INFO: task kworker/0:0:8 blocked for more than 143 seconds. Not tainted 6.6.0-rc4-syzkaller-00284-gb9ddbb0cde2a #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:0 state:D stack:20200 pid:8 ppid:2 flags:0x00004000 Workqueue: events nfc_urelease_event_work Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x196c/0x4af0 kernel/sched/core.c:6695 schedule+0xc3/0x180 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+0x6a3/0xd60 kernel/locking/mutex.c:747 nfc_urelease_event_work+0xa7/0x2f0 net/nfc/netlink.c:1843 process_one_work kernel/workqueue.c:2630 [inline] process_scheduled_works+0x90f/0x1400 kernel/workqueue.c:2703 worker_thread+0xa5f/0xff0 kernel/workqueue.c:2784 kthread+0x2d3/0x370 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 INFO: task kworker/1:3:5098 blocked for more than 143 seconds. Not tainted 6.6.0-rc4-syzkaller-00284-gb9ddbb0cde2a #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:3 state:D stack:21720 pid:5098 ppid:2 flags:0x00004000 Workqueue: events nfc_urelease_event_work Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x196c/0x4af0 kernel/sched/core.c:6695 schedule+0xc3/0x180 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+0x6a3/0xd60 kernel/locking/mutex.c:747 nfc_urelease_event_work+0x111/0x2f0 net/nfc/netlink.c:1849 process_one_work kernel/workqueue.c:2630 [inline] process_scheduled_works+0x90f/0x1400 kernel/workqueue.c:2703 worker_thread+0xa5f/0xff0 kernel/workqueue.c:2784 kthread+0x2d3/0x370 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 INFO: task kworker/1:1:30332 blocked for more than 143 seconds. Not tainted 6.6.0-rc4-syzkaller-00284-gb9ddbb0cde2a #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:1 state:D stack:21368 pid:30332 ppid:2 flags:0x00004000 Workqueue: events nfc_urelease_event_work Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x196c/0x4af0 kernel/sched/core.c:6695 schedule+0xc3/0x180 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+0x6a3/0xd60 kernel/locking/mutex.c:747 nfc_urelease_event_work+0xa7/0x2f0 net/nfc/netlink.c:1843 process_one_work kernel/workqueue.c:2630 [inline] process_scheduled_works+0x90f/0x1400 kernel/workqueue.c:2703 worker_thread+0xa5f/0xff0 kernel/workqueue.c:2784 kthread+0x2d3/0x370 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 INFO: task kworker/1:4:2652 blocked for more than 143 seconds. Not tainted 6.6.0-rc4-syzkaller-00284-gb9ddbb0cde2a #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:4 state:D stack:24040 pid:2652 ppid:2 flags:0x00004000 Workqueue: events nfc_urelease_event_work Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x196c/0x4af0 kernel/sched/core.c:6695 schedule+0xc3/0x180 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+0x6a3/0xd60 kernel/locking/mutex.c:747 nfc_urelease_event_work+0xa7/0x2f0 net/nfc/netlink.c:1843 process_one_work kernel/workqueue.c:2630 [inline] process_scheduled_works+0x90f/0x1400 kernel/workqueue.c:2703 worker_thread+0xa5f/0xff0 kernel/workqueue.c:2784 kthread+0x2d3/0x370 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 INFO: task kworker/u4:0:10690 blocked for more than 144 seconds. Not tainted 6.6.0-rc4-syzkaller-00284-gb9ddbb0cde2a #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:0 state:D stack:20168 pid:10690 ppid:2 flags:0x00004000 Workqueue: nfc2_nci_rx_wq nci_rx_work Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x196c/0x4af0 kernel/sched/core.c:6695 schedule+0xc3/0x180 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+0x6a3/0xd60 kernel/locking/mutex.c:747 device_lock include/linux/device.h:992 [inline] nfc_targets_found+0x26f/0x590 net/nfc/core.c:778 nci_ntf_packet+0x4431/0x4f40 nci_rx_work+0x14c/0x2b0 net/nfc/nci/core.c:1517 process_one_work kernel/workqueue.c:2630 [inline] process_scheduled_works+0x90f/0x1400 kernel/workqueue.c:2703 worker_thread+0xa5f/0xff0 kernel/workqueue.c:2784 kthread+0x2d3/0x370 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 INFO: task kworker/1:2:27027 blocked for more than 144 seconds. Not tainted 6.6.0-rc4-syzkaller-00284-gb9ddbb0cde2a #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:2 state:D stack:25704 pid:27027 ppid:2 flags:0x00004000 Workqueue: events nfc_urelease_event_work Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x196c/0x4af0 