[ 19.700010][ T493] nstat (493) used greatest stack depth: 23808 bytes left [ 19.700028][ T493] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 19.700030][ T493] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 493, name: nstat [ 19.700032][ T493] preempt_count: 2, expected: 0 [ 19.700033][ T493] RCU nest depth: 0, expected: 0 [ 19.700034][ T493] locks held by nstat/493: 5, last CPU#1: [ 19.700036][ T493] #0: ffffffffadc267b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0 [ 19.700051][ T493] #1: ffffffffadd8dcc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 19.700056][ T493] #2: ffffffffadd8dd38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 19.700060][ T493] #3: ffffffffadcad660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 19.700064][ T493] #4: ffffffffadcad560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x1df/0x4c0 [ 19.700067][ T493] irq event stamp: 45126 [ 19.700068][ T493] hardirqs last enabled at (45125): [] __down_trylock_console_sem+0x86/0xa0 [ 19.700071][ T493] hardirqs last disabled at (45126): [] console_emit_next_record+0x3d4/0x4c0 [ 19.700073][ T493] softirqs last enabled at (45120): [] handle_softirqs+0x67c/0x900 [ 19.700075][ T493] softirqs last disabled at (45113): [] __irq_exit_rcu+0x145/0x1c0 [ 19.700077][ T493] Preemption disabled at: [ 19.700078][ T493] [<0000000000000000>] 0x0 [ 19.700085][ T493] CPU: 1 UID: 0 PID: 493 Comm: nstat Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 19.700088][ T493] Tainted: [W]=WARN [ 19.700089][ T493] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 19.700090][ T493] Call Trace: [ 19.700092][ T493] [ 19.700094][ T493] dump_stack_lvl+0x6f/0xa0 [ 19.700100][ T493] __might_resched.cold+0x1fe/0x2c1 [ 19.700105][ T493] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 19.700108][ T493] ? __kmalloc_noprof+0xdb/0x760 [ 19.700113][ T493] __kmalloc_noprof+0x443/0x760 [ 19.700115][ T493] ? alloc_buf.isra.0+0x4b/0x260 [ 19.700122][ T493] ? do_raw_spin_unlock+0x59/0x250 [ 19.700124][ T493] alloc_buf.isra.0+0x4b/0x260 [ 19.700128][ T493] put_chars+0x1e1/0x2f0 [ 19.700132][ T493] ? __send_to_port+0x420/0x420 [ 19.700134][ T493] ? rcu_lockdep_current_cpu_online+0x3f/0x1b0 [ 19.700138][ T493] ? validate_chain+0x38b/0xc20 [ 19.700143][ T493] hvc_console_print+0x292/0x780 [ 19.700151][ T493] ? hvc_write+0x3a0/0x3a0 [ 19.700153][ T493] ? rcu_is_watching+0x16/0xd0 [ 19.700156][ T493] ? lock_acquire+0x13c/0x160 [ 19.700159][ T493] console_emit_next_record+0x22f/0x4c0 [ 19.700163][ T493] ? devkmsg_read+0x4b0/0x4b0 [ 19.700165][ T493] ? console_flush_one_record+0x106/0x710 [ 19.700168][ T493] ? rcu_is_watching+0x16/0xd0 [ 19.700170][ T493] ? lock_acquire+0x13c/0x160 [ 19.700173][ T493] console_flush_one_record+0x46f/0x710 [ 19.700177][ T493] ? console_emit_next_record+0x4c0/0x4c0 [ 19.700179][ T493] ? __lock_acquire+0x518/0xc20 [ 19.700184][ T493] console_unlock+0xee/0x1f0 [ 19.700186][ T493] ? console_flush_one_record+0x710/0x710 [ 19.700188][ T493] ? rcu_is_watching+0x16/0xd0 [ 19.700190][ T493] ? lock_acquire+0x60/0x160 [ 19.700193][ T493] ? __down_trylock_console_sem+0x5e/0xa0 [ 19.700195][ T493] ? vprintk_emit+0x320/0x3e0 [ 19.700198][ T493] vprintk_emit+0x37c/0x3e0 [ 19.700202][ T493] ? wake_up_klogd_work_func+0x90/0x90 [ 19.700205][ T493] ? __lock_acquire+0x518/0xc20 [ 19.700208][ T493] _printk+0xc7/0x100 [ 19.700212][ T493] ? snapshot_read.cold+0x21/0x21 [ 19.700215][ T493] ? do_raw_spin_lock+0x131/0x280 [ 19.700217][ T493] ? __rwlock_init+0x150/0x150 [ 19.700221][ T493] ? do_raw_spin_lock+0x131/0x280 [ 19.700223][ T493] do_exit.cold+0x82/0x9c [ 19.700227][ T493] ? exit_notify+0x890/0x890 [ 19.700229][ T493] ? __lock_release.isra.0+0x69/0x1a0 [ 19.700231][ T493] ? rcu_is_watching+0x16/0xd0 [ 19.700235][ T493] do_group_exit+0xb8/0x370 [ 19.700239][ T493] __x64_sys_exit_group+0x3c/0x50 [ 19.700241][ T493] x64_sys_call+0x1567/0x1570 [ 19.700243][ T493] do_syscall_64+0xff/0x530 [ 19.700246][ T493] ? exc_page_fault+0xee/0x100 [ 19.700250][ T493] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 19.700252][ T493] RIP: 0033:0x7f1226c411b8 [ 19.700255][ T493] Code: Unable to access opcode bytes at 0x7f1226c4118e. [ 19.700256][ T493] RSP: 002b:00007ffcd0ebfeb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 19.700258][ T493] RAX: ffffffffffffffda RBX: 00007f1226d71f88 RCX: 00007f1226c411b8 [ 19.700260][ T493] RDX: 00007f1226a68a88 RSI: ffffffffffffffa0 RDI: 0000000000000000 [ 19.700261][ T493] RBP: 00007ffcd0ebff10 R08: 0000000000000000 R09: 0000000000000000 [ 19.700261][ T493] R10: 00007ffcd0ebfcf0 R11: 0000000000000246 R12: 0000000000000001 [ 19.700262][ T493] R13: 0000000000000000 R14: 00007f1226d70680 R15: 00007f1226d71fa0 [ 19.700269][ T493] [ 44.418277][ C0] clocksource: Watchdog remote CPU 3 read timed out [ 44.418313][ C0] [ 44.418314][ C0] ======================================================== [ 44.418315][ C0] WARNING: possible irq lock inversion dependency detected [ 44.418318][ C0] 7.2.0-virtme #1 Tainted: G W [ 44.418320][ C0] -------------------------------------------------------- [ 44.418320][ C0] ksoftirqd/0/14 just changed the state of lock: [ 44.418321][ C0] ffffffffadcad660 (console_owner){..-.}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 44.418335][ C0] but this lock took another, SOFTIRQ-unsafe lock in the past: [ 44.418336][ C0] (fs_reclaim){+.+.}-{0:0} [ 44.418338][ C0] [ 44.418338][ C0] [ 44.418338][ C0] and interrupts could create inverse lock ordering between them. [ 44.418338][ C0] [ 44.418338][ C0] [ 44.418338][ C0] other info that might help us debug this: [ 44.418339][ C0] Possible interrupt unsafe locking scenario: [ 44.418339][ C0] [ 44.418339][ C0] CPU0 CPU1 [ 44.418340][ C0] ---- ---- [ 44.418340][ C0] lock(fs_reclaim); [ 44.418341][ C0] local_irq_disable(); [ 44.418342][ C0] lock(console_owner); [ 44.418343][ C0] lock(fs_reclaim); [ 44.418343][ C0] [ 44.418344][ C0] lock(console_owner); [ 44.418344][ C0] [ 44.418344][ C0] *** DEADLOCK *** [ 44.418344][ C0] [ 44.418345][ C0] locks held by ksoftirqd/0/14: 4, last CPU#0: [ 44.418346][ C0] #0: ffa00000000e7ab8 ((&watchdog_timer)){+.