[ 12.182387][ T87] (udev-worker) (87) used greatest stack depth: 22696 bytes left [ 12.182406][ T87] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 12.182408][ T87] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 87, name: (udev-worker) [ 12.182409][ T87] preempt_count: 2, expected: 0 [ 12.182410][ T87] RCU nest depth: 0, expected: 0 [ 12.182411][ T87] locks held by (udev-worker)/87: 5, last CPU#1: [ 12.182413][ T87] #0: ffffffffbb6027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0 [ 12.182425][ T87] #1: ffffffffbb799dc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 12.182430][ T87] #2: ffffffffbb799e38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 12.182435][ T87] #3: ffffffffbb689760 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 12.182439][ T87] #4: ffffffffbb689660 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x202/0x4f0 [ 12.182443][ T87] irq event stamp: 390522 [ 12.182444][ T87] hardirqs last enabled at (390521): [] __down_trylock_console_sem+0x86/0xa0 [ 12.182446][ T87] hardirqs last disabled at (390522): [] console_emit_next_record+0x3f8/0x4f0 [ 12.182448][ T87] softirqs last enabled at (390456): [] netlink_release+0x17b/0xcf0 [ 12.182452][ T87] softirqs last disabled at (390454): [] netlink_release+0xd2/0xcf0 [ 12.182455][ T87] Preemption disabled at: [ 12.182456][ T87] [<0000000000000000>] 0x0 [ 12.182463][ T87] CPU: 1 UID: 0 PID: 87 Comm: (udev-worker) Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 12.182467][ T87] Tainted: [W]=WARN [ 12.182468][ T87] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 12.182470][ T87] Call Trace: [ 12.182471][ T87] [ 12.182473][ T87] dump_stack_lvl+0x6f/0xa0 [ 12.182479][ T87] __might_resched.cold+0x1fe/0x2c1 [ 12.182484][ T87] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 12.182488][ T87] ? __kmalloc_noprof+0xdb/0x760 [ 12.182493][ T87] __kmalloc_noprof+0x443/0x760 [ 12.182496][ T87] ? alloc_buf.isra.0+0x4b/0x260 [ 12.182503][ T87] ? do_raw_spin_unlock+0x59/0x250 [ 12.182505][ T87] alloc_buf.isra.0+0x4b/0x260 [ 12.182509][ T87] put_chars+0x1e1/0x2f0 [ 12.182513][ T87] ? __send_to_port+0x420/0x420 [ 12.182515][ T87] ? printk_get_next_message+0x2fe/0x7d0 [ 12.182519][ T87] ? rcu_read_lock_any_held+0x3c/0x90 [ 12.182521][ T87] ? validate_chain+0x38b/0xc20 [ 12.182526][ T87] hvc_console_print+0x292/0x780 [ 12.182529][ T87] ? __lock_acquire+0x518/0xc20 [ 12.182531][ T87] ? __lock_acquire+0x518/0xc20 [ 12.182536][ T87] ? hvc_write+0x3a0/0x3a0 [ 12.182540][ T87] ? rcu_is_watching+0x16/0xd0 [ 12.182543][ T87] ? lock_acquire+0x13c/0x160 [ 12.182547][ T87] console_emit_next_record+0x252/0x4f0 [ 12.182551][ T87] ? devkmsg_read+0x4e0/0x4e0 [ 12.182556][ T87] ? rcu_is_watching+0x16/0xd0 [ 12.182558][ T87] ? lock_acquire+0x13c/0x160 [ 12.182562][ T87] console_flush_one_record+0x46f/0x710 [ 12.182567][ T87] ? console_emit_next_record+0x4f0/0x4f0 [ 12.182569][ T87] ? __lock_acquire+0x518/0xc20 [ 12.182574][ T87] console_unlock+0xee/0x1f0 [ 12.182577][ T87] ? console_flush_one_record+0x710/0x710 [ 12.182579][ T87] ? rcu_is_watching+0x16/0xd0 [ 12.182581][ T87] ? lock_acquire+0xa0/0x160 [ 12.182585][ T87] ? __down_trylock_console_sem+0x5e/0xa0 [ 12.182587][ T87] ? vprintk_emit+0x320/0x3e0 [ 12.182590][ T87] vprintk_emit+0x37c/0x3e0 [ 12.182594][ T87] ? wake_up_klogd_work_func+0x90/0x90 [ 12.182598][ T87] ? __lock_acquire+0x518/0xc20 [ 12.182602][ T87] _printk+0xc7/0x100 [ 12.182606][ T87] ? snapshot_read.cold+0x21/0x21 [ 12.182608][ T87] ? do_raw_spin_lock+0x131/0x280 [ 12.182611][ T87] ? __rwlock_init+0x150/0x150 [ 12.182615][ T87] ? do_raw_spin_lock+0x131/0x280 [ 12.182618][ T87] do_exit.cold+0x82/0x9c [ 12.182622][ T87] ? exit_notify+0x890/0x890 [ 12.182623][ T87] ? __lock_release.isra.0+0x69/0x1a0 [ 12.182626][ T87] ? rcu_is_watching+0x16/0xd0 [ 12.182631][ T87] do_group_exit+0xb8/0x370 [ 12.182633][ T87] __x64_sys_exit_group+0x3c/0x50 [ 12.182635][ T87] x64_sys_call+0x1567/0x1570 [ 12.182638][ T87] do_syscall_64+0xff/0x530 [ 12.182645][ T87] ? exc_page_fault+0xee/0x100 [ 12.182649][ T87] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 12.182651][ T87] RIP: 0033:0x7f0c194ab1b8 [ 12.182654][ T87] Code: Unable to access opcode bytes at 0x7f0c194ab18e. [ 12.182655][ T87] RSP: 002b:00007ffda621a3d8 EFLAGS: 00000256 ORIG_RAX: 00000000000000e7 [ 12.182658][ T87] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f0c194ab1b8 [ 12.182659][ T87] RDX: 0000000000000000 RSI: fffffffffffffe90 RDI: 0000000000000000 [ 12.182660][ T87] RBP: 00007ffda621a560 R08: 0000562b7c4f66a8 R09: 0000000000000000 [ 12.182661][ T87] R10: 0000000000000000 R11: 0000000000000256 R12: 0000000000000000 [ 12.182662][ T87] R13: 00007f0c18d09050 R14: 00007f0c199dcd9e R15: 0000562b7c4f1a50 [ 12.182669][ T87]