[ 14.102738][ T87] (udev-worker) (87) used greatest stack depth: 22696 bytes left [ 14.102765][ T87] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 14.102768][ T87] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 87, name: (udev-worker) [ 14.102770][ T87] preempt_count: 2, expected: 0 [ 14.102771][ T87] RCU nest depth: 0, expected: 0 [ 14.102773][ T87] locks held by (udev-worker)/87: 5, last CPU#1: [ 14.102775][ T87] #0: ffffffff894027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0 [ 14.102790][ T87] #1: ffffffff89599dc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 14.102797][ T87] #2: ffffffff89599e38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 14.102804][ T87] #3: ffffffff89489760 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 14.102818][ T87] #4: ffffffff89489660 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x202/0x4f0 [ 14.102825][ T87] irq event stamp: 423946 [ 14.102826][ T87] hardirqs last enabled at (423945): [] __down_trylock_console_sem+0x86/0xa0 [ 14.102830][ T87] hardirqs last disabled at (423946): [] console_emit_next_record+0x3f8/0x4f0 [ 14.102833][ T87] softirqs last enabled at (423880): [] netlink_release+0x17b/0xcf0 [ 14.102839][ T87] softirqs last disabled at (423878): [] netlink_release+0xd2/0xcf0 [ 14.102843][ T87] Preemption disabled at: [ 14.102844][ T87] [<0000000000000000>] 0x0 [ 14.102852][ T87] CPU: 1 UID: 0 PID: 87 Comm: (udev-worker) Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 14.102857][ T87] Tainted: [W]=WARN [ 14.102859][ T87] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 14.102861][ T87] Call Trace: [ 14.102863][ T87] [ 14.102865][ T87] dump_stack_lvl+0x6f/0xa0 [ 14.102874][ T87] __might_resched.cold+0x1fe/0x2c1 [ 14.102880][ T87] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 14.102886][ T87] ? __kmalloc_noprof+0xdb/0x760 [ 14.102893][ T87] __kmalloc_noprof+0x443/0x760 [ 14.102897][ T87] ? alloc_buf.isra.0+0x4b/0x260 [ 14.102906][ T87] ? do_raw_spin_unlock+0x59/0x250 [ 14.102910][ T87] alloc_buf.isra.0+0x4b/0x260 [ 14.102916][ T87] put_chars+0x1e1/0x2f0 [ 14.102921][ T87] ? __send_to_port+0x420/0x420 [ 14.102924][ T87] ? printk_get_next_message+0x2fe/0x7d0 [ 14.102930][ T87] ? rcu_read_lock_any_held+0x3c/0x90 [ 14.102934][ T87] ? validate_chain+0x38b/0xc20 [ 14.102941][ T87] hvc_console_print+0x292/0x780 [ 14.102946][ T87] ? __lock_acquire+0x518/0xc20 [ 14.102949][ T87] ? __lock_acquire+0x518/0xc20 [ 14.102957][ T87] ? hvc_write+0x3a0/0x3a0 [ 14.102963][ T87] ? rcu_is_watching+0x16/0xd0 [ 14.102968][ T87] ? lock_acquire+0x13c/0x160 [ 14.102974][ T87] console_emit_next_record+0x252/0x4f0 [ 14.102980][ T87] ? devkmsg_read+0x4e0/0x4e0 [ 14.102988][ T87] ? rcu_is_watching+0x16/0xd0 [ 14.102992][ T87] ? lock_acquire+0x13c/0x160 [ 14.102998][ T87] console_flush_one_record+0x46f/0x710 [ 14.103005][ T87] ? console_emit_next_record+0x4f0/0x4f0 [ 14.103008][ T87] ? __lock_acquire+0x518/0xc20 [ 14.103017][ T87] console_unlock+0xee/0x1f0 [ 14.103022][ T87] ? console_flush_one_record+0x710/0x710 [ 14.103024][ T87] ? rcu_is_watching+0x16/0xd0 [ 14.103028][ T87] ? lock_acquire+0xa0/0x160 [ 14.103034][ T87] ? __down_trylock_console_sem+0x5e/0xa0 [ 14.103037][ T87] ? vprintk_emit+0x320/0x3e0 [ 14.103042][ T87] vprintk_emit+0x37c/0x3e0 [ 14.103048][ T87] ? wake_up_klogd_work_func+0x90/0x90 [ 14.103054][ T87] ? __lock_acquire+0x518/0xc20 [ 14.103060][ T87] _printk+0xc7/0x100 [ 14.103065][ T87] ? snapshot_read.cold+0x21/0x21 [ 14.103070][ T87] ? do_raw_spin_lock+0x131/0x280 [ 14.103074][ T87] ? __rwlock_init+0x150/0x150 [ 14.103081][ T87] ? do_raw_spin_lock+0x131/0x280 [ 14.103085][ T87] do_exit.cold+0x82/0x9c [ 14.103091][ T87] ? exit_notify+0x890/0x890 [ 14.103093][ T87] ? __lock_release.isra.0+0x69/0x1a0 [ 14.103098][ T87] ? rcu_is_watching+0x16/0xd0 [ 14.103104][ T87] do_group_exit+0xb8/0x370 [ 14.103108][ T87] __x64_sys_exit_group+0x3c/0x50 [ 14.103111][ T87] x64_sys_call+0x1567/0x1570 [ 14.103114][ T87] do_syscall_64+0xff/0x530 [ 14.103118][ T87] ? exc_page_fault+0xee/0x100 [ 14.103123][ T87] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 14.103127][ T87] RIP: 0033:0x7f8cf20b71b8 [ 14.103129][ T87] Code: Unable to access opcode bytes at 0x7f8cf20b718e. [ 14.103131][ T87] RSP: 002b:00007ffe732cce08 EFLAGS: 00000256 ORIG_RAX: 00000000000000e7 [ 14.103134][ T87] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8cf20b71b8 [ 14.103136][ T87] RDX: 0000000000000000 RSI: fffffffffffffe90 RDI: 0000000000000000 [ 14.103138][ T87] RBP: 00007ffe732ccf90 R08: 000055e87baa5548 R09: 0000000000000000 [ 14.103139][ T87] R10: 0000000000000000 R11: 0000000000000256 R12: 0000000000000000 [ 14.103140][ T87] R13: 00007f8cf1915050 R14: 00007f8cf25e8d9e R15: 000055e87b902640 [ 14.103152][ T87]