[ 57.510215][ C0] clocksource: Watchdog remote CPU 1 read timed out [ 57.510272][ C0] [ 57.510274][ C0] ======================================================== [ 57.510274][ C0] WARNING: possible irq lock inversion dependency detected [ 57.510277][ C0] 7.2.0-virtme #1 Tainted: G W [ 57.510278][ C0] -------------------------------------------------------- [ 57.510279][ C0] perl/189 just changed the state of lock: [ 57.510280][ C0] ffffffffa7a9d760 (console_owner){..-.}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 57.510293][ C0] but this lock took another, SOFTIRQ-unsafe lock in the past: [ 57.510294][ C0] (fs_reclaim){+.+.}-{0:0} [ 57.510296][ C0] [ 57.510296][ C0] [ 57.510296][ C0] and interrupts could create inverse lock ordering between them. [ 57.510296][ C0] [ 57.510297][ C0] [ 57.510297][ C0] other info that might help us debug this: [ 57.510298][ C0] Possible interrupt unsafe locking scenario: [ 57.510298][ C0] [ 57.510298][ C0] CPU0 CPU1 [ 57.510299][ C0] ---- ---- [ 57.510299][ C0] lock(fs_reclaim); [ 57.510300][ C0] local_irq_disable(); [ 57.510301][ C0] lock(console_owner); [ 57.510301][ C0] lock(fs_reclaim); [ 57.510302][ C0] [ 57.510303][ C0] lock(console_owner); [ 57.510303][ C0] [ 57.510303][ C0] *** DEADLOCK *** [ 57.510303][ C0] [ 57.510304][ C0] locks held by perl/189: 8, last CPU#0: [ 57.510305][ C0] #0: ff110000103ae8a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x28/0x80 [ 57.510311][ C0] #1: ff110000103ae928 (&tty->atomic_write_lock){+.+.}-{4:4}, at: iterate_tty_write+0x9f/0x590 [ 57.510315][ C0] #2: ff110000103aeac8 (&tty->termios_rwsem){++++}-{4:4}, at: n_tty_write+0x1ad/0x8f0 [ 57.510319][ C0] #3: ffa000000006b370 (&ldata->output_lock){+.+.}-{4:4}, at: process_output_block+0x59/0x6d0 [ 57.510322][ C0] #4: ffa0000000007c90 ((&watchdog_timer)){+.-.}-{0:0}, at: call_timer_fn+0x110/0x4d0 [ 57.510327][ C0] #5: ffffffffa7be29f8 (watchdog_lock){+.-.}-{3:3}, at: clocksource_watchdog+0x15/0x30 [ 57.510331][ C0] #6: ffffffffa7b7ddc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 57.510334][ C0] #7: ffffffffa7b7de38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 57.510337][ C0] [ 57.510337][ C0] the shortest dependencies between 2nd lock and 1st lock: [ 57.510342][ C0] -> (fs_reclaim){+.+.}-{0:0} { [ 57.510344][ C0] HARDIRQ-ON-W at: [ 57.510346][ C0] __lock_acquire+0x388/0xc20 [ 57.510349][ C0] lock_acquire.part.0+0xd4/0x280 [ 57.510350][ C0] fs_reclaim_acquire+0xd5/0x120 [ 57.510354][ C0] __kmalloc_cache_noprof+0x6e/0x620 [ 57.510355][ C0] kthread_create_worker_on_node+0xea/0x210 [ 57.510358][ C0] workqueue_init+0x2a/0x680 [ 57.510362][ C0] kernel_init_freeable+0x2fe/0x630 [ 57.510365][ C0] kernel_init+0x21/0x150 [ 57.510369][ C0] ret_from_fork+0x474/0x6b0 [ 57.510372][ C0] ret_from_fork_asm+0x11/0x20 [ 57.510375][ C0] SOFTIRQ-ON-W at: [ 57.510376][ C0] __lock_acquire+0x388/0xc20 [ 57.510377][ C0] lock_acquire.part.0+0xd4/0x280 [ 57.510379][ C0] fs_reclaim_acquire+0xd5/0x120 [ 57.510380][ C0] __kmalloc_cache_noprof+0x6e/0x620 [ 57.510381][ C0] kthread_create_worker_on_node+0xea/0x210 [ 57.510383][ C0] workqueue_init+0x2a/0x680 [ 57.510384][ C0] kernel_init_freeable+0x2fe/0x630 [ 57.510386][ C0] kernel_init+0x21/0x150 [ 57.510387][ C0] ret_from_fork+0x474/0x6b0 [ 57.510388][ C0] ret_from_fork_asm+0x11/0x20 [ 57.510389][ C0] INITIAL USE at: [ 57.510390][ C0] __lock_acquire+0x388/0xc20 [ 57.510392][ C0] lock_acquire.part.0+0xd4/0x280 [ 57.510393][ C0] fs_reclaim_acquire+0xd5/0x120 [ 57.510395][ C0] __kmalloc_cache_noprof+0x6e/0x620 [ 57.510396][ C0] kthread_create_worker_on_node+0xea/0x210 [ 57.510397][ C0] workqueue_init+0x2a/0x680 [ 57.510399][ C0] kernel_init_freeable+0x2fe/0x630 [ 57.510400][ C0] kernel_init+0x21/0x150 [ 57.510401][ C0] ret_from_fork+0x474/0x6b0 [ 57.510403][ C0] ret_from_fork_asm+0x11/0x20 [ 57.510404][ C0] } [ 57.510404][ C0] ... key at: [] __fs_reclaim_map+0x0/0xbe0 [ 57.510408][ C0] ... acquired at: [ 57.510409][ C0] __lock_acquire+0x518/0xc20 [ 57.510411][ C0] lock_acquire.part.0+0xd4/0x280 [ 57.510412][ C0] fs_reclaim_acquire+0xd5/0x120 [ 57.510413][ C0] __kmalloc_noprof+0xd3/0x760 [ 57.510414][ C0] alloc_buf.isra.0+0x4b/0x260 [ 57.510418][ C0] put_chars+0x1e1/0x2f0 [ 57.510419][ C0] hvc_console_print+0x292/0x780 [ 57.510421][ C0] console_emit_next_record+0x22f/0x4c0 [ 57.510423][ C0] console_flush_one_record+0x46f/0x710 [ 57.510425][ C0] console_unlock+0xee/0x1f0 [ 57.510426][ C0] vprintk_emit+0x37c/0x3e0 [ 57.510427][ C0] _printk+0xc7/0x100 [ 57.510430][ C0] tun_init+0x24/0xb0 [ 57.510433][ C0] do_one_initcall+0x124/0x4f0 [ 57.510435][ C0] kernel_init_freeable+0x596/0x630 [ 57.510436][ C0] kernel_init+0x21/0x150 [ 57.510437][ C0] ret_from_fork+0x474/0x6b0 [ 57.510438][ C0] ret_from_fork_asm+0x11/0x20 [ 57.510440][ C0] [ 57.510440][ C0] -> (console_owner){..-.}-{0:0} { [ 57.510442][ C0] IN-SOFTIRQ-W at: [ 57.510443][ C0] __lock_acquire+0x388/0xc20 [ 57.510444][ C0] lock_acquire.part.0+0xd4/0x280 [ 57.510445][ C0] console_lock_spinning_enable+0x5c/0x60 [ 57.510447][ C0] console_emit_next_record+0x1d1/0x4c0 [ 57.510449][ C0] console_flush_one_record+0x46f/0x710 [ 57.510450][ C0] console_unlock+0xee/0x1f0 [ 57.510452][ C0] vprintk_emit+0x37c/0x3e0 [ 57.510453][ C0] _printk+0xc7/0x100 [ 57.510454][ C0] clocksource_watchdog.part.0.cold+0x105/0x1dd [ 57.510456][ C0] call_timer_fn+0x160/0x4d0 [ 57.510458][ C0] __run_timers+0x68f/0xaa0 [ 57.510460][ C0] run_timer_softirq+0xf0/0x160 [ 57.510461][ C0] handle_softirqs+0x1d3/0x900 [ 57.510464][ C0] __irq_exit_rcu+0x145/0x1c0 [ 57.510465][ C0] irq_exit_rcu+0xe/0x30 [ 57.510467][ C0] sysvec_apic_timer_interrupt+0x9d/0xe0 [ 57.510468][ C0] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 57.510470][ C0] _raw_spin_unlock_irqrestore+0x36/0x80 [ 57.510472][ C0] uart_write+0x231/0x990 [ 57.510473][ C0] process_output_block+0x113/0x6d0 [ 57.510475][ C0] n_tty_write+0x3b4/0x8f0 [ 57.510477][ C0] iterate_tty_write+0x291/0x590 [ 57.510478][ C0] file_tty_write.isra.0+0x1bd/0x290 [ 57.510480][ C0] new_sync_write+0x33e/0x760 [ 57.510482][ C0] vfs_write+0x655/0x970 [ 57.510483][ C0] ksys_write+0x116/0x250 [ 57.510484][ C0] do_syscall_64+0xff/0x530 [ 57.510487][ C0] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 57.510488][ C0] INITIAL USE at: [ 57.510489][ C0] } [ 57.510489][ C0] ... key at: [] console_owner_dep_map+0x0/0x60 [ 57.510492][ C0] ... acquired at: [ 57.510492][ C0] mark_lock+0x1d7/0xa00 [ 57.510494][ C0] mark_usage+0x42/0x170 [ 57.510495][ C0] __lock_acquire+0x388/0xc20 [ 57.510496][ C0] lock_acquire.part.0+0xd4/0x280 [ 57.510498][ C0] console_lock_spinning_enable+0x5c/0x60 [ 57.510499][ C0] console_emit_next_record+0x1d1/0x4c0 [ 57.510501][ C0] console_flush_one_record+0x46f/0x710 [ 57.510502][ C0] console_unlock+0xee/0x1f0 [ 57.510504][ C0] vprintk_emit+0x37c/0x3e0 [ 57.510505][ C0] _printk+0xc7/0x100 [ 57.510506][ C0] clocksource_watchdog.part.0.cold+0x105/0x1dd [ 57.510507][ C0] call_timer_fn+0x160/0x4d0 [ 57.510509][ C0] __run_timers+0x68f/0xaa0 [ 57.510510][ C0] run_timer_softirq+0xf0/0x160 [ 57.510512][ C0] handle_softirqs+0x1d3/0x900 [ 57.510513][ C0] __irq_exit_rcu+0x145/0x1c0 [ 57.510514][ C0] irq_exit_rcu+0xe/0x30 [ 57.510515][ C0] sysvec_apic_timer_interrupt+0x9d/0xe0 [ 57.510517][ C0] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 57.510518][ C0] _raw_spin_unlock_irqrestore+0x36/0x80 [ 57.510519][ C0] uart_write+0x231/0x990 [ 57.510520][ C0] process_output_block+0x113/0x6d0 [ 57.510521][ C0] n_tty_write+0x3b4/0x8f0 [ 57.510523][ C0] iterate_tty_write+0x291/0x590 [ 57.510524][ C0] file_tty_write.isra.0+0x1bd/0x290 [ 57.510526][ C0] new_sync_write+0x33e/0x760 [ 57.510527][ C0] vfs_write+0x655/0x970 [ 57.510528][ C0] ksys_write+0x116/0x250 [ 57.510529][ C0] do_syscall_64+0xff/0x530 [ 57.510531][ C0] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 57.510531][ C0] [ 57.510532][ C0] [ 57.510532][ C0] stack backtrace: [ 57.510535][ C0] CPU: 0 UID: 0 PID: 189 Comm: perl Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 57.510538][ C0] Tainted: [W]=WARN [ 57.510538][ C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 57.510540][ C0] Call Trace: [ 57.510541][ C0] [ 57.510542][ C0] dump_stack_lvl+0x6f/0xa0 [ 57.510547][ C0] print_irq_inversion_bug.part.0.cold+0xe6/0x143 [ 57.510549][ C0] mark_lock_irq+0x989/0x9c0 [ 57.510551][ C0] ? add_lock_to_list+0x2c/0x1a0 [ 57.510554][ C0] mark_lock+0x1d7/0xa00 [ 57.510556][ C0] mark_usage+0x42/0x170 [ 57.510558][ C0] __lock_acquire+0x388/0xc20 [ 57.510560][ C0] lock_acquire.part.0+0xd4/0x280 [ 57.510562][ C0] ? console_lock_spinning_enable+0x40/0x60 [ 57.510564][ C0] ? rcu_is_watching+0x16/0xd0 [ 57.510566][ C0] ? lock_acquire+0x13c/0x160 [ 57.510568][ C0] console_lock_spinning_enable+0x5c/0x60 [ 57.510570][ C0] ? console_lock_spinning_enable+0x40/0x60 [ 57.510571][ C0] console_emit_next_record+0x1d1/0x4c0 [ 57.510574][ C0] ? devkmsg_read+0x4b0/0x4b0 [ 57.510575][ C0] ? console_flush_one_record+0x106/0x710 [ 57.510578][ C0] ? rcu_is_watching+0x16/0xd0 [ 57.510579][ C0] ? lock_acquire+0x13c/0x160 [ 57.510581][ C0] console_flush_one_record+0x46f/0x710 [ 57.510583][ C0] ? console_emit_next_record+0x4c0/0x4c0 [ 57.510585][ C0] ? __lock_acquire+0x518/0xc20 [ 57.510587][ C0] console_unlock+0xee/0x1f0 [ 57.510589][ C0] ? console_flush_one_record+0x710/0x710 [ 57.510591][ C0] ? rcu_is_watching+0x16/0xd0 [ 57.510592][ C0] ? lock_acquire+0xe0/0x160 [ 57.510594][ C0] ? __down_trylock_console_sem+0x5e/0xa0 [ 57.510596][ C0] ? vprintk_emit+0x320/0x3e0 [ 57.510597][ C0] vprintk_emit+0x37c/0x3e0 [ 57.510599][ C0] ? wake_up_klogd_work_func+0x90/0x90 [ 57.510600][ C0] ? clocksource_watchdog.part.0+0x450/0x540 [ 57.510602][ C0] _printk+0xc7/0x100 [ 57.510604][ C0] ? snapshot_read.cold+0x21/0x21 [ 57.510606][ C0] ? clocksource_watchdog.part.0+0x450/0x540 [ 57.510607][ C0] ? __lock_release.isra.0+0x69/0x1a0 [ 57.510610][ C0] clocksource_watchdog.part.0.cold+0x105/0x1dd [ 57.510611][ C0] ? clocksource_watchdog.part.0+0x540/0x540 [ 57.510613][ C0] ? clocksource_watchdog.part.0+0x540/0x540 [ 57.510614][ C0] call_timer_fn+0x160/0x4d0 [ 57.510617][ C0] ? detach_if_pending+0x1d0/0x1d0 [ 57.510619][ C0] ? debug_object_active_state+0x430/0x430 [ 57.510622][ C0] ? find_held_lock+0x2b/0x80 [ 57.510623][ C0] ? __lock_release.isra.0+0x69/0x1a0 [ 57.510625][ C0] ? mark_held_locks+0x40/0x70 [ 57.510627][ C0] __run_timers+0x68f/0xaa0 [ 57.510629][ C0] ? clocksource_watchdog.part.0+0x540/0x540 [ 57.510631][ C0] ? __bpf_trace_itimer_expire+0x10/0x10 [ 57.510633][ C0] ? __lock_acquire+0x518/0xc20 [ 57.510636][ C0] ? __rwlock_init+0x150/0x150 [ 57.510639][ C0] run_timer_softirq+0xf0/0x160 [ 57.510641][ C0] ? __run_timers+0xaa0/0xaa0 [ 57.510643][ C0] ? handle_softirqs+0x19c/0x900 [ 57.510644][ C0] ? rcu_is_watching+0x16/0xd0 [ 57.510646][ C0] handle_softirqs+0x1d3/0x900 [ 57.510648][ C0] ? __lock_release.isra.0+0x69/0x1a0 [ 57.510649][ C0] ? _local_bh_enable+0xc0/0xc0 [ 57.510651][ C0] __irq_exit_rcu+0x145/0x1c0 [ 57.510653][ C0] irq_exit_rcu+0xe/0x30 [ 57.510654][ C0] sysvec_apic_timer_interrupt+0x9d/0xe0 [ 57.510656][ C0] [ 57.510657][ C0] [ 57.510657][ C0] ? find_held_lock+0x2b/0x80 [ 57.510659][ C0] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 57.510660][ C0] RIP: 0010:_raw_spin_unlock_irqrestore+0x36/0x80 [ 57.510663][ C0] Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 41 90 78 fd 48 89 df e8 49 e6 78 fd f7 c5 00 02 00 00 75 1f 9c 58 f6 c4 02 75 2f 01 00 00 00 e8 d0 ae 6a fd 65 48 83 3d af bb 65 02 00 74 12 5b [ 57.510665][ C0] RSP: 0018:ffa0000001907a80 EFLAGS: 00000246 [ 57.510675][ C0] RAX: 0000000000000086 RBX: ffffffffaaafe500 RCX: ffffffffa67e0483 [ 57.510676][ C0] RDX: ff11000009edc740 RSI: