======================================
| [   17.535555][   T39] softirqs last disabled at (249): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   17.535557][   T39] Preemption disabled at:
| [   17.535558][   T39] vprintk_emit (kernel/printk/printk.c:2471)
| [   17.535569][   T39] Tainted: [W]=WARN
[   17.535570][   T39] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   17.535572][   T39] Workqueue: events_power_efficient phylink_resolve
[   17.535579][   T39] Call Trace:
[   17.535581][   T39]  <TASK>
[   17.535582][   T39]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   17.535588][   T39]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   17.535589][   T39]  __might_resched.cold (kernel/sched/core.c:9234)
[   17.535594][   T39]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   17.535597][   T39]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   17.535600][   T39]  __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))
[   17.535604][   T39]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   17.535614][   T39]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   17.535618][   T39]  ? 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)
[   17.535620][   T39]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   17.535623][   T39]  put_chars (drivers/char/virtio_console.c:1176)
[   17.535625][   T39]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   17.535627][   T39]  ? printk_get_next_message (kernel/printk/printk.c:3072)
[   17.535629][   T39]  ? console_prepend_replay (kernel/printk/printk.c:3005)
[   17.535631][   T39]  ? desc_read (./include/linux/instrumented.h:97 ./include/linux/atomic/atomic-instrumented.h:3223 kernel/printk/printk_ringbuffer.c:552)
[   17.535634][   T39]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   17.535638][   T39]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   17.535640][   T39]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   17.535642][   T39]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   17.535643][   T39]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   17.535645][   T39]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   17.535647][   T39]  console_emit_next_record (kernel/printk/printk.c:3183)
[   17.535650][   T39]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   17.535651][   T39]  ? _prb_read_valid (kernel/printk/printk_ringbuffer.c:1996)
[   17.535653][   T39]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   17.535655][   T39]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   17.535656][   T39]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   17.535658][   T39]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   17.535660][   T39]  ? console_flush_one_record (kernel/printk/printk.c:3247)
[   17.535661][   T39]  console_flush_one_record (kernel/printk/printk.c:3268)
[   17.535663][   T39]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   17.535666][   T39]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   17.535668][   T39]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   17.535669][   T39]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   17.535671][   T39]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   17.535672][   T39]  ? lock_release (./include/trace/events/lock.h:68 (discriminator 22) kernel/locking/lockdep.c:5920 (discriminator 22))
[   17.535674][   T39]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 18) ./include/trace/events/lock.h:23 (discriminator 18) kernel/locking/lockdep.c:5871 (discriminator 18))
[   17.535675][   T39]  ? sync_exp_reset_tree_hotplug (kernel/rcu/tree_exp.h:96)
[   17.535677][   T39]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   17.535679][   T39]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   17.535681][   T39]  vprintk_emit (kernel/printk/printk.c:2479)
[   17.535683][   T39]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   17.535685][   T39]  ? wakeup_preempt_fair (kernel/sched/fair.c:1142 kernel/sched/fair.c:10033)
[   17.535688][   T39]  dev_vprintk_emit (drivers/base/core.c:5000)
[   17.535693][   T39]  ? device_rename.cold (drivers/base/core.c:4612 (discriminator 13))
[   17.535694][   T39]  ? trace_sched_wakeup (./include/trace/events/sched.h:178 (discriminator 22))
[   17.535696][   T39]  ? _raw_spin_unlock_irq_enable (./include/linux/spinlock_api_smp.h:229 (discriminator 1) kernel/locking/spinlock.c:237 (discriminator 1))
[   17.535698][   T39]  ? try_to_wake_up (./include/linux/preempt.h:500 (discriminator 1) kernel/sched/core.c:4263 (discriminator 1))
[   17.535701][   T39]  dev_printk_emit (drivers/base/core.c:5011)
[   17.535703][   T39]  ? dev_vprintk_emit (drivers/base/core.c:5001)
[   17.535704][   T39]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   17.535706][   T39]  ? __virt_addr_valid (./include/linux/rcupdate.h:948 ./include/linux/mmzone.h:2276 arch/x86/mm/physaddr.c:54)
[   17.535713][   T39]  ? __virt_addr_valid (./include/linux/rcupdate.h:974 (discriminator 1) ./include/linux/mmzone.h:2286 (discriminator 1) arch/x86/mm/physaddr.c:54 (discriminator 1))
[   17.535714][   T39]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   17.535716][   T39]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   17.535718][   T39]  __netdev_printk (net/core/dev.c:13140 (discriminator 4))
[   17.535722][   T39]  netdev_printk (net/core/dev.c:13166)
[   17.535724][   T39]  ? __netdev_printk (net/core/dev.c:13151 (discriminator 1))
[   17.535726][   T39]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   17.535728][   T39]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   17.535731][   T39]  ? fbnic_mac_link_down_asic (drivers/net/ethernet/meta/fbnic/fbnic_mac.c:708)
[   17.535734][   T39]  ? trace_hardirqs_on (kernel/trace/trace_preemptirq.c:78)
[   17.535735][   T39]  ? fbnic_phylink_mac_link_down (drivers/net/ethernet/meta/fbnic/fbnic_phylink.c:156)
[   17.535737][   T39]  phylink_resolve (drivers/net/phy/phylink.c:1720)
[   17.535739][   T39]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:211 (discriminator 1) kernel/locking/spinlock.c:221 (discriminator 1))
[   17.535741][   T39]  ? debug_object_deactivate (lib/debugobjects.c:946)
[   17.535744][   T39]  ? phylink_ethtool_ksettings_set (drivers/net/phy/phylink.c:189 (discriminator 1))
[   17.535746][   T39]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   17.535748][   T39]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   17.535749][   T39]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   17.535751][   T39]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   17.535753][   T39]  process_one_work (kernel/workqueue.c:3387)
[   17.535757][   T39]  ? __queue_delayed_work (kernel/workqueue.c:2622)
[   17.535759][   T39]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   17.535761][   T39]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   17.535763][   T39]  worker_thread (kernel/workqueue.c:3470 kernel/workqueue.c:3551)
[   17.535766][   T39]  ? rescuer_thread (./include/linux/list.h:419 (discriminator 3))
[   17.535767][   T39]  kthread (kernel/kthread.c:436)
[   17.535770][   T39]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   17.535771][   T39]  ? kthread_affine_preferred (kernel/kthread.c:857)
[   17.535773][   T39]  ret_from_fork (arch/x86/kernel/process.c:158)
[   17.535776][   T39]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/vdso/vma.c:80 (discriminator 1))
[   17.535778][   T39]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[   17.535780][   T39]  ? kthread_affine_preferred (kernel/kthread.c:857)


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