INFO: task kworker/0:1:22001 blocked for more than 143 seconds. Not tainted 6.6.0-rc4-syzkaller-00031-gba7d997a2a29 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:1 state:D stack:25536 pid:22001 ppid:2 flags:0x00004000 Workqueue: events nfc_urelease_event_work Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0xee1/0x5a10 kernel/sched/core.c:6695 schedule+0xe7/0x1b0 kernel/sched/core.c:6771 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6830 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x969/0x1340 kernel/locking/mutex.c:747 nfc_urelease_event_work+0xbb/0x310 net/nfc/netlink.c:1843 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 INFO: task kworker/0:5:23860 blocked for more than 143 seconds. Not tainted 6.6.0-rc4-syzkaller-00031-gba7d997a2a29 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:5 state:D stack:20272 pid:23860 ppid:2 flags:0x00004000 Workqueue: events nfc_urelease_event_work Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0xee1/0x5a10 kernel/sched/core.c:6695 schedule+0xe7/0x1b0 kernel/sched/core.c:6771 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6830 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x969/0x1340 kernel/locking/mutex.c:747 nfc_urelease_event_work+0xbb/0x310 net/nfc/netlink.c:1843 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 INFO: task kworker/0:2:28731 blocked for more than 143 seconds. Not tainted 6.6.0-rc4-syzkaller-00031-gba7d997a2a29 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:2 state:D stack:22496 pid:28731 ppid:2 flags:0x00004000 Workqueue: events nfc_urelease_event_work Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0xee1/0x5a10 kernel/sched/core.c:6695 schedule+0xe7/0x1b0 kernel/sched/core.c:6771 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6830 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x969/0x1340 kernel/locking/mutex.c:747 nfc_urelease_event_work+0xbb/0x310 net/nfc/netlink.c:1843 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 INFO: task kworker/0:3:29101 blocked for more than 143 seconds. Not tainted 6.6.0-rc4-syzkaller-00031-gba7d997a2a29 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:3 state:D stack:26576 pid:29101 ppid:2 flags:0x00004000 Workqueue: events nfc_urelease_event_work Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0xee1/0x5a10 kernel/sched/core.c:6695 schedule+0xe7/0x1b0 kernel/sched/core.c:6771 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6830 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x969/0x1340 kernel/locking/mutex.c:747 nfc_urelease_event_work+0xbb/0x310 net/nfc/netlink.c:1843 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 INFO: task kworker/0:4:30988 blocked for more than 144 seconds. Not tainted 6.6.0-rc4-syzkaller-00031-gba7d997a2a29 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:4 state:D stack:25712 pid:30988 ppid:2 flags:0x00004000 Workqueue: events nfc_urelease_event_work Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0xee1/0x5a10 kernel/sched/core.c:6695 schedule+0xe7/0x1b0 kernel/sched/core.c:6771 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6830 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x969/0x1340 kernel/locking/mutex.c:747 nfc_urelease_event_work+0xbb/0x310 net/nfc/netlink.c:1843 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 INFO: task kworker/1:6:31154 blocked for more than 144 seconds. Not tainted 6.6.0-rc4-syzkaller-00031-gba7d997a2a29 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:6 state:D stack:25616 pid:31154 ppid:2 flags:0x00004000 Workqueue: events nfc_urelease_event_work Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0xee1/0x5a10 kernel/sched/core.c:6695 schedule+0xe7/0x1b0 kernel/sched/core.c:6771 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6830 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x969/0x1340 kernel/locking/mutex.c:747 nfc_urelease_event_work+0xbb/0x310 net/nfc/netlink.c:1843 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 INFO: task kworker/1:1:4976 blocked for more than 144 seconds. Not tainted 6.6.0-rc4-syzkaller-00031-gba7d997a2a29 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:1 state:D stack:26496 pid:4976 ppid:2 flags:0x00004000 Workqueue: events nfc_urelease_event_work Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0xee1/0x5a10 kernel/sched/core.c:6695 schedule+0xe7/0x1b0 kernel/sched/core.c:6771 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6830 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x969/0x1340 kernel/locking/mutex.c:747 nfc_urelease_event_work+0xbb/0x310 net/nfc/netlink.c:1843 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 INFO: task kworker/1:3:5084 blocked for more than 144 seconds. Not tainted 6.6.0-rc4-syzkaller-00031-gba7d997a2a29 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:3 state:D stack:26768 pid:5084 ppid:2 flags:0x00004000 Workqueue: events nfc_urelease_event_work Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0xee1/0x5a10 kernel/sched/core.c:6695 schedule+0xe7/0x1b0 kernel/sched/core.c:6771 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6830 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x969/0x1340 kernel/locking/mutex.c:747 nci_request net/nfc/nci/core.c:149 [inline] nci_stop_poll+0xf9/0x1c0 net/nfc/nci/core.c:873 nfc_stop_poll+0x10e/0x270 net/nfc/core.c:259 nfc_urelease_event_work+0x1d9/0x310 net/nfc/netlink.c:1852 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 INFO: task kworker/0:8:6021 blocked for more than 145 seconds. Not tainted 6.6.0-rc4-syzkaller-00031-gba7d997a2a29 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:8 state:D stack:25456 pid:6021 ppid:2 flags:0x00004000 Workqueue: events nfc_urelease_event_work Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0xee1/0x5a10 