[ 20.769923][ T196] (udev-worker) (196) used greatest stack depth: 22696 bytes left [ 20.769947][ T196] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 20.769949][ T196] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 196, name: (udev-worker) [ 20.769951][ T196] preempt_count: 2, expected: 0 [ 20.769952][ T196] RCU nest depth: 0, expected: 0 [ 20.769953][ T196] locks held by (udev-worker)/196: 5, last CPU#0: [ 20.769956][ T196] #0: ffffffff9ca167b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0 [ 20.769970][ T196] #1: ffffffff9cb7ddc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 20.769976][ T196] #2: ffffffff9cb7de38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 20.769981][ T196] #3: ffffffff9ca9d760 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 20.769987][ T196] #4: ffffffff9ca9d660 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x1df/0x4c0 [ 20.769992][ T196] irq event stamp: 908962 [ 20.769993][ T196] hardirqs last enabled at (908961): [] __down_trylock_console_sem+0x86/0xa0 [ 20.769997][ T196] hardirqs last disabled at (908962): [] console_emit_next_record+0x3d4/0x4c0 [ 20.770000][ T196] softirqs last enabled at (908892): [] netlink_release+0x17b/0xcf0 [ 20.770004][ T196] softirqs last disabled at (908890): [] netlink_release+0xd2/0xcf0 [ 20.770008][ T196] Preemption disabled at: [ 20.770008][ T196] [<0000000000000000>] 0x0 [ 20.770017][ T196] CPU: 0 UID: 0 PID: 196 Comm: (udev-worker) Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 20.770021][ T196] Tainted: [W]=WARN [ 20.770023][ T196] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 20.770025][ T196] Call Trace: [ 20.770027][ T196] [ 20.770029][ T196] dump_stack_lvl+0x6f/0xa0 [ 20.770037][ T196] __might_resched.cold+0x1fe/0x2c1 [ 20.770043][ T196] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 20.770048][ T196] ? __kmalloc_noprof+0xdb/0x760 [ 20.770054][ T196] __kmalloc_noprof+0x443/0x760 [ 20.770057][ T196] ? alloc_buf.isra.0+0x4b/0x260 [ 20.770066][ T196] ? do_raw_spin_unlock+0x59/0x250 [ 20.770069][ T196] alloc_buf.isra.0+0x4b/0x260 [ 20.770074][ T196] put_chars+0x1e1/0x2f0 [ 20.770077][ T196] ? __send_to_port+0x420/0x420 [ 20.770079][ T196] ? rcu_lockdep_current_cpu_online+0x3f/0x1b0 [ 20.770084][ T196] ? validate_chain+0x38b/0xc20 [ 20.770092][ T196] hvc_console_print+0x292/0x780 [ 20.770102][ T196] ? hvc_write+0x3a0/0x3a0 [ 20.770106][ T196] ? rcu_is_watching+0x16/0xd0 [ 20.770109][ T196] ? lock_acquire+0x13c/0x160 [ 20.770115][ T196] console_emit_next_record+0x22f/0x4c0 [ 20.770120][ T196] ? devkmsg_read+0x4b0/0x4b0 [ 20.770123][ T196] ? console_flush_one_record+0x106/0x710 [ 20.770127][ T196] ? rcu_is_watching+0x16/0xd0 [ 20.770130][ T196] ? lock_acquire+0x13c/0x160 [ 20.770136][ T196] console_flush_one_record+0x46f/0x710 [ 20.770142][ T196] ? console_emit_next_record+0x4c0/0x4c0 [ 20.770145][ T196] ? __lock_acquire+0x518/0xc20 [ 20.770153][ T196] console_unlock+0xee/0x1f0 [ 20.770157][ T196] ? console_flush_one_record+0x710/0x710 [ 20.770159][ T196] ? rcu_is_watching+0x16/0xd0 [ 20.770162][ T196] ? lock_acquire+0xe0/0x160 [ 20.770167][ T196] ? __down_trylock_console_sem+0x5e/0xa0 [ 20.770170][ T196] ? vprintk_emit+0x320/0x3e0 [ 20.770174][ T196] vprintk_emit+0x37c/0x3e0 [ 20.770179][ T196] ? wake_up_klogd_work_func+0x90/0x90 [ 20.770183][ T196] ? __lock_acquire+0x518/0xc20 [ 20.770188][ T196] _printk+0xc7/0x100 [ 20.770193][ T196] ? snapshot_read.cold+0x21/0x21 [ 20.770196][ T196] ? do_raw_spin_lock+0x131/0x280 [ 20.770200][ T196] ? __rwlock_init+0x150/0x150 [ 20.770206][ T196] ? do_raw_spin_lock+0x131/0x280 [ 20.770209][ T196] do_exit.cold+0x82/0x9c [ 20.770214][ T196] ? exit_notify+0x890/0x890 [ 20.770216][ T196] ? __lock_release.isra.0+0x69/0x1a0 [ 20.770220][ T196] ? rcu_is_watching+0x16/0xd0 [ 20.770225][ T196] do_group_exit+0xb8/0x370 [ 20.770230][ T196] __x64_sys_exit_group+0x3c/0x50 [ 20.770232][ T196] x64_sys_call+0x1567/0x1570 [ 20.770236][ T196] do_syscall_64+0xff/0x530 [ 20.770240][ T196] ? exc_page_fault+0xee/0x100 [ 20.770245][ T196] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 20.770248][ T196] RIP: 0033:0x7f0de62951b8 [ 20.770251][ T196] Code: Unable to access opcode bytes at 0x7f0de629518e. [ 20.770252][ T196] RSP: 002b:00007fff7bc60ff8 EFLAGS: 00000256 ORIG_RAX: 00000000000000e7 [ 20.770255][ T196] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f0de62951b8 [ 20.770257][ T196] RDX: 0000000000000000 RSI: fffffffffffffe90 RDI: 0000000000000000 [ 20.770258][ T196] RBP: 00007fff7bc61180 R08: 00005643218cd568 R09: 0000000000000000 [ 20.770259][ T196] R10: 0000000000000000 R11: 0000000000000256 R12: 0000000000000000 [ 20.770260][ T196] R13: 00007f0de5af3050 R14: 00007f0de67c6d9e R15: 0000564321733190 [ 20.770271][ T196]