-.}-{0:0}, at: call_timer_fn+0x110/0x4d0 [ 44.418352][ C0] #1: ffffffffaddf28b8 (watchdog_lock){+.-.}-{3:3}, at: clocksource_watchdog+0x15/0x30 [ 44.418356][ C0] #2: ffffffffadd8dcc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 44.418359][ C0] #3: ffffffffadd8dd38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 44.418362][ C0] [ 44.418362][ C0] the shortest dependencies between 2nd lock and 1st lock: [ 44.418366][ C0] -> (fs_reclaim){+.+.}-{0:0} { [ 44.418368][ C0] HARDIRQ-ON-W at: [ 44.418369][ C0] __lock_acquire+0x388/0xc20 [ 44.418372][ C0] lock_acquire.part.0+0xd4/0x280 [ 44.418373][ C0] fs_reclaim_acquire+0xd5/0x120 [ 44.418377][ C0] __kmalloc_cache_noprof+0x6e/0x620 [ 44.418379][ C0] kthread_create_worker_on_node+0xea/0x210 [ 44.418382][ C0] workqueue_init+0x2a/0x680 [ 44.418386][ C0] kernel_init_freeable+0x2fe/0x630 [ 44.418388][ C0] kernel_init+0x21/0x150 [ 44.418392][ C0] ret_from_fork+0x474/0x6b0 [ 44.418396][ C0] ret_from_fork_asm+0x11/0x20 [ 44.418398][ C0] SOFTIRQ-ON-W at: [ 44.418399][ C0] __lock_acquire+0x388/0xc20 [ 44.418400][ C0] lock_acquire.part.0+0xd4/0x280 [ 44.418401][ C0] fs_reclaim_acquire+0xd5/0x120 [ 44.418403][ C0] __kmalloc_cache_noprof+0x6e/0x620 [ 44.418404][ C0] kthread_create_worker_on_node+0xea/0x210 [ 44.418406][ C0] workqueue_init+0x2a/0x680 [ 44.418407][ C0] kernel_init_freeable+0x2fe/0x630 [ 44.418408][ C0] kernel_init+0x21/0x150 [ 44.418409][ C0] ret_from_fork+0x474/0x6b0 [ 44.418411][ C0] ret_from_fork_asm+0x11/0x20 [ 44.418412][ C0] INITIAL USE at: [ 44.418413][ C0] __lock_acquire+0x388/0xc20 [ 44.418414][ C0] lock_acquire.part.0+0xd4/0x280 [ 44.418415][ C0] fs_reclaim_acquire+0xd5/0x120 [ 44.418417][ C0] __kmalloc_cache_noprof+0x6e/0x620 [ 44.418418][ C0] kthread_create_worker_on_node+0xea/0x210 [ 44.418419][ C0] workqueue_init+0x2a/0x680 [ 44.418420][ C0] kernel_init_freeable+0x2fe/0x630 [ 44.418421][ C0] kernel_init+0x21/0x150 [ 44.418423][ C0] ret_from_fork+0x474/0x6b0 [ 44.418425][ C0] ret_from_fork_asm+0x11/0x20 [ 44.418426][ C0] } [ 44.418426][ C0] ... key at: [] __fs_reclaim_map+0x0/0xbe0 [ 44.418430][ C0] ... acquired at: [ 44.418431][ C0] __lock_acquire+0x518/0xc20 [ 44.418432][ C0] lock_acquire.part.0+0xd4/0x280 [ 44.418433][ C0] fs_reclaim_acquire+0xd5/0x120 [ 44.418435][ C0] __kmalloc_noprof+0xd3/0x760 [ 44.418436][ C0] alloc_buf.isra.0+0x4b/0x260 [ 44.418439][ C0] put_chars+0x1e1/0x2f0 [ 44.418441][ C0] hvc_console_print+0x292/0x780 [ 44.418444][ C0] console_emit_next_record+0x22f/0x4c0 [ 44.418446][ C0] console_flush_one_record+0x46f/0x710 [ 44.418447][ C0] console_unlock+0xee/0x1f0 [ 44.418448][ C0] vprintk_emit+0x37c/0x3e0 [ 44.418450][ C0] dev_vprintk_emit+0x27f/0x2c0 [ 44.418453][ C0] dev_printk_emit+0xb9/0xee [ 44.418454][ C0] _dev_info+0xe2/0x116 [ 44.418456][ C0] cmos_do_probe+0x8be/0x98a [ 44.418458][ C0] platform_probe+0xfe/0x1f0 [ 44.418461][ C0] call_driver_probe+0x61/0x1c0 [ 44.418463][ C0] really_probe+0x199/0x760 [ 44.418464][ C0] __driver_probe_device+0x24f/0x440 [ 44.418466][ C0] driver_probe_device+0x4a/0xf0 [ 44.418467][ C0] __driver_attach+0x1b8/0x540 [ 44.418468][ C0] bus_for_each_dev+0x130/0x1e0 [ 44.418469][ C0] bus_add_driver+0x2c8/0x530 [ 44.418470][ C0] driver_register+0x1a3/0x390 [ 44.418472][ C0] __platform_driver_probe+0x13f/0x270 [ 44.418473][ C0] cmos_init+0x31/0x40 [ 44.418476][ C0] do_one_initcall+0x124/0x4f0 [ 44.418477][ C0] kernel_init_freeable+0x596/0x630 [ 44.418478][ C0] kernel_init+0x21/0x150 [ 44.418479][ C0] ret_from_fork+0x474/0x6b0 [ 44.418481][ C0] ret_from_fork_asm+0x11/0x20 [ 44.418482][ C0] [ 44.418482][ C0] -> (console_owner){..-.}-{0:0} { [ 44.418484][ C0] IN-SOFTIRQ-W at: [ 44.418485][ C0] __lock_acquire+0x388/0xc20 [ 44.418486][ C0] lock_acquire.part.0+0xd4/0x280 [ 44.418487][ C0] console_lock_spinning_enable+0x5c/0x60 [ 44.418488][ C0] console_emit_next_record+0x1d1/0x4c0 [ 44.418490][ C0] console_flush_one_record+0x46f/0x710 [ 44.418491][ C0] console_unlock+0xee/0x1f0 [ 44.418493][ C0] vprintk_emit+0x37c/0x3e0 [ 44.418494][ C0] _printk+0xc7/0x100 [ 44.418497][ C0] clocksource_watchdog.part.0.cold+0x105/0x1dd [ 44.418500][ C0] call_timer_fn+0x160/0x4d0 [ 44.418501][ C0] __run_timers+0x68f/0xaa0 [ 44.418502][ C0] run_timer_softirq+0xf0/0x160 [ 44.418504][ C0] handle_softirqs+0x1d3/0x900 [ 44.418506][ C0] run_ksoftirqd+0x39/0x60 [ 44.418507][ C0] smpboot_thread_fn+0x2fb/0x9b0 [ 44.418509][ C0] kthread+0x367/0x460 [ 44.418510][ C0] ret_from_fork+0x474/0x6b0 [ 44.418511][ C0] ret_from_fork_asm+0x11/0x20 [ 44.418513][ C0] INITIAL USE at: [ 44.418514][ C0] } [ 44.418514][ C0] ... key at: [] console_owner_dep_map+0x0/0x60 [ 44.418517][ C0] ... acquired at: [ 44.418517][ C0] mark_lock+0x1d7/0xa00 [ 44.418519][ C0] mark_usage+0x42/0x170 [ 44.418520][ C0] __lock_acquire+0x388/0xc20 [ 44.418521][ C0] lock_acquire.part.0+0xd4/0x280 [ 44.418522][ C0] console_lock_spinning_enable+0x5c/0x60 [ 44.418523][ C0] console_emit_next_record+0x1d1/0x4c0 [ 44.418525][ C0] console_flush_one_record+0x46f/0x710 [ 44.418526][ C0] console_unlock+0xee/0x1f0 [ 44.418527][ C0] vprintk_emit+0x37c/0x3e0 [ 44.418529][ C0] _printk+0xc7/0x100 [ 44.418530][ C0] clocksource_watchdog.part.0.cold+0x105/0x1dd [ 44.418531][ C0] call_timer_fn+0x160/0x4d0 [ 44.418532][ C0] __run_timers+0x68f/0xaa0 [ 44.418533][ C0] run_timer_softirq+0xf0/0x160 [ 44.418535][ C0] handle_softirqs+0x1d3/0x900 [ 