kernel/sched/core.c:6695 schedule+0xc3/0x180 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+0x6a3/0xd60 kernel/locking/mutex.c:747 nfc_urelease_event_work+0xa7/0x2f0 net/nfc/netlink.c:1843 process_one_work kernel/workqueue.c:2630 [inline] process_scheduled_works+0x90f/0x1400 kernel/workqueue.c:2703 worker_thread+0xa5f/0xff0 kernel/workqueue.c:2784 kthread+0x2d3/0x370 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 INFO: task syz-executor.4:29165 blocked for more than 144 seconds. Not tainted 6.6.0-rc4-syzkaller-00284-gb9ddbb0cde2a #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:25960 pid:29165 ppid:5085 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x196c/0x4af0 kernel/sched/core.c:6695 schedule+0xc3/0x180 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+0x6a3/0xd60 kernel/locking/mutex.c:747 genl_lock net/netlink/genetlink.c:33 [inline] genl_op_lock net/netlink/genetlink.c:58 [inline] genl_rcv_msg+0x121/0xe50 net/netlink/genetlink.c:1065 netlink_rcv_skb+0x1df/0x430 net/netlink/af_netlink.c:2545 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1075 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0x7dc/0x970 net/netlink/af_netlink.c:1368 netlink_sendmsg+0xa37/0xd70 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] __sys_sendto+0x484/0x640 net/socket.c:2194 __do_sys_sendto net/socket.c:2206 [inline] __se_sys_sendto net/socket.c:2202 [inline] __x64_sys_sendto+0xde/0xf0 net/socket.c:2202 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f1b0da7e7dc RSP: 002b:00007f1b0e7fff60 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f1b0e800050 RCX: 00007f1b0da7e7dc RDX: 0000000000000028 RSI: 00007f1b0e8000a0 RDI: 0000000000000006 RBP: 0000000000000000 R08: 00007f1b0e7fffb4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007f1b0e800008 R14: 00007f1b0e8000a0 R15: 0000000000000000 INFO: task syz-executor.3:29150 blocked for more than 144 seconds. Not tainted 6.6.0-rc4-syzkaller-00284-gb9ddbb0cde2a #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:23112 pid:29150 ppid:5075 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x196c/0x4af0 kernel/sched/core.c:6695 schedule+0xc3/0x180 kernel/sched/core.c:6771 schedule_timeout+0xb0/0x300 kernel/time/timer.c:2143 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common kernel/sched/completion.c:116 [inline] wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion+0x354/0x620 kernel/sched/completion.c:148 __flush_workqueue+0x72e/0x1610 kernel/workqueue.c:3195 nci_close_device+0x193/0x600 net/nfc/nci/core.c:579 nci_unregister_device+0x40/0x240 net/nfc/nci/core.c:1292 virtual_ncidev_close+0x59/0x90 drivers/nfc/virtual_ncidev.c:163 __fput+0x3f8/0x910 fs/file_table.c:384 __do_sys_close fs/open.c:1572 [inline] __se_sys_close+0x15f/0x220 fs/open.c:1557 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f5b7027b9da RSP: 002b:00007ffdd7efc700 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f5b7027b9da RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007f5b7039d980 R08: 0000001b30620000 R09: 0000000000000008 R10: 000000008191d2b3 R11: 0000000000000293 R12: 00000000002eb17c R13: ffffffffffffffff R14: 00007f5b6fe00000 R15: 00000000002eae05 INFO: task syz-executor.3:29169 blocked for more than 145 seconds. Not tainted 6.6.0-rc4-syzkaller-00284-gb9ddbb0cde2a #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:26344 pid:29169 ppid:5075 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x196c/0x4af0 kernel/sched/core.c:6695 schedule+0xc3/0x180 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+0x6a3/0xd60 kernel/locking/mutex.c:747 nci_request net/nfc/nci/core.c:149 [inline] nci_set_local_general_bytes net/nfc/nci/core.c:775 [inline] nci_start_poll+0x5a3/0xf30 net/nfc/nci/core.c:839 nfc_start_poll+0x188/0x300 net/nfc/core.c:225 nfc_genl_start_poll+0x1eb/0x350 net/nfc/netlink.c:828 genl_family_rcv_msg_doit net/netlink/genetlink.c:971 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1051 [inline] genl_rcv_msg+0xad2/0xe50 net/netlink/genetlink.c:1066 netlink_rcv_skb+0x1df/0x430 net/netlink/af_netlink.c:2545 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1075 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0x7dc/0x970 net/netlink/af_netlink.c:1368 