======================================
| [    9.896492][  T170] softirqs last disabled at (18967): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [    9.896495][  T170] Preemption disabled at:
| [    9.896495][  T170] vprintk_emit (kernel/printk/printk.c:2471)
| [    9.896505][  T170] Tainted: [W]=WARN
[    9.896505][  T170] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    9.896507][  T170] Call Trace:
[    9.896509][  T170]  <TASK>
[    9.896510][  T170]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[    9.896516][  T170]  ? vprintk_emit (kernel/printk/printk.c:2471)
[    9.896518][  T170]  __might_resched.cold (kernel/sched/core.c:9234)
[    9.896523][  T170]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[    9.896527][  T170]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[    9.896531][  T170]  __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))
[    9.896533][  T170]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[    9.896539][  T170]  ? 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)
[    9.896541][  T170]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[    9.896544][  T170]  put_chars (drivers/char/virtio_console.c:1176)
[    9.896547][  T170]  ? __send_to_port (drivers/char/virtio_console.c:654)
[    9.896550][  T170]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[    9.896555][  T170]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[    9.896561][  T170]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[    9.896564][  T170]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    9.896567][  T170]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[    9.896571][  T170]  console_emit_next_record (kernel/printk/printk.c:3183)
[    9.896575][  T170]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[    9.896579][  T170]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    9.896581][  T170]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[    9.896585][  T170]  console_flush_one_record (kernel/printk/printk.c:3268)
[    9.896589][  T170]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[    9.896591][  T170]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[    9.896596][  T170]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[    9.896598][  T170]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[    9.896600][  T170]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    9.896602][  T170]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[    9.896605][  T170]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[    9.896606][  T170]  ? vprintk_emit (kernel/printk/printk.c:2478)
[    9.896610][  T170]  vprintk_emit (kernel/printk/printk.c:2479)
[    9.896613][  T170]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[    9.896615][  T170]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[    9.896619][  T170]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[    9.896620][  T170]  ? fast_dput (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) fs/dcache.c:948 (discriminator 2))
[    9.896625][  T170]  ? cleanup_netconsole (./include/linux/list.h:99 (discriminator 2) ./include/linux/list.h:169 (discriminator 2) ./include/linux/list.h:206 (discriminator 2) ./include/linux/configfs.h:112 (discriminator 2) drivers/net/netconsole.c:1718 (discriminator 2)) netconsole
[    9.896629][  T170]  _printk (kernel/printk/printk.c:2504)
[    9.896633][  T170]  ? snapshot_read.cold (user.c:?)
[    9.896636][  T170]  ? __up_write (kernel/locking/rwsem.c:1422 (discriminator 1))
[    9.896639][  T170]  ? cleanup_netconsole (./include/linux/list.h:99 (discriminator 2) ./include/linux/list.h:169 (discriminator 2) ./include/linux/list.h:206 (discriminator 2) ./include/linux/configfs.h:112 (discriminator 2) drivers/net/netconsole.c:1718 (discriminator 2)) netconsole
[    9.896643][  T170]  ? configfs_register_subsystem (./include/linux/instrumented.h:112 ./include/linux/atomic/atomic-instrumented.h:1383 fs/configfs/dir.c:173 fs/configfs/dir.c:171 fs/configfs/dir.c:1929)
[    9.896647][  T170] init_netconsole (drivers/net/netconsole.c:1286) netconsole
[    9.896651][  T170]  ? cleanup_netconsole (./include/linux/list.h:99 (discriminator 2) ./include/linux/list.h:169 (discriminator 2) ./include/linux/list.h:206 (discriminator 2) ./include/linux/configfs.h:112 (discriminator 2) drivers/net/netconsole.c:1718 (discriminator 2)) netconsole
[    9.896658][  T170]  ? cleanup_netconsole (./include/linux/list.h:99 (discriminator 2) ./include/linux/list.h:169 (discriminator 2) ./include/linux/list.h:206 (discriminator 2) ./include/linux/configfs.h:112 (discriminator 2) drivers/net/netconsole.c:1718 (discriminator 2)) netconsole
[    9.896660][  T170]  do_one_initcall (init/main.c:1357)
[    9.896664][  T170]  ? trace_event_raw_event_initcall_level (./include/trace/events/initcall.h:10)
[    9.896669][  T170]  ? do_init_module (./include/linux/slab.h:991 (discriminator 1) kernel/module/main.c:3105 (discriminator 1))
[    9.896672][  T170]  ? kasan_unpoison (mm/kasan/shadow.c:146 mm/kasan/shadow.c:178)
[    9.896677][  T170]  do_init_module (kernel/module/main.c:3117)
[    9.896681][  T170]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4488)
[    9.896685][  T170]  ? free_module (./include/trace/events/module.h:50 (discriminator 19))
[    9.896688][  T170]  ? kfree (./include/linux/kasan.h:235 mm/slub.c:2748 mm/slub.c:6499 mm/slub.c:6792)
[    9.896692][  T170]  load_module (kernel/module/main.c:3593)
[    9.896699][  T170]  ? layout_and_allocate.isra.0 (kernel/module/main.c:3016)
[    9.896702][  T170]  ? __ia32_sys_fsconfig (??:?)