ffffffffa7111042 RDI: ffffffffa6a949e0 [ 57.510677][ C0] RBP: 0000000000000286 R08: 0000000000000000 R09: 0000000000000000 [ 57.510678][ C0] R10: 0000000000000000 R11: 0000000000000001 R12: ffffffffaaafe620 [ 57.510679][ C0] R13: 0000000000000001 R14: ffffffffaaafe658 R15: ff1100001085a800 [ 57.510680][ C0] ? _raw_spin_unlock_irqrestore+0x53/0x80 [ 57.510683][ C0] uart_write+0x231/0x990 [ 57.510685][ C0] process_output_block+0x113/0x6d0 [ 57.510687][ C0] n_tty_write+0x3b4/0x8f0 [ 57.510690][ C0] ? n_tty_receive_signal_char+0x110/0x110 [ 57.510692][ C0] ? _mutex_trylock_nest_lock+0x235/0x390 [ 57.510693][ C0] ? add_wait_queue_priority_exclusive+0x1b0/0x1b0 [ 57.510696][ C0] ? tty_ldisc_ref_wait+0x28/0x80 [ 57.510698][ C0] iterate_tty_write+0x291/0x590 [ 57.510700][ C0] ? tty_ldisc_ref_wait+0x28/0x80 [ 57.510701][ C0] file_tty_write.isra.0+0x1bd/0x290 [ 57.510703][ C0] ? redirected_tty_write+0xd0/0xd0 [ 57.510705][ C0] new_sync_write+0x33e/0x760 [ 57.510707][ C0] ? __lock_release.isra.0+0x69/0x1a0 [ 57.510708][ C0] ? new_sync_read+0x750/0x750 [ 57.510711][ C0] vfs_write+0x655/0x970 [ 57.510713][ C0] ksys_write+0x116/0x250 [ 57.510715][ C0] ? __ia32_sys_read+0xc0/0xc0 [ 57.510716][ C0] ? rcu_is_watching+0x16/0xd0 [ 57.510718][ C0] do_syscall_64+0xff/0x530 [ 57.510720][ C0] ? irq_exit_rcu+0x1a/0x30 [ 57.510721][ C0] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 57.510722][ C0] RIP: 0033:0x7f470bf6154e [ 57.510725][ C0] Code: 4d 89 d8 e8 b4 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa [ 57.510726][ C0] RSP: 002b:00007ffe736da900 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 [ 57.510728][ C0] RAX: ffffffffffffffda RBX: 000056500588f2a0 RCX: 00007f470bf6154e [ 57.510729][ C0] RDX: 0000000000000001 RSI: 000056500588f2a0 RDI: 0000000000000001 [ 57.510730][ C0] RBP: 00007ffe736da910 R08: 0000000000000000 R09: 0000000000000000 [ 57.510730][ C0] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 [ 57.510731][ C0] R13: 0000565005856010 R14: 0000000000000001 R15: 000056500588f2a0 [ 57.510733][ C0] [ 57.510737][ C0] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 57.510739][ C0] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 189, name: perl [ 57.510740][ C0] preempt_count: 103, expected: 0 [ 57.510741][ C0] RCU nest depth: 0, expected: 0 [ 57.510741][ C0] INFO: lockdep is turned off. [ 57.510742][ C0] irq event stamp: 122323 [ 57.510743][ C0] hardirqs last enabled at (122322): [] __down_trylock_console_sem+0x86/0xa0 [ 57.510745][ C0] hardirqs last disabled at (122323): [] console_emit_next_record+0x3d4/0x4c0 [ 57.510747][ C0] softirqs last enabled at (121604): [] handle_softirqs+0x67c/0x900 [ 57.510749][ C0] softirqs last disabled at (122307): [] __irq_exit_rcu+0x145/0x1c0 [ 57.510750][ C0] Preemption disabled at: [ 57.510751][ C0] [<0000000000000000>] 0x0 [ 57.510753][ C0] CPU: 0 UID: 0 PID: 189 Comm: perl Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 