[ 13.471443][ T91] (udev-worker) (91) used greatest stack depth: 22696 bytes left [ 13.471460][ T91] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 13.471462][ T91] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 91, name: (udev-worker) [ 13.471464][ T91] preempt_count: 2, expected: 0 [ 13.471465][ T91] RCU nest depth: 0, expected: 0 [ 13.471466][ T91] locks held by (udev-worker)/91: 5, last CPU#3: [ 13.471469][ T91] #0: ffffffffab6027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0 [ 13.471481][ T91] #1: ffffffffab799dc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 13.471487][ T91] #2: ffffffffab799e38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 13.471491][ T91] #3: ffffffffab689760 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 13.471495][ T91] #4: ffffffffab689660 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x202/0x4f0 [ 13.471499][ T91] irq event stamp: 307948 [ 13.471500][ T91] hardirqs last enabled at (307947): [] __down_trylock_console_sem+0x86/0xa0 [ 13.471503][ T91] hardirqs last disabled at (307948): [] console_emit_next_record+0x3f8/0x4f0 [ 13.471505][ T91] softirqs last enabled at (307882): [] netlink_release+0x17b/0xcf0 [ 13.471510][ T91] softirqs last disabled at (307880): [] netlink_release+0xd2/0xcf0 [ 13.471512][ T91] Preemption disabled at: [ 13.471513][ T91] [<0000000000000000>] 0x0 [ 13.471520][ T91] CPU: 3 UID: 0 PID: 91 Comm: (udev-worker) Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 13.471524][ T91] Tainted: [W]=WARN [ 13.471525][ T91] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 13.471527][ T91] Call Trace: [ 13.471528][ T91] [ 13.471530][ T91] dump_stack_lvl+0x6f/0xa0 [ 13.471536][ T91] __might_resched.cold+0x1fe/0x2c1 [ 13.471541][ T91] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 13.471545][ T91] ? __kmalloc_noprof+0xdb/0x760 [ 13.471550][ T91] __kmalloc_noprof+0x443/0x760 [ 13.471553][ T91] ? alloc_buf.isra.0+0x4b/0x260 [ 13.471559][ T91] ? do_raw_spin_unlock+0x59/0x250 [ 13.471562][ T91] alloc_buf.isra.0+0x4b/0x260 [ 13.471566][ T91] put_chars+0x1e1/0x2f0 [ 13.471569][ T91] ? __send_to_port+0x420/0x420 [ 13.471572][ T91] ? printk_get_next_message+0x2fe/0x7d0 [ 13.471575][ T91] ? rcu_read_lock_any_held+0x3c/0x90 [ 13.471578][ T91] ? validate_chain+0x38b/0xc20 [ 13.471583][ T91] hvc_console_print+0x292/0x780 [ 13.471587][ T91] ? __lock_acquire+0x518/0xc20 [ 13.471588][ T91] ? __lock_acquire+0x518/0xc20 [ 13.471593][ T91] ? hvc_write+0x3a0/0x3a0 [ 13.471596][ T91] ? rcu_is_watching+0x16/0xd0 [ 13.471600][ T91] ? lock_acquire+0x13c/0x160 [ 13.471604][ T91] console_emit_next_record+0x252/0x4f0 [ 13.471608][ T91] ? devkmsg_read+0x4e0/0x4e0 [ 13.471613][ T91] ? rcu_is_watching+0x16/0xd0 [ 13.471615][ T91] ? lock_acquire+0x13c/0x160 [ 13.471619][ T91] console_flush_one_record+0x46f/0x710 [ 13.471623][ T91] ? console_emit_next_record+0x4f0/0x4f0 [ 13.471625][ T91] ? __lock_acquire+0x518/0xc20 [ 13.471630][ T91] console_unlock+0xee/0x1f0 [ 13.471633][ T91] ? console_flush_one_record+0x710/0x710 [ 13.471635][ T91] ? rcu_is_watching+0x16/0xd0 [ 13.471637][ T91] ? lock_acquire+0xa0/0x160 [ 13.471641][ T91] ? __down_trylock_console_sem+0x5e/0xa0 [ 13.471643][ T91] ? vprintk_emit+0x320/0x3e0 [ 13.471646][ T91] vprintk_emit+0x37c/0x3e0 [ 13.471650][ T91] ? wake_up_klogd_work_func+0x90/0x90 [ 13.471654][ T91] ? __lock_acquire+0x518/0xc20 [ 13.471657][ T91] _printk+0xc7/0x100 [ 13.471661][ T91] ? snapshot_read.cold+0x21/0x21 [ 13.471664][ T91] ? do_raw_spin_lock+0x131/0x280 [ 13.471666][ T91] ? __rwlock_init+0x150/0x150 [ 13.471670][ T91] ? do_raw_spin_lock+0x131/0x280 [ 13.471673][ T91] do_exit.cold+0x82/0x9c [ 13.471677][ T91] ? exit_notify+0x890/0x890 [ 13.471678][ T91] ? __lock_release.isra.0+0x69/0x1a0 [ 13.471681][ T91] ? rcu_is_watching+0x16/0xd0 [ 13.471685][ T91] do_group_exit+0xb8/0x370 [ 13.471688][ T91] __x64_sys_exit_group+0x3c/0x50 [ 13.471690][ T91] x64_sys_call+0x1567/0x1570 [ 13.471692][ T91] do_syscall_64+0xff/0x530 [ 13.471696][ T91] ? exc_page_fault+0xee/0x100 [ 13.471699][ T91] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 13.471701][ T91] RIP: 0033:0x7f351b1681b8 [ 13.471704][ T91] Code: Unable to access opcode bytes at 0x7f351b16818e. [ 13.471705][ T91] RSP: 002b:00007ffd50422068 EFLAGS: 00000256 ORIG_RAX: 00000000000000e7 [ 13.471707][ T91] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f351b1681b8 [ 13.471709][ T91] RDX: 0000000000000000 RSI: fffffffffffffe90 RDI: 0000000000000000 [ 13.471710][ T91] RBP: 00007ffd504221f0 R08: 0000563a541d2478 R09: 0000000000000000 [ 13.471711][ T91] R10: 0000000000000000 R11: 0000000000000256 R12: 0000000000000000 [ 13.471711][ T91] R13: 00007f351a9c6050 R14: 00007f351b699d9e R15: 0000563a54036ce0 [ 13.471718][ T91]