[ 10.885840][ T154] perl (154) used greatest stack depth: 24640 bytes left [ 10.885856][ T154] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 10.885858][ T154] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 154, name: perl [ 10.885860][ T154] preempt_count: 2, expected: 0 [ 10.885861][ T154] RCU nest depth: 0, expected: 0 [ 10.885862][ T154] locks held by perl/154: 5, last CPU#2: [ 10.885864][ T154] #0: ffffffffa46027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0 [ 10.885876][ T154] #1: ffffffffa4769cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 10.885880][ T154] #2: ffffffffa4769d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 10.885884][ T154] #3: ffffffffa4689660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 10.885887][ T154] #4: ffffffffa4689560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x1df/0x4c0 [ 10.885890][ T154] irq event stamp: 80136 [ 10.885891][ T154] hardirqs last enabled at (80135): [] __down_trylock_console_sem+0x86/0xa0 [ 10.885894][ T154] hardirqs last disabled at (80136): [] console_emit_next_record+0x3d4/0x4c0 [ 10.885896][ T154] softirqs last enabled at (78466): [] handle_softirqs+0x67c/0x900 [ 10.885898][ T154] softirqs last disabled at (78425): [] __irq_exit_rcu+0x145/0x1c0 [ 10.885900][ T154] Preemption disabled at: [ 10.885901][ T154] [<0000000000000000>] 0x0 [ 10.885907][ T154] CPU: 2 UID: 0 PID: 154 Comm: perl Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 10.885911][ T154] Tainted: [W]=WARN [ 10.885911][ T154] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 10.885913][ T154] Call Trace: [ 10.885915][ T154] [ 10.885916][ T154] dump_stack_lvl+0x6f/0xa0 [ 10.885921][ T154] __might_resched.cold+0x1fe/0x2c1 [ 10.885925][ T154] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 10.885929][ T154] ? __kmalloc_noprof+0xdb/0x760 [ 10.885934][ T154] __kmalloc_noprof+0x443/0x760 [ 10.885937][ T154] ? alloc_buf.isra.0+0x4b/0x260 [ 10.885942][ T154] ? do_raw_spin_unlock+0x59/0x250 [ 10.885945][ T154] alloc_buf.isra.0+0x4b/0x260 [ 10.885948][ T154] put_chars+0x1e1/0x2f0 [ 10.885951][ T154] ? __send_to_port+0x420/0x420 [ 10.885953][ T154] ? rcu_lockdep_current_cpu_online+0x3f/0x1b0 [ 10.885957][ T154] ? validate_chain+0x38b/0xc20 [ 10.885962][ T154] hvc_console_print+0x292/0x780 [ 10.885969][ T154] ? hvc_write+0x3a0/0x3a0 [ 10.885971][ T154] ? rcu_is_watching+0x16/0xd0 [ 10.885973][ T154] ? lock_acquire+0x13c/0x160 [ 10.885977][ T154] console_emit_next_record+0x22f/0x4c0 [ 10.885980][ T154] ? devkmsg_read+0x4b0/0x4b0 [ 10.885981][ T154] ? console_flush_one_record+0x106/0x710 [ 10.885984][ T154] ? rcu_is_watching+0x16/0xd0 [ 10.885986][ T154] ? lock_acquire+0x13c/0x160 [ 10.885989][ T154] console_flush_one_record+0x46f/0x710 [ 10.885993][ T154] ? console_emit_next_record+0x4c0/0x4c0 [ 10.885994][ T154] ? __lock_acquire+0x518/0xc20 [ 10.885999][ T154] console_unlock+0xee/0x1f0 [ 10.886001][ T154] ? console_flush_one_record+0x710/0x710 [ 10.886003][ T154] ? rcu_is_watching+0x16/0xd0 [ 10.886004][ T154] ? lock_acquire+0x60/0x160 [ 10.886008][ T154] ? __down_trylock_console_sem+0x5e/0xa0 [ 10.886010][ T154] ? vprintk_emit+0x320/0x3e0 [ 10.886013][ T154] vprintk_emit+0x37c/0x3e0 [ 10.886016][ T154] ? wake_up_klogd_work_func+0x90/0x90 [ 10.886019][ T154] ? __lock_acquire+0x518/0xc20 [ 10.886022][ T154] _printk+0xc7/0x100 [ 10.886026][ T154] ? snapshot_read.cold+0x21/0x21 [ 10.886029][ T154] ? do_raw_spin_lock+0x131/0x280 [ 10.886031][ T154] ? __rwlock_init+0x150/0x150 [ 10.886035][ T154] ? do_raw_spin_lock+0x131/0x280 [ 10.886038][ T154] do_exit.cold+0x82/0x9c [ 10.886041][ T154] ? exit_notify+0x890/0x890 [ 10.886043][ T154] ? __lock_release.isra.0+0x69/0x1a0 [ 10.886045][ T154] ? rcu_is_watching+0x16/0xd0 [ 10.886049][ T154] do_group_exit+0xb8/0x370 [ 10.886052][ T154] __x64_sys_exit_group+0x3c/0x50 [ 10.886054][ T154] x64_sys_call+0x1567/0x1570 [ 10.886056][ T154] do_syscall_64+0xff/0x530 [ 10.886060][ T154] ? exc_page_fault+0xee/0x100 [ 10.886063][ T154] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 10.886065][ T154] RIP: 0033:0x7fcb637281b8 [ 10.886067][ T154] Code: Unable to access opcode bytes at 0x7fcb6372818e. [ 10.886068][ T154] RSP: 002b:00007fff37a86768 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 10.886070][ T154] RAX: ffffffffffffffda RBX: 00007fcb63858f88 RCX: 00007fcb637281b8 [ 10.886071][ T154] RDX: 00007fcb63516cc8 RSI: ffffffffffffffa8 RDI: 0000000000000000 [ 10.886072][ T154] RBP: 00007fff37a867c0 R08: 0000000000000000 R09: 0000000000000050 [ 10.886073][ T154] R10: 00007fff37a865c0 R11: 0000000000000246 R12: 0000000000000001 [ 10.886074][ T154] R13: 0000000000000000 R14: 00007fcb63857680 R15: 00007fcb63858fa0 [ 10.886080][ T154]