[ 21.527993][ T183] (udev-worker) (183) used greatest stack depth: 22696 bytes left [ 21.528009][ T183] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 21.528011][ T183] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 183, name: (udev-worker) [ 21.528013][ T183] preempt_count: 2, expected: 0 [ 21.528014][ T183] RCU nest depth: 0, expected: 0 [ 21.528015][ T183] locks held by (udev-worker)/183: 5, last CPU#3: [ 21.528017][ T183] #0: ffffffff928027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0 [ 21.528028][ T183] #1: ffffffff92999cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 21.528033][ T183] #2: ffffffff92999d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 21.528038][ T183] #3: ffffffff92889660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 21.528041][ T183] #4: ffffffff92889560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x202/0x4f0 [ 21.528045][ T183] irq event stamp: 708560 [ 21.528046][ T183] hardirqs last enabled at (708559): [] __down_trylock_console_sem+0x86/0xa0 [ 21.528056][ T183] hardirqs last disabled at (708560): [] console_emit_next_record+0x3f8/0x4f0 [ 21.528059][ T183] softirqs last enabled at (708496): [] handle_softirqs+0x67c/0x900 [ 21.528061][ T183] softirqs last disabled at (708491): [] do_softirq+0xac/0xe0 [ 21.528064][ T183] Preemption disabled at: [ 21.528065][ T183] [<0000000000000000>] 0x0 [ 21.528072][ T183] CPU: 3 UID: 0 PID: 183 Comm: (udev-worker) Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 21.528075][ T183] Tainted: [W]=WARN [ 21.528077][ T183] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 21.528078][ T183] Call Trace: [ 21.528080][ T183] [ 21.528082][ T183] dump_stack_lvl+0x6f/0xa0 [ 21.528088][ T183] __might_resched.cold+0x1fe/0x2c1 [ 21.528093][ T183] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 21.528097][ T183] ? __kmalloc_noprof+0xdb/0x760 [ 21.528104][ T183] __kmalloc_noprof+0x443/0x760 [ 21.528106][ T183] ? alloc_buf.isra.0+0x4b/0x260 [ 21.528113][ T183] ? do_raw_spin_unlock+0x59/0x250 [ 21.528116][ T183] alloc_buf.isra.0+0x4b/0x260 [ 21.528120][ T183] put_chars+0x1e1/0x2f0 [ 21.528123][ T183] ? __send_to_port+0x420/0x420 [ 21.528125][ T183] ? printk_get_next_message+0x2fe/0x7d0 [ 21.528129][ T183] ? rcu_read_lock_any_held+0x3c/0x90 [ 21.528132][ T183] ? validate_chain+0x38b/0xc20 [ 21.528137][ T183] hvc_console_print+0x292/0x780 [ 21.528140][ T183] ? __lock_acquire+0x518/0xc20 [ 21.528142][ T183] ? __lock_acquire+0x518/0xc20 [ 21.528147][ T183] ? hvc_write+0x3a0/0x3a0 [ 21.528150][ T183] ? rcu_is_watching+0x16/0xd0 [ 21.528152][ T183] ? lock_acquire+0x13c/0x160 [ 21.528157][ T183] console_emit_next_record+0x252/0x4f0 [ 21.528161][ T183] ? devkmsg_read+0x4e0/0x4e0 [ 21.528166][ T183] ? rcu_is_watching+0x16/0xd0 [ 21.528167][ T183] ? lock_acquire+0x13c/0x160 [ 21.528174][ T183] console_flush_one_record+0x46f/0x710 [ 21.528181][ T183] ? console_emit_next_record+0x4f0/0x4f0 [ 21.528183][ T183] ? __lock_acquire+0x518/0xc20 [ 21.528188][ T183] console_unlock+0xee/0x1f0 [ 21.528191][ T183] ? console_flush_one_record+0x710/0x710 [ 21.528194][ T183] ? rcu_is_watching+0x16/0xd0 [ 21.528195][ T183] ? lock_acquire+0x60/0x160 [ 21.528199][ T183] ? __down_trylock_console_sem+0x5e/0xa0 [ 21.528201][ T183] ? vprintk_emit+0x320/0x3e0 [ 21.528204][ T183] vprintk_emit+0x37c/0x3e0 [ 21.528207][ T183] ? wake_up_klogd_work_func+0x90/0x90 [ 21.528210][ T183] ? __lock_acquire+0x518/0xc20 [ 21.528214][ T183] _printk+0xc7/0x100 [ 21.528218][ T183] ? snapshot_read.cold+0x21/0x21 [ 21.528221][ T183] ? do_raw_spin_lock+0x131/0x280 [ 21.528223][ T183] ? __rwlock_init+0x150/0x150 [ 21.528227][ T183] ? do_raw_spin_lock+0x131/0x280 [ 21.528231][ T183] do_exit.cold+0x82/0x9c [ 21.528234][ T183] ? exit_notify+0x890/0x890 [ 21.528236][ T183] ? __lock_release.isra.0+0x69/0x1a0 [ 21.528239][ T183] ? rcu_is_watching+0x16/0xd0 [ 21.528242][ T183] do_group_exit+0xb8/0x370 [ 21.528245][ T183] __x64_sys_exit_group+0x3c/0x50 [ 21.528247][ T183] x64_sys_call+0x1567/0x1570 [ 21.528250][ T183] do_syscall_64+0xff/0x530 [ 21.528254][ T183] ? exc_page_fault+0xee/0x100 [ 21.528257][ T183] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 21.528259][ T183] RIP: 0033:0x7f4a7a65f1b8 [ 21.528262][ T183] Code: Unable to access opcode bytes at 0x7f4a7a65f18e. [ 21.528263][ T183] RSP: 002b:00007fffd422f5f8 EFLAGS: 00000256 ORIG_RAX: 00000000000000e7 [ 21.528265][ T183] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4a7a65f1b8 [ 21.528267][ T183] RDX: 0000000000000000 RSI: fffffffffffffe90 RDI: 0000000000000000 [ 21.528268][ T183] RBP: 00007fffd422f780 R08: 00005570a6e1b6f8 R09: 0000000000000000 [ 21.528269][ T183] R10: 0000000000000000 R11: 0000000000000256 R12: 0000000000000000 [ 21.528269][ T183] R13: 00007f4a79ebd050 R14: 00007f4a7ab90d9e R15: 00005570a6defa00 [ 21.528276][ T183]