======================================
| [   11.382397][  T167] softirqs last disabled at (338017): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   11.382399][  T167] Preemption disabled at:
| [   11.382400][  T167] 0x0
| [   11.382410][  T167] Tainted: [W]=WARN
[   11.382411][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   11.382413][  T167] Call Trace:
[   11.382415][  T167]  <TASK>
[   11.382416][  T167]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   11.382422][  T167]  __might_resched.cold (kernel/sched/core.c:9234)
[   11.382427][  T167]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   11.382431][  T167]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   11.382435][  T167]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   11.382438][  T167]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   11.382444][  T167]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   11.382446][  T167]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   11.382450][  T167]  put_chars (drivers/char/virtio_console.c:1176)
[   11.382452][  T167]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   11.382456][  T167]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   11.382460][  T167]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   11.382467][  T167]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   11.382469][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.382474][  T167]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   11.382478][  T167]  console_emit_next_record (kernel/printk/printk.c:3183)
[   11.382482][  T167]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   11.382483][  T167]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[   11.382486][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.382489][  T167]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   11.382493][  T167]  console_flush_one_record (kernel/printk/printk.c:3268)
[   11.382497][  T167]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   11.382498][  T167]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.382503][  T167]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   11.382506][  T167]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   11.382508][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.382510][  T167]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   11.382514][  T167]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   11.382516][  T167]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   11.382519][  T167]  vprintk_emit (kernel/printk/printk.c:2479)
[   11.382523][  T167]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   11.382526][  T167]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.382530][  T167]  _printk (kernel/printk/printk.c:2504)
[   11.382533][  T167]  ? snapshot_read.cold (user.c:?)
[   11.382536][  T167]  ? do_raw_spin_lock (./include/linux/instrumented.h:55 ./include/linux/atomic/atomic-instrumented.h:1301 ./include/asm-generic/qspinlock.h:112 kernel/locking/spinlock_debug.c:116)
[   11.382538][  T167]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   11.382542][  T167]  ? do_raw_spin_lock (./include/linux/instrumented.h:55 ./include/linux/atomic/atomic-instrumented.h:1301 ./include/asm-generic/qspinlock.h:112 kernel/locking/spinlock_debug.c:116)
[   11.382545][  T167]  do_exit.cold (kernel/exit.c:889 (discriminator 4) kernel/exit.c:1043 (discriminator 4))
[   11.382548][  T167]  ? exit_notify (kernel/exit.c:780)
[   11.382550][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   11.382552][  T167]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   11.382554][  T167]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   11.382557][  T167]  do_group_exit (kernel/exit.c:1151)
[   11.382559][  T167]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4427 (discriminator 2))
[   11.382561][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4488)
[   11.382564][  T167]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:219 kernel/locking/spinlock.c:229)
[   11.382566][  T167]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:220 (discriminator 1) kernel/locking/spinlock.c:229 (discriminator 1))
[   11.382568][  T167]  get_signal (kernel/signal.c:3039)
[   11.382576][  T167]  ? ptrace_signal (./include/linux/signal.h:87)
[   11.382581][  T167]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   11.382585][  T167]  ? get_sigframe_size (arch/x86/kernel/signal.c:233)
[   11.382587][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4488)
[   11.382591][  T167]  ? do_futex (kernel/futex/syscalls.c:153 (discriminator 1))
[   11.382594][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.382596][  T167]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   11.382600][  T167]  exit_to_user_mode_loop (kernel/entry/common.c:66 kernel/entry/common.c:101)
[   11.382603][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.382606][  T167]  do_syscall_64 (./include/linux/irq-entry-common.h:207 ./include/linux/irq-entry-common.h:230 ./include/linux/entry-common.h:336 arch/x86/entry/syscall_64.c:89)
[   11.382609][  T167]  ? irq_exit_rcu (kernel/softirq.c:786)
[   11.382611][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   11.382613][  T167] RIP: 0033:0x7f2b7ff03312
[   11.382616][  T167] Code: Unable to access opcode bytes at 0x7f2b7ff032e8.

Code starting with the faulting instruction
===========================================
[   11.382617][  T167] RSP: 002b:00007fff82fd1ea8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
[   11.382619][  T167] RAX: fffffffffffffe00 RBX: 0000000000418460 RCX: 00007f2b7ff03312
[   11.382621][  T167] RDX: 0000000000000017 RSI: 0000000000000189 RDI: 0000000000418484
[   11.382622][  T167] RBP: 00007fff82fd1ed0 R08: 0000000000000000 R09: 00000000ffffffff
[   11.382623][  T167] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000


Finger prints:
__irq_exit_rcu:dump_stack_lvl:__kmalloc_noprof:put_chars:hvc_console_print