[ 16.086208][ T178] (udev-worker) (178) used greatest stack depth: 22696 bytes left [ 16.086229][ T178] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 16.086231][ T178] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 178, name: (udev-worker) [ 16.086233][ T178] preempt_count: 2, expected: 0 [ 16.086233][ T178] RCU nest depth: 0, expected: 0 [ 16.086234][ T178] locks held by (udev-worker)/178: 5, last CPU#1: [ 16.086237][ T178] #0: ffffffff954027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0 [ 16.086248][ T178] #1: ffffffff95599cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 16.086254][ T178] #2: ffffffff95599d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 16.086258][ T178] #3: ffffffff95489660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 16.086261][ T178] #4: ffffffff95489560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x202/0x4f0 [ 16.086265][ T178] irq event stamp: 60048 [ 16.086266][ T178] hardirqs last enabled at (60047): [] __down_trylock_console_sem+0x86/0xa0 [ 16.086268][ T178] hardirqs last disabled at (60048): [] console_emit_next_record+0x3f8/0x4f0 [ 16.086270][ T178] softirqs last enabled at (59984): [] netlink_release+0x17b/0xcf0 [ 16.086274][ T178] softirqs last disabled at (59982): [] netlink_release+0xd2/0xcf0 [ 16.086276][ T178] Preemption disabled at: [ 16.086277][ T178] [<0000000000000000>] 0x0 [ 16.086284][ T178] CPU: 1 UID: 0 PID: 178 Comm: (udev-worker) Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 16.086287][ T178] Tainted: [W]=WARN [ 16.086288][ T178] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 16.086291][ T178] Call Trace: [ 16.086292][ T178] [ 16.086294][ T178] dump_stack_lvl+0x6f/0xa0 [ 16.086301][ T178] __might_resched.cold+0x1fe/0x2c1 [ 16.086305][ T178] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 16.086309][ T178] ? __kmalloc_noprof+0xdb/0x760 [ 16.086314][ T178] __kmalloc_noprof+0x443/0x760 [ 16.086316][ T178] ? alloc_buf.isra.0+0x4b/0x260 [ 16.086321][ T178] ? do_raw_spin_unlock+0x59/0x250 [ 16.086323][ T178] alloc_buf.isra.0+0x4b/0x260 [ 16.086326][ T178] put_chars+0x1e1/0x2f0 [ 16.086329][ T178] ? __send_to_port+0x420/0x420 [ 16.086330][ T178] ? printk_get_next_message+0x2fe/0x7d0 [ 16.086334][ T178] ? rcu_read_lock_any_held+0x3c/0x90 [ 16.086337][ T178] ? validate_chain+0x38b/0xc20 [ 16.086341][ T178] hvc_console_print+0x292/0x780 [ 16.086344][ T178] ? __lock_acquire+0x518/0xc20 [ 16.086345][ T178] ? __lock_acquire+0x518/0xc20 [ 16.086349][ T178] ? hvc_write+0x3a0/0x3a0 [ 16.086352][ T178] ? rcu_is_watching+0x16/0xd0 [ 16.086355][ T178] ? lock_acquire+0x13c/0x160 [ 16.086359][ T178] console_emit_next_record+0x252/0x4f0 [ 16.086362][ T178] ? devkmsg_read+0x4e0/0x4e0 [ 16.086366][ T178] ? rcu_is_watching+0x16/0xd0 [ 16.086368][ T178] ? lock_acquire+0x13c/0x160 [ 16.086372][ T178] console_flush_one_record+0x46f/0x710 [ 16.086376][ T178] ? console_emit_next_record+0x4f0/0x4f0 [ 16.086378][ T178] ? __lock_acquire+0x518/0xc20 [ 16.086382][ T178] console_unlock+0xee/0x1f0 [ 16.086385][ T178] ? console_flush_one_record+0x710/0x710 [ 16.086386][ T178] ? rcu_is_watching+0x16/0xd0 [ 16.086388][ T178] ? lock_acquire+0x60/0x160 [ 16.086392][ T178] ? __down_trylock_console_sem+0x5e/0xa0 [ 16.086393][ T178] ? vprintk_emit+0x320/0x3e0 [ 16.086396][ T178] vprintk_emit+0x37c/0x3e0 [ 16.086400][ T178] ? wake_up_klogd_work_func+0x90/0x90 [ 16.086403][ T178] ? __lock_acquire+0x518/0xc20 [ 16.086406][ T178] _printk+0xc7/0x100 [ 16.086410][ T178] ? snapshot_read.cold+0x21/0x21 [ 16.086413][ T178] ? do_raw_spin_lock+0x131/0x280 [ 16.086415][ T178] ? __rwlock_init+0x150/0x150 [ 16.086419][ T178] ? do_raw_spin_lock+0x131/0x280 [ 16.086421][ T178] do_exit.cold+0x82/0x9c [ 16.086425][ T178] ? exit_notify+0x890/0x890 [ 16.086427][ T178] ? __lock_release.isra.0+0x69/0x1a0 [ 16.086429][ T178] ? rcu_is_watching+0x16/0xd0 [ 16.086433][ T178] do_group_exit+0xb8/0x370 [ 16.086436][ T178] __x64_sys_exit_group+0x3c/0x50 [ 16.086439][ T178] x64_sys_call+0x1567/0x1570 [ 16.086441][ T178] do_syscall_64+0xff/0x530 [ 16.086444][ T178] ? exc_page_fault+0xee/0x100 [ 16.086447][ T178] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 16.086450][ T178] RIP: 0033:0x7f545d0341b8 [ 16.086452][ T178] Code: Unable to access opcode bytes at 0x7f545d03418e. [ 16.086453][ T178] RSP: 002b:00007ffd5c222eb8 EFLAGS: 00000256 ORIG_RAX: 00000000000000e7 [ 16.086455][ T178] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f545d0341b8 [ 16.086457][ T178] RDX: 0000000000000000 RSI: fffffffffffffe90 RDI: 0000000000000000 [ 16.086458][ T178] RBP: 00007ffd5c223040 R08: 000055c9097c4598 R09: 0000000000000000 [ 16.086458][ T178] R10: 0000000000000000 R11: 0000000000000256 R12: 0000000000000000 [ 16.086459][ T178] R13: 00007f545c892050 R14: 00007f545d565d9e R15: 000055c909644b50 [ 16.086466][ T178]