[ 18.938149][ T181] (udev-worker) (181) used greatest stack depth: 22696 bytes left [ 18.938175][ T181] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 18.938178][ T181] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 181, name: (udev-worker) [ 18.938180][ T181] preempt_count: 2, expected: 0 [ 18.938181][ T181] RCU nest depth: 0, expected: 0 [ 18.938183][ T181] locks held by (udev-worker)/181: 5, last CPU#3: [ 18.938185][ T181] #0: ffffffff96e027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0 [ 18.938201][ T181] #1: ffffffff96f99cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 18.938208][ T181] #2: ffffffff96f99d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 18.938215][ T181] #3: ffffffff96e89660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 18.938220][ T181] #4: ffffffff96e89560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x202/0x4f0 [ 18.938227][ T181] irq event stamp: 324514 [ 18.938228][ T181] hardirqs last enabled at (324513): [] __down_trylock_console_sem+0x86/0xa0 [ 18.938232][ T181] hardirqs last disabled at (324514): [] console_emit_next_record+0x3f8/0x4f0 [ 18.938235][ T181] softirqs last enabled at (324450): [] netlink_release+0x17b/0xcf0 [ 18.938241][ T181] softirqs last disabled at (324448): [] netlink_release+0xd2/0xcf0 [ 18.938244][ T181] Preemption disabled at: [ 18.938245][ T181] [<0000000000000000>] 0x0 [ 18.938253][ T181] CPU: 3 UID: 0 PID: 181 Comm: (udev-worker) Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 18.938258][ T181] Tainted: [W]=WARN [ 18.938259][ T181] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 18.938262][ T181] Call Trace: [ 18.938264][ T181] [ 18.938266][ T181] dump_stack_lvl+0x6f/0xa0 [ 18.938280][ T181] __might_resched.cold+0x1fe/0x2c1 [ 18.938286][ T181] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 18.938292][ T181] ? __kmalloc_noprof+0xdb/0x760 [ 18.938300][ T181] __kmalloc_noprof+0x443/0x760 [ 18.938304][ T181] ? alloc_buf.isra.0+0x4b/0x260 [ 18.938313][ T181] ? do_raw_spin_unlock+0x59/0x250 [ 18.938317][ T181] alloc_buf.isra.0+0x4b/0x260 [ 18.938323][ T181] put_chars+0x1e1/0x2f0 [ 18.938327][ T181] ? __send_to_port+0x420/0x420 [ 18.938330][ T181] ? printk_get_next_message+0x2fe/0x7d0 [ 18.938336][ T181] ? rcu_read_lock_any_held+0x3c/0x90 [ 18.938341][ T181] ? validate_chain+0x38b/0xc20 [ 18.938349][ T181] hvc_console_print+0x292/0x780 [ 18.938353][ T181] ? __lock_acquire+0x518/0xc20 [ 18.938356][ T181] ? __lock_acquire+0x518/0xc20 [ 18.938364][ T181] ? hvc_write+0x3a0/0x3a0 [ 18.938369][ T181] ? rcu_is_watching+0x16/0xd0 [ 18.938373][ T181] ? lock_acquire+0x13c/0x160 [ 18.938380][ T181] console_emit_next_record+0x252/0x4f0 [ 18.938386][ T181] ? devkmsg_read+0x4e0/0x4e0 [ 18.938394][ T181] ? rcu_is_watching+0x16/0xd0 [ 18.938397][ T181] ? lock_acquire+0x13c/0x160 [ 18.938404][ T181] console_flush_one_record+0x46f/0x710 [ 18.938411][ T181] ? console_emit_next_record+0x4f0/0x4f0 [ 18.938414][ T181] ? __lock_acquire+0x518/0xc20 [ 18.938423][ T181] console_unlock+0xee/0x1f0 [ 18.938427][ T181] ? console_flush_one_record+0x710/0x710 [ 18.938430][ T181] ? rcu_is_watching+0x16/0xd0 [ 18.938433][ T181] ? lock_acquire+0x60/0x160 [ 18.938439][ T181] ? __down_trylock_console_sem+0x5e/0xa0 [ 18.938442][ T181] ? vprintk_emit+0x320/0x3e0 [ 18.938447][ T181] vprintk_emit+0x37c/0x3e0 [ 18.938452][ T181] ? wake_up_klogd_work_func+0x90/0x90 [ 18.938457][ T181] ? __lock_acquire+0x518/0xc20 [ 18.938464][ T181] _printk+0xc7/0x100 [ 18.938469][ T181] ? snapshot_read.cold+0x21/0x21 [ 18.938474][ T181] ? do_raw_spin_lock+0x131/0x280 [ 18.938478][ T181] ? __rwlock_init+0x150/0x150 [ 18.938484][ T181] ? do_raw_spin_lock+0x131/0x280 [ 18.938489][ T181] do_exit.cold+0x82/0x9c [ 18.938495][ T181] ? exit_notify+0x890/0x890 [ 18.938497][ T181] ? __lock_release.isra.0+0x69/0x1a0 [ 18.938502][ T181] ? rcu_is_watching+0x16/0xd0 [ 18.938508][ T181] do_group_exit+0xb8/0x370 [ 18.938513][ T181] __x64_sys_exit_group+0x3c/0x50 [ 18.938516][ T181] x64_sys_call+0x1567/0x1570 [ 18.938520][ T181] do_syscall_64+0xff/0x530 [ 18.938525][ T181] ? exc_page_fault+0xee/0x100 [ 18.938530][ T181] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 18.938533][ T181] RIP: 0033:0x7f31c56c81b8 [ 18.938537][ T181] Code: Unable to access opcode bytes at 0x7f31c56c818e. [ 18.938538][ T181] RSP: 002b:00007ffffa575618 EFLAGS: 00000256 ORIG_RAX: 00000000000000e7 [ 18.938542][ T181] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f31c56c81b8 [ 18.938544][ T181] RDX: 0000000000000000 RSI: fffffffffffffe90 RDI: 0000000000000000 [ 18.938545][ T181] RBP: 00007ffffa5757a0 R08: 000055ba68a72488 R09: 0000000000000000 [ 18.938546][ T181] R10: 0000000000000000 R11: 0000000000000256 R12: 0000000000000000 [ 18.938548][ T181] R13: 00007f31c4f26050 R14: 00007f31c5bf9d9e R15: 000055ba688f6f40 [ 18.938560][ T181]