[ 12.459418][ T84] (udev-worker) (84) used greatest stack depth: 22696 bytes left [ 12.459441][ T84] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 12.459443][ T84] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 84, name: (udev-worker) [ 12.459445][ T84] preempt_count: 2, expected: 0 [ 12.459445][ T84] RCU nest depth: 0, expected: 0 [ 12.459446][ T84] locks held by (udev-worker)/84: 5, last CPU#3: [ 12.459448][ T84] #0: ffffffffa66027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0 [ 12.459461][ T84] #1: ffffffffa6799dc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 12.459467][ T84] #2: ffffffffa6799e38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 12.459471][ T84] #3: ffffffffa6689760 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 12.459475][ T84] #4: ffffffffa6689660 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x202/0x4f0 [ 12.459480][ T84] irq event stamp: 387080 [ 12.459481][ T84] hardirqs last enabled at (387079): [] __down_trylock_console_sem+0x86/0xa0 [ 12.459483][ T84] hardirqs last disabled at (387080): [] console_emit_next_record+0x3f8/0x4f0 [ 12.459485][ T84] softirqs last enabled at (387014): [] handle_softirqs+0x67c/0x900 [ 12.459487][ T84] softirqs last disabled at (385929): [] do_softirq+0xac/0xe0 [ 12.459490][ T84] Preemption disabled at: [ 12.459490][ T84] [<0000000000000000>] 0x0 [ 12.459497][ T84] CPU: 3 UID: 0 PID: 84 Comm: (udev-worker) Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 12.459501][ T84] Tainted: [W]=WARN [ 12.459502][ T84] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 12.459503][ T84] Call Trace: [ 12.459505][ T84] [ 12.459507][ T84] dump_stack_lvl+0x6f/0xa0 [ 12.459513][ T84] __might_resched.cold+0x1fe/0x2c1 [ 12.459517][ T84] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 12.459521][ T84] ? __kmalloc_noprof+0xdb/0x760 [ 12.459527][ T84] __kmalloc_noprof+0x443/0x760 [ 12.459529][ T84] ? alloc_buf.isra.0+0x4b/0x260 [ 12.459536][ T84] ? do_raw_spin_unlock+0x59/0x250 [ 12.459539][ T84] alloc_buf.isra.0+0x4b/0x260 [ 12.459543][ T84] put_chars+0x1e1/0x2f0 [ 12.459546][ T84] ? __send_to_port+0x420/0x420 [ 12.459548][ T84] ? printk_get_next_message+0x2fe/0x7d0 [ 12.459552][ T84] ? rcu_read_lock_any_held+0x3c/0x90 [ 12.459555][ T84] ? validate_chain+0x38b/0xc20 [ 12.459559][ T84] hvc_console_print+0x292/0x780 [ 12.459563][ T84] ? __lock_acquire+0x518/0xc20 [ 12.459564][ T84] ? __lock_acquire+0x518/0xc20 [ 12.459569][ T84] ? hvc_write+0x3a0/0x3a0 [ 12.459572][ T84] ? rcu_is_watching+0x16/0xd0 [ 12.459576][ T84] ? lock_acquire+0x13c/0x160 [ 12.459580][ T84] console_emit_next_record+0x252/0x4f0 [ 12.459584][ T84] ? devkmsg_read+0x4e0/0x4e0 [ 12.459588][ T84] ? rcu_is_watching+0x16/0xd0 [ 12.459590][ T84] ? lock_acquire+0x13c/0x160 [ 12.459594][ T84] console_flush_one_record+0x46f/0x710 [ 12.459599][ T84] ? console_emit_next_record+0x4f0/0x4f0 [ 12.459600][ T84] ? __lock_acquire+0x518/0xc20 [ 12.459605][ T84] console_unlock+0xee/0x1f0 [ 12.459608][ T84] ? console_flush_one_record+0x710/0x710 [ 12.459610][ T84] ? rcu_is_watching+0x16/0xd0 [ 12.459612][ T84] ? lock_acquire+0xa0/0x160 [ 12.459616][ T84] ? __down_trylock_console_sem+0x5e/0xa0 [ 12.459618][ T84] ? vprintk_emit+0x320/0x3e0 [ 12.459621][ T84] vprintk_emit+0x37c/0x3e0 [ 12.459625][ T84] ? wake_up_klogd_work_func+0x90/0x90 [ 12.459628][ T84] ? __lock_acquire+0x518/0xc20 [ 12.459632][ T84] _printk+0xc7/0x100 [ 12.459636][ T84] ? snapshot_read.cold+0x21/0x21 [ 12.459638][ T84] ? do_raw_spin_lock+0x131/0x280 [ 12.459641][ T84] ? __rwlock_init+0x150/0x150 [ 12.459645][ T84] ? do_raw_spin_lock+0x131/0x280 [ 12.459647][ T84] do_exit.cold+0x82/0x9c [ 12.459651][ T84] ? exit_notify+0x890/0x890 [ 12.459652][ T84] ? __lock_release.isra.0+0x69/0x1a0 [ 12.459655][ T84] ? rcu_is_watching+0x16/0xd0 [ 12.459659][ T84] do_group_exit+0xb8/0x370 [ 12.459662][ T84] __x64_sys_exit_group+0x3c/0x50 [ 12.459664][ T84] x64_sys_call+0x1567/0x1570 [ 12.459666][ T84] do_syscall_64+0xff/0x530 [ 12.459669][ T84] ? irq_exit_rcu+0x1a/0x30 [ 12.459672][ T84] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 12.459674][ T84] RIP: 0033:0x7f4e77d871b8 [ 12.459677][ T84] Code: Unable to access opcode bytes at 0x7f4e77d8718e. [ 12.459678][ T84] RSP: 002b:00007ffc426c7df8 EFLAGS: 00000256 ORIG_RAX: 00000000000000e7 [ 12.459680][ T84] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4e77d871b8 [ 12.459682][ T84] RDX: 0000000000000000 RSI: fffffffffffffe90 RDI: 0000000000000000 [ 12.459683][ T84] RBP: 00007ffc426c7f80 R08: 000055b9dcd18cc8 R09: 0000000000000000 [ 12.459684][ T84] R10: 0000000000000000 R11: 0000000000000256 R12: 0000000000000000 [ 12.459684][ T84] R13: 00007f4e775e5050 R14: 00007f4e782b8d9e R15: 000055b9dcbbe650 [ 12.459691][ T84]