44.418536][ C0] run_ksoftirqd+0x39/0x60 [ 44.418537][ C0] smpboot_thread_fn+0x2fb/0x9b0 [ 44.418538][ C0] kthread+0x367/0x460 [ 44.418539][ C0] ret_from_fork+0x474/0x6b0 [ 44.418540][ C0] ret_from_fork_asm+0x11/0x20 [ 44.418541][ C0] [ 44.418542][ C0] [ 44.418542][ C0] stack backtrace: [ 44.418544][ C0] CPU: 0 UID: 0 PID: 14 Comm: ksoftirqd/0 Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 44.418548][ C0] Tainted: [W]=WARN [ 44.418549][ C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 44.418550][ C0] Call Trace: [ 44.418551][ C0] [ 44.418553][ C0] dump_stack_lvl+0x6f/0xa0 [ 44.418557][ C0] print_irq_inversion_bug.part.0.cold+0xe6/0x143 [ 44.418559][ C0] mark_lock_irq+0x989/0x9c0 [ 44.418562][ C0] mark_lock+0x1d7/0xa00 [ 44.418563][ C0] mark_usage+0x42/0x170 [ 44.418565][ C0] __lock_acquire+0x388/0xc20 [ 44.418567][ C0] lock_acquire.part.0+0xd4/0x280 [ 44.418568][ C0] ? console_lock_spinning_enable+0x40/0x60 [ 44.418570][ C0] ? rcu_is_watching+0x16/0xd0 [ 44.418573][ C0] ? lock_acquire+0x13c/0x160 [ 44.418575][ C0] console_lock_spinning_enable+0x5c/0x60 [ 44.418576][ C0] ? console_lock_spinning_enable+0x40/0x60 [ 44.418578][ C0] console_emit_next_record+0x1d1/0x4c0 [ 44.418580][ C0] ? devkmsg_read+0x4b0/0x4b0 [ 44.418581][ C0] ? console_flush_one_record+0x106/0x710 [ 44.418583][ C0] ? rcu_is_watching+0x16/0xd0 [ 44.418584][ C0] ? lock_acquire+0x13c/0x160 [ 44.418586][ C0] console_flush_one_record+0x46f/0x710 [ 44.418588][ C0] ? console_emit_next_record+0x4c0/0x4c0 [ 44.418590][ C0] ? __lock_acquire+0x518/0xc20 [ 44.418592][ C0] console_unlock+0xee/0x1f0 [ 44.418593][ C0] ? console_flush_one_record+0x710/0x710 [ 44.418595][ C0] ? rcu_is_watching+0x16/0xd0 [ 44.418596][ C0] ? lock_acquire+0x60/0x160 [ 44.418598][ C0] ? __down_trylock_console_sem+0x5e/0xa0 [ 44.418599][ C0] ? vprintk_emit+0x320/0x3e0 [ 44.418601][ C0] vprintk_emit+0x37c/0x3e0 [ 44.418603][ C0] ? wake_up_klogd_work_func+0x90/0x90 [ 44.418605][ C0] ? clocksource_watchdog.part.0+0x450/0x540 [ 44.418607][ C0] _printk+0xc7/0x100 [ 44.418609][ C0] ? snapshot_read.cold+0x21/0x21 [ 44.418611][ C0] ? clocksource_watchdog.part.0+0x450/0x540 [ 44.418612][ C0] ? __lock_release.isra.0+0x69/0x1a0 [ 44.418614][ C0] clocksource_watchdog.part.0.cold+0x105/0x1dd [ 44.418615][ C0] ? clocksource_watchdog.part.0+0x540/0x540 [ 44.418617][ C0] ? clocksource_watchdog.part.0+0x540/0x540 [ 44.418618][ C0] call_timer_fn+0x160/0x4d0 [ 44.418620][ C0] ? detach_if_pending+0x1d0/0x1d0 [ 44.418622][ C0] ? find_held_lock+0x2b/0x80 [ 44.418624][ C0] ? __lock_release.isra.0+0x69/0x1a0 [ 44.418626][ C0] ? rcu_is_watching+0x16/0xd0 [ 44.418628][ C0] __run_timers+0x68f/0xaa0 [ 44.418629][ C0] ? clocksource_watchdog.part.0+0x540/0x540 [ 44.418631][ C0] ? __bpf_trace_itimer_expire+0x10/0x10 [ 44.418633][ C0] ? __lock_acquire+0x518/0xc20 [ 44.418635][ C0] ? __rwlock_init+0x150/0x150 [ 44.418637][ C0] run_timer_softirq+0xf0/0x160 [ 44.418639][ C0] ? __run_timers+0xaa0/0xaa0 [ 44.418641][ C0] ? trace_irq_enable.constprop.0+0x9b/0x160 [ 44.418644][ C0] ? trace_irq_disable.constprop.0+0x9b/0x160 [ 44.418646][ C0] ? rcu_is_watching+0x16/0xd0 [ 44.418647][ C0] handle_softirqs+0x1d3/0x900 [ 44.418649][ C0] ? _local_bh_enable+0xc0/0xc0 [ 44.418650][ C0] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 44.418653][ C0] ? rcu_is_watching+0x16/0xd0 [ 44.418654][ C0] ? rcu_is_watching+0x16/0xd0 [ 44.418656][ C0] run_ksoftirqd+0x39/0x60 [ 44.418657][ C0] smpboot_thread_fn+0x2fb/0x9b0 [ 44.418659][ C0] ? sort_range+0x20/0x20 [ 44.418660][ C0] kthread+0x367/0x460 [ 44.418661][ C0] ? trace_irq_enable.constprop.0+0x9b/0x160 [ 44.418663][ C0] ? kthread_affine_preferred+0x4c0/0x4c0 [ 44.418665][ C0] ret_from_fork+0x474/0x6b0 [ 44.418667][ C0] ? arch_exit_to_user_mode_prepare.isra.0+0x120/0x120 [ 44.418669][ C0] ? __switch_to+0x5a3/0xe00 [ 44.418671][ C0] ? kthread_affine_preferred+0x4c0/0x4c0 [ 44.418673][ C0] ret_from_fork_asm+0x11/0x20 [ 44.418675][ C0] [ 44.418680][ C0] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 44.418681][ C0] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 14, name: ksoftirqd/0 [ 44.418683][ C0] preempt_count: 102, expected: 0 [ 44.418684][ C0] RCU nest depth: 0, expected: 0 [ 44.418684][ C0] INFO: lockdep is turned off. [ 44.418685][ C0] irq event stamp: 1954221 [ 44.418685][ C0] hardirqs last enabled at (1954220): [] __down_trylock_console_sem+0x86/0xa0 [ 44.418687][ C0] hardirqs last disabled at (1954221): [] console_emit_next_record+0x3d4/0x4c0 [ 44.418689][ C0] softirqs last enabled at (1953840): [] handle_softirqs+0x67c/0x900 [ 44.418690][ C0] softirqs last disabled at (1953843): [] run_ksoftirqd+0x39/0x60 [ 44.418692][ C0] Preemption disabled at: [ 44.418692][ C0] [] handle_softirqs+0xf6/0x900 [ 44.418694][ C0] CPU: 0 UID: 0 PID: 14 Comm: ksoftirqd/0 Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 44.418696][ C0] Tainted: [W]=WARN [ 44.418697][ C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 44.418698][ C0] Call Trace: [ 44.418698][ C0] [ 44.418699][ C0] dump_stack_lvl+0x6f/0xa0 [ 44.418700][ C0] ? handle_softirqs+0xf6/0x900 [ 44.418702][ C0] __might_resched.cold+0x1fe/0x2c1 [ 44.418704][ C0] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 44.418706][ C0] ? nbcon_get_cpu_emergency_nesting+0xa/0x30 [ 44.418708][ C0] ? rcu_is_watching+0x16/0xd0 [ 44.418710][ C0] __kmalloc_noprof+0x443/0x760 [ 44.418712][ C0] ? __rwlock_init+0x150/0x150 [ 44.418713][ C0] ? alloc_buf.isra.0+0x4b/0x260 [ 44.418715][ C0] ? do_raw_spin_unlock+0x59/0x250 [ 44.418717][ C0] alloc_buf.isra.0+0x4b/0x260 [ 44.418719][ C0] put_chars+0x1e1/0x2f0 [ 44.418722][ C0] ? __send_to_port+0x420/0x420 [ 44.418724][ C0] ? mark_lock+0x1d7/0xa00 [ 44.418726][ C0] hvc_console_print+0x292/0x780 [ 44.418729][ C0] ? hvc_write+0x3a0/0x3a0 [ 44.418731][ C0] ? lock_acquire+0x13c/0x160 [ 44.418732][ C0] console_emit_next_record+0x22f/0x4c0 [ 44.418735][ C0] ? devkmsg_read+0x4b0/0x4b0 [ 44.418736][ C0] ? console_flush_one_record+0x106/0x710 [ 44.418738][ C0] ? rcu_is_watching+0x16/0xd0 [ 44.418739][ C0] ? lock_acquire+0x13c/0x160 [ 44.418741][ C0] console_flush_one_record+0x46f/0x710 [ 44.418743][ C0] ? console_emit_next_record+0x4c0/0x4c0 [ 44.418744][ C0] ? __lock_acquire+0x518/0xc20 [ 44.418746][ C0] console_unlock+0xee/0x1f0 [ 44.418748][ C0] ? console_flush_one_record+0x710/0x710 [ 44.418750][ C0] ? rcu_is_watching+0x16/0xd0 [ 44.418751][ C0] ? lock_acquire+0x60/0x160 [ 44.418753][ C0] ? __down_trylock_console_sem+0x5e/0xa0 [ 44.418754][ C0] ? vprintk_emit+0x320/0x3e0 [ 44.418756][ C0] vprintk_emit+0x37c/0x3e0 [ 44.418758][ C0] ? wake_up_klogd_work_func+0x90/0x90 [ 44.418760][ C0] ? clocksource_watchdog.part.0+0x450/0x540 [ 44.418761][ C0] _printk+0xc7/0x100 [ 44.418763][ C0] ? snapshot_read.cold+0x21/0x21 [ 44.418765][ C0] ? clocksource_watchdog.part.0+0x450/0x540 [ 44.418766][ C0] ? __lock_release.isra.0+0x69/0x1a0 [ 44.418768][ C0] clocksource_watchdog.part.0.cold+0x105/0x1dd [ 44.418769][ C0] ? clocksource_watchdog.part.0+0x540/0x540 [ 44.418771][ C0] ? clocksource_watchdog.part.0+0x540/0x540 [ 44.418772][ C0] call_timer_fn+0x160/0x4d0 [ 44.418774][ C0] ? detach_if_pending+0x1d0/0x1d0 [ 44.418775][ C0] ? find_held_lock+0x2b/0x80 [ 44.418778][ C0] ? __lock_release.isra.0+0x69/0x1a0 [ 44.418779][ C0] ? rcu_is_watching+0x16/0xd0 [ 44.418781][ C0] __run_timers+0x68f/0xaa0 [ 44.418783][ C0] ? clocksource_watchdog.part.0+0x540/0x540 [ 44.418785][ C0] ? __bpf_trace_itimer_expire+0x10/0x10 [ 44.418786][ C0] ? __lock_acquire+0x518/0xc20 [ 44.418788][ C0] ? __rwlock_init+0x150/0x150 [ 44.418790][ C0] run_timer_softirq+0xf0/0x160 [ 44.418792][ C0] ? __run_timers+0xaa0/0xaa0 [ 44.418794][ C0] ? trace_irq_enable.constprop.0+0x9b/0x160 [ 44.418796][ C0] ? trace_irq_disable.constprop.0+0x9b/0x160 [ 44.418799][ C0] ? rcu_is_watching+0x16/0xd0 [ 44.418801][ C0] handle_softirqs+0x1d3/0x900 [ 44.418804][ C0] ? _local_bh_enable+0xc0/0xc0 [ 44.418805][ C0] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 44.418807][ C0] ? rcu_is_watching+0x16/0xd0 [ 44.418808][ C0] ? rcu_is_watching+0x16/0xd0 [ 44.418810][ C0] run_ksoftirqd+0x39/0x60 [ 44.418811][ C0] smpboot_thread_fn+0x2fb/0x9b0 [ 44.418813][ C0] ? sort_range+0x20/0x20 [ 44.418814][ C0] kthread+0x367/0x460 [ 44.418816][ C0] ? trace_irq_enable.constprop.0+0x9b/0x160 [ 44.418817][ C0] ? kthread_affine_preferred+0x4c0/0x4c0 [ 44.418819][ C0] ret_from_fork+0x474/0x6b0 [ 44.418821][ C0] ? arch_exit_to_user_mode_prepare.isra.0+0x120/0x120 [ 44.418823][ C0] ? __switch_to+0x5a3/0xe00 [ 44.418825][ C0] ? kthread_affine_preferred+0x4c0/0x4c0 [ 44.418826][ C0] ret_from_fork_asm+0x11/0x20 [ 44.418829][ C0]