kernel/sched/core.c:6695 schedule+0xe7/0x1b0 kernel/sched/core.c:6771 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6830 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x969/0x1340 kernel/locking/mutex.c:747 nfc_urelease_event_work+0xbb/0x310 net/nfc/netlink.c:1843 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 INFO: task kworker/u4:15:8966 blocked for more than 145 seconds. Not tainted 6.6.0-rc4-syzkaller-00031-gba7d997a2a29 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:15 state:D stack:28032 pid:8966 ppid:2 flags:0x00004000 Workqueue: nfc2_nci_rx_wq nci_rx_work Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0xee1/0x5a10 kernel/sched/core.c:6695 schedule+0xe7/0x1b0 kernel/sched/core.c:6771 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6830 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x969/0x1340 kernel/locking/mutex.c:747 device_lock include/linux/device.h:992 [inline] nfc_targets_found+0xe8/0x3d0 net/nfc/core.c:778 nci_rf_discover_ntf_packet net/nfc/nci/ntf.c:390 [inline] nci_ntf_packet+0x1478/0x2ce0 net/nfc/nci/ntf.c:798 nci_rx_work+0x17f/0x320 net/nfc/nci/core.c:1517 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 Future hung task reports are suppressed, see sysctl kernel.hung_task_warnings Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffffffff8cbab2a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline] #0: ffffffff8cbab2a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline] #0: ffffffff8cbab2a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613 2 locks held by klogd/4476: #0: ffff8880b983c718 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:558 #1: ffff8880b9828888 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x20c/0x900 kernel/sched/psi.c:987 2 locks held by getty/4789: #0: ffff88814bdc00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc5/0x1480 drivers/tty/n_tty.c:2206 3 locks held by kworker/1:0/10140: #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605 #1: ffffc900034dfd80 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606 #2: ffffffff8eae0e88 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xbb/0x310 net/nfc/netlink.c:1843 3 locks held by kworker/1:4/11880: #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605 #1: ffffc900099e7d80 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606 #2: ffffffff8eae0e88 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xbb/0x310 net/nfc/netlink.c:1843 3 locks held by kworker/0:1/22001: #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605 #1: ffffc90009c17d80 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606 #2: ffffffff8eae0e88 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xbb/0x310 net/nfc/netlink.c:1843 3 locks held by kworker/1:2/23283: #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605 #1: ffffc900150c7d80 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606 #2: ffffffff8eae0e88 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xbb/0x310 net/nfc/netlink.c:1843 3 locks held by kworker/0:5/23860: #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605 #1: ffffc9000395fd80 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606 #2: ffffffff8eae0e88 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xbb/0x310 net/nfc/netlink.c:1843 3 locks held by kworker/0:2/28731: #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605 #1: ffffc900053b7d80 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606 #2: ffffffff8eae0e88 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xbb/0x310 net/nfc/netlink.c:1843 3 locks held by kworker/0:3/29101: #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605 #1: ffffc9000e7cfd80 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606 #2: ffffffff8eae0e88 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xbb/0x310 net/nfc/netlink.c:1843 3 locks held by kworker/0:4/30988: #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605 #1: ffffc90015877d80 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606 #2: ffffffff8eae0e88 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xbb/0x310 net/nfc/netlink.c:1843 3 locks held by kworker/1:6/31154: #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605 #1: ffffc90016227d80 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606 #2: ffffffff8eae0e88 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xbb/0x310 net/nfc/netlink.c:1843 3 locks held by kworker/1:1/4976: #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605 #1: ffffc9000391fd80 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606 #2: ffffffff8eae0e88 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xbb/0x310 net/nfc/netlink.c:1843 6 locks held by kworker/1:3/5084: #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605 #1: ffffc9000420fd80 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606 #2: ffffffff8eae0e88 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xbb/0x310 net/nfc/netlink.c:1843 #3: ffff88807cf97508 (&genl_data->genl_data_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0x173/0x310 net/nfc/netlink.c:1849 #4: ffff88807cf97100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline] #4: ffff88807cf97100 (&dev->mutex){....}-{3:3}, at: nfc_stop_poll+0x2d/0x270 net/nfc/core.c:247 #5: ffff888083dd8350 (&ndev->req_lock){+.+.}-{3:3}, at: nci_request net/nfc/nci/core.c:149 [inline] #5: ffff888083dd8350 (&ndev->req_lock){+.+.