[ 12.332207][ T87] (udev-worker) (87) used greatest stack depth: 22696 bytes left [ 12.332228][ T87] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 12.332230][ T87] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 87, name: (udev-worker) [ 12.332232][ T87] preempt_count: 2, expected: 0 [ 12.332233][ T87] RCU nest depth: 0, expected: 0 [ 12.332234][ T87] locks held by (udev-worker)/87: 5, last CPU#2: [ 12.332236][ T87] #0: ffffffffb26027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0 [ 12.332247][ T87] #1: ffffffffb2799dc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 12.332254][ T87] #2: ffffffffb2799e38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 12.332257][ T87] #3: ffffffffb2689760 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 12.332262][ T87] #4: ffffffffb2689660 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x202/0x4f0 [ 12.332266][ T87] irq event stamp: 441060 [ 12.332267][ T87] hardirqs last enabled at (441059): [] __down_trylock_console_sem+0x86/0xa0 [ 12.332269][ T87] hardirqs last disabled at (441060): [] console_emit_next_record+0x3f8/0x4f0 [ 12.332271][ T87] softirqs last enabled at (440996): [] netlink_release+0x17b/0xcf0 [ 12.332276][ T87] softirqs last disabled at (440994): [] netlink_release+0xd2/0xcf0 [ 12.332278][ T87] Preemption disabled at: [ 12.332279][ T87] [<0000000000000000>] 0x0 [ 12.332286][ T87] CPU: 2 UID: 0 PID: 87 Comm: (udev-worker) Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 12.332290][ T87] Tainted: [W]=WARN [ 12.332290][ T87] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 12.332292][ T87] Call Trace: [ 12.332294][ T87] [ 12.332295][ T87] dump_stack_lvl+0x6f/0xa0 [ 12.332302][ T87] __might_resched.cold+0x1fe/0x2c1 [ 12.332307][ T87] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 12.332311][ T87] ? __kmalloc_noprof+0xdb/0x760 [ 12.332316][ T87] __kmalloc_noprof+0x443/0x760 [ 12.332319][ T87] ? alloc_buf.isra.0+0x4b/0x260 [ 12.332325][ T87] ? do_raw_spin_unlock+0x59/0x250 [ 12.332328][ T87] alloc_buf.isra.0+0x4b/0x260 [ 12.332332][ T87] put_chars+0x1e1/0x2f0 [ 12.332336][ T87] ? __send_to_port+0x420/0x420 [ 12.332338][ T87] ? printk_get_next_message+0x2fe/0x7d0 [ 12.332342][ T87] ? rcu_read_lock_any_held+0x3c/0x90 [ 12.332345][ T87] ? validate_chain+0x38b/0xc20 [ 12.332349][ T87] hvc_console_print+0x292/0x780 [ 12.332353][ T87] ? __lock_acquire+0x518/0xc20 [ 12.332354][ T87] ? __lock_acquire+0x518/0xc20 [ 12.332359][ T87] ? hvc_write+0x3a0/0x3a0 [ 12.332363][ T87] ? rcu_is_watching+0x16/0xd0 [ 12.332366][ T87] ? lock_acquire+0x13c/0x160 [ 12.332370][ T87] console_emit_next_record+0x252/0x4f0 [ 12.332374][ T87] ? devkmsg_read+0x4e0/0x4e0 [ 12.332379][ T87] ? rcu_is_watching+0x16/0xd0 [ 12.332381][ T87] ? lock_acquire+0x13c/0x160 [ 12.332385][ T87] console_flush_one_record+0x46f/0x710 [ 12.332389][ T87] ? console_emit_next_record+0x4f0/0x4f0 [ 12.332391][ T87] ? __lock_acquire+0x518/0xc20 [ 12.332396][ T87] console_unlock+0xee/0x1f0 [ 12.332399][ T87] ? console_flush_one_record+0x710/0x710 [ 12.332401][ T87] ? rcu_is_watching+0x16/0xd0 [ 12.332404][ T87] ? lock_acquire+0xa0/0x160 [ 12.332407][ T87] ? __down_trylock_console_sem+0x5e/0xa0 [ 12.332409][ T87] ? vprintk_emit+0x320/0x3e0 [ 12.332412][ T87] vprintk_emit+0x37c/0x3e0 [ 12.332416][ T87] ? wake_up_klogd_work_func+0x90/0x90 [ 12.332420][ T87] ? __lock_acquire+0x518/0xc20 [ 12.332423][ T87] _printk+0xc7/0x100 [ 12.332427][ T87] ? snapshot_read.cold+0x21/0x21 [ 12.332430][ T87] ? do_raw_spin_lock+0x131/0x280 [ 12.332432][ T87] ? __rwlock_init+0x150/0x150 [ 12.332436][ T87] ? do_raw_spin_lock+0x131/0x280 [ 12.332439][ T87] do_exit.cold+0x82/0x9c [ 12.332443][ T87] ? exit_notify+0x890/0x890 [ 12.332445][ T87] ? __lock_release.isra.0+0x69/0x1a0 [ 12.332447][ T87] ? rcu_is_watching+0x16/0xd0 [ 12.332452][ T87] do_group_exit+0xb8/0x370 [ 12.332455][ T87] __x64_sys_exit_group+0x3c/0x50 [ 12.332456][ T87] x64_sys_call+0x1567/0x1570 [ 12.332458][ T87] do_syscall_64+0xff/0x530 [ 12.332462][ T87] ? exc_page_fault+0xee/0x100 [ 12.332465][ T87] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 12.332468][ T87] RIP: 0033:0x7f78443521b8 [ 12.332470][ T87] Code: Unable to access opcode bytes at 0x7f784435218e. [ 12.332471][ T87] RSP: 002b:00007ffd50fb1c88 EFLAGS: 00000256 ORIG_RAX: 00000000000000e7 [ 12.332473][ T87] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f78443521b8 [ 12.332475][ T87] RDX: 0000000000000000 RSI: fffffffffffffe90 RDI: 0000000000000000 [ 12.332476][ T87] RBP: 00007ffd50fb1e10 R08: 0000559119c208c8 R09: 0000000000000000 [ 12.332477][ T87] R10: 0000000000000000 R11: 0000000000000256 R12: 0000000000000000 [ 12.332477][ T87] R13: 00007f7843bb0050 R14: 00007f7844883d9e R15: 0000559119ab6390 [ 12.332485][ T87]