57.510755][ C0] Tainted: [W]=WARN [ 57.510755][ C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 57.510756][ C0] Call Trace: [ 57.510756][ C0] [ 57.510757][ C0] dump_stack_lvl+0x6f/0xa0 [ 57.510760][ C0] __might_resched.cold+0x1fe/0x2c1 [ 57.510762][ C0] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 57.510766][ C0] ? rcu_is_watching+0x16/0xd0 [ 57.510767][ C0] __kmalloc_noprof+0x443/0x760 [ 57.510769][ C0] ? __rwlock_init+0x150/0x150 [ 57.510770][ C0] ? alloc_buf.isra.0+0x4b/0x260 [ 57.510773][ C0] ? do_raw_spin_unlock+0x59/0x250 [ 57.510774][ C0] alloc_buf.isra.0+0x4b/0x260 [ 57.510777][ C0] put_chars+0x1e1/0x2f0 [ 57.510779][ C0] ? __send_to_port+0x420/0x420 [ 57.510781][ C0] ? mark_lock+0x1d7/0xa00 [ 57.510783][ C0] hvc_console_print+0x292/0x780 [ 57.510786][ C0] ? hvc_write+0x3a0/0x3a0 [ 57.510788][ C0] ? rcu_is_watching+0x16/0xd0 [ 57.510789][ C0] ? rcu_is_watching+0x16/0xd0 [ 57.510790][ C0] console_emit_next_record+0x22f/0x4c0 [ 57.510793][ C0] ? devkmsg_read+0x4b0/0x4b0 [ 57.510794][ C0] ? console_flush_one_record+0x106/0x710 [ 57.510796][ C0] ? rcu_is_watching+0x16/0xd0 [ 57.510798][ C0] ? lock_acquire+0x13c/0x160 [ 57.510800][ C0] console_flush_one_record+0x46f/0x710 [ 57.510802][ C0] ? console_emit_next_record+0x4c0/0x4c0 [ 57.510804][ C0] ? __lock_acquire+0x518/0xc20 [ 57.510806][ C0] console_unlock+0xee/0x1f0 [ 57.510808][ C0] ? console_flush_one_record+0x710/0x710 [ 57.510810][ C0] ? rcu_is_watching+0x16/0xd0 [ 57.510811][ C0] ? lock_acquire+0xe0/0x160 [ 57.510813][ C0] ? __down_trylock_console_sem+0x5e/0xa0 [ 57.510814][ C0] ? vprintk_emit+0x320/0x3e0 [ 57.510816][ C0] vprintk_emit+0x37c/0x3e0 [ 57.510817][ C0] ? wake_up_klogd_work_func+0x90/0x90 [ 57.510819][ C0] ? clocksource_watchdog.part.0+0x450/0x540 [ 57.510821][ C0] _printk+0xc7/0x100 [ 57.510822][ C0] ? snapshot_read.cold+0x21/0x21 [ 57.510824][ C0] ? clocksource_watchdog.part.0+0x450/0x540 [ 57.510826][ C0] ? __lock_release.isra.0+0x69/0x1a0 [ 57.510828][ C0] clocksource_watchdog.part.0.cold+0x105/0x1dd [ 57.510829][ C0] ? clocksource_watchdog.part.0+0x540/0x540 [ 57.510831][ C0] ? clocksource_watchdog.part.0+0x540/0x540 [ 57.510833][ C0] call_timer_fn+0x160/0x4d0 [ 57.510835][ C0] ? detach_if_pending+0x1d0/0x1d0 [ 57.510837][ C0] ? debug_object_active_state+0x430/0x430 [ 57.510838][ C0] ? find_held_lock+0x2b/0x80 [ 57.510840][ C0] ? __lock_release.isra.0+0x69/0x1a0 [ 57.510842][ C0] ? mark_held_locks+0x40/0x70 [ 57.510844][ C0] __run_timers+0x68f/0xaa0 [ 57.510845][ C0] ? clocksource_watchdog.part.0+0x540/0x540 [ 57.510848][ C0] ? __bpf_trace_itimer_expire+0x10/0x10 [ 57.510850][ C0] ? __lock_acquire+0x518/0xc20 [ 57.510852][ C0] ? __rwlock_init+0x150/0x150 [ 57.510855][ C0] run_timer_softirq+0xf0/0x160 [ 57.510857][ C0] ? __run_timers+0xaa0/0xaa0 [ 57.510859][ C0] ? handle_softirqs+0x19c/0x900 [ 57.510860][ C0] ? rcu_is_watching+0x16/0xd0 [ 57.510861][ C0] handle_softirqs+0x1d3/0x900 [ 57.510863][ C0] ? __lock_release.isra.0+0x69/0x1a0 [ 57.510865][ C0] ? _local_bh_enable+0xc0/0xc0 [ 57.510867][ C0] __irq_exit_rcu+0x145/0x1c0 [ 57.510869][ C0] irq_exit_rcu+0xe/0x30 [ 57.510870][ C0] sysvec_apic_timer_interrupt+0x9d/0xe0 [ 57.510872][ C0] [ 57.510872][ C0] [ 57.510873][ C0] ? find_held_lock+0x2b/0x80 [ 57.510874][ C0] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 57.510875][ C0] RIP: 0010:_raw_spin_unlock_irqrestore+0x36/0x80 [ 57.510877][ C0] Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 41 90 78 fd 48 89 df e8 49 e6 78 fd f7 c5 00 02 00 00 75 1f 9c 58 f6 c4 02 75 2f 01 00 00 00 e8 d0 ae 6a fd 65 48 83 3d af bb 65 02 00 74 12 5b [ 57.510878][ C0] RSP: 0018:ffa0000001907a80 EFLAGS: 00000246 [ 57.510880][ C0] RAX: 0000000000000086 RBX: ffffffffaaafe500 RCX: ffffffffa67e0483 [ 57.510880][ C0] RDX: ff11000009edc740 RSI: ffffffffa7111042 RDI: ffffffffa6a949e0 [ 57.510881][ C0] RBP: 0000000000000286 R08: 0000000000000000 R09: 0000000000000000 [ 57.510882][ C0] R10: 0000000000000000 R11: 0000000000000001 R12: ffffffffaaafe620 [ 57.510882][ C0] R13: 0000000000000001 R14: ffffffffaaafe658 R15: ff1100001085a800 [ 57.510884][ C0] ? _raw_spin_unlock_irqrestore+0x53/0x80 [ 57.510886][ C0] uart_write+0x231/0x990 [ 57.510888][ C0] process_output_block+0x113/0x6d0 [ 57.510891][ C0] n_tty_write+0x3b4/0x8f0 [ 57.510893][ C0] ? n_tty_receive_signal_char+0x110/0x110 [ 57.510895][ C0] ? _mutex_trylock_nest_lock+0x235/0x390 [ 57.510896][ C0] ? add_wait_queue_priority_exclusive+0x1b0/0x1b0 [ 57.510898][ C0] ? tty_ldisc_ref_wait+0x28/0x80 [ 57.510900][ C0] iterate_tty_write+0x291/0x590 [ 57.510902][ C0] ? tty_ldisc_ref_wait+0x28/0x80 [ 57.510904][ C0] file_tty_write.isra.0+0x1bd/0x290 [ 57.510906][ C0] ? redirected_tty_write+0xd0/0xd0 [ 57.510907][ C0] new_sync_write+0x33e/0x760 [ 57.510909][ C0] ? __lock_release.isra.0+0x69/0x1a0 [ 57.510911][ C0] ? new_sync_read+0x750/0x750 [ 57.510913][ C0] vfs_write+0x655/0x970 [ 57.510915][ C0] ksys_write+0x116/0x250 [ 57.510917][ C0] ? __ia32_sys_read+0xc0/0xc0 [ 57.510918][ C0] ? rcu_is_watching+0x16/0xd0 [ 57.510920][ C0] do_syscall_64+0xff/0x530 [ 57.510922][ C0] ? irq_exit_rcu+0x1a/0x30 [ 57.510923][ C0] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 57.510925][ C0] RIP: 0033:0x7f470bf6154e [ 57.510926][ C0] Code: 4d 89 d8 e8 b4 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa [ 57.510927][ C0] RSP: 002b:00007ffe736da900 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 [ 57.510928][ C0] RAX: ffffffffffffffda RBX: 000056500588f2a0 RCX: 00007f470bf6154e [ 57.510928][ C0] RDX: 0000000000000001 RSI: 000056500588f2a0 RDI: 0000000000000001 [ 57.510929][ C0] RBP: 00007ffe736da910 R08: 0000000000000000 R09: 0000000000000000 [ 57.510930][ C0] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 [ 57.510930][ C0] R13: 0000565005856010 R14: 0000000000000001 R15: 000056500588f2a0 [ 57.510933][ C0]