[    9.896706][  T170]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[    9.896709][  T170]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[    9.896712][  T170]  init_module_from_file (kernel/module/main.c:3790)
[    9.896715][  T170]  ? __do_sys_init_module (kernel/module/main.c:3664)
[    9.896723][  T170]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[    9.896736][  T170]  ? 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)
[    9.896740][  T170]  idempotent_init_module (kernel/module/main.c:3802)
[    9.896745][  T170]  ? init_module_from_file (kernel/module/main.c:3791)
[    9.896755][  T170]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    9.896758][  T170]  ? cap_capable (./include/trace/events/capability.h:26 (discriminator 22) security/commoncap.c:130 (discriminator 22))
[    9.896766][  T170]  __x64_sys_finit_module (kernel/module/main.c:3828 kernel/module/main.c:3812 kernel/module/main.c:3812)
[    9.896768][  T170]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[    9.896772][  T170]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[    9.896774][  T170]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[    9.896777][  T170]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    9.896779][  T170] RIP: 0033:0x7fa8c2b0a37d
[    9.896782][  T170] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 4b aa 0f 00 f7 d8 64 89 01 48
All code
========
   0:	ff c3                	inc    %ebx
   2:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   9:	00 00 00 
   c:	90                   	nop
   d:	f3 0f 1e fa          	endbr64
  11:	48 89 f8             	mov    %rdi,%rax
  14:	48 89 f7             	mov    %rsi,%rdi
  17:	48 89 d6             	mov    %rdx,%rsi
  1a:	48 89 ca             	mov    %rcx,%rdx
  1d:	4d 89 c2             	mov    %r8,%r10
  20:	4d 89 c8             	mov    %r9,%r8
  23:	4c 8b 4c 24 08       	mov    0x8(%rsp),%r9
  28:	0f 05                	syscall
  2a:*	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax		<-- trapping instruction
  30:	73 01                	jae    0x33
  32:	c3                   	ret
  33:	48 8b 0d 4b aa 0f 00 	mov    0xfaa4b(%rip),%rcx        # 0xfaa85
  3a:	f7 d8                	neg    %eax
  3c:	64 89 01             	mov    %eax,%fs:(%rcx)
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax
   6:	73 01                	jae    0x9
   8:	c3                   	ret
   9:	48 8b 0d 4b aa 0f 00 	mov    0xfaa4b(%rip),%rcx        # 0xfaa5b
  10:	f7 d8                	neg    %eax
  12:	64 89 01             	mov    %eax,%fs:(%rcx)
  15:	48                   	rex.W
[    9.896784][  T170] RSP: 002b:00007ffc5a707e98 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[    9.896787][  T170] RAX: ffffffffffffffda RBX: 000055ccc398a700 RCX: 00007fa8c2b0a37d
[    9.896788][  T170] RDX: 0000000000000000 RSI: 000055ccbd4e0ffd RDI: 0000000000000005
[    9.896789][  T170] RBP: 00007ffc5a707f30 R08: 0000000000000000 R09: 0000000000000000
[    9.896790][  T170] R10: 0000000000000000 R11: 0000000000000246 R12: 000055ccbd4e0ffd
[    9.896791][  T170] R13: 000055ccc398a810 R14: 0000000000040000 R15: 0000000000000000
| [   12.161763][  T223] softirqs last disabled at (20563): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   12.161766][  T223] Preemption disabled at:
| [   12.161767][  T223] vprintk_emit (kernel/printk/printk.c:2471)
| [   12.161776][  T223] Tainted: [W]=WARN
[   12.161777][  T223] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   12.161779][  T223] Call Trace:
[   12.161780][  T223]  <TASK>
[   12.161782][  T223]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   12.161788][  T223]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   12.161790][  T223]  __might_resched.cold (kernel/sched/core.c:9234)
[   12.161795][  T223]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   12.161799][  T223]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   12.161803][  T223]  __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))
[   12.161805][  T223]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   12.161811][  T223]  ? 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)
[   12.161814][  T223]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   12.161817][  T223]  put_chars (drivers/char/virtio_console.c:1176)
[   12.161820][  T223]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   12.161821][  T223]  ? printk_get_next_message (kernel/printk/printk.c:3072)
[   12.161825][  T223]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   12.161828][  T223]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   12.161832][  T223]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   12.161834][  T223]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.161836][  T223]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.161840][  T223]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   12.161843][  T223]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.161846][  T223]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.161850][  T223]  console_emit_next_record (kernel/printk/printk.c:3183)
