======================================
| [   35.398690][  T502] softirqs last disabled at (74049): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   35.398692][  T502] Preemption disabled at:
| [   35.398693][  T502] 0x0
| [   35.398703][  T502] Tainted: [W]=WARN
[   35.398704][  T502] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   35.398706][  T502] Call Trace:
[   35.398708][  T502]  <TASK>
[   35.398709][  T502]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   35.398715][  T502]  __might_resched.cold (kernel/sched/core.c:9234)
[   35.398720][  T502]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   35.398724][  T502]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   35.398729][  T502]  __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))
[   35.398732][  T502]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   35.398738][  T502]  ? 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)
[   35.398741][  T502]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   35.398745][  T502]  put_chars (drivers/char/virtio_console.c:1176)
[   35.398748][  T502]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   35.398750][  T502]  ? printk_get_next_message (kernel/printk/printk.c:3072)
[   35.398754][  T502]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   35.398757][  T502]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   35.398761][  T502]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   35.398764][  T502]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   35.398766][  T502]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   35.398770][  T502]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   35.398774][  T502]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   35.398777][  T502]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   35.398780][  T502]  console_emit_next_record (kernel/printk/printk.c:3183)
[   35.398784][  T502]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   35.398789][  T502]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   35.398791][  T502]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   35.398795][  T502]  console_flush_one_record (kernel/printk/printk.c:3268)
[   35.398799][  T502]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   35.398801][  T502]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   35.398806][  T502]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   35.398809][  T502]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   35.398811][  T502]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   35.398813][  T502]  ? 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))
[   35.398816][  T502]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   35.398818][  T502]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   35.398821][  T502]  vprintk_emit (kernel/printk/printk.c:2479)
[   35.398825][  T502]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   35.398828][  T502]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   35.398832][  T502]  _printk (kernel/printk/printk.c:2504)
[   35.398836][  T502]  ? snapshot_read.cold (user.c:?)
[   35.398838][  T502]  ? 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)
[   35.398841][  T502]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   35.398845][  T502]  ? 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)
[   35.398847][  T502]  do_exit.cold (kernel/exit.c:889 (discriminator 4) kernel/exit.c:1043 (discriminator 4))
[   35.398851][  T502]  ? exit_notify (kernel/exit.c:780)
[   35.398853][  T502]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   35.398856][  T502]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   35.398860][  T502]  do_group_exit (kernel/exit.c:1151)
[   35.398863][  T502]  __x64_sys_exit_group (kernel/exit.c:1162 kernel/exit.c:1160 kernel/exit.c:1160)
[   35.398866][  T502]  x64_sys_call (./arch/x86/include/generated/asm/syscalls_64.h:232)
[   35.398868][  T502]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   35.398872][  T502]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   35.398876][  T502]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   35.398878][  T502] RIP: 0033:0x7ff2b42d11b8
[   35.398880][  T502] Code: Unable to access opcode bytes at 0x7ff2b42d118e.

Code starting with the faulting instruction
===========================================
[   35.398881][  T502] RSP: 002b:00007fff9e315b98 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   35.398884][  T502] RAX: ffffffffffffffda RBX: 00007ff2b4401f88 RCX: 00007ff2b42d11b8
[   35.398886][  T502] RDX: 00007ff2b41b6e88 RSI: ffffffffffffffb0 RDI: 0000000000000000
[   35.398887][  T502] RBP: 00007fff9e315bf0 R08: 0000000000000000 R09: 0000000000004010
[   35.398888][  T502] R10: 00007fff9e3159f0 R11: 0000000000000246 R12: 0000000000000003


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