======================================
| [   11.536401][  T198] softirqs last disabled at (4125619): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   11.536403][  T198] Preemption disabled at:
| [   11.536404][  T198] 0x0
| [   11.536414][  T198] Tainted: [W]=WARN
[   11.536415][  T198] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   11.536417][  T198] Call Trace:
[   11.536418][  T198]  <TASK>
[   11.536420][  T198]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   11.536425][  T198]  __might_resched.cold (kernel/sched/core.c:9234)
[   11.536430][  T198]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   11.536433][  T198]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   11.536439][  T198]  __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))
[   11.536441][  T198]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   11.536448][  T198]  ? 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)
[   11.536450][  T198]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   11.536454][  T198]  put_chars (drivers/char/virtio_console.c:1176)
[   11.536457][  T198]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   11.536459][  T198]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   11.536463][  T198]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   11.536468][  T198]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   11.536475][  T198]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   11.536478][  T198]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.536479][  T198]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   11.536484][  T198]  console_emit_next_record (kernel/printk/printk.c:3183)
[   11.536487][  T198]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   11.536488][  T198]  ? 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))
[   11.536491][  T198]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.536493][  T198]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   11.536497][  T198]  console_flush_one_record (kernel/printk/printk.c:3268)
[   11.536500][  T198]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   11.536502][  T198]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.536507][  T198]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   11.536509][  T198]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   11.536511][  T198]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.536513][  T198]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   11.536516][  T198]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   11.536518][  T198]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   11.536521][  T198]  vprintk_emit (kernel/printk/printk.c:2479)
[   11.536524][  T198]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   11.536526][  T198]  ? 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)
[   11.536529][  T198]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.536533][  T198]  _printk (kernel/printk/printk.c:2504)
[   11.536537][  T198]  ? snapshot_read.cold (user.c:?)
[   11.536540][  T198]  ? 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)
[   11.536542][  T198]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   11.536546][  T198]  ? 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)
[   11.536549][  T198]  do_exit.cold (kernel/exit.c:889 (discriminator 4) kernel/exit.c:1043 (discriminator 4))
[   11.536553][  T198]  ? exit_notify (kernel/exit.c:780)
[   11.536554][  T198]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   11.536557][  T198]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.536561][  T198]  do_group_exit (kernel/exit.c:1151)
[   11.536564][  T198]  __x64_sys_exit_group (kernel/exit.c:1162 kernel/exit.c:1160 kernel/exit.c:1160)
[   11.536566][  T198]  x64_sys_call (./arch/x86/include/generated/asm/syscalls_64.h:232)
[   11.536569][  T198]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   11.536573][  T198]  ? irq_exit_rcu (kernel/softirq.c:786)
[   11.536576][  T198]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   11.536578][  T198] RIP: 0033:0x479678
[   11.536580][  T198] Code: Unable to access opcode bytes at 0x47964e.

Code starting with the faulting instruction
===========================================
[   11.536581][  T198] RSP: 002b:00007fff15650d28 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   11.536583][  T198] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000479678
[   11.536585][  T198] RDX: 000000000deee708 RSI: fffffffffffffff0 RDI: 0000000000000000
[   11.536586][  T198] RBP: 00007fff15650d80 R08: 0000000000000000 R09: 000000000deef3e0
[   11.536587][  T198] R10: 0000000000000110 R11: 0000000000000246 R12: 00007fff15650eb8


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