[   12.161854][  T223]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   12.161858][  T223]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.161860][  T223]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.161864][  T223]  console_flush_one_record (kernel/printk/printk.c:3268)
[   12.161868][  T223]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   12.161869][  T223]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.161874][  T223]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   12.161877][  T223]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   12.161879][  T223]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.161881][  T223]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   12.161884][  T223]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   12.161886][  T223]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   12.161889][  T223]  vprintk_emit (kernel/printk/printk.c:2479)
[   12.161892][  T223]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   12.161895][  T223]  ? _copy_from_iter (./include/linux/instrumented.h:146 lib/iov_iter.c:66 ./include/linux/iov_iter.h:30 ./include/linux/iov_iter.h:302 ./include/linux/iov_iter.h:330 lib/iov_iter.c:261 lib/iov_iter.c:272)
[   12.161901][  T223]  devkmsg_emit.constprop.0 (kernel/printk/printk.c:733)
[   12.161905][  T223]  ? vprintk_emit.cold (kernel/printk/printk.c:2449)
[   12.161909][  T223]  ? __kmalloc_noprof (mm/slub.c:5415 mm/slub.c:5439)
[   12.161911][  T223]  ? idr_get_free (??:?)
[   12.161915][  T223]  ? devkmsg_write (./include/linux/slab.h:995 kernel/printk/printk.c:762)
[   12.161918][  T223]  ? _copy_from_iter (./include/linux/instrumented.h:146 lib/iov_iter.c:66 ./include/linux/iov_iter.h:30 ./include/linux/iov_iter.h:302 ./include/linux/iov_iter.h:330 lib/iov_iter.c:261 lib/iov_iter.c:272)
[   12.161921][  T223]  devkmsg_write.cold (kernel/printk/printk.c:796)
[   12.161923][  T223]  ? vprintk_default (kernel/printk/printk.c:2494)
[   12.161925][  T223]  ? handle_pte_fault (mm/memory.c:6558)
[   12.161930][  T223]  ? do_numa_page.isra.0 (mm/memory.c:6319 (discriminator 1))
[   12.161932][  T223]  ? vprintk_default (kernel/printk/printk.c:2494)
[   12.161935][  T223]  new_sync_write (fs/read_write.c:595)
[   12.161940][  T223]  ? new_sync_read (./include/linux/ioprio.h:41)
[   12.161941][  T223]  ? lock_vma_under_rcu (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) mm/mmap_lock.c:329 (discriminator 2))
[   12.161949][  T223]  vfs_write (fs/read_write.c:687)
[   12.161954][  T223]  ksys_write (fs/read_write.c:739)
[   12.161956][  T223]  ? __ia32_sys_read (fs/read_write.c:723)
[   12.161959][  T223]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.161961][  T223]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.161964][  T223]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   12.161967][  T223]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   12.161970][  T223]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   12.161972][  T223] RIP: 0033:0x7f75dcb3854e
[   12.161976][  T223] 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
[   12.161978][  T223] RSP: 002b:00007ffe452ee8f0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[   12.161981][  T223] RAX: ffffffffffffffda RBX: 00007f75dccb9580 RCX: 00007f75dcb3854e
[   12.161982][  T223] RDX: 0000000000000021 RSI: 000055eb60198060 RDI: 0000000000000001
[   12.161983][  T223] RBP: 00007ffe452ee900 R08: 0000000000000000 R09: 0000000000000000
[   12.161985][  T223] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000021
[   12.161986][  T223] R13: 0000000000000021 R14: 000055eb60198060 R15: 00007f75dccb9668
| [   13.321088][  T269] softirqs last disabled at (8489): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   13.321091][  T269] Preemption disabled at:
| [   13.321092][  T269] vprintk_emit (kernel/printk/printk.c:2471)
| [   13.321102][  T269] Tainted: [W]=WARN
[   13.321103][  T269] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   13.321105][  T269] Call Trace:
[   13.321107][  T269]  <TASK>
[   13.321108][  T269]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   13.321114][  T269]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   13.321116][  T269]  __might_resched.cold (kernel/sched/core.c:9234)
[   13.321120][  T269]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   13.321124][  T269]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   13.321129][  T269]  __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))
