INFO: task kworker/u5:4:5367 blocked for more than 143 seconds. Not tainted 5.19.0-rc5-syzkaller-00049-gc1084b6c5620 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u5:4 state:D stack:24944 pid: 5367 ppid: 2 flags:0x00004000 Workqueue: hci7 hci_power_on Call Trace: context_switch kernel/sched/core.c:5146 [inline] __schedule+0x957/0xe20 kernel/sched/core.c:6458 schedule+0xeb/0x1b0 kernel/sched/core.c:6530 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6589 __mutex_lock_common+0xecf/0x26c0 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799 hci_dev_do_open net/bluetooth/hci_core.c:480 [inline] hci_power_on+0x178/0x650 net/bluetooth/hci_core.c:963 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 INFO: task syz-executor.0:12016 blocked for more than 143 seconds. Not tainted 5.19.0-rc5-syzkaller-00049-gc1084b6c5620 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:27040 pid:12016 ppid: 7207 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5146 [inline] __schedule+0x957/0xe20 kernel/sched/core.c:6458 schedule+0xeb/0x1b0 kernel/sched/core.c:6530 schedule_timeout+0xac/0x300 kernel/time/timer.c:1911 do_wait_for_common+0x3ea/0x560 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+0x46/0x60 kernel/sched/completion.c:138 __flush_work kernel/workqueue.c:3075 [inline] __cancel_work_timer+0x585/0x740 kernel/workqueue.c:3162 hci_dev_close_sync+0x31/0xcc0 net/bluetooth/hci_sync.c:4091 hci_dev_do_close net/bluetooth/hci_core.c:553 [inline] hci_unregister_dev+0x1b1/0x460 net/bluetooth/hci_core.c:2685 hci_uart_tty_close+0x1a7/0x280 drivers/bluetooth/hci_ldisc.c:548 tty_ldisc_kill drivers/tty/tty_ldisc.c:608 [inline] tty_ldisc_release+0x23c/0x510 drivers/tty/tty_ldisc.c:776 tty_release_struct+0x27/0xd0 drivers/tty/tty_io.c:1694 tty_release+0xc06/0xe60 drivers/tty/tty_io.c:1865 __fput+0x3b9/0x820 fs/file_table.c:317 task_work_run+0x146/0x1c0 kernel/task_work.c:177 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x134/0x160 kernel/entry/common.c:169 exit_to_user_mode_prepare+0xad/0x110 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x2e/0x60 kernel/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f9a5263bd4b RSP: 002b:00007ffe226729e0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f9a5263bd4b RDX: 00007f9a527a01c0 RSI: ffffffffffffffff RDI: 0000000000000003 RBP: 00007f9a5279d960 R08: 0000000000000000 R09: 00007f9a527a01c8 R10: 00007ffe22672ae0 R11: 0000000000000293 R12: 00000000002e1d0c R13: 00007ffe22672ae0 R14: 00007f9a5279bf60 R15: 0000000000000032 Showing all locks held in the system: 1 lock held by khungtaskd/28: #0: ffffffff8cb1e820 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 1 lock held by klogd/2966: #0: ffff8880b9b39b58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x110 kernel/sched/core.c:544 2 locks held by getty/3291: #0: ffff88814a435098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244 #1: ffffc90002d232e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6e8/0x1e50 drivers/tty/n_tty.c:2124 2 locks held by kworker/u4:18/15276: #0: ffff8880b9b39b58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x110 kernel/sched/core.c:544 #1: ffff8880b9b27748 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x4fa/0x820 kernel/sched/psi.c:880 3 locks held by kworker/u5:4/5367: #0: ffff88804071a138 ((wq_completion)hci7){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262 #1: ffffc9000338fd00 ((work_completion)(&hdev->power_on)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264 #2: ffff888031c6d048 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_open net/bluetooth/hci_core.c:480 [inline] #2: ffff888031c6d048 (&hdev->req_lock){+.