netlink_sendmsg+0xa37/0xd70 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x592/0x890 net/socket.c:2558 ___sys_sendmsg net/socket.c:2612 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2641 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f5b7027cae9 RSP: 002b:00007f5b6edfe0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f5b7039c050 RCX: 00007f5b7027cae9 RDX: 0000000000000000 RSI: 0000000020000440 RDI: 0000000000000005 RBP: 00007f5b702c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f5b7039c050 R15: 00007ffdd7efc638 INFO: task syz-executor.5:29157 blocked for more than 145 seconds. Not tainted 6.6.0-rc4-syzkaller-00284-gb9ddbb0cde2a #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:24872 pid:29157 ppid:5067 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x196c/0x4af0 kernel/sched/core.c:6695 schedule+0xc3/0x180 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+0x6a3/0xd60 kernel/locking/mutex.c:747 genl_lock net/netlink/genetlink.c:33 [inline] genl_op_lock net/netlink/genetlink.c:58 [inline] genl_rcv_msg+0x121/0xe50 net/netlink/genetlink.c:1065 netlink_rcv_skb+0x1df/0x430 net/netlink/af_netlink.c:2545 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1075 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0x7dc/0x970 net/netlink/af_netlink.c:1368 netlink_sendmsg+0xa37/0xd70 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x592/0x890 net/socket.c:2558 ___sys_sendmsg net/socket.c:2612 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2641 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fe62187cae9 RSP: 002b:00007fe6226470c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fe62199bf80 RCX: 00007fe62187cae9 RDX: 0000000000000014 RSI: 0000000020000140 RDI: 0000000000000007 RBP: 00007fe6218c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fe62199bf80 R15: 00007ffc3ebecfa8 Future hung task reports are suppressed, see sysctl kernel.hung_task_warnings Showing all locks held in the system: 3 locks held by kworker/0:0/8: #0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline] #0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #1: ffffc900000d7d20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline] #1: ffffc900000d7d20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #2: ffffffff8e7e7c08 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa7/0x2f0 net/nfc/netlink.c:1843 1 lock held by khungtaskd/29: #0: ffffffff8d32c420 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline] #0: ffffffff8d32c420 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline] #0: ffffffff8d32c420 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6613 2 locks held by getty/4793: #0: ffff88814ab9d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900015d72f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b1/0x1dc0 drivers/tty/n_tty.c:2206 4 locks held by kworker/1:3/5098: #0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline] #0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #1: ffffc900048ffd20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline] #1: ffffc900048ffd20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #2: ffffffff8e7e7c08 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa7/0x2f0 net/nfc/netlink.c:1843 #3: ffff888068cd4508 (&genl_data->genl_data_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0x111/0x2f0 net/nfc/netlink.c:1849 3 locks held by kworker/1:1/30332: #0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline] #0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #1: ffffc9000337fd20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline] #1: ffffc9000337fd20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #2: ffffffff8e7e7c08 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa7/0x2f0 net/nfc/netlink.c:1843 3 locks held by kworker/1:4/2652: #0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline] #0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #1: ffffc900038f7d20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline] #1: ffffc900038f7d20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #2: ffffffff8e7e7c08 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa7/0x2f0 net/nfc/netlink.c:1843 3 locks held by kworker/u4:0/10690: #0: ffff88807d52b538 ((wq_completion)nfc2_nci_rx_wq#99){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline] #0: ffff88807d52b538 ((wq_completion)nfc2_nci_rx_wq#99){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #1: ffffc90015947d20 ((work_completion)(&ndev->rx_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline] #1: ffffc90015947d20 ((work_completion)(&ndev->rx_work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #2: ffff888068cd4100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline] #2: ffff888068cd4100 (&dev->mutex){....