)){+.+.}-{0:0}, at: process_one_work+0x7b7/0x1400 kernel/workqueue.c:2365 #2: ffffffff8d40e648 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_global_led_trigger_worker+0x14/0xf0 net/rfkill/core.c:181 2 locks held by syz-executor.0/7115: #0: ffff888069f61100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:832 [inline] #0: ffff888069f61100 (&dev->mutex){....}-{3:3}, at: nfc_unregister_device+0x40/0x2d0 net/nfc/core.c:1165 #1: ffffffff8d40e648 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_unregister+0xca/0x290 net/rfkill/core.c:1130 2 locks held by syz-executor.2/7118: #0: ffff88807ee5c100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:832 [inline] #0: ffff88807ee5c100 (&dev->mutex){....}-{3:3}, at: nfc_unregister_device+0x40/0x2d0 net/nfc/core.c:1165 #1: ffffffff8d40e648 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_unregister+0xca/0x290 net/rfkill/core.c:1130 2 locks held by syz-executor.4/7122: #0: ffff88806cc5a100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:832 [inline] #0: ffff88806cc5a100 (&dev->mutex){....}-{3:3}, at: nfc_unregister_device+0x40/0x2d0 net/nfc/core.c:1165 #1: ffffffff8d40e648 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_unregister+0xca/0x290 net/rfkill/core.c:1130 2 locks held by syz-executor.1/7124: #0: ffff88807e538100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:832 [inline] #0: ffff88807e538100 (&dev->mutex){....}-{3:3}, at: nfc_unregister_device+0x40/0x2d0 net/nfc/core.c:1165 #1: ffffffff8d40e648 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_unregister+0xca/0x290 net/rfkill/core.c:1130 2 locks held by syz-executor.1/7129: #0: ffffffff8d40e648 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x11d/0x480 net/rfkill/core.c:1278 #1: ffff88807ee5c100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:832 [inline] #1: ffff88807ee5c100 (&dev->mutex){....}-{3:3}, at: nfc_dev_down+0x23/0x270 net/nfc/core.c:143 3 locks held by syz-executor.5/7161: #0: ffffffff8c20f268 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5e/0x410 drivers/char/misc.c:129 #1: ffff88807c915100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:832 [inline] #1: ffff88807c915100 (&dev->mutex){....}-{3:3}, at: nfc_register_device+0x74/0x340 net/nfc/core.c:1128 #2: ffffffff8d40e648 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x2c/0xa00 net/rfkill/core.c:1057 1 lock held by syz-executor.5/7172: #0: ffffffff8c20f268 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5e/0x410 drivers/char/misc.c:129 1 lock held by syz-executor.3/7165: #0: ffffffff8c20f268 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5e/0x410 drivers/char/misc.c:129 1 lock held by syz-executor.3/7173: #0: ffffffff8c20f268 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5e/0x410 drivers/char/misc.c:129 1 lock held by syz-executor.1/7273: #0: ffffffff8c20f268 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5e/0x410 drivers/char/misc.c:129 1 lock held by syz-executor.4/7275: #0: ffffffff8c20f268 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5e/0x410 drivers/char/misc.c:129 1 lock held by syz-executor.0/7276: #0: ffffffff8c20f268 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5e/0x410 drivers/char/misc.c:129 1 lock held by syz-executor.2/7277: #0: ffffffff8c20f268 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5e/0x410 drivers/char/misc.c:129 1 lock held by syz-executor.5/7280: #0: ffffffff8c20f268 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5e/0x410 drivers/char/misc.c:129 1 lock held by syz-executor.3/7281: #0: ffffffff8c20f268 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5e/0x410 drivers/char/misc.c:129 1 lock held by syz-executor.1/7287: #0: ffffffff8c20f268 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5e/0x410 drivers/char/misc.c:129 1 lock held by syz-executor.0/7290: #0: ffffffff8c20f268 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5e/0x410 drivers/char/misc.c:129 1 lock held by syz-executor.4/7293: #0: ffffffff8c20f268 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5e/0x410 drivers/char/misc.c:129 1 lock held by syz-executor.5/7295: #0: ffffffff8c20f268 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5e/0x410 drivers/char/misc.c:129 1 lock held by syz-executor.2/7296: #0: ffffffff8c20f268 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5e/0x410 drivers/char/misc.c:129 1 lock held by syz-executor.3/7297: #0: ffffffff8c20f268 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5e/0x410 drivers/char/misc.c:129 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 27 Comm: khungtaskd Not tainted 6.3.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x64/0xb0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x175/0x200 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x1bc/0x200 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+0x9f9/0xcf0 kernel/hung_task.c:379 kthread+0x298/0x340 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline] NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt+0x1b/0x20 drivers/acpi/processor_idle.c:112