======================================
| [   11.029407][  T159] softirqs last disabled at (116860): 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))
| [   11.029409][  T159] Preemption disabled at:
| [   11.029410][  T159] vprintk_emit (kernel/printk/printk.c:2471)
| [   11.029420][  T159] Tainted: [W]=WARN
[   11.029421][  T159] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   11.029423][  T159] Call Trace:
[   11.029425][  T159]  <TASK>
[   11.029427][  T159]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   11.029432][  T159]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   11.029434][  T159]  __might_resched.cold (kernel/sched/core.c:9234)
[   11.029439][  T159]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   11.029443][  T159]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   11.029448][  T159]  __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))
[   11.029450][  T159]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   11.029456][  T159]  ? 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)
[   11.029459][  T159]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   11.029462][  T159]  put_chars (drivers/char/virtio_console.c:1176)
[   11.029465][  T159]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   11.029466][  T159]  ? printk_get_next_message (kernel/printk/printk.c:3072)
[   11.029470][  T159]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   11.029473][  T159]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   11.029477][  T159]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   11.029480][  T159]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.029481][  T159]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.029486][  T159]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   11.029489][  T159]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.029492][  T159]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   11.029496][  T159]  console_emit_next_record (kernel/printk/printk.c:3183)
[   11.029499][  T159]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   11.029503][  T159]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.029505][  T159]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   11.029509][  T159]  console_flush_one_record (kernel/printk/printk.c:3268)
[   11.029513][  T159]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   11.029515][  T159]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.029519][  T159]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   11.029522][  T159]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   11.029524][  T159]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.029526][  T159]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   11.029529][  T159]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   11.029531][  T159]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   11.029539][  T159]  vprintk_emit (kernel/printk/printk.c:2479)
[   11.029542][  T159]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   11.029545][  T159]  ? _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)
[   11.029551][  T159]  devkmsg_emit.constprop.0 (kernel/printk/printk.c:733)
[   11.029556][  T159]  ? vprintk_emit.cold (kernel/printk/printk.c:2449)
[   11.029560][  T159]  ? __kmalloc_noprof (mm/slub.c:5415 mm/slub.c:5439)
[   11.029561][  T159]  ? idr_get_free (??:?)
[   11.029565][  T159]  ? devkmsg_write (./include/linux/slab.h:995 kernel/printk/printk.c:762)
[   11.029568][  T159]  ? _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)
[   11.029571][  T159]  devkmsg_write.cold (kernel/printk/printk.c:796)
[   11.029574][  T159]  ? vprintk_default (kernel/printk/printk.c:2494)
[   11.029576][  T159]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.029578][  T159]  ? vfs_lock_file (./include/linux/fs.h:1348)
[   11.029582][  T159]  ? vprintk_default (kernel/printk/printk.c:2494)
[   11.029585][  T159]  new_sync_write (fs/read_write.c:595)
[   11.029590][  T159]  ? new_sync_read (./include/linux/ioprio.h:41)
[   11.029591][  T159]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   11.029599][  T159]  vfs_write (fs/read_write.c:687)
[   11.029603][  T159]  ksys_write (fs/read_write.c:739)
[   11.029606][  T159]  ? __ia32_sys_read (fs/read_write.c:723)
[   11.029608][  T159]  ? 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)
[   11.029611][  T159]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.029614][  T159]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   11.029616][  T159]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   11.029620][  T159]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   11.029622][  T159] RIP: 0033:0x7f771c51754e
[   11.029626][  T159] 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
[   11.029628][  T159] RSP: 002b:00007ffd046f9160 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[   11.029631][  T159] RAX: ffffffffffffffda RBX: 00007f771c698580 RCX: 00007f771c51754e
[   11.029633][  T159] RDX: 0000000000000023 RSI: 000055e96d963490 RDI: 0000000000000001
[   11.029634][  T159] RBP: 00007ffd046f9170 R08: 0000000000000000 R09: 0000000000000000
[   11.029635][  T159] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000023
[   11.029636][  T159] R13: 0000000000000023 R14: 000055e96d963490 R15: 0000000000000000