[   13.321131][  T269]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   13.321137][  T269]  ? 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)
[   13.321140][  T269]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   13.321143][  T269]  put_chars (drivers/char/virtio_console.c:1176)
[   13.321146][  T269]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   13.321147][  T269]  ? printk_get_next_message (kernel/printk/printk.c:3072)
[   13.321151][  T269]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   13.321154][  T269]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   13.321158][  T269]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   13.321161][  T269]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   13.321162][  T269]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   13.321167][  T269]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   13.321170][  T269]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.321173][  T269]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   13.321177][  T269]  console_emit_next_record (kernel/printk/printk.c:3183)
[   13.321180][  T269]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   13.321184][  T269]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.321187][  T269]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   13.321191][  T269]  console_flush_one_record (kernel/printk/printk.c:3268)
[   13.321195][  T269]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   13.321196][  T269]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   13.321201][  T269]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   13.321204][  T269]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   13.321206][  T269]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.321208][  T269]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   13.321211][  T269]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   13.321213][  T269]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   13.321216][  T269]  vprintk_emit (kernel/printk/printk.c:2479)
[   13.321219][  T269]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   13.321223][  T269]  ? _copy_from_iter (./include/linux/instrumented.h:146 lib/iov_iter.c:66 ./include/linux/iov_iter.h:30 ./include/linux/iov_iter.h:302 ./include/linux/iov_iter.h:330 lib/iov_iter.c:261 lib/iov_iter.c:272)
[   13.321229][  T269]  devkmsg_emit.constprop.0 (kernel/printk/printk.c:733)
[   13.321233][  T269]  ? vprintk_emit.cold (kernel/printk/printk.c:2449)
[   13.321237][  T269]  ? __kmalloc_noprof (mm/slub.c:5415 mm/slub.c:5439)
[   13.321239][  T269]  ? idr_get_free (??:?)
[   13.321242][  T269]  ? devkmsg_write (./include/linux/slab.h:995 kernel/printk/printk.c:762)
[   13.321245][  T269]  ? _copy_from_iter (./include/linux/instrumented.h:146 lib/iov_iter.c:66 ./include/linux/iov_iter.h:30 ./include/linux/iov_iter.h:302 ./include/linux/iov_iter.h:330 lib/iov_iter.c:261 lib/iov_iter.c:272)
[   13.321248][  T269]  devkmsg_write.cold (kernel/printk/printk.c:796)
[   13.321251][  T269]  ? vprintk_default (kernel/printk/printk.c:2494)
[   13.321253][  T269]  ? handle_pte_fault (mm/memory.c:6558)
[   13.321258][  T269]  ? do_numa_page.isra.0 (mm/memory.c:6319 (discriminator 1))
[   13.321260][  T269]  ? vprintk_default (kernel/printk/printk.c:2494)
[   13.321262][  T269]  new_sync_write (fs/read_write.c:595)
[   13.321267][  T269]  ? new_sync_read (./include/linux/ioprio.h:41)
[   13.321269][  T269]  ? lock_vma_under_rcu (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) mm/mmap_lock.c:329 (discriminator 2))
[   13.321277][  T269]  vfs_write (fs/read_write.c:687)
[   13.321281][  T269]  ksys_write (fs/read_write.c:739)
[   13.321284][  T269]  ? __ia32_sys_read (fs/read_write.c:723)
[   13.321286][  T269]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.321289][  T269]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.321292][  T269]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   13.321294][  T269]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   13.321297][  T269]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   13.321300][  T269] RIP: 0033:0x7f32cfa3254e
[   13.321304][  T269] 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
[   13.321306][  T269] RSP: 002b:00007ffe03c25b90 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[   13.321309][  T269] RAX: ffffffffffffffda RBX: 00007f32cfbb3580 RCX: 00007f32cfa3254e
[   13.321311][  T269] RDX: 0000000000000021 RSI: 0000561c35c7b060 RDI: 0000000000000001
[   13.321312][  T269] RBP: 00007ffe03c25ba0 R08: 0000000000000000 R09: 0000000000000000
[   13.321313][  T269] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000021


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