======================================
| [   31.344712][  T854] softirqs last disabled at (246919): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   31.344714][  T854] Preemption disabled at:
| [   31.344715][  T854] 0x0
| [   31.344726][  T854] Tainted: [W]=WARN
[   31.344726][  T854] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   31.344728][  T854] Call Trace:
[   31.344729][  T854]  <TASK>
[   31.344731][  T854]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   31.344737][  T854]  __might_resched.cold (kernel/sched/core.c:9234)
[   31.344742][  T854]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   31.344746][  T854]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   31.344750][  T854]  __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))
[   31.344752][  T854]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   31.344758][  T854]  ? 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)
[   31.344761][  T854]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   31.344765][  T854]  put_chars (drivers/char/virtio_console.c:1176)
[   31.344767][  T854]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   31.344768][  T854]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   31.344772][  T854]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   31.344777][  T854]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   31.344785][  T854]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   31.344787][  T854]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   31.344789][  T854]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   31.344793][  T854]  console_emit_next_record (kernel/printk/printk.c:3183)
[   31.344797][  T854]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   31.344799][  T854]  ? 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))
[   31.344802][  T854]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   31.344804][  T854]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   31.344807][  T854]  console_flush_one_record (kernel/printk/printk.c:3268)
[   31.344812][  T854]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   31.344813][  T854]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   31.344819][  T854]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   31.344821][  T854]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   31.344823][  T854]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   31.344825][  T854]  ? lock_acquire (./include/linux/srcutree.h:374 ./include/linux/srcu.h:541 ./include/linux/srcu.h:645 ./include/trace/events/lock.h:23 ./include/trace/events/lock.h:23 kernel/locking/lockdep.c:5871)
[   31.344829][  T854]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   31.344830][  T854]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   31.344833][  T854]  vprintk_emit (kernel/printk/printk.c:2479)
[   31.344836][  T854]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   31.344839][  T854]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   31.344842][  T854]  _printk (kernel/printk/printk.c:2504)
[   31.344846][  T854]  ? snapshot_read.cold (user.c:?)
[   31.344849][  T854]  ? 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)
[   31.344851][  T854]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   31.344855][  T854]  ? 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)
[   31.344858][  T854]  do_exit.cold (kernel/exit.c:889 (discriminator 4) kernel/exit.c:1043 (discriminator 4))
[   31.344861][  T854]  ? exit_notify (kernel/exit.c:780)
[   31.344863][  T854]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   31.344865][  T854]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   31.344869][  T854]  do_group_exit (kernel/exit.c:1151)
[   31.344872][  T854]  __x64_sys_exit_group (kernel/exit.c:1162 kernel/exit.c:1160 kernel/exit.c:1160)
[   31.344873][  T854]  x64_sys_call (./arch/x86/include/generated/asm/syscalls_64.h:232)
[   31.344876][  T854]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   31.344880][  T854]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   31.344883][  T854]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   31.344885][  T854] RIP: 0033:0x7fb00dfd01b8
[   31.344887][  T854] Code: Unable to access opcode bytes at 0x7fb00dfd018e.

Code starting with the faulting instruction
===========================================
[   31.344888][  T854] RSP: 002b:00007ffee30b0868 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7
[   31.344890][  T854] RAX: ffffffffffffffda RBX: 00007fb00ded6000 RCX: 00007fb00dfd01b8
[   31.344892][  T854] RDX: 00007ffee30b0884 RSI: ffffffffffffffb0 RDI: 0000000000000000
[   31.344893][  T854] RBP: 00007ffee30b0884 R08: 00007fb00e100b20 R09: 0000000000000000
[   31.344893][  T854] R10: 0000000000000000 R11: 0000000000000202 R12: 000000000042fbe0


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