| [   12.164722][  T159] softirqs last disabled at (146410): 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))
| [   12.164726][  T159] Preemption disabled at:
| [   12.164727][  T159] vprintk_emit (kernel/printk/printk.c:2471)
| [   12.164739][  T159] Tainted: [W]=WARN
[   12.164740][  T159] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   12.164744][  T159] Call Trace:
[   12.164746][  T159]  <TASK>
[   12.164749][  T159]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   12.164756][  T159]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   12.164760][  T159]  __might_resched.cold (kernel/sched/core.c:9234)
[   12.164766][  T159]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   12.164771][  T159]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   12.164778][  T159]  __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))
[   12.164782][  T159]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   12.164790][  T159]  ? 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)
[   12.164794][  T159]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   12.164799][  T159]  put_chars (drivers/char/virtio_console.c:1176)
[   12.164804][  T159]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   12.164806][  T159]  ? printk_get_next_message (kernel/printk/printk.c:3072)
[   12.164812][  T159]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   12.164816][  T159]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   12.164823][  T159]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   12.164827][  T159]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.164829][  T159]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.164837][  T159]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   12.164842][  T159]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.164847][  T159]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.164853][  T159]  console_emit_next_record (kernel/printk/printk.c:3183)
[   12.164859][  T159]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   12.164867][  T159]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.164875][  T159]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.164881][  T159]  console_flush_one_record (kernel/printk/printk.c:3268)
[   12.164888][  T159]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   12.164891][  T159]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.164900][  T159]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   12.164904][  T159]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   12.164907][  T159]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.164910][  T159]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   12.164916][  T159]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   12.164918][  T159]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   12.164924][  T159]  vprintk_emit (kernel/printk/printk.c:2479)
[   12.164930][  T159]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   12.164935][  T159]  ? _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)
[   12.164944][  T159]  devkmsg_emit.constprop.0 (kernel/printk/printk.c:733)
[   12.164950][  T159]  ? vprintk_emit.cold (kernel/printk/printk.c:2449)
[   12.164957][  T159]  ? __kmalloc_noprof (mm/slub.c:5415 mm/slub.c:5439)
[   12.164960][  T159]  ? idr_get_free (??:?)
[   12.164965][  T159]  ? devkmsg_write (./include/linux/slab.h:995 kernel/printk/printk.c:762)
[   12.164970][  T159]  ? _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)
[   12.164975][  T159]  devkmsg_write.cold (kernel/printk/printk.c:796)
[   12.164979][  T159]  ? vprintk_default (kernel/printk/printk.c:2494)
[   12.164982][  T159]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.164985][  T159]  ? vfs_lock_file (./include/linux/fs.h:1348)
[   12.164992][  T159]  ? vprintk_default (kernel/printk/printk.c:2494)
[   12.164996][  T159]  new_sync_write (fs/read_write.c:595)
[   12.165004][  T159]  ? new_sync_read (./include/linux/ioprio.h:41)
[   12.165006][  T159]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   12.165021][  T159]  vfs_write (fs/read_write.c:687)
[   12.165029][  T159]  ksys_write (fs/read_write.c:739)
[   12.165033][  T159]  ? __ia32_sys_read (fs/read_write.c:723)
[   12.165036][  T159]  ? 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)
[   12.165040][  T159]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.165046][  T159]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   12.165050][  T159]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   12.165055][  T159]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   12.165058][  T159] RIP: 0033:0x7f771c51754e
[   12.165063][  T159] 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
[   12.165066][  T159] RSP: 002b:00007ffd046f9160 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[   12.165071][  T159] RAX: ffffffffffffffda RBX: 00007f771c698580 RCX: 00007f771c51754e
[   12.165073][  T159] RDX: 0000000000000023 RSI: 000055e96d963490 RDI: 0000000000000001
[   12.165074][  T159] RBP: 00007ffd046f9170 R08: 0000000000000000 R09: 0000000000000000
[   12.165076][  T159] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000023


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