======================================
| [   13.299993][  T290] softirqs last disabled at (56355): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   13.299995][  T290] Preemption disabled at:
| [   13.299996][  T290] 0x0
| [   13.300006][  T290] Tainted: [W]=WARN
[   13.300007][  T290] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   13.300009][  T290] Call Trace:
[   13.300011][  T290]  <TASK>
[   13.300013][  T290]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   13.300019][  T290]  __might_resched.cold (kernel/sched/core.c:9234)
[   13.300023][  T290]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   13.300027][  T290]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   13.300031][  T290]  __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))
[   13.300033][  T290]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   13.300040][  T290]  ? 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)
[   13.300043][  T290]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   13.300046][  T290]  put_chars (drivers/char/virtio_console.c:1176)
[   13.300048][  T290]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   13.300051][  T290]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   13.300056][  T290]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   13.300063][  T290]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   13.300066][  T290]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.300068][  T290]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   13.300072][  T290]  console_emit_next_record (kernel/printk/printk.c:3183)
[   13.300076][  T290]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   13.300078][  T290]  ? 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))
[   13.300081][  T290]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.300082][  T290]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   13.300086][  T290]  console_flush_one_record (kernel/printk/printk.c:3268)
[   13.300090][  T290]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   13.300092][  T290]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   13.300097][  T290]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   13.300100][  T290]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   13.300102][  T290]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.300103][  T290]  ? 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)
[   13.300107][  T290]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   13.300109][  T290]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   13.300111][  T290]  vprintk_emit (kernel/printk/printk.c:2479)
[   13.300114][  T290]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   13.300117][  T290]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   13.300120][  T290]  _printk (kernel/printk/printk.c:2504)
[   13.300124][  T290]  ? snapshot_read.cold (user.c:?)
[   13.300126][  T290]  ? 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)
[   13.300129][  T290]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   13.300133][  T290]  ? 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)
[   13.300135][  T290]  do_exit.cold (kernel/exit.c:889 (discriminator 4) kernel/exit.c:1043 (discriminator 4))
[   13.300139][  T290]  ? exit_notify (kernel/exit.c:780)
[   13.300140][  T290]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   13.300143][  T290]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   13.300144][  T290]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   13.300148][  T290]  do_group_exit (kernel/exit.c:1151)
[   13.300149][  T290]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4427 (discriminator 2))
[   13.300151][  T290]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4488)
[   13.300153][  T290]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:219 kernel/locking/spinlock.c:229)
[   13.300155][  T290]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:220 (discriminator 1) kernel/locking/spinlock.c:229 (discriminator 1))
[   13.300157][  T290]  get_signal (kernel/signal.c:3039)
[   13.300160][  T290]  ? ___sys_sendmsg (net/socket.c:2771)
[   13.300164][  T290]  ? new_sync_write (fs/read_write.c:595)
[   13.300170][  T290]  ? ptrace_signal (./include/linux/signal.h:87)
[   13.300175][  T290]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   13.300180][  T290]  ? get_sigframe_size (arch/x86/kernel/signal.c:233)
[   13.300182][  T290]  ? __sys_recvmsg (net/socket.c:3008)
[   13.300187][  T290]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.300188][  T290]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   13.300192][  T290]  exit_to_user_mode_loop (kernel/entry/common.c:66 kernel/entry/common.c:101)
[   13.300195][  T290]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.300197][  T290]  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)
[   13.300200][  T290]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   13.300203][  T290]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   13.300209][  T290] RIP: 0033:0x7f4a02b1054e
[   13.300211][  T290] Code: Unable to access opcode bytes at 0x7f4a02b10524.

Code starting with the faulting instruction
===========================================
[   13.300212][  T290] RSP: 002b:00007fffc36c9920 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[   13.300214][  T290] RAX: fffffffffffffe00 RBX: 0000000000000024 RCX: 00007f4a02b1054e
[   13.300216][  T290] RDX: 0000000000000000 RSI: 00007fffc36c99b0 RDI: 0000000000000005
[   13.300217][  T290] RBP: 00007fffc36c9930 R08: 0000000000000000 R09: 0000000000000000
[   13.300218][  T290] R10: 0000000000000000 R11: 0000000000000202 R12: 00000000004039d0


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