[ 15.292454][ T178] (udev-worker) (178) used greatest stack depth: 22696 bytes left [ 15.292474][ T178] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 15.292477][ T178] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 178, name: (udev-worker) [ 15.292479][ T178] preempt_count: 2, expected: 0 [ 15.292479][ T178] RCU nest depth: 0, expected: 0 [ 15.292480][ T178] locks held by (udev-worker)/178: 5, last CPU#2: [ 15.292483][ T178] #0: ffffffff944027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0 [ 15.292494][ T178] #1: ffffffff94599cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 15.292500][ T178] #2: ffffffff94599d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 15.292504][ T178] #3: ffffffff94489660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 15.292508][ T178] #4: ffffffff94489560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x202/0x4f0 [ 15.292513][ T178] irq event stamp: 87250 [ 15.292513][ T178] hardirqs last enabled at (87249): [] __down_trylock_console_sem+0x86/0xa0 [ 15.292516][ T178] hardirqs last disabled at (87250): [] console_emit_next_record+0x3f8/0x4f0 [ 15.292519][ T178] softirqs last enabled at (87186): [] netlink_release+0x17b/0xcf0 [ 15.292524][ T178] softirqs last disabled at (87184): [] netlink_release+0xd2/0xcf0 [ 15.292527][ T178] Preemption disabled at: [ 15.292527][ T178] [<0000000000000000>] 0x0 [ 15.292534][ T178] CPU: 2 UID: 0 PID: 178 Comm: (udev-worker) Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 15.292538][ T178] Tainted: [W]=WARN [ 15.292539][ T178] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 15.292540][ T178] Call Trace: [ 15.292542][ T178] [ 15.292544][ T178] dump_stack_lvl+0x6f/0xa0 [ 15.292550][ T178] __might_resched.cold+0x1fe/0x2c1 [ 15.292555][ T178] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 15.292560][ T178] ? __kmalloc_noprof+0xdb/0x760 [ 15.292566][ T178] __kmalloc_noprof+0x443/0x760 [ 15.292568][ T178] ? alloc_buf.isra.0+0x4b/0x260 [ 15.292575][ T178] ? do_raw_spin_unlock+0x59/0x250 [ 15.292577][ T178] alloc_buf.isra.0+0x4b/0x260 [ 15.292581][ T178] put_chars+0x1e1/0x2f0 [ 15.292584][ T178] ? __send_to_port+0x420/0x420 [ 15.292586][ T178] ? printk_get_next_message+0x2fe/0x7d0 [ 15.292590][ T178] ? rcu_read_lock_any_held+0x3c/0x90 [ 15.292594][ T178] ? validate_chain+0x38b/0xc20 [ 15.292598][ T178] hvc_console_print+0x292/0x780 [ 15.292602][ T178] ? __lock_acquire+0x518/0xc20 [ 15.292604][ T178] ? __lock_acquire+0x518/0xc20 [ 15.292608][ T178] ? hvc_write+0x3a0/0x3a0 [ 15.292612][ T178] ? rcu_is_watching+0x16/0xd0 [ 15.292614][ T178] ? lock_acquire+0x13c/0x160 [ 15.292618][ T178] console_emit_next_record+0x252/0x4f0 [ 15.292623][ T178] ? devkmsg_read+0x4e0/0x4e0 [ 15.292627][ T178] ? rcu_is_watching+0x16/0xd0 [ 15.292629][ T178] ? lock_acquire+0x13c/0x160 [ 15.292633][ T178] console_flush_one_record+0x46f/0x710 [ 15.292638][ T178] ? console_emit_next_record+0x4f0/0x4f0 [ 15.292640][ T178] ? __lock_acquire+0x518/0xc20 [ 15.292645][ T178] console_unlock+0xee/0x1f0 [ 15.292648][ T178] ? console_flush_one_record+0x710/0x710 [ 15.292650][ T178] ? rcu_is_watching+0x16/0xd0 [ 15.292652][ T178] ? lock_acquire+0x60/0x160 [ 15.292656][ T178] ? __down_trylock_console_sem+0x5e/0xa0 [ 15.292658][ T178] ? vprintk_emit+0x320/0x3e0 [ 15.292661][ T178] vprintk_emit+0x37c/0x3e0 [ 15.292664][ T178] ? wake_up_klogd_work_func+0x90/0x90 [ 15.292667][ T178] ? __lock_acquire+0x518/0xc20 [ 15.292671][ T178] _printk+0xc7/0x100 [ 15.292674][ T178] ? snapshot_read.cold+0x21/0x21 [ 15.292677][ T178] ? do_raw_spin_lock+0x131/0x280 [ 15.292680][ T178] ? __rwlock_init+0x150/0x150 [ 15.292684][ T178] ? do_raw_spin_lock+0x131/0x280 [ 15.292687][ T178] do_exit.cold+0x82/0x9c [ 15.292691][ T178] ? exit_notify+0x890/0x890 [ 15.292693][ T178] ? __lock_release.isra.0+0x69/0x1a0 [ 15.292696][ T178] ? rcu_is_watching+0x16/0xd0 [ 15.292700][ T178] do_group_exit+0xb8/0x370 [ 15.292703][ T178] __x64_sys_exit_group+0x3c/0x50 [ 15.292705][ T178] x64_sys_call+0x1567/0x1570 [ 15.292707][ T178] do_syscall_64+0xff/0x530 [ 15.292711][ T178] ? exc_page_fault+0xee/0x100 [ 15.292714][ T178] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 15.292716][ T178] RIP: 0033:0x7f7ae4a3f1b8 [ 15.292719][ T178] Code: Unable to access opcode bytes at 0x7f7ae4a3f18e. [ 15.292720][ T178] RSP: 002b:00007ffeb872c828 EFLAGS: 00000256 ORIG_RAX: 00000000000000e7 [ 15.292723][ T178] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7ae4a3f1b8 [ 15.292724][ T178] RDX: 0000000000000000 RSI: fffffffffffffe90 RDI: 0000000000000000 [ 15.292725][ T178] RBP: 00007ffeb872c9b0 R08: 000055b818168148 R09: 0000000000000000 [ 15.292726][ T178] R10: 0000000000000000 R11: 0000000000000256 R12: 0000000000000000 [ 15.292727][ T178] R13: 00007f7ae429d050 R14: 00007f7ae4f70d9e R15: 000055b81814e6a0 [ 15.292734][ T178]