INFO: task kworker/u5:0:9959 blocked for more than 143 seconds. Not tainted 5.19.0-rc4-syzkaller-00208-g69cb6c6556ad #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u5:0 state:D stack:28120 pid: 9959 ppid: 2 flags:0x00004000 Workqueue: hci6 hci_power_on Call Trace: context_switch kernel/sched/core.c:5146 [inline] __schedule+0xa00/0x4b50 kernel/sched/core.c:6458 schedule+0xd2/0x1f0 kernel/sched/core.c:6530 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6589 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa70/0x1350 kernel/locking/mutex.c:747 hci_dev_do_open+0x2a/0x70 net/bluetooth/hci_core.c:480 hci_power_on+0x133/0x630 net/bluetooth/hci_core.c:963 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 INFO: task syz-executor.0:17755 blocked for more than 143 seconds. Not tainted 5.19.0-rc4-syzkaller-00208-g69cb6c6556ad #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:28520 pid:17755 ppid: 3638 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5146 [inline] __schedule+0xa00/0x4b50 kernel/sched/core.c:6458 schedule+0xd2/0x1f0 kernel/sched/core.c:6530 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common+0x378/0x530 kernel/sched/completion.c:106 __flush_work+0x56c/0xb10 kernel/workqueue.c:3075 __cancel_work_timer+0x3f9/0x570 kernel/workqueue.c:3162 hci_dev_close_sync+0x8d/0x1150 net/bluetooth/hci_sync.c:4091 hci_dev_do_close+0x32/0x70 net/bluetooth/hci_core.c:553 hci_unregister_dev+0x1c4/0x550 net/bluetooth/hci_core.c:2685 hci_uart_tty_close+0x241/0x2a0 drivers/bluetooth/hci_ldisc.c:548 tty_ldisc_close+0x110/0x190 drivers/tty/tty_ldisc.c:456 tty_ldisc_kill+0x94/0x150 drivers/tty/tty_ldisc.c:608 tty_ldisc_release+0xe1/0x2a0 drivers/tty/tty_ldisc.c:776 tty_release_struct+0x20/0xe0 drivers/tty/tty_io.c:1694 tty_release+0xc70/0x1200 drivers/tty/tty_io.c:1865 __fput+0x277/0x9d0 fs/file_table.c:317 task_work_run+0xdd/0x1a0 kernel/task_work.c:177 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:169 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f1e4503bd4b RSP: 002b:00007ffdef8a8bd0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f1e4503bd4b RDX: 00007f1e451a01c0 RSI: ffffffffffffffff RDI: 0000000000000003 RBP: 00007f1e4519d960 R08: 0000000000000000 R09: 00007f1e451a01c8 R10: 00007ffdef8a8cd0 R11: 0000000000000293 R12: 00000000002fd78e R13: 00007ffdef8a8cd0 R14: 00007f1e4519bf60 R15: 0000000000000032 Showing all locks held in the system: 1 lock held by khungtaskd/28: #0: ffffffff8bd83b60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6491 2 locks held by getty/3287: #0: ffff88814b1fc098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244 #1: ffffc90001c282e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xe50/0x13c0 drivers/tty/n_tty.c:2124 3 locks held by kworker/u5:0/9959: #0: ffff8880789d9938 ((wq_completion)hci6){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880789d9938 ((wq_completion)hci6){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff8880789d9938 ((wq_completion)hci6){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff8880789d9938 ((wq_completion)hci6){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff8880789d9938 ((wq_completion)hci6){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff8880789d9938 ((wq_completion)hci6){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260 #1: ffffc9000404fda8 ((work_completion)(&hdev->power_on)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264 #2: ffff88802640d048 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_open+0x2a/0x70 net/bluetooth/hci_core.c:480 5 locks held by kworker/u4:0/30483: 2 locks held by kworker/u4:1/30491: 3 locks held by syz-executor.0/17755: #0: ffff888034f50098 (&tty->ldisc_sem){++++}-{0:0}, at: __tty_ldisc_lock drivers/tty/tty_ldisc.c:290 [inline] #0: ffff888034f50098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_lock_pair_timeout drivers/tty/tty_ldisc.c:346 [inline] #0: ffff888034f50098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_lock_pair drivers/tty/tty_ldisc.c:367 [inline] #0: ffff888034f50098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_release+0x127/0x2a0 drivers/tty/tty_ldisc.c:775 #1: ffff888075b72098 (&tty->ldisc_sem/1){+.