======================================
| [   11.707123][  T158] softirqs last disabled at (186506): 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))
| [   11.707126][  T158] Preemption disabled at:
| [   11.707126][  T158] vprintk_emit (kernel/printk/printk.c:2471)
| [   11.707136][  T158] Tainted: [W]=WARN
[   11.707137][  T158] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   11.707139][  T158] Call Trace:
[   11.707141][  T158]  <TASK>
[   11.707142][  T158]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   11.707147][  T158]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   11.707150][  T158]  __might_resched.cold (kernel/sched/core.c:9234)
[   11.707154][  T158]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   11.707158][  T158]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   11.707163][  T158]  __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))
[   11.707165][  T158]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   11.707171][  T158]  ? 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)
[   11.707174][  T158]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   11.707177][  T158]  put_chars (drivers/char/virtio_console.c:1176)
[   11.707180][  T158]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   11.707181][  T158]  ? printk_get_next_message (kernel/printk/printk.c:3072)
[   11.707185][  T158]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   11.707188][  T158]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   11.707192][  T158]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   11.707195][  T158]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.707197][  T158]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.707201][  T158]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   11.707204][  T158]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.707208][  T158]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   11.707211][  T158]  console_emit_next_record (kernel/printk/printk.c:3183)
[   11.707215][  T158]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   11.707220][  T158]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.707222][  T158]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   11.707226][  T158]  console_flush_one_record (kernel/printk/printk.c:3268)
[   11.707230][  T158]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   11.707231][  T158]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.707236][  T158]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   11.707239][  T158]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   11.707241][  T158]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.707243][  T158]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   11.707246][  T158]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   11.707248][  T158]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   11.707251][  T158]  vprintk_emit (kernel/printk/printk.c:2479)
[   11.707255][  T158]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   11.707258][  T158]  ? _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)
[   11.707264][  T158]  devkmsg_emit.constprop.0 (kernel/printk/printk.c:733)
[   11.707268][  T158]  ? vprintk_emit.cold (kernel/printk/printk.c:2449)
[   11.707272][  T158]  ? __kmalloc_noprof (mm/slub.c:5415 mm/slub.c:5439)
[   11.707274][  T158]  ? idr_get_free (??:?)
[   11.707278][  T158]  ? devkmsg_write (./include/linux/slab.h:995 kernel/printk/printk.c:762)
[   11.707281][  T158]  ? _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)
[   11.707284][  T158]  devkmsg_write.cold (kernel/printk/printk.c:796)
[   11.707286][  T158]  ? vprintk_default (kernel/printk/printk.c:2494)
[   11.707288][  T158]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.707290][  T158]  ? vfs_lock_file (./include/linux/fs.h:1348)
[   11.707295][  T158]  ? vprintk_default (kernel/printk/printk.c:2494)
[   11.707297][  T158]  new_sync_write (fs/read_write.c:595)
[   11.707302][  T158]  ? new_sync_read (./include/linux/ioprio.h:41)
[   11.707304][  T158]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   11.707312][  T158]  vfs_write (fs/read_write.c:687)
[   11.707316][  T158]  ksys_write (fs/read_write.c:739)
[   11.707319][  T158]  ? __ia32_sys_read (fs/read_write.c:723)
[   11.707321][  T158]  ? 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)
[   11.707323][  T158]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.707327][  T158]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   11.707330][  T158]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   11.707333][  T158]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   11.707335][  T158] RIP: 0033:0x7f79aaa9554e
[   11.707339][  T158] 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
[   11.707341][  T158] RSP: 002b:00007ffdd3521bf0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[   11.707344][  T158] RAX: ffffffffffffffda RBX: 00007f79aac16580 RCX: 00007f79aaa9554e
[   11.707346][  T158] RDX: 0000000000000023 RSI: 000055dffaf43d20 RDI: 0000000000000001
[   11.707347][  T158] RBP: 00007ffdd3521c00 R08: 0000000000000000 R09: 0000000000000000
[   11.707348][  T158] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000023
[   11.707349][  T158] R13: 0000000000000023 R14: 000055dffaf43d20 R15: 0000000000000000
| [   14.858323][  T158] softirqs last disabled at (377107): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   14.858326][  T158] Preemption disabled at:
| [   14.858327][  T158] vprintk_emit (kernel/printk/printk.c:2471)
| [   14.858337][  T158] Tainted: [W]=WARN
[   14.858338][  T158] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.858340][  T158] Call Trace:
[   14.858342][  T158]  <TASK>
[   14.858343][  T158]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   14.858349][  T158]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   14.858351][  T158]  __might_resched.cold (kernel/sched/core.c:9234)
[   14.858356][  T158]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   14.858360][  T158]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   14.858364][  T158]  __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))
[   14.858367][  T158]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   14.858373][  T158]  ? 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)
[   14.858375][  T158]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   14.858379][  T158]  put_chars (drivers/char/virtio_console.c:1176)
[   14.858382][  T158]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   14.858383][  T158]  ? printk_get_next_message (kernel/printk/printk.c:3072)
[   14.858386][  T158]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   14.858389][  T158]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   14.858394][  T158]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   14.858401][  T158]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   14.858403][  T158]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   14.858407][  T158]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   14.858410][  T158]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   14.858413][  T158]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   14.858417][  T158]  console_emit_next_record (kernel/printk/printk.