+.}-{3:3}, at: hci_power_on+0x178/0x650 net/bluetooth/hci_core.c:963 3 locks held by syz-executor.0/12016: #0: ffff888028813098 (&tty->ldisc_sem){++++}-{0:0}, at: __tty_ldisc_lock drivers/tty/tty_ldisc.c:290 [inline] #0: ffff888028813098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_lock_pair_timeout drivers/tty/tty_ldisc.c:336 [inline] #0: ffff888028813098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_lock_pair drivers/tty/tty_ldisc.c:367 [inline] #0: ffff888028813098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_release+0x5b/0x510 drivers/tty/tty_ldisc.c:775 #1: ffff888028816098 (&tty->ldisc_sem/1){+.+.}-{0:0}, at: __tty_ldisc_lock_nested drivers/tty/tty_ldisc.c:296 [inline] #1: ffff888028816098 (&tty->ldisc_sem/1){+.+.}-{0:0}, at: tty_ldisc_lock_pair_timeout drivers/tty/tty_ldisc.c:338 [inline] #1: ffff888028816098 (&tty->ldisc_sem/1){+.+.}-{0:0}, at: tty_ldisc_lock_pair drivers/tty/tty_ldisc.c:367 [inline] #1: ffff888028816098 (&tty->ldisc_sem/1){+.+.}-{0:0}, at: tty_ldisc_release+0x7f/0x510 drivers/tty/tty_ldisc.c:775 #2: ffff888031c6d048 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:551 [inline] #2: ffff888031c6d048 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x1a9/0x460 net/bluetooth/hci_core.c:2685 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 28 Comm: khungtaskd Not tainted 5.19.0-rc5-syzkaller-00049-gc1084b6c5620 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 nmi_cpu_backtrace+0x473/0x4a0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x168/0x280 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0xcf9/0xd40 kernel/hung_task.c:369 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 15276 Comm: kworker/u4:18 Not tainted 5.19.0-rc5-syzkaller-00049-gc1084b6c5620 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 Workqueue: bat_events batadv_nc_worker RIP: 0010:trace_lock_release+0x60/0x190 include/trace/events/lock.h:69 Code: 48 0f a3 05 ea a8 9b 0c 73 47 65 ff 05 81 83 9a 7e 48 c7 c0 40 46 f0 8d 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 <74> 0c 48 c7 c7 40 46 f0 8d e8 e2 7c 72 00 48 8b 05 8b 5a 88 0c e8 RSP: 0018:ffffc900037afa70 EFLAGS: 00000246 RAX: 1ffffffff1be08c8 RBX: 0000000000000001 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8e039468 RBP: ffffc900037afbc8 R08: dffffc0000000000 R09: fffffbfff1c0728e R10: fffffbfff1c0728e R11: 1ffffffff1c0728d R12: dffffc0000000000 R13: ffffffff8a06d2e5 R14: ffff88807d6984d0 R15: 1ffff920006f5f60 FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c000780f88 CR3: 00000000220c6000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_release+0x81/0x870 kernel/locking/lockdep.c:5676 rcu_read_unlock include/linux/rcupdate.h:728 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline] batadv_nc_worker+0x251/0x5b0 net/batman-adv/network-coding.c:719 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 ---------------- Code disassembly (best guess): 0: 48 0f a3 05 ea a8 9b bt %rax,0xc9ba8ea(%rip) # 0xc9ba8f2 7: 0c 8: 73 47 jae 0x51 a: 65 ff 05 81 83 9a 7e incl %gs:0x7e9a8381(%rip) # 0x7e9a8392 11: 48 c7 c0 40 46 f0 8d mov $0xffffffff8df04640,%rax 18: 48 c1 e8 03 shr $0x3,%rax 1c: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 23: fc ff df 26: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) * 2a: 74 0c je 0x38 <-- trapping instruction 2c: 48 c7 c7 40 46 f0 8d mov $0xffffffff8df04640,%rdi 33: e8 e2 7c 72 00 callq 0x727d1a 38: 48 8b 05 8b 5a 88 0c mov 0xc885a8b(%rip),%rax # 0xc885aca 3f: e8 .byte 0xe8