======================================
| [   13.269845][  T157] softirqs last disabled at (188069): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   13.269848][  T157] Preemption disabled at:
| [   13.269849][  T157] vprintk_emit (kernel/printk/printk.c:2471)
| [   13.269859][  T157] Tainted: [W]=WARN
[   13.269860][  T157] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   13.269862][  T157] Call Trace:
[   13.269864][  T157]  <TASK>
[   13.269866][  T157]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   13.269872][  T157]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   13.269874][  T157]  __might_resched.cold (kernel/sched/core.c:9234)
[   13.269879][  T157]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   13.269883][  T157]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   13.269888][  T157]  __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))
[   13.269890][  T157]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   13.269896][  T157]  ? 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)
[   13.269899][  T157]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   13.269902][  T157]  put_chars (drivers/char/virtio_console.c:1176)
[   13.269905][  T157]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   13.269906][  T157]  ? printk_get_next_message (kernel/printk/printk.c:3072)
[   13.269910][  T157]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   13.269913][  T157]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   13.269917][  T157]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   13.269920][  T157]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   13.269921][  T157]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   13.269925][  T157]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   13.269929][  T157]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.269932][  T157]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   13.269936][  T157]  console_emit_next_record (kernel/printk/printk.c:3183)
[   13.269939][  T157]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   13.269944][  T157]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.269946][  T157]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   13.269950][  T157]  console_flush_one_record (kernel/printk/printk.c:3268)
[   13.269954][  T157]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   13.269956][  T157]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   13.269961][  T157]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   13.269963][  T157]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   13.269965][  T157]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.269967][  T157]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   13.269971][  T157]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   13.269973][  T157]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   13.269976][  T157]  vprintk_emit (kernel/printk/printk.c:2479)
[   13.269979][  T157]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   13.269982][  T157]  ? _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)
[   13.269988][  T157]  devkmsg_emit.constprop.0 (kernel/printk/printk.c:733)
[   13.269993][  T157]  ? vprintk_emit.cold (kernel/printk/printk.c:2449)
[   13.269997][  T157]  ? __kmalloc_noprof (mm/slub.c:5415 mm/slub.c:5439)
[   13.269999][  T157]  ? idr_get_free (??:?)
[   13.270003][  T157]  ? devkmsg_write (./include/linux/slab.h:995 kernel/printk/printk.c:762)
[   13.270006][  T157]  ? _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)
[   13.270009][  T157]  devkmsg_write.cold (kernel/printk/printk.c:796)
[   13.270012][  T157]  ? vprintk_default (kernel/printk/printk.c:2494)
[   13.270013][  T157]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   13.270015][  T157]  ? vfs_lock_file (./include/linux/fs.h:1348)
[   13.270020][  T157]  ? vprintk_default (kernel/printk/printk.c:2494)
[   13.270022][  T157]  new_sync_write (fs/read_write.c:595)
[   13.270027][  T157]  ? new_sync_read (./include/linux/ioprio.h:41)
[   13.270029][  T157]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   13.270037][  T157]  vfs_write (fs/read_write.c:687)
[   13.270042][  T157]  ksys_write (fs/read_write.c:739)
[   13.270045][  T157]  ? __ia32_sys_read (fs/read_write.c:723)
[   13.270046][  T157]  ? 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)
[   13.270049][  T157]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.270053][  T157]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   13.270055][  T157]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   13.270058][  T157]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   13.270061][  T157] RIP: 0033:0x7f1a5023654e
[   13.270065][  T157] 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
[   13.270067][  T157] RSP: 002b:00007ffc10437610 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[   13.270070][  T157] RAX: ffffffffffffffda RBX: 00007f1a503b7580 RCX: 00007f1a5023654e
[   13.270071][  T157] RDX: 0000000000000023 RSI: 000055ac750e0d20 RDI: 0000000000000001
[   13.270073][  T157] RBP: 00007ffc10437620 R08: 0000000000000000 R09: 0000000000000000
[   13.270074][  T157] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000023
[   13.270075][  T157] R13: 0000000000000023 R14: 000055ac750e0d20 R15: 0000000000000000
