[ 15.057724][ T183] (udev-worker) (183) used greatest stack depth: 22696 bytes left [ 15.057743][ T183] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 15.057745][ T183] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 183, name: (udev-worker) [ 15.057747][ T183] preempt_count: 2, expected: 0 [ 15.057748][ T183] RCU nest depth: 0, expected: 0 [ 15.057749][ T183] locks held by (udev-worker)/183: 5, last CPU#3: [ 15.057751][ T183] #0: ffffffffb44027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0 [ 15.057764][ T183] #1: ffffffffb4599cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 15.057769][ T183] #2: ffffffffb4599d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 15.057773][ T183] #3: ffffffffb4489660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 15.057777][ T183] #4: ffffffffb4489560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x202/0x4f0 [ 15.057781][ T183] irq event stamp: 118534 [ 15.057782][ T183] hardirqs last enabled at (118533): [] __down_trylock_console_sem+0x86/0xa0 [ 15.057785][ T183] hardirqs last disabled at (118534): [] console_emit_next_record+0x3f8/0x4f0 [ 15.057787][ T183] softirqs last enabled at (118482): [] handle_softirqs+0x67c/0x900 [ 15.057790][ T183] softirqs last disabled at (118475): [] __irq_exit_rcu+0x145/0x1c0 [ 15.057792][ T183] Preemption disabled at: [ 15.057793][ T183] [<0000000000000000>] 0x0 [ 15.057800][ T183] CPU: 3 UID: 0 PID: 183 Comm: (udev-worker) Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 15.057804][ T183] Tainted: [W]=WARN [ 15.057805][ T183] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 15.057806][ T183] Call Trace: [ 15.057808][ T183] [ 15.057810][ T183] dump_stack_lvl+0x6f/0xa0 [ 15.057816][ T183] __might_resched.cold+0x1fe/0x2c1 [ 15.057821][ T183] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 15.057825][ T183] ? __kmalloc_noprof+0xdb/0x760 [ 15.057831][ T183] __kmalloc_noprof+0x443/0x760 [ 15.057834][ T183] ? alloc_buf.isra.0+0x4b/0x260 [ 15.057841][ T183] ? do_raw_spin_unlock+0x59/0x250 [ 15.057844][ T183] alloc_buf.isra.0+0x4b/0x260 [ 15.057848][ T183] put_chars+0x1e1/0x2f0 [ 15.057851][ T183] ? __send_to_port+0x420/0x420 [ 15.057853][ T183] ? printk_get_next_message+0x2fe/0x7d0 [ 15.057857][ T183] ? rcu_read_lock_any_held+0x3c/0x90 [ 15.057860][ T183] ? validate_chain+0x38b/0xc20 [ 15.057865][ T183] hvc_console_print+0x292/0x780 [ 15.057868][ T183] ? __lock_acquire+0x518/0xc20 [ 15.057870][ T183] ? __lock_acquire+0x518/0xc20 [ 15.057875][ T183] ? hvc_write+0x3a0/0x3a0 [ 15.057878][ T183] ? rcu_is_watching+0x16/0xd0 [ 15.057881][ T183] ? lock_acquire+0x13c/0x160 [ 15.057885][ T183] console_emit_next_record+0x252/0x4f0 [ 15.057889][ T183] ? devkmsg_read+0x4e0/0x4e0 [ 15.057894][ T183] ? rcu_is_watching+0x16/0xd0 [ 15.057896][ T183] ? lock_acquire+0x13c/0x160 [ 15.057900][ T183] console_flush_one_record+0x46f/0x710 [ 15.057904][ T183] ? console_emit_next_record+0x4f0/0x4f0 [ 15.057906][ T183] ? __lock_acquire+0x518/0xc20 [ 15.057912][ T183] console_unlock+0xee/0x1f0 [ 15.057915][ T183] ? console_flush_one_record+0x710/0x710 [ 15.057917][ T183] ? rcu_is_watching+0x16/0xd0 [ 15.057919][ T183] ? lock_acquire+0x60/0x160 [ 15.057923][ T183] ? __down_trylock_console_sem+0x5e/0xa0 [ 15.057925][ T183] ? vprintk_emit+0x320/0x3e0 [ 15.057928][ T183] vprintk_emit+0x37c/0x3e0 [ 15.057931][ T183] ? wake_up_klogd_work_func+0x90/0x90 [ 15.057934][ T183] ? __lock_acquire+0x518/0xc20 [ 15.057938][ T183] _printk+0xc7/0x100 [ 15.057942][ T183] ? snapshot_read.cold+0x21/0x21 [ 15.057944][ T183] ? do_raw_spin_lock+0x131/0x280 [ 15.057947][ T183] ? __rwlock_init+0x150/0x150 [ 15.057951][ T183] ? do_raw_spin_lock+0x131/0x280 [ 15.057954][ T183] do_exit.cold+0x82/0x9c [ 15.057959][ T183] ? exit_notify+0x890/0x890 [ 15.057960][ T183] ? __lock_release.isra.0+0x69/0x1a0 [ 15.057963][ T183] ? rcu_is_watching+0x16/0xd0 [ 15.057967][ T183] do_group_exit+0xb8/0x370 [ 15.057970][ T183] __x64_sys_exit_group+0x3c/0x50 [ 15.057972][ T183] x64_sys_call+0x1567/0x1570 [ 15.057975][ T183] do_syscall_64+0xff/0x530 [ 15.057979][ T183] ? irq_exit_rcu+0x1a/0x30 [ 15.057982][ T183] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 15.057984][ T183] RIP: 0033:0x7f89ff1761b8 [ 15.057986][ T183] Code: Unable to access opcode bytes at 0x7f89ff17618e. [ 15.057987][ T183] RSP: 002b:00007ffcb67d29c8 EFLAGS: 00000256 ORIG_RAX: 00000000000000e7 [ 15.057990][ T183] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f89ff1761b8 [ 15.057991][ T183] RDX: 0000000000000000 RSI: fffffffffffffe90 RDI: 0000000000000000 [ 15.057992][ T183] RBP: 00007ffcb67d2b50 R08: 000056545cd76688 R09: 0000000000000000 [ 15.057993][ T183] R10: 0000000000000000 R11: 0000000000000256 R12: 0000000000000000 [ 15.057994][ T183] R13: 00007f89fe9d4050 R14: 00007f89ff6a7d9e R15: 000056545cd97080 [ 15.058001][ T183]