INFO: task kworker/u4:5:2791 blocked for more than 143 seconds. Not tainted 6.5.0-rc4-syzkaller-00174-gc1a515d3c027 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:5 state:D stack:20760 pid:2791 ppid:2 flags:0x00004000 Workqueue: nfc2_nci_rx_wq nci_rx_work Call Trace: context_switch kernel/sched/core.c:5381 [inline] __schedule+0x1873/0x48f0 kernel/sched/core.c:6710 schedule+0xc3/0x180 kernel/sched/core.c:6786 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6845 __mutex_lock_common+0xe33/0x2530 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799 device_lock include/linux/device.h:958 [inline] nfc_targets_found+0x26f/0x590 net/nfc/core.c:778 nci_ntf_packet+0x442c/0x4f40 nci_rx_work+0x14c/0x2b0 net/nfc/nci/core.c:1517 process_one_work+0x92c/0x12c0 kernel/workqueue.c:2597 worker_thread+0xa63/0x1210 kernel/workqueue.c:2748 kthread+0x2b8/0x350 kernel/kthread.c:389 ret_from_fork+0x2e/0x60 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 INFO: task kworker/0:4:16212 blocked for more than 143 seconds. Not tainted 6.5.0-rc4-syzkaller-00174-gc1a515d3c027 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:4 state:D stack:26440 pid:16212 ppid:2 flags:0x00004000 Workqueue: events nfc_urelease_event_work Call Trace: context_switch kernel/sched/core.c:5381 [inline] __schedule+0x1873/0x48f0 kernel/sched/core.c:6710 schedule+0xc3/0x180 kernel/sched/core.c:6786 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6845 __mutex_lock_common+0xe33/0x2530 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799 nci_request net/nfc/nci/core.c:149 [inline] nci_stop_poll+0x123/0x480 net/nfc/nci/core.c:873 nfc_stop_poll+0xea/0x220 net/nfc/core.c:259 nfc_urelease_event_work+0x160/0x2f0 net/nfc/netlink.c:1852 process_one_work+0x92c/0x12c0 kernel/workqueue.c:2597 worker_thread+0xa63/0x1210 kernel/workqueue.c:2748 kthread+0x2b8/0x350 kernel/kthread.c:389 ret_from_fork+0x2e/0x60 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 INFO: task syz-executor.5:17112 blocked for more than 143 seconds. Not tainted 6.5.0-rc4-syzkaller-00174-gc1a515d3c027 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:25832 pid:17112 ppid:5052 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5381 [inline] __schedule+0x1873/0x48f0 kernel/sched/core.c:6710 schedule+0xc3/0x180 kernel/sched/core.c:6786 schedule_timeout+0xb0/0x310 kernel/time/timer.c:2143 do_wait_for_common+0x449/0x5f0 kernel/sched/completion.c:85 __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x4a/0x60 kernel/sched/completion.c:138 __flush_workqueue+0x743/0x1620 kernel/workqueue.c:3174 nci_close_device+0x189/0x600 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+0x3f8/0x950 fs/file_table.c:384 task_work_run+0x24a/0x300 kernel/task_work.c:179 get_signal+0x160e/0x17e0 kernel/signal.c:2657 arch_do_signal_or_restart+0x91/0x670 arch/x86/kernel/signal.c:308 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f9cc547cae9 RSP: 002b:00007f9cc61040c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: fffffffffffffff2 RBX: 00007f9cc559bf80 RCX: 00007f9cc547cae9 RDX: 0000000000000064 RSI: 0000000020000840 RDI: 0000000000000003 RBP: 00007f9cc54c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f9cc559bf80 R15: 00007fff45d79e28 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/13: #0: ffffffff8d328db0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:522 1 lock held by rcu_tasks_trace/14: #0: ffffffff8d329170 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:522 3 locks held by kworker/1:0/22: #0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7e3/0x12c0 kernel/workqueue.c:2569 #1: ffffc900001c7d00 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x82b/0x12c0 kernel/workqueue.c:2571 #2: ffffffff8e7ccc88 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa7/0x2f0 net/nfc/netlink.c:1843 1 lock held by khungtaskd/28: #0: ffffffff8d328be0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 3 locks held by kworker/u4:5/2791: #0: ffff88802ec51138 ((wq_completion)nfc2_nci_rx_wq){+.+.}-{0:0}, at: process_one_work+0x7e3/0x12c0 kernel/workqueue.c:2569 #1: ffffc9000c09fd00 ((work_completion)(&ndev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x82b/0x12c0 kernel/workqueue.c:2571 #2: ffff8880603c2100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:958 [inline] #2: ffff8880603c2100 (&dev->mutex){....}-{3:3}, at: nfc_targets_found+0x26f/0x590 net/nfc/core.c:778 2 locks held by getty/4775: #0: ffff88802d572098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b1/0x1dc0 drivers/tty/n_tty.c:2187 3 locks held by kworker/1:5/5116: #0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7e3/0x12c0 kernel/workqueue.c:2569 #1: ffffc90005297d00 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x82b/0x12c0 kernel/workqueue.c:2571 #2: ffffffff8e7ccc88 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa7/0x2f0 net/nfc/netlink.c:1843 3 locks held by kworker/1:7/5118: #0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7e3/0x12c0 kernel/workqueue.c:2569 #1: ffffc900052b7d00 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x82b/0x12c0 kernel/workqueue.c:2571 #2: ffffffff8e7ccc88 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa7/0x2f0 net/nfc/netlink.c:1843 5 locks held by kworker/u4:7/5232: #0: ffff8880b993bf98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:558 #1: ffff8880b99287c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:999 #2: ffff8880b99295d8 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x120/0x260 kernel/time/timer.c:999 #3: ffffffff922b52c0 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x163/0x530 lib/debugobjects.c:717 #4: ffffffff8d1da0a8 (text_mutex){+.