======================================
| [   11.376375][  T195] softirqs last disabled at (23975): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   11.376378][  T195] Preemption disabled at:
| [   11.376378][  T195] vprintk_emit (kernel/printk/printk.c:2471)
| [   11.376388][  T195] Tainted: [W]=WARN
[   11.376389][  T195] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   11.376390][  T195] Call Trace:
[   11.376392][  T195]  <TASK>
[   11.376394][  T195]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   11.376400][  T195]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   11.376401][  T195]  __might_resched.cold (kernel/sched/core.c:9234)
[   11.376406][  T195]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   11.376410][  T195]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   11.376415][  T195]  __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))
[   11.376417][  T195]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   11.376424][  T195]  ? 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)
[   11.376426][  T195]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   11.376430][  T195]  put_chars (drivers/char/virtio_console.c:1176)
[   11.376433][  T195]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   11.376436][  T195]  ? validate_chain (kernel/locking/lockdep.c:159 kernel/locking/lockdep.c:191 kernel/locking/lockdep.c:3928)
[   11.376441][  T195]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   11.376445][  T195]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.376447][  T195]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.376452][  T195]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   11.376454][  T195]  ? console_emit_next_record (kernel/printk/printk.c:3095 (discriminator 2) kernel/printk/printk.c:3182 (discriminator 2))
[   11.376457][  T195]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.376460][  T195]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   11.376464][  T195]  console_emit_next_record (kernel/printk/printk.c:3183)
[   11.376468][  T195]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   11.376470][  T195]  ? 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))
[   11.376473][  T195]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.376475][  T195]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   11.376479][  T195]  console_flush_one_record (kernel/printk/printk.c:3268)
[   11.376483][  T195]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   11.376485][  T195]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.376491][  T195]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   11.376494][  T195]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   11.376496][  T195]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.376497][  T195]  ? 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)
[   11.376501][  T195]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   11.376503][  T195]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   11.376506][  T195]  vprintk_emit (kernel/printk/printk.c:2479)
[   11.376509][  T195]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   11.376511][  T195]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   11.376516][  T195]  _printk (kernel/printk/printk.c:2504)
[   11.376519][  T195]  ? snapshot_read.cold (user.c:?)
[   11.376521][  T195]  ? ___ratelimit (lib/ratelimit.c:97 (discriminator 3))
[   11.376527][  T195]  ? idr_get_free (??:?)
[   11.376528][  T195]  ? __might_fault (mm/memory.c:7482 (discriminator 5))
[   11.376534][  T195]  ipv4_local_port_range.cold (net/ipv4/sysctl_net_ipv4.c:64 (discriminator 3) net/ipv4/sysctl_net_ipv4.c:97 (discriminator 3))
[   11.376538][  T195]  ? proc_tcp_ehash_entries (net/ipv4/sysctl_net_ipv4.c:416)
[   11.376545][  T195]  ? __kvmalloc_node_noprof (mm/slub.c:5415 mm/slub.c:7005)
[   11.376547][  T195]  ? proc_sys_call_handler (fs/proc/proc_sysctl.c:583 (discriminator 7))
[   11.376553][  T195]  proc_sys_call_handler (fs/proc/proc_sysctl.c:600)
[   11.376555][  T195]  ? proc_sys_lookup (fs/proc/proc_sysctl.c:543 (discriminator 3))
[   11.376558][  T195]  ? handle_pte_fault (mm/memory.c:6558)
[   11.376560][  T195]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   11.376563][  T195]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   11.376565][  T195]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   11.376567][  T195]  ? proc_sys_call_handler (fs/proc/proc_sysctl.c:591)
[   11.376570][  T195]  new_sync_write (fs/read_write.c:595)
[   11.376572][  T195]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.376575][  T195]  ? new_sync_read (./include/linux/ioprio.h:41)
[   11.376578][  T195]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   11.376580][  T195]  ? ksys_write (fs/read_write.c:739)
[   11.376586][  T195]  vfs_write (fs/read_write.c:687)
[   11.376590][  T195]  ksys_write (fs/read_write.c:739)
[   11.376593][  T195]  ? __ia32_sys_read (fs/read_write.c:723)
[   11.376595][  T195]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.376597][  T195]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.376600][  T195]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   11.376603][  T195]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   11.376606][  T195]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   11.376608][  T195] RIP: 0033:0x7f1fd099754e
[   11.376612][  T195] 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
[   11.376614][  T195] RSP: 002b:00007ffe0dbe14e0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[   11.376617][  T195] RAX: ffffffffffffffda RBX: 000000000000000c RCX: 00007f1fd099754e
[   11.376618][  T195] RDX: 000000000000000c RSI: 000055ef7fd404b0 RDI: 0000000000000005
[   11.376619][  T195] RBP: 00007ffe0dbe14f0 R08: 0000000000000000 R09: 0000000000000000
[   11.376620][  T195] R10: 0000000000000000 R11: 0000000000000202 R12: 000055ef7fd425e0


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