[ 12.450651][ T90] (udev-worker) (90) used greatest stack depth: 22696 bytes left [ 12.450669][ T90] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 12.450671][ T90] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 90, name: (udev-worker) [ 12.450673][ T90] preempt_count: 2, expected: 0 [ 12.450674][ T90] RCU nest depth: 0, expected: 0 [ 12.450674][ T90] locks held by (udev-worker)/90: 5, last CPU#0: [ 12.450677][ T90] #0: ffffffffb42027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0 [ 12.450689][ T90] #1: ffffffffb4399dc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 12.450695][ T90] #2: ffffffffb4399e38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 12.450699][ T90] #3: ffffffffb4289760 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 12.450704][ T90] #4: ffffffffb4289660 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x202/0x4f0 [ 12.450708][ T90] irq event stamp: 343966 [ 12.450708][ T90] hardirqs last enabled at (343965): [] __down_trylock_console_sem+0x86/0xa0 [ 12.450711][ T90] hardirqs last disabled at (343966): [] console_emit_next_record+0x3f8/0x4f0 [ 12.450713][ T90] softirqs last enabled at (343902): [] netlink_release+0x17b/0xcf0 [ 12.450717][ T90] softirqs last disabled at (343900): [] netlink_release+0xd2/0xcf0 [ 12.450720][ T90] Preemption disabled at: [ 12.450721][ T90] [<0000000000000000>] 0x0 [ 12.450728][ T90] CPU: 0 UID: 0 PID: 90 Comm: (udev-worker) Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 12.450731][ T90] Tainted: [W]=WARN [ 12.450732][ T90] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 12.450734][ T90] Call Trace: [ 12.450736][ T90] [ 12.450737][ T90] dump_stack_lvl+0x6f/0xa0 [ 12.450744][ T90] __might_resched.cold+0x1fe/0x2c1 [ 12.450748][ T90] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 12.450752][ T90] ? __kmalloc_noprof+0xdb/0x760 [ 12.450757][ T90] __kmalloc_noprof+0x443/0x760 [ 12.450760][ T90] ? alloc_buf.isra.0+0x4b/0x260 [ 12.450771][ T90] ? do_raw_spin_unlock+0x59/0x250 [ 12.450774][ T90] alloc_buf.isra.0+0x4b/0x260 [ 12.450778][ T90] put_chars+0x1e1/0x2f0 [ 12.450781][ T90] ? __send_to_port+0x420/0x420 [ 12.450783][ T90] ? printk_get_next_message+0x2fe/0x7d0 [ 12.450787][ T90] ? rcu_read_lock_any_held+0x3c/0x90 [ 12.450790][ T90] ? validate_chain+0x38b/0xc20 [ 12.450794][ T90] hvc_console_print+0x292/0x780 [ 12.450798][ T90] ? __lock_acquire+0x518/0xc20 [ 12.450800][ T90] ? __lock_acquire+0x518/0xc20 [ 12.450805][ T90] ? hvc_write+0x3a0/0x3a0 [ 12.450809][ T90] ? rcu_is_watching+0x16/0xd0 [ 12.450812][ T90] ? lock_acquire+0x13c/0x160 [ 12.450816][ T90] console_emit_next_record+0x252/0x4f0 [ 12.450820][ T90] ? devkmsg_read+0x4e0/0x4e0 [ 12.450825][ T90] ? rcu_is_watching+0x16/0xd0 [ 12.450828][ T90] ? lock_acquire+0x13c/0x160 [ 12.450832][ T90] console_flush_one_record+0x46f/0x710 [ 12.450836][ T90] ? console_emit_next_record+0x4f0/0x4f0 [ 12.450838][ T90] ? __lock_acquire+0x518/0xc20 [ 12.450843][ T90] console_unlock+0xee/0x1f0 [ 12.450846][ T90] ? console_flush_one_record+0x710/0x710 [ 12.450848][ T90] ? rcu_is_watching+0x16/0xd0 [ 12.450851][ T90] ? lock_acquire+0xa0/0x160 [ 12.450854][ T90] ? __down_trylock_console_sem+0x5e/0xa0 [ 12.450856][ T90] ? vprintk_emit+0x320/0x3e0 [ 12.450859][ T90] vprintk_emit+0x37c/0x3e0 [ 12.450863][ T90] ? wake_up_klogd_work_func+0x90/0x90 [ 12.450866][ T90] ? __lock_acquire+0x518/0xc20 [ 12.450870][ T90] _printk+0xc7/0x100 [ 12.450874][ T90] ? snapshot_read.cold+0x21/0x21 [ 12.450876][ T90] ? do_raw_spin_lock+0x131/0x280 [ 12.450879][ T90] ? __rwlock_init+0x150/0x150 [ 12.450883][ T90] ? do_raw_spin_lock+0x131/0x280 [ 12.450885][ T90] do_exit.cold+0x82/0x9c [ 12.450889][ T90] ? exit_notify+0x890/0x890 [ 12.450890][ T90] ? __lock_release.isra.0+0x69/0x1a0 [ 12.450893][ T90] ? rcu_is_watching+0x16/0xd0 [ 12.450897][ T90] do_group_exit+0xb8/0x370 [ 12.450900][ T90] __x64_sys_exit_group+0x3c/0x50 [ 12.450902][ T90] x64_sys_call+0x1567/0x1570 [ 12.450904][ T90] do_syscall_64+0xff/0x530 [ 12.450907][ T90] ? exc_page_fault+0xee/0x100 [ 12.450911][ T90] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 12.450913][ T90] RIP: 0033:0x7f955cb921b8 [ 12.450915][ T90] Code: Unable to access opcode bytes at 0x7f955cb9218e. [ 12.450916][ T90] RSP: 002b:00007ffdd688ea38 EFLAGS: 00000256 ORIG_RAX: 00000000000000e7 [ 12.450919][ T90] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f955cb921b8 [ 12.450920][ T90] RDX: 0000000000000000 RSI: fffffffffffffe90 RDI: 0000000000000000 [ 12.450921][ T90] RBP: 00007ffdd688ebc0 R08: 000055a16716f3d8 R09: 0000000000000000 [ 12.450922][ T90] R10: 0000000000000000 R11: 0000000000000256 R12: 0000000000000000 [ 12.450923][ T90] R13: 00007f955c3f0050 R14: 00007f955d0c3d9e R15: 000055a167005f40 [ 12.450929][ T90]