======================================
| [   20.821889][   T44] softirqs last disabled at (19053): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   20.821892][   T44] Preemption disabled at:
| [   20.821892][   T44] vprintk_emit (kernel/printk/printk.c:2471)
| [   20.821901][   T44] Tainted: [W]=WARN
[   20.821902][   T44] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   20.821904][   T44] Call Trace:
[   20.821905][   T44]  <TASK>
[   20.821907][   T44]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   20.821912][   T44]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   20.821914][   T44]  __might_resched.cold (kernel/sched/core.c:9234)
[   20.821919][   T44]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   20.821922][   T44]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   20.821927][   T44]  __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))
[   20.821930][   T44]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   20.821936][   T44]  ? 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)
[   20.821939][   T44]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   20.821942][   T44]  put_chars (drivers/char/virtio_console.c:1176)
[   20.821945][   T44]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   20.821948][   T44]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   20.821954][   T44]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   20.821961][   T44]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   20.821963][   T44]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   20.821967][   T44]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   20.821971][   T44]  console_emit_next_record (kernel/printk/printk.c:3183)
[   20.821975][   T44]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   20.821976][   T44]  ? 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))
[   20.821979][   T44]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   20.821981][   T44]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   20.821985][   T44]  console_flush_one_record (kernel/printk/printk.c:3268)
[   20.821989][   T44]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   20.821990][   T44]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   20.821996][   T44]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   20.821998][   T44]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   20.821999][   T44]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   20.822001][   T44]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   20.822005][   T44]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   20.822007][   T44]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   20.822010][   T44]  vprintk_emit (kernel/printk/printk.c:2479)
[   20.822014][   T44]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   20.822016][   T44]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   20.822021][   T44]  _printk (kernel/printk/printk.c:2504)
[   20.822024][   T44]  ? snapshot_read.cold (user.c:?)
[   20.822026][   T44]  ? ___ratelimit (lib/ratelimit.c:97 (discriminator 3))
[   20.822031][   T44]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   20.822033][   T44]  ? idr_get_free (??:?)
[   20.822035][   T44]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   20.822039][   T44]  kauditd_hold_skb.cold (kernel/audit.c:588 (discriminator 1) kernel/audit.c:623 (discriminator 1))
[   20.822043][   T44]  auditd_reset (kernel/audit.c:715)
[   20.822047][   T44]  kauditd_thread (kernel/audit.c:937)
[   20.822049][   T44]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   20.822051][   T44]  ? auditd_reset (kernel/audit.c:699 (discriminator 8))
[   20.822053][   T44]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   20.822055][   T44]  ? auditd_reset (kernel/audit.c:699 (discriminator 8))
[   20.822057][   T44]  ? finish_wait (./include/linux/list.h:457 (discriminator 5))
[   20.822060][   T44]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:210 (discriminator 6) kernel/locking/spinlock.c:221 (discriminator 6))
[   20.822063][   T44]  ? auditd_reset (kernel/audit.c:699 (discriminator 8))
[   20.822065][   T44]  ? __kthread_parkme (./include/linux/instrumented.h:82 ./include/asm-generic/bitops/instrumented-non-atomic.h:141 kernel/kthread.c:272)
[   20.822070][   T44]  ? auditd_reset (kernel/audit.c:699 (discriminator 8))
[   20.822072][   T44]  kthread (kernel/kthread.c:436)
[   20.822074][   T44]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   20.822078][   T44]  ? kthread_affine_preferred (kernel/kthread.c:857)
[   20.822081][   T44]  ret_from_fork (arch/x86/kernel/process.c:158)
[   20.822085][   T44]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/vdso/vma.c:80 (discriminator 1))
[   20.822089][   T44]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[   20.822092][   T44]  ? kthread_affine_preferred (kernel/kthread.c:857)


Finger prints:
__irq_exit_rcu:vprintk_emit:dump_stack_lvl:__kmalloc_noprof:put_chars