}-{3:3}, at: nfc_targets_found+0x26f/0x590 net/nfc/core.c:778 3 locks held by kworker/1:2/27027: #0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline] #0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #1: ffffc90015eafd20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline] #1: ffffc90015eafd20 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #2: ffffffff8e7e7c08 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa7/0x2f0 net/nfc/netlink.c:1843 2 locks held by syz-executor.4/29165: #0: ffffffff8e535170 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1074 #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x121/0xe50 net/netlink/genetlink.c:1065 1 lock held by syz-executor.3/29150: #0: ffff888068cd2350 (&ndev->req_lock){+.+.}-{3:3}, at: nci_close_device+0x10a/0x600 net/nfc/nci/core.c:561 5 locks held by syz-executor.3/29169: #0: ffffffff8e535170 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1074 #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x121/0xe50 net/netlink/genetlink.c:1065 #2: ffff888068cd4508 (&genl_data->genl_data_mutex){+.+.}-{3:3}, at: nfc_genl_start_poll+0x1de/0x350 net/nfc/netlink.c:826 #3: ffff888068cd4100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline] #3: ffff888068cd4100 (&dev->mutex){....}-{3:3}, at: nfc_start_poll+0x5a/0x300 net/nfc/core.c:208 #4: ffff888068cd2350 (&ndev->req_lock){+.+.}-{3:3}, at: nci_request net/nfc/nci/core.c:149 [inline] #4: ffff888068cd2350 (&ndev->req_lock){+.+.}-{3:3}, at: nci_set_local_general_bytes net/nfc/nci/core.c:775 [inline] #4: ffff888068cd2350 (&ndev->req_lock){+.+.}-{3:3}, at: nci_start_poll+0x5a3/0xf30 net/nfc/nci/core.c:839 2 locks held by syz-executor.5/29157: #0: ffffffff8e535170 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1074 #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x121/0xe50 net/netlink/genetlink.c:1065 2 locks held by syz-executor.5/29164: #0: ffffffff8e535170 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1074 #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x121/0xe50 net/netlink/genetlink.c:1065 1 lock held by syz-executor.5/29181: #0: ffffffff8e7e7c08 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_unregister_device+0x175/0x2a0 net/nfc/core.c:1181 2 locks held by syz-executor.5/29189: #0: ffffffff8e535170 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1074 #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x121/0xe50 net/netlink/genetlink.c:1065 2 locks held by syz-executor.2/29173: #0: ffffffff8e535170 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1074 #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x121/0xe50 net/netlink/genetlink.c:1065 2 locks held by syz-executor.2/29178: #0: ffffffff8e535170 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1074 #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x121/0xe50 net/netlink/genetlink.c:1065 1 lock held by syz-executor.2/29186: #0: ffffffff8e7e7c08 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_unregister_device+0x175/0x2a0 net/nfc/core.c:1181 2 locks held by syz-executor.0/29185: #0: ffffffff8da7bd68 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5c/0x380 drivers/char/misc.c:129 #1: ffffffff8e7e7c08 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_register_device+0x3c/0x320 net/nfc/core.c:1116 2 locks held by syz-executor.0/29191: #0: ffffffff8e535170 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1074 #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x121/0xe50 net/netlink/genetlink.c:1065 2 locks held by syz-executor.0/29196: #0: ffffffff8e535170 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1074 #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x121/0xe50 