[ 13.156914][ T188] perl (188) used greatest stack depth: 24688 bytes left [ 13.156935][ T188] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 13.156938][ T188] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 188, name: perl [ 13.156940][ T188] preempt_count: 2, expected: 0 [ 13.156940][ T188] RCU nest depth: 0, expected: 0 [ 13.156941][ T188] locks held by perl/188: 5, last CPU#1: [ 13.156943][ T188] #0: ffffffffbc8167b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0 [ 13.156955][ T188] #1: ffffffffbc97ddc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 13.156959][ T188] #2: ffffffffbc97de38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 13.156964][ T188] #3: ffffffffbc89d760 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 13.156968][ T188] #4: ffffffffbc89d660 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x1df/0x4c0 [ 13.156972][ T188] irq event stamp: 678350 [ 13.156973][ T188] hardirqs last enabled at (678349): [] __down_trylock_console_sem+0x86/0xa0 [ 13.156976][ T188] hardirqs last disabled at (678350): [] console_emit_next_record+0x3d4/0x4c0 [ 13.156979][ T188] softirqs last enabled at (677552): [] handle_softirqs+0x67c/0x900 [ 13.156981][ T188] softirqs last disabled at (677543): [] __irq_exit_rcu+0x145/0x1c0 [ 13.156983][ T188] Preemption disabled at: [ 13.156984][ T188] [<0000000000000000>] 0x0 [ 13.156991][ T188] CPU: 1 UID: 0 PID: 188 Comm: perl Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 13.156995][ T188] Tainted: [W]=WARN [ 13.156996][ T188] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 13.156997][ T188] Call Trace: [ 13.156999][ T188] [ 13.157000][ T188] dump_stack_lvl+0x6f/0xa0 [ 13.157007][ T188] __might_resched.cold+0x1fe/0x2c1 [ 13.157011][ T188] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 13.157015][ T188] ? __kmalloc_noprof+0xdb/0x760 [ 13.157020][ T188] __kmalloc_noprof+0x443/0x760 [ 13.157022][ T188] ? alloc_buf.isra.0+0x4b/0x260 [ 13.157029][ T188] ? do_raw_spin_unlock+0x59/0x250 [ 13.157032][ T188] alloc_buf.isra.0+0x4b/0x260 [ 13.157035][ T188] put_chars+0x1e1/0x2f0 [ 13.157038][ T188] ? __send_to_port+0x420/0x420 [ 13.157039][ T188] ? rcu_lockdep_current_cpu_online+0x3f/0x1b0 [ 13.157043][ T188] ? validate_chain+0x38b/0xc20 [ 13.157049][ T188] hvc_console_print+0x292/0x780 [ 13.157057][ T188] ? hvc_write+0x3a0/0x3a0 [ 13.157059][ T188] ? rcu_is_watching+0x16/0xd0 [ 13.157061][ T188] ? lock_acquire+0x13c/0x160 [ 13.157066][ T188] console_emit_next_record+0x22f/0x4c0 [ 13.157070][ T188] ? devkmsg_read+0x4b0/0x4b0 [ 13.157072][ T188] ? console_flush_one_record+0x106/0x710 [ 13.157075][ T188] ? rcu_is_watching+0x16/0xd0 [ 13.157077][ T188] ? lock_acquire+0x13c/0x160 [ 13.157081][ T188] console_flush_one_record+0x46f/0x710 [ 13.157085][ T188] ? console_emit_next_record+0x4c0/0x4c0 [ 13.157087][ T188] ? __lock_acquire+0x518/0xc20 [ 13.157093][ T188] console_unlock+0xee/0x1f0 [ 13.157096][ T188] ? console_flush_one_record+0x710/0x710 [ 13.157098][ T188] ? rcu_is_watching+0x16/0xd0 [ 13.157100][ T188] ? lock_acquire+0xe0/0x160 [ 13.157103][ T188] ? __down_trylock_console_sem+0x5e/0xa0 [ 13.157105][ T188] ? vprintk_emit+0x320/0x3e0 [ 13.157108][ T188] vprintk_emit+0x37c/0x3e0 [ 13.157111][ T188] ? wake_up_klogd_work_func+0x90/0x90 [ 13.157114][ T188] ? __lock_acquire+0x518/0xc20 [ 13.157118][ T188] _printk+0xc7/0x100 [ 13.157122][ T188] ? snapshot_read.cold+0x21/0x21 [ 13.157125][ T188] ? do_raw_spin_lock+0x131/0x280 [ 13.157127][ T188] ? __rwlock_init+0x150/0x150 [ 13.157131][ T188] ? do_raw_spin_lock+0x131/0x280 [ 13.157134][ T188] do_exit.cold+0x82/0x9c [ 13.157138][ T188] ? exit_notify+0x890/0x890 [ 13.157140][ T188] ? __lock_release.isra.0+0x69/0x1a0 [ 13.157143][ T188] ? rcu_is_watching+0x16/0xd0 [ 13.157146][ T188] do_group_exit+0xb8/0x370 [ 13.157149][ T188] __x64_sys_exit_group+0x3c/0x50 [ 13.157151][ T188] x64_sys_call+0x1567/0x1570 [ 13.157154][ T188] do_syscall_64+0xff/0x530 [ 13.157158][ T188] ? exc_page_fault+0xee/0x100 [ 13.157161][ T188] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 13.157164][ T188] RIP: 0033:0x7f14e238a1b8 [ 13.157166][ T188] Code: Unable to access opcode bytes at 0x7f14e238a18e. [ 13.157167][ T188] RSP: 002b:00007fff443e2b68 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 13.157169][ T188] RAX: ffffffffffffffda RBX: 00007f14e24baf88 RCX: 00007f14e238a1b8 [ 13.157171][ T188] RDX: 00007f14e2178cc8 RSI: ffffffffffffffa8 RDI: 0000000000000000 [ 13.157172][ T188] RBP: 00007fff443e2bc0 R08: 0000000000000000 R09: 0000000000000050 [ 13.157173][ T188] R10: 00007fff443e29c0 R11: 0000000000000246 R12: 0000000000000001 [ 13.157173][ T188] R13: 0000000000000000 R14: 00007f14e24b9680 R15: 00007f14e24bafa0 [ 13.157180][ T188]