[ 23.884696][ T181] (udev-worker) (181) used greatest stack depth: 22696 bytes left [ 23.884716][ T181] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 23.884719][ T181] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 181, name: (udev-worker) [ 23.884720][ T181] preempt_count: 2, expected: 0 [ 23.884721][ T181] RCU nest depth: 0, expected: 0 [ 23.884722][ T181] locks held by (udev-worker)/181: 5, last CPU#3: [ 23.884724][ T181] #0: ffffffffbce027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0 [ 23.884736][ T181] #1: ffffffffbcf99cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 23.884742][ T181] #2: ffffffffbcf99d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 23.884746][ T181] #3: ffffffffbce89660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 23.884750][ T181] #4: ffffffffbce89560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x202/0x4f0 [ 23.884755][ T181] irq event stamp: 645426 [ 23.884756][ T181] hardirqs last enabled at (645425): [] __down_trylock_console_sem+0x86/0xa0 [ 23.884759][ T181] hardirqs last disabled at (645426): [] console_emit_next_record+0x3f8/0x4f0 [ 23.884761][ T181] softirqs last enabled at (645328): [] netlink_release+0x17b/0xcf0 [ 23.884766][ T181] softirqs last disabled at (645326): [] netlink_release+0xd2/0xcf0 [ 23.884769][ T181] Preemption disabled at: [ 23.884769][ T181] [<0000000000000000>] 0x0 [ 23.884778][ T181] CPU: 3 UID: 0 PID: 181 Comm: (udev-worker) Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 23.884783][ T181] Tainted: [W]=WARN [ 23.884784][ T181] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 23.884787][ T181] Call Trace: [ 23.884788][ T181] [ 23.884790][ T181] dump_stack_lvl+0x6f/0xa0 [ 23.884797][ T181] __might_resched.cold+0x1fe/0x2c1 [ 23.884802][ T181] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 23.884806][ T181] ? __kmalloc_noprof+0xdb/0x760 [ 23.884812][ T181] __kmalloc_noprof+0x443/0x760 [ 23.884815][ T181] ? alloc_buf.isra.0+0x4b/0x260 [ 23.884821][ T181] ? do_raw_spin_unlock+0x59/0x250 [ 23.884824][ T181] alloc_buf.isra.0+0x4b/0x260 [ 23.884828][ T181] put_chars+0x1e1/0x2f0 [ 23.884831][ T181] ? __send_to_port+0x420/0x420 [ 23.884833][ T181] ? printk_get_next_message+0x2fe/0x7d0 [ 23.884836][ T181] ? rcu_read_lock_any_held+0x3c/0x90 [ 23.884840][ T181] ? validate_chain+0x38b/0xc20 [ 23.884845][ T181] hvc_console_print+0x292/0x780 [ 23.884848][ T181] ? __lock_acquire+0x518/0xc20 [ 23.884852][ T181] ? __lock_acquire+0x518/0xc20 [ 23.884857][ T181] ? hvc_write+0x3a0/0x3a0 [ 23.884860][ T181] ? rcu_is_watching+0x16/0xd0 [ 23.884863][ T181] ? lock_acquire+0x13c/0x160 [ 23.884867][ T181] console_emit_next_record+0x252/0x4f0 [ 23.884871][ T181] ? devkmsg_read+0x4e0/0x4e0 [ 23.884876][ T181] ? rcu_is_watching+0x16/0xd0 [ 23.884878][ T181] ? lock_acquire+0x13c/0x160 [ 23.884882][ T181] console_flush_one_record+0x46f/0x710 [ 23.884887][ T181] ? console_emit_next_record+0x4f0/0x4f0 [ 23.884889][ T181] ? __lock_acquire+0x518/0xc20 [ 23.884894][ T181] console_unlock+0xee/0x1f0 [ 23.884899][ T181] ? console_flush_one_record+0x710/0x710 [ 23.884902][ T181] ? rcu_is_watching+0x16/0xd0 [ 23.884904][ T181] ? lock_acquire+0x60/0x160 [ 23.884909][ T181] ? __down_trylock_console_sem+0x5e/0xa0 [ 23.884910][ T181] ? vprintk_emit+0x320/0x3e0 [ 23.884914][ T181] vprintk_emit+0x37c/0x3e0 [ 23.884917][ T181] ? wake_up_klogd_work_func+0x90/0x90 [ 23.884920][ T181] ? __lock_acquire+0x518/0xc20 [ 23.884924][ T181] _printk+0xc7/0x100 [ 23.884927][ T181] ? snapshot_read.cold+0x21/0x21 [ 23.884930][ T181] ? do_raw_spin_lock+0x131/0x280 [ 23.884933][ T181] ? __rwlock_init+0x150/0x150 [ 23.884937][ T181] ? do_raw_spin_lock+0x131/0x280 [ 23.884940][ T181] do_exit.cold+0x82/0x9c [ 23.884944][ T181] ? exit_notify+0x890/0x890 [ 23.884946][ T181] ? __lock_release.isra.0+0x69/0x1a0 [ 23.884949][ T181] ? rcu_is_watching+0x16/0xd0 [ 23.884952][ T181] do_group_exit+0xb8/0x370 [ 23.884955][ T181] __x64_sys_exit_group+0x3c/0x50 [ 23.884957][ T181] x64_sys_call+0x1567/0x1570 [ 23.884960][ T181] do_syscall_64+0xff/0x530 [ 23.884964][ T181] ? exc_page_fault+0xee/0x100 [ 23.884967][ T181] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 23.884969][ T181] RIP: 0033:0x7f05600da1b8 [ 23.884972][ T181] Code: Unable to access opcode bytes at 0x7f05600da18e. [ 23.884973][ T181] RSP: 002b:00007ffebcdb7d58 EFLAGS: 00000256 ORIG_RAX: 00000000000000e7 [ 23.884976][ T181] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f05600da1b8 [ 23.884977][ T181] RDX: 0000000000000000 RSI: fffffffffffffe90 RDI: 0000000000000000 [ 23.884978][ T181] RBP: 00007ffebcdb7ee0 R08: 0000561f6db49c08 R09: 0000000000000000 [ 23.884979][ T181] R10: 0000000000000000 R11: 0000000000000256 R12: 0000000000000000 [ 23.884980][ T181] R13: 00007f055f938050 R14: 00007f056060bd9e R15: 0000561f6d9e0ed0 [ 23.884987][ T181]