======================================
| [   10.305869][  T221] softirqs last disabled at (25765): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   10.305871][  T221] Preemption disabled at:
| [   10.305872][  T221] vprintk_emit (kernel/printk/printk.c:2471)
| [   10.305880][  T221] Tainted: [W]=WARN
[   10.305881][  T221] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   10.305883][  T221] Call Trace:
[   10.305885][  T221]  <TASK>
[   10.305886][  T221]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   10.305891][  T221]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   10.305893][  T221]  __might_resched.cold (kernel/sched/core.c:9234)
[   10.305897][  T221]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   10.305901][  T221]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   10.305905][  T221]  __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))
[   10.305908][  T221]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   10.305914][  T221]  ? 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)
[   10.305917][  T221]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   10.305921][  T221]  put_chars (drivers/char/virtio_console.c:1176)
[   10.305924][  T221]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   10.305927][  T221]  ? validate_chain (kernel/locking/lockdep.c:159 kernel/locking/lockdep.c:191 kernel/locking/lockdep.c:3928)
[   10.305932][  T221]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   10.305936][  T221]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   10.305941][  T221]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   10.305944][  T221]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.305950][  T221]  console_emit_next_record (kernel/printk/printk.c:3183)
[   10.305954][  T221]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   10.305955][  T221]  ? 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))
[   10.305958][  T221]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.305960][  T221]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   10.305964][  T221]  console_flush_one_record (kernel/printk/printk.c:3268)
[   10.305968][  T221]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   10.305969][  T221]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   10.305975][  T221]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   10.305977][  T221]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   10.305978][  T221]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.305980][  T221]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   10.305984][  T221]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   10.305986][  T221]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   10.305989][  T221]  vprintk_emit (kernel/printk/printk.c:2479)
[   10.305992][  T221]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   10.305994][  T221]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   10.305999][  T221]  _printk (kernel/printk/printk.c:2504)
[   10.306003][  T221]  ? snapshot_read.cold (user.c:?)
[   10.306004][  T221]  ? ___ratelimit (lib/ratelimit.c:97 (discriminator 3))
[   10.306010][  T221]  ? idr_get_free (??:?)
[   10.306012][  T221]  ? __might_fault (mm/memory.c:7482 (discriminator 5))
[   10.306018][  T221]  ipv4_local_port_range.cold (net/ipv4/sysctl_net_ipv4.c:64 (discriminator 3) net/ipv4/sysctl_net_ipv4.c:97 (discriminator 3))
[   10.306022][  T221]  ? proc_tcp_ehash_entries (net/ipv4/sysctl_net_ipv4.c:416)
[   10.306028][  T221]  ? __kvmalloc_node_noprof (mm/slub.c:5415 mm/slub.c:7005)
[   10.306031][  T221]  ? proc_sys_call_handler (fs/proc/proc_sysctl.c:583 (discriminator 7))
[   10.306037][  T221]  proc_sys_call_handler (fs/proc/proc_sysctl.c:600)
[   10.306039][  T221]  ? proc_sys_lookup (fs/proc/proc_sysctl.c:543 (discriminator 3))
[   10.306042][  T221]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   10.306045][  T221]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   10.306048][  T221]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   10.306050][  T221]  ? proc_sys_call_handler (fs/proc/proc_sysctl.c:591)
[   10.306052][  T221]  new_sync_write (fs/read_write.c:595)
[   10.306056][  T221]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   10.306059][  T221]  ? new_sync_read (./include/linux/ioprio.h:41)
[   10.306062][  T221]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   10.306064][  T221]  ? ksys_write (fs/read_write.c:739)
[   10.306076][  T221]  vfs_write (fs/read_write.c:687)
[   10.306079][  T221]  ksys_write (fs/read_write.c:739)
[   10.306082][  T221]  ? __ia32_sys_read (fs/read_write.c:723)
[   10.306084][  T221]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.306086][  T221]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.306089][  T221]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   10.306092][  T221]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   10.306095][  T221]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   10.306097][  T221] RIP: 0033:0x7fa9e0d0154e
[   10.306101][  T221] Code: 4d 89 d8 e8 b4 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa
All code
========
   0:	4d 89 d8             	mov    %r11,%r8
   3:	e8 b4 bd 00 00       	call   0xbdbc
   8:	4c 8b 5d f8          	mov    -0x8(%rbp),%r11
   c:	41 8b 93 08 03 00 00 	mov    0x308(%r11),%edx
  13:	59                   	pop    %rcx
  14:	5e                   	pop    %rsi
  15:	48 83 f8 fc          	cmp    $0xfffffffffffffffc,%rax
  19:	74 11                	je     0x2c
  1b:	c9                   	leave
  1c:	c3                   	ret
  1d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  24:	48 8b 45 10          	mov    0x10(%rbp),%rax
  28:	0f 05                	syscall
  2a:*	c9                   	leave		<-- trapping instruction
  2b:	c3                   	ret
  2c:	83 e2 39             	and    $0x39,%edx
  2f:	83 fa 08             	cmp    $0x8,%edx
  32:	75 e7                	jne    0x1b
  34:	e8 03 ff ff ff       	call   0xffffffffffffff3c
  39:	0f 1f 00             	nopl   (%rax)
  3c:	f3 0f 1e fa          	endbr64

Code starting with the faulting instruction
===========================================
   0:	c9                   	leave
   1:	c3                   	ret
   2:	83 e2 39             	and    $0x39,%edx
   5:	83 fa 08             	cmp    $0x8,%edx
   8:	75 e7                	jne    0xfffffffffffffff1
   a:	e8 03 ff ff ff       	call   0xffffffffffffff12
   f:	0f 1f 00             	nopl   (%rax)
  12:	f3 0f 1e fa          	endbr64
[   10.306102][  T221] RSP: 002b:00007ffc79f6ea10 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[   10.306105][  T221] RAX: ffffffffffffffda RBX: 000000000000000c RCX: 00007fa9e0d0154e
[   10.306106][  T221] RDX: 000000000000000c RSI: 00005614717a94b0 RDI: 0000000000000005
[   10.306107][  T221] RBP: 00007ffc79f6ea20 R08: 0000000000000000 R09: 0000000000000000
[   10.306108][  T221] R10: 0000000000000000 R11: 0000000000000202 R12: 00005614717ab5e0


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