+.}-{0:0}, at: __tty_ldisc_lock_nested drivers/tty/tty_ldisc.c:296 [inline] #1: ffff888075b72098 (&tty->ldisc_sem/1){+.+.}-{0:0}, at: tty_ldisc_lock_pair_timeout drivers/tty/tty_ldisc.c:348 [inline] #1: ffff888075b72098 (&tty->ldisc_sem/1){+.+.}-{0:0}, at: tty_ldisc_lock_pair drivers/tty/tty_ldisc.c:367 [inline] #1: ffff888075b72098 (&tty->ldisc_sem/1){+.+.}-{0:0}, at: tty_ldisc_release+0x1bd/0x2a0 drivers/tty/tty_ldisc.c:775 #2: ffff88802640d048 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0x2a/0x70 net/bluetooth/hci_core.c:551 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 28 Comm: khungtaskd Not tainted 5.19.0-rc4-syzkaller-00208-g69cb6c6556ad #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+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x1e6/0x230 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+0xc1d/0xf50 kernel/hung_task.c:369 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 30491 Comm: kworker/u4:1 Not tainted 5.19.0-rc4-syzkaller-00208-g69cb6c6556ad #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet RIP: 0010:lookup_object lib/debugobjects.c:195 [inline] RIP: 0010:debug_object_deactivate lib/debugobjects.c:734 [inline] RIP: 0010:debug_object_deactivate+0x145/0x300 lib/debugobjects.c:720 Code: 8b ab c0 41 0e 91 31 db 48 85 ed 74 44 49 bc 00 00 00 00 00 fc ff df 48 8d 7d 18 83 c3 01 48 89 f8 48 c1 e8 03 42 80 3c 20 00 <0f> 85 1e 01 00 00 4c 3b 7d 18 74 74 48 89 e8 48 c1 e8 03 42 80 3c RSP: 0018:ffffc900003f8d30 EFLAGS: 00000046 RAX: 1ffff11003dcb91b RBX: 0000000000000001 RCX: ffffffff815dfae0 RDX: 1ffffffff22201e3 RSI: 0000000000000002 RDI: ffff88801ee5c8d8 RBP: ffff88801ee5c8c0 R08: ffffffff91100f08 R09: 0000000000000003 R10: fffff5200007f194 R11: 0000000000000001 R12: dffffc0000000000 R13: ffffffff89ceb360 R14: 1ffff9200007f1a8 R15: ffff888034f9d720 FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c001155188 CR3: 0000000026beb000 CR4: 00000000003506e0 Call Trace: debug_timer_deactivate kernel/time/timer.c:787 [inline] debug_deactivate kernel/time/timer.c:831 [inline] detach_timer kernel/time/timer.c:878 [inline] expire_timers kernel/time/timer.c:1508 [inline] __run_timers.part.0+0x517/0xa80 kernel/time/timer.c:1790 __run_timers kernel/time/timer.c:1768 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1803 __do_softirq+0x29b/0x9c2 kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650 irq_exit_rcu+0x5/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:649 RIP: 0010:lock_acquire+0x1ef/0x570 kernel/locking/lockdep.c:5633 Code: f2 a4 7e 83 f8 01 0f 85 e8 02 00 00 9c 58 f6 c4 02 0f 85 fb 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24 RSP: 0018:ffffc90003c6faa0 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: 1ffff9200078df56 RCX: 24818582123658be RDX: 1ffff11005a61953 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff9067b907 R10: fffffbfff20cf720 R11: 0000000000000001 R12: 0000000000000002 R13: 0000000000000000 R14: ffffffff8bd83b60 R15: 0000000000000000 rcu_lock_acquire include/linux/rcupdate.h:269 [inline] rcu_read_lock include/linux/rcupdate.h:695 [inline] batadv_iv_ogm_slide_own_bcast_window net/batman-adv/bat_iv_ogm.c:755 [inline] batadv_iv_ogm_schedule_buff+0x5d2/0x1430 net/batman-adv/bat_iv_ogm.c:826 batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:869 [inline] batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:862 [inline] batadv_iv_send_outstanding_bat_ogm_packet+0x740/0x910 net/batman-adv/bat_iv_ogm.c:1713 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 ---------------- Code disassembly (best guess): 0: 8b ab c0 41 0e 91 mov -0x6ef1be40(%rbx),%ebp 6: 31 db xor %ebx,%ebx 8: 48 85 ed test %rbp,%rbp b: 74 44 je 0x51 d: 49 bc 00 00 00 00 00 movabs $0xdffffc0000000000,%r12 14: fc ff df 17: 48 8d 7d 18 lea 0x18(%rbp),%rdi 1b: 83 c3 01 add $0x1,%ebx 1e: 48 89 f8 mov %rdi,%rax 21: 48 c1 e8 03 shr $0x3,%rax 25: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) * 2a: 0f 85 1e 01 00 00 jne 0x14e <-- trapping instruction 30: 4c 3b 7d 18 cmp 0x18(%rbp),%r15 34: 74 74 je 0xaa 36: 48 89 e8 mov %rbp,%rax 39: 48 c1 e8 03 shr $0x3,%rax 3d: 42 rex.X 3e: 80 .byte 0x80 3f: 3c .byte 0x3c