+.}-{3:3}, at: arch_jump_label_transform_apply+0x12/0x30 arch/x86/kernel/jump_label.c:145 2 locks held by kworker/1:15/6556: #0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7e3/0x12c0 kernel/workqueue.c:2569 #1: ffffc9000554fd00 ((work_completion)(&dev->recv_work)){+.+.}-{0:0}, at: process_one_work+0x82b/0x12c0 kernel/workqueue.c:2571 6 locks held by kworker/0:4/16212: #0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7e3/0x12c0 kernel/workqueue.c:2569 #1: ffffc9000338fd00 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x82b/0x12c0 kernel/workqueue.c:2571 #2: ffffffff8e7ccc88 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa7/0x2f0 net/nfc/netlink.c:1843 #3: ffff8880603c2508 (&genl_data->genl_data_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0x111/0x2f0 net/nfc/netlink.c:1849 #4: ffff8880603c2100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:958 [inline] #4: ffff8880603c2100 (&dev->mutex){....}-{3:3}, at: nfc_stop_poll+0x3c/0x220 net/nfc/core.c:247 #5: ffff8880603c3350 (&ndev->req_lock){+.+.}-{3:3}, at: nci_request net/nfc/nci/core.c:149 [inline] #5: ffff8880603c3350 (&ndev->req_lock){+.+.}-{3:3}, at: nci_stop_poll+0x123/0x480 net/nfc/nci/core.c:873 3 locks held by kworker/0:10/16252: #0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7e3/0x12c0 kernel/workqueue.c:2569 #1: ffffc9000382fd00 ((work_completion)(&w->w)){+.+.}-{0:0}, at: process_one_work+0x82b/0x12c0 kernel/workqueue.c:2571 #2: ffffffff8e7ccc88 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_urelease_event_work+0xa7/0x2f0 net/nfc/netlink.c:1843 1 lock held by syz-executor.5/17112: #0: ffff8880603c3350 (&ndev->req_lock){+.+.}-{3:3}, at: nci_close_device+0x10a/0x600 net/nfc/nci/core.c:561 2 locks held by syz-executor.5/17244: #0: ffffffff8da6f9e8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5c/0x380 drivers/char/misc.c:129 #1: ffffffff8e7ccc88 (nfc_devlist_mutex){+.+.}-{3:3}, at: nfc_register_device+0x3c/0x320 net/nfc/core.c:1116 1 lock held by syz-executor.5/17276: #0: ffffffff8da6f9e8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5c/0x380 drivers/char/misc.c:129 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.5.0-rc4-syzkaller-00174-gc1a515d3c027 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 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+0x187/0x300 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+0xec2/0xf00 kernel/hung_task.c:379 kthread+0x2b8/0x350 kernel/kthread.c:389 ret_from_fork+0x2e/0x60 arch/x86/kernel/process.c:145 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: 6966 Comm: kworker/u4:11 Not tainted 6.5.0-rc4-syzkaller-00174-gc1a515d3c027 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 Workqueue: 0x0 (events_unbound) RIP: 0010:kasan_check_range+0xc/0x290 mm/kasan/generic.c:186 Code: dd d8 08 31 c0 c3 0f 0b b8 ea ff ff ff c3 0f 0b b8 ea ff ff ff c3 0f 1f 84 00 00 00 00 00 66 0f 1f 00 55 41 57 41 56 41 54 53 01 48 85 f6 0f 84 a0 01 00 00 4c 8d 04 37 49 39 f8 0f 82 52 02 RSP: 0018:ffffc9000edc6d50 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000000039 RCX: ffffffff816b1389 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff907b1300 RBP: ffffc9000edc7048 R08: dffffc0000000000 R09: 1ffffffff20f6262 R10: dffffc0000000000 R11: fffffbfff20f6263 R12: 00000000f6b213ea R13: ffff88807aa50ac0 R14: 00000000f736dd47 R15: ffff88807aa50b38 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c0058fb000 CR3: 000000000d130000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] hlock_class kernel/locking/lockdep.c:228 [inline] __lock_acquire+0x1089/0x7f70 kernel/locking/lockdep.c:5140 lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5761 do_write_seqcount_begin_nested include/linux/seqlock.h:516 [inline] do_write_seqcount_begin include/linux/seqlock.h:541 [inline] psi_account_irqtime+0x1a9/0x5e0 kernel/sched/psi.c:1024 update_rq_clock_task kernel/sched/core.c:725 [inline] update_rq_clock+0x22b/0x890 kernel/sched/core.c:769 load_balance+0x490f/0x8170 kernel/sched/fair.c:10871 newidle_balance+0x660/0xff0 kernel/sched/fair.c:11891 pick_next_task_fair+0x289/0xdc0 kernel/sched/fair.c:8182 __pick_next_task kernel/sched/core.c:6013 [inline] pick_next_task kernel/sched/core.c:6088 [inline] __schedule+0x7c6/0x48f0 kernel/sched/core.c:6674 schedule+0xc3/0x180 kernel/sched/core.c:6786 worker_thread+0xec1/0x1210 kernel/workqueue.c:2769 kthread+0x2b8/0x350 kernel/kthread.c:389 ret_from_fork+0x2e/0x60 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304