net/netlink/genetlink.c:1065 1 lock held by syz-executor.1/29211: #0: ffffffff8da7bd68 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5c/0x380 drivers/char/misc.c:129 2 locks held by syz-executor.1/29212: #0: ffffffff8e535170 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1074 #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x121/0xe50 net/netlink/genetlink.c:1065 2 locks held by syz-executor.1/29213: #0: ffffffff8e535170 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1074 #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8e535028 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x121/0xe50 net/netlink/genetlink.c:1065 1 lock held by syz-executor.4/29218: #0: ffffffff8da7bd68 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5c/0x380 drivers/char/misc.c:129 1 lock held by syz-executor.5/29222: #0: ffffffff8da7bd68 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5c/0x380 drivers/char/misc.c:129 1 lock held by syz-executor.3/29223: #0: ffffffff8da7bd68 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5c/0x380 drivers/char/misc.c:129 1 lock held by syz-executor.2/29225: #0: ffffffff8da7bd68 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5c/0x380 drivers/char/misc.c:129 1 lock held by syz-executor.0/29226: #0: ffffffff8da7bd68 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5c/0x380 drivers/char/misc.c:129 1 lock held by syz-executor.1/29228: #0: ffffffff8da7bd68 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5c/0x380 drivers/char/misc.c:129 1 lock held by syz-executor.4/29233: #0: ffffffff8da7bd68 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5c/0x380 drivers/char/misc.c:129 1 lock held by syz-executor.3/29237: #0: ffffffff8da7bd68 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5c/0x380 drivers/char/misc.c:129 1 lock held by syz-executor.5/29238: #0: ffffffff8da7bd68 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5c/0x380 drivers/char/misc.c:129 1 lock held by syz-executor.2/29239: #0: ffffffff8da7bd68 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5c/0x380 drivers/char/misc.c:129 1 lock held by syz-executor.0/29241: #0: ffffffff8da7bd68 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5c/0x380 drivers/char/misc.c:129 1 lock held by syz-executor.1/29245: #0: ffffffff8da7bd68 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5c/0x380 drivers/char/misc.c:129 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc4-syzkaller-00284-gb9ddbb0cde2a #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+0x1e7/0x2d0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x310 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+0xfa9/0xff0 kernel/hung_task.c:379 kthread+0x2d3/0x370 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 139 Comm: kworker/u4:6 Not tainted 6.6.0-rc4-syzkaller-00284-gb9ddbb0cde2a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 Workqueue: bat_events batadv_nc_worker RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] RIP: 0010:hlock_class kernel/locking/lockdep.c:228 [inline] RIP: 0010:check_wait_context kernel/locking/lockdep.c:4797 [inline] RIP: 0010:__lock_acquire+0x892/0x7f70 kernel/locking/lockdep.c:5086 Code: fd 31 0f 83 55 02 00 00 48 89 5c 24 60 4c 89 f0 48 c1 e8 03 42 0f b6 04 00 84 c0 0f 85 7d 01 00 00 41 8b 1f 81 e3 ff 1f 00 00 <48> 89 d8 48 c1 e8 06 48 8d 3c c5 80 73 6f 90 be 08 00 00 00 e8 a5 RSP: 0018:ffffc90002e3f720 EFLAGS: 00000002 RAX: 0000000000000000 RBX: 00000000000006e6 RCX: ffffffff816cff5b RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff906f7458 RBP: ffffc90002e3f9e8 R08: dffffc0000000000 R09: 1ffffffff20dee8b R10: dffffc0000000000 R11: fffffbfff20dee8c R12: ffff888016752880 R13: 0000000000000001 R14: ffff8880167528d0 R15: ffff8880167528d0 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c0005bd000 CR3: 000000000d130000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5753 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+0xec/0x610 net/batman-adv/network-coding.c:719 process_one_work kernel/workqueue.c:2630 [inline] process_scheduled_works+0x90f/0x1400 kernel/workqueue.c:2703 worker_thread+0xa5f/0xff0 kernel/workqueue.c:2784 kthread+0x2d3/0x370 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304