[ 18.966249][ T181] (udev-worker) (181) used greatest stack depth: 22696 bytes left [ 18.966272][ T181] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 18.966275][ T181] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 181, name: (udev-worker) [ 18.966277][ T181] preempt_count: 2, expected: 0 [ 18.966277][ T181] RCU nest depth: 0, expected: 0 [ 18.966278][ T181] locks held by (udev-worker)/181: 5, last CPU#2: [ 18.966281][ T181] #0: ffffffffa76027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0 [ 18.966293][ T181] #1: ffffffffa7799cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 18.966298][ T181] #2: ffffffffa7799d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 18.966303][ T181] #3: ffffffffa7689660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 18.966306][ T181] #4: ffffffffa7689560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x202/0x4f0 [ 18.966310][ T181] irq event stamp: 552700 [ 18.966311][ T181] hardirqs last enabled at (552699): [] __down_trylock_console_sem+0x86/0xa0 [ 18.966314][ T181] hardirqs last disabled at (552700): [] console_emit_next_record+0x3f8/0x4f0 [ 18.966315][ T181] softirqs last enabled at (552636): [] netlink_release+0x17b/0xcf0 [ 18.966319][ T181] softirqs last disabled at (552634): [] netlink_release+0xd2/0xcf0 [ 18.966322][ T181] Preemption disabled at: [ 18.966323][ T181] [<0000000000000000>] 0x0 [ 18.966329][ T181] CPU: 2 UID: 0 PID: 181 Comm: (udev-worker) Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 18.966333][ T181] Tainted: [W]=WARN [ 18.966334][ T181] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 18.966335][ T181] Call Trace: [ 18.966337][ T181] [ 18.966339][ T181] dump_stack_lvl+0x6f/0xa0 [ 18.966345][ T181] __might_resched.cold+0x1fe/0x2c1 [ 18.966350][ T181] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 18.966353][ T181] ? __kmalloc_noprof+0xdb/0x760 [ 18.966358][ T181] __kmalloc_noprof+0x443/0x760 [ 18.966360][ T181] ? alloc_buf.isra.0+0x4b/0x260 [ 18.966366][ T181] ? do_raw_spin_unlock+0x59/0x250 [ 18.966368][ T181] alloc_buf.isra.0+0x4b/0x260 [ 18.966371][ T181] put_chars+0x1e1/0x2f0 [ 18.966374][ T181] ? __send_to_port+0x420/0x420 [ 18.966375][ T181] ? printk_get_next_message+0x2fe/0x7d0 [ 18.966378][ T181] ? rcu_read_lock_any_held+0x3c/0x90 [ 18.966381][ T181] ? validate_chain+0x38b/0xc20 [ 18.966385][ T181] hvc_console_print+0x292/0x780 [ 18.966388][ T181] ? __lock_acquire+0x518/0xc20 [ 18.966390][ T181] ? __lock_acquire+0x518/0xc20 [ 18.966394][ T181] ? hvc_write+0x3a0/0x3a0 [ 18.966397][ T181] ? rcu_is_watching+0x16/0xd0 [ 18.966400][ T181] ? lock_acquire+0x13c/0x160 [ 18.966404][ T181] console_emit_next_record+0x252/0x4f0 [ 18.966407][ T181] ? devkmsg_read+0x4e0/0x4e0 [ 18.966411][ T181] ? rcu_is_watching+0x16/0xd0 [ 18.966413][ T181] ? lock_acquire+0x13c/0x160 [ 18.966417][ T181] console_flush_one_record+0x46f/0x710 [ 18.966421][ T181] ? console_emit_next_record+0x4f0/0x4f0 [ 18.966423][ T181] ? __lock_acquire+0x518/0xc20 [ 18.966427][ T181] console_unlock+0xee/0x1f0 [ 18.966430][ T181] ? console_flush_one_record+0x710/0x710 [ 18.966432][ T181] ? rcu_is_watching+0x16/0xd0 [ 18.966434][ T181] ? lock_acquire+0x60/0x160 [ 18.966437][ T181] ? __down_trylock_console_sem+0x5e/0xa0 [ 18.966438][ T181] ? vprintk_emit+0x320/0x3e0 [ 18.966441][ T181] vprintk_emit+0x37c/0x3e0 [ 18.966445][ T181] ? wake_up_klogd_work_func+0x90/0x90 [ 18.966448][ T181] ? __lock_acquire+0x518/0xc20 [ 18.966452][ T181] _printk+0xc7/0x100 [ 18.966455][ T181] ? snapshot_read.cold+0x21/0x21 [ 18.966458][ T181] ? do_raw_spin_lock+0x131/0x280 [ 18.966460][ T181] ? __rwlock_init+0x150/0x150 [ 18.966464][ T181] ? do_raw_spin_lock+0x131/0x280 [ 18.966466][ T181] do_exit.cold+0x82/0x9c [ 18.966470][ T181] ? exit_notify+0x890/0x890 [ 18.966472][ T181] ? __lock_release.isra.0+0x69/0x1a0 [ 18.966474][ T181] ? rcu_is_watching+0x16/0xd0 [ 18.966478][ T181] do_group_exit+0xb8/0x370 [ 18.966482][ T181] __x64_sys_exit_group+0x3c/0x50 [ 18.966484][ T181] x64_sys_call+0x1567/0x1570 [ 18.966486][ T181] do_syscall_64+0xff/0x530 [ 18.966489][ T181] ? irq_exit_rcu+0x1a/0x30 [ 18.966492][ T181] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 18.966495][ T181] RIP: 0033:0x7f07df99c1b8 [ 18.966497][ T181] Code: Unable to access opcode bytes at 0x7f07df99c18e. [ 18.966498][ T181] RSP: 002b:00007ffdf6069638 EFLAGS: 00000256 ORIG_RAX: 00000000000000e7 [ 18.966501][ T181] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f07df99c1b8 [ 18.966502][ T181] RDX: 0000000000000000 RSI: fffffffffffffe90 RDI: 0000000000000000 [ 18.966503][ T181] RBP: 00007ffdf60697c0 R08: 00005609ef5dd978 R09: 0000000000000000 [ 18.966504][ T181] R10: 0000000000000000 R11: 0000000000000256 R12: 0000000000000000 [ 18.966505][ T181] R13: 00007f07df1fa050 R14: 00007f07dfecdd9e R15: 00005609ef467350 [ 18.966512][ T181]