======================================
| [   20.874796][  T516] softirqs last disabled at (7643281): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   20.874798][  T516] Preemption disabled at:
| [   20.874799][  T516] 0x0
| [   20.874810][  T516] Tainted: [W]=WARN
[   20.874811][  T516] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   20.874812][  T516] Call Trace:
[   20.874814][  T516]  <TASK>
[   20.874816][  T516]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   20.874822][  T516]  __might_resched.cold (kernel/sched/core.c:9234)
[   20.874826][  T516]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   20.874830][  T516]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   20.874835][  T516]  __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))
[   20.874837][  T516]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   20.874843][  T516]  ? 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)
[   20.874846][  T516]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   20.874849][  T516]  put_chars (drivers/char/virtio_console.c:1176)
[   20.874851][  T516]  ? prb_final_commit (kernel/printk/printk_ringbuffer.c:1842)
[   20.874853][  T516]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   20.874856][  T516]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   20.874861][  T516]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   20.874863][  T516]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   20.874867][  T516]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   20.874870][  T516]  ? mark_usage (kernel/locking/lockdep.c:4690)
[   20.874872][  T516]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   20.874873][  T516]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   20.874877][  T516]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   20.874879][  T516]  ? console_emit_next_record (kernel/printk/printk.c:3095 (discriminator 2) kernel/printk/printk.c:3182 (discriminator 2))
[   20.874882][  T516]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   20.874885][  T516]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   20.874888][  T516]  console_emit_next_record (kernel/printk/printk.c:3183)
[   20.874892][  T516]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   20.874894][  T516]  ? 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))
[   20.874897][  T516]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   20.874899][  T516]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   20.874903][  T516]  console_flush_one_record (kernel/printk/printk.c:3268)
[   20.874907][  T516]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   20.874909][  T516]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   20.874914][  T516]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   20.874916][  T516]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   20.874918][  T516]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   20.874920][  T516]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   20.874924][  T516]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   20.874925][  T516]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   20.874929][  T516]  vprintk_emit (kernel/printk/printk.c:2479)
[   20.874932][  T516]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   20.874936][  T516]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   20.874939][  T516]  _printk (kernel/printk/printk.c:2504)
[   20.874942][  T516]  ? snapshot_read.cold (user.c:?)
[   20.874945][  T516]  ? 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)
[   20.874948][  T516]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   20.874951][  T516]  ? 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)
[   20.874954][  T516]  do_exit.cold (kernel/exit.c:889 (discriminator 4) kernel/exit.c:1043 (discriminator 4))
[   20.874958][  T516]  ? exit_notify (kernel/exit.c:780)
[   20.874963][  T516]  __x64_sys_exit (kernel/exit.c:1118 kernel/exit.c:1116 kernel/exit.c:1116)
[   20.874964][  T516]  x64_sys_call (./arch/x86/include/generated/asm/syscalls_64.h:61)
[   20.874967][  T516]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   20.874971][  T516]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   20.874973][  T516]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   20.874976][  T516] RIP: 0033:0x7f2c30a8fc49
[   20.874978][  T516] Code: Unable to access opcode bytes at 0x7f2c30a8fc1f.

Code starting with the faulting instruction
===========================================
[   20.874979][  T516] RSP: 002b:00007f2c3024ee60 EFLAGS: 00000246 ORIG_RAX: 000000000000003c
[   20.874982][  T516] RAX: ffffffffffffffda RBX: 00007f2c3024f6c0 RCX: 00007f2c30a8fc49
[   20.874983][  T516] RDX: 0000000000000000 RSI: 0000000000801000 RDI: 0000000000000000
[   20.874984][  T516] RBP: 00007f2c3024ef70 R08: 0000000000000001 R09: 00007f2c3024f6c0
[   20.874985][  T516] R10: 0000000000000008 R11: 0000000000000246 R12: 00007f2c2fa4f000


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