[ 12.906817][ T87] (udev-worker) (87) used greatest stack depth: 22696 bytes left [ 12.906843][ T87] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 12.906845][ T87] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 87, name: (udev-worker) [ 12.906847][ T87] preempt_count: 2, expected: 0 [ 12.906848][ T87] RCU nest depth: 0, expected: 0 [ 12.906849][ T87] locks held by (udev-worker)/87: 5, last CPU#3: [ 12.906851][ T87] #0: ffffffffb70027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0 [ 12.906863][ T87] #1: ffffffffb7199dc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 12.906868][ T87] #2: ffffffffb7199e38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 12.906872][ T87] #3: ffffffffb7089760 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 12.906876][ T87] #4: ffffffffb7089660 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x202/0x4f0 [ 12.906880][ T87] irq event stamp: 390788 [ 12.906881][ T87] hardirqs last enabled at (390787): [] __down_trylock_console_sem+0x86/0xa0 [ 12.906883][ T87] hardirqs last disabled at (390788): [] console_emit_next_record+0x3f8/0x4f0 [ 12.906885][ T87] softirqs last enabled at (390724): [] netlink_release+0x17b/0xcf0 [ 12.906889][ T87] softirqs last disabled at (390722): [] netlink_release+0xd2/0xcf0 [ 12.906892][ T87] Preemption disabled at: [ 12.906893][ T87] [<0000000000000000>] 0x0 [ 12.906900][ T87] CPU: 3 UID: 0 PID: 87 Comm: (udev-worker) Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 12.906903][ T87] Tainted: [W]=WARN [ 12.906904][ T87] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 12.906906][ T87] Call Trace: [ 12.906907][ T87] [ 12.906909][ T87] dump_stack_lvl+0x6f/0xa0 [ 12.906915][ T87] __might_resched.cold+0x1fe/0x2c1 [ 12.906920][ T87] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 12.906924][ T87] ? __kmalloc_noprof+0xdb/0x760 [ 12.906929][ T87] __kmalloc_noprof+0x443/0x760 [ 12.906931][ T87] ? alloc_buf.isra.0+0x4b/0x260 [ 12.906938][ T87] ? do_raw_spin_unlock+0x59/0x250 [ 12.906940][ T87] alloc_buf.isra.0+0x4b/0x260 [ 12.906944][ T87] put_chars+0x1e1/0x2f0 [ 12.906947][ T87] ? __send_to_port+0x420/0x420 [ 12.906949][ T87] ? printk_get_next_message+0x2fe/0x7d0 [ 12.906953][ T87] ? rcu_read_lock_any_held+0x3c/0x90 [ 12.906956][ T87] ? validate_chain+0x38b/0xc20 [ 12.906960][ T87] hvc_console_print+0x292/0x780 [ 12.906963][ T87] ? __lock_acquire+0x518/0xc20 [ 12.906965][ T87] ? __lock_acquire+0x518/0xc20 [ 12.906969][ T87] ? hvc_write+0x3a0/0x3a0 [ 12.906972][ T87] ? rcu_is_watching+0x16/0xd0 [ 12.906976][ T87] ? lock_acquire+0x13c/0x160 [ 12.906979][ T87] console_emit_next_record+0x252/0x4f0 [ 12.906983][ T87] ? devkmsg_read+0x4e0/0x4e0 [ 12.906987][ T87] ? rcu_is_watching+0x16/0xd0 [ 12.906990][ T87] ? lock_acquire+0x13c/0x160 [ 12.906993][ T87] console_flush_one_record+0x46f/0x710 [ 12.906997][ T87] ? console_emit_next_record+0x4f0/0x4f0 [ 12.906999][ T87] ? __lock_acquire+0x518/0xc20 [ 12.907004][ T87] console_unlock+0xee/0x1f0 [ 12.907007][ T87] ? console_flush_one_record+0x710/0x710 [ 12.907008][ T87] ? rcu_is_watching+0x16/0xd0 [ 12.907011][ T87] ? lock_acquire+0xa0/0x160 [ 12.907014][ T87] ? __down_trylock_console_sem+0x5e/0xa0 [ 12.907016][ T87] ? vprintk_emit+0x320/0x3e0 [ 12.907019][ T87] vprintk_emit+0x37c/0x3e0 [ 12.907023][ T87] ? wake_up_klogd_work_func+0x90/0x90 [ 12.907026][ T87] ? __lock_acquire+0x518/0xc20 [ 12.907030][ T87] _printk+0xc7/0x100 [ 12.907035][ T87] ? snapshot_read.cold+0x21/0x21 [ 12.907038][ T87] ? do_raw_spin_lock+0x131/0x280 [ 12.907040][ T87] ? __rwlock_init+0x150/0x150 [ 12.907044][ T87] ? do_raw_spin_lock+0x131/0x280 [ 12.907046][ T87] do_exit.cold+0x82/0x9c [ 12.907050][ T87] ? exit_notify+0x890/0x890 [ 12.907051][ T87] ? __lock_release.isra.0+0x69/0x1a0 [ 12.907054][ T87] ? rcu_is_watching+0x16/0xd0 [ 12.907058][ T87] do_group_exit+0xb8/0x370 [ 12.907060][ T87] __x64_sys_exit_group+0x3c/0x50 [ 12.907062][ T87] x64_sys_call+0x1567/0x1570 [ 12.907064][ T87] do_syscall_64+0xff/0x530 [ 12.907067][ T87] ? exc_page_fault+0xee/0x100 [ 12.907071][ T87] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 12.907073][ T87] RIP: 0033:0x7f880968a1b8 [ 12.907075][ T87] Code: Unable to access opcode bytes at 0x7f880968a18e. [ 12.907076][ T87] RSP: 002b:00007ffd9d4b1c98 EFLAGS: 00000256 ORIG_RAX: 00000000000000e7 [ 12.907079][ T87] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f880968a1b8 [ 12.907080][ T87] RDX: 0000000000000000 RSI: fffffffffffffe90 RDI: 0000000000000000 [ 12.907081][ T87] RBP: 00007ffd9d4b1e20 R08: 00005640afcc18e8 R09: 0000000000000000 [ 12.907082][ T87] R10: 0000000000000000 R11: 0000000000000256 R12: 0000000000000000 [ 12.907083][ T87] R13: 00007f8808ee8050 R14: 00007f8809bbbd9e R15: 00005640afb67d00 [ 12.907089][ T87]