}-{3:3}, at: nci_stop_poll+0xf9/0x1c0 net/nfc/nci/core.c:873 2 locks held by kworker/1:5/5109: #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605 #1: ffffc90004717d80 ((work_completion)(&dev->recv_work)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606 3 locks held by kworker/0:8/6021: #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605 #1: ffffc9000e77fd80 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606 #2: ffffffff8eae0e88 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xbb/0x310 net/nfc/netlink.c:1843 5 locks held by kworker/u4:4/8952: 3 locks held by kworker/u4:15/8966: #0: ffff88802131e938 ((wq_completion)nfc2_nci_rx_wq#2){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605 #1: ffffc90004ed7d80 ((work_completion)(&ndev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606 #2: ffff88807cf97100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline] #2: ffff88807cf97100 (&dev->mutex){....}-{3:3}, at: nfc_targets_found+0xe8/0x3d0 net/nfc/core.c:778 1 lock held by syz-executor.4/10735: #0: ffff888083dd8350 (&ndev->req_lock){+.+.}-{3:3}, at: nci_close_device+0x6d/0x380 net/nfc/nci/core.c:561 2 locks held by syz-executor.3/10765: #0: ffffffff8d6f3868 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x59/0x4c0 drivers/char/misc.c:129 #1: ffffffff8eae0e88 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_register_device+0x32/0x3c0 net/nfc/core.c:1116 1 lock held by syz-executor.0/10774: #0: ffffffff8d6f3868 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x59/0x4c0 drivers/char/misc.c:129 3 locks held by kworker/0:0/10787: #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605 #1: ffffc9000ae47d80 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606 #2: ffffffff8eae0e88 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xbb/0x310 net/nfc/netlink.c:1843 3 locks held by kworker/0:6/10792: #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605 #1: ffffc9000adf7d80 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606 #2: ffffffff8eae0e88 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xbb/0x310 net/nfc/netlink.c:1843 3 locks held by kworker/0:7/10797: #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605 #1: ffffc9000ad57d80 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606 #2: ffffffff8eae0e88 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xbb/0x310 net/nfc/netlink.c:1843 3 locks held by kworker/0:9/10805: #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605 #1: ffffc9000ae87d80 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606 #2: ffffffff8eae0e88 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xbb/0x310 net/nfc/netlink.c:1843 3 locks held by kworker/0:10/10808: #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605 #1: ffffc9000ae97d80 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606 #2: ffffffff8eae0e88 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xbb/0x310 net/nfc/netlink.c:1843 3 locks held by kworker/0:11/10809: #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605 #1: ffffc9000af07d80 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606 #2: ffffffff8eae0e88 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xbb/0x310 net/nfc/netlink.c:1843 3 locks held by kworker/0:13/10846: #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605 #1: ffffc9000af37d80 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606 #2: ffffffff8eae0e88 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xbb/0x310 net/nfc/netlink.c:1843 1 lock held by syz-executor.1/10850: #0: ffffffff8d6f3868 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x59/0x4c0 drivers/char/misc.c:129 1 lock held by syz-executor.4/10858: #0: ffffffff8d6f3868 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x59/0x4c0 drivers/char/misc.c:129 1 lock held by syz-executor.0/10859: #0: ffffffff8d6f3868 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x59/0x4c0 drivers/char/misc.c:129 1 lock held by syz-executor.3/10860: #0: ffffffff8d6f3868 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x59/0x4c0 drivers/char/misc.c:129 1 lock held by syz-executor.4/10865: #0: ffffffff8d6f3868 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x59/0x4c0 drivers/char/misc.c:129 1 lock held by syz-executor.0/10868: #0: ffffffff8d6f3868 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x59/0x4c0 drivers/char/misc.c:129 1 lock held by syz-executor.3/10869: #0: ffffffff8d6f3868 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x59/0x4c0 drivers/char/misc.c:129 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc4-syzkaller-00031-gba7d997a2a29 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x277/0x380 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x299/0x300 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+0xf87/0x1210 kernel/hung_task.c:379 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 8963 Comm: kworker/u4:14 Not tainted 6.6.0-rc4-syzkaller-00031-gba7d997a2a29 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 Workqueue: bat_events batadv_nc_worker RIP: 0010:__lock_acquire+0x2/0x5de0 kernel/locking/lockdep.c:4992 Code: 94 5e 75 00 e9 46 ff ff ff 48 c7 c7 d4 8d ce 8e e8 83 5e 75 00 e9 58 fe ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 41 57 <41> 89 cf 49 89 fa 48 b9 00 00 00 00 00 fc ff df 41 56 41 55 41 89 RSP: 0018:ffffc90004937a90 EFLAGS: 00000006 RAX: 0000000000000200 RBX: 1ffff92000926f5b RCX: 0000000000000002 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8cbab2a0 RBP: 0000000000000200 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8ece5857 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffffffff8cbab2a0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c004f05000 CR3: 000000000c976000 CR4: 0000000000350ef0 Call Trace: lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 rcu_lock_acquire include/linux/rcupdate.h:303 [inline] rcu_read_lock include/linux/rcupdate.h:749 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline] batadv_nc_worker+0x16e/0x10e0 net/batman-adv/network-coding.c:719 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304