[ 16.245049][ T87] (udev-worker) (87) used greatest stack depth: 22696 bytes left [ 16.245068][ T87] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 16.245070][ T87] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 87, name: (udev-worker) [ 16.245071][ T87] preempt_count: 2, expected: 0 [ 16.245072][ T87] RCU nest depth: 0, expected: 0 [ 16.245073][ T87] locks held by (udev-worker)/87: 5, last CPU#3: [ 16.245076][ T87] #0: ffffffffb7a027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0 [ 16.245088][ T87] #1: ffffffffb7b99cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 16.245094][ T87] #2: ffffffffb7b99d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 16.245098][ T87] #3: ffffffffb7a89660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 16.245102][ T87] #4: ffffffffb7a89560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x202/0x4f0 [ 16.245105][ T87] irq event stamp: 904440 [ 16.245106][ T87] hardirqs last enabled at (904439): [] __down_trylock_console_sem+0x86/0xa0 [ 16.245108][ T87] hardirqs last disabled at (904440): [] console_emit_next_record+0x3f8/0x4f0 [ 16.245110][ T87] softirqs last enabled at (904376): [] netlink_release+0x17b/0xcf0 [ 16.245114][ T87] softirqs last disabled at (904374): [] netlink_release+0xd2/0xcf0 [ 16.245117][ T87] Preemption disabled at: [ 16.245118][ T87] [<0000000000000000>] 0x0 [ 16.245124][ T87] CPU: 3 UID: 0 PID: 87 Comm: (udev-worker) Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 16.245128][ T87] Tainted: [W]=WARN [ 16.245129][ T87] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 16.245131][ T87] Call Trace: [ 16.245132][ T87] [ 16.245134][ T87] dump_stack_lvl+0x6f/0xa0 [ 16.245140][ T87] __might_resched.cold+0x1fe/0x2c1 [ 16.245144][ T87] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 16.245148][ T87] ? __kmalloc_noprof+0xdb/0x760 [ 16.245152][ T87] __kmalloc_noprof+0x443/0x760 [ 16.245154][ T87] ? alloc_buf.isra.0+0x4b/0x260 [ 16.245160][ T87] ? do_raw_spin_unlock+0x59/0x250 [ 16.245162][ T87] alloc_buf.isra.0+0x4b/0x260 [ 16.245165][ T87] put_chars+0x1e1/0x2f0 [ 16.245168][ T87] ? __send_to_port+0x420/0x420 [ 16.245169][ T87] ? printk_get_next_message+0x2fe/0x7d0 [ 16.245173][ T87] ? rcu_read_lock_any_held+0x3c/0x90 [ 16.245176][ T87] ? validate_chain+0x38b/0xc20 [ 16.245180][ T87] hvc_console_print+0x292/0x780 [ 16.245182][ T87] ? __lock_acquire+0x518/0xc20 [ 16.245184][ T87] ? __lock_acquire+0x518/0xc20 [ 16.245188][ T87] ? hvc_write+0x3a0/0x3a0 [ 16.245191][ T87] ? rcu_is_watching+0x16/0xd0 [ 16.245194][ T87] ? lock_acquire+0x13c/0x160 [ 16.245198][ T87] console_emit_next_record+0x252/0x4f0 [ 16.245201][ T87] ? devkmsg_read+0x4e0/0x4e0 [ 16.245205][ T87] ? rcu_is_watching+0x16/0xd0 [ 16.245207][ T87] ? lock_acquire+0x13c/0x160 [ 16.245211][ T87] console_flush_one_record+0x46f/0x710 [ 16.245214][ T87] ? console_emit_next_record+0x4f0/0x4f0 [ 16.245216][ T87] ? __lock_acquire+0x518/0xc20 [ 16.245221][ T87] console_unlock+0xee/0x1f0 [ 16.245223][ T87] ? console_flush_one_record+0x710/0x710 [ 16.245225][ T87] ? rcu_is_watching+0x16/0xd0 [ 16.245227][ T87] ? lock_acquire+0x60/0x160 [ 16.245230][ T87] ? __down_trylock_console_sem+0x5e/0xa0 [ 16.245231][ T87] ? vprintk_emit+0x320/0x3e0 [ 16.245235][ T87] vprintk_emit+0x37c/0x3e0 [ 16.245238][ T87] ? wake_up_klogd_work_func+0x90/0x90 [ 16.245241][ T87] ? __lock_acquire+0x518/0xc20 [ 16.245244][ T87] _printk+0xc7/0x100 [ 16.245248][ T87] ? snapshot_read.cold+0x21/0x21 [ 16.245251][ T87] ? do_raw_spin_lock+0x131/0x280 [ 16.245253][ T87] ? __rwlock_init+0x150/0x150 [ 16.245256][ T87] ? do_raw_spin_lock+0x131/0x280 [ 16.245259][ T87] do_exit.cold+0x82/0x9c [ 16.245263][ T87] ? exit_notify+0x890/0x890 [ 16.245265][ T87] ? __lock_release.isra.0+0x69/0x1a0 [ 16.245267][ T87] ? rcu_is_watching+0x16/0xd0 [ 16.245271][ T87] do_group_exit+0xb8/0x370 [ 16.245274][ T87] __x64_sys_exit_group+0x3c/0x50 [ 16.245277][ T87] x64_sys_call+0x1567/0x1570 [ 16.245279][ T87] do_syscall_64+0xff/0x530 [ 16.245282][ T87] ? irq_exit_rcu+0x1a/0x30 [ 16.245285][ T87] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 16.245288][ T87] RIP: 0033:0x7f4dc09481b8 [ 16.245290][ T87] Code: Unable to access opcode bytes at 0x7f4dc094818e. [ 16.245292][ T87] RSP: 002b:00007ffe1c50f458 EFLAGS: 00000256 ORIG_RAX: 00000000000000e7 [ 16.245294][ T87] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4dc09481b8 [ 16.245295][ T87] RDX: 0000000000000000 RSI: fffffffffffffe90 RDI: 0000000000000000 [ 16.245296][ T87] RBP: 00007ffe1c50f5e0 R08: 0000556b3a4944c8 R09: 0000000000000000 [ 16.245297][ T87] R10: 0000000000000000 R11: 0000000000000256 R12: 0000000000000000 [ 16.245298][ T87] R13: 00007f4dc01a6050 R14: 00007f4dc0e79d9e R15: 0000556b3a3363f0 [ 16.245305][ T87]