| [   16.705746][  T157] softirqs last disabled at (370184): restore_fpregs_from_user (./include/linux/bottom_half.h:20 (discriminator 2) ./arch/x86/include/asm/fpu/api.h:69 (discriminator 2) arch/x86/kernel/fpu/signal.c:277 (discriminator 2))
| [   16.705748][  T157] Preemption disabled at:
| [   16.705749][  T157] vprintk_emit (kernel/printk/printk.c:2471)
| [   16.705759][  T157] Tainted: [W]=WARN
[   16.705760][  T157] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.705762][  T157] Call Trace:
[   16.705764][  T157]  <TASK>
[   16.705765][  T157]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   16.705771][  T157]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   16.705773][  T157]  __might_resched.cold (kernel/sched/core.c:9234)
[   16.705782][  T157]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   16.705786][  T157]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   16.705791][  T157]  __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))
[   16.705793][  T157]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   16.705799][  T157]  ? 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)
[   16.705802][  T157]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   16.705805][  T157]  put_chars (drivers/char/virtio_console.c:1176)
[   16.705808][  T157]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   16.705810][  T157]  ? printk_get_next_message (kernel/printk/printk.c:3072)
[   16.705813][  T157]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   16.705816][  T157]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   16.705820][  T157]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   16.705823][  T157]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   16.705824][  T157]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   16.705828][  T157]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   16.705831][  T157]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   16.705834][  T157]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   16.705838][  T157]  console_emit_next_record (kernel/printk/printk.c:3183)
[   16.705841][  T157]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   16.705846][  T157]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   16.705848][  T157]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   16.705852][  T157]  console_flush_one_record (kernel/printk/printk.c:3268)
[   16.705855][  T157]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   16.705857][  T157]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   16.705862][  T157]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   16.705864][  T157]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   16.705866][  T157]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   16.705868][  T157]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   16.705872][  T157]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   16.705873][  T157]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   16.705876][  T157]  vprintk_emit (kernel/printk/printk.c:2479)
[   16.705880][  T157]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   16.705883][  T157]  ? _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)
[   16.705888][  T157]  devkmsg_emit.constprop.0 (kernel/printk/printk.c:733)
[   16.705892][  T157]  ? vprintk_emit.cold (kernel/printk/printk.c:2449)
[   16.705896][  T157]  ? __kmalloc_noprof (mm/slub.c:5415 mm/slub.c:5439)
[   16.705898][  T157]  ? idr_get_free (??:?)
[   16.705902][  T157]  ? devkmsg_write (./include/linux/slab.h:995 kernel/printk/printk.c:762)
[   16.705905][  T157]  ? _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)
[   16.705908][  T157]  devkmsg_write.cold (kernel/printk/printk.c:796)
[   16.705910][  T157]  ? vprintk_default (kernel/printk/printk.c:2494)
[   16.705912][  T157]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   16.705914][  T157]  ? vfs_lock_file (./include/linux/fs.h:1348)
[   16.705919][  T157]  ? vprintk_default (kernel/printk/printk.c:2494)
[   16.705921][  T157]  new_sync_write (fs/read_write.c:595)
[   16.705926][  T157]  ? new_sync_read (./include/linux/ioprio.h:41)
[   16.705927][  T157]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   16.705935][  T157]  vfs_write (fs/read_write.c:687)
[   16.705939][  T157]  ksys_write (fs/read_write.c:739)
[   16.705942][  T157]  ? __ia32_sys_read (fs/read_write.c:723)
[   16.705944][  T157]  ? 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)
[   16.705946][  T157]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   16.705950][  T157]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   16.705952][  T157]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   16.705955][  T157]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   16.705958][  T157] RIP: 0033:0x7f1a5023654e
[   16.705961][  T157] 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
[   16.705963][  T157] RSP: 002b:00007ffc10437610 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[   16.705966][  T157] RAX: ffffffffffffffda RBX: 00007f1a503b7580 RCX: 00007f1a5023654e
[   16.705968][  T157] RDX: 0000000000000023 RSI: 000055ac750e0d20 RDI: 0000000000000001
[   16.705969][  T157] RBP: 00007ffc10437620 R08: 0000000000000000 R09: 0000000000000000
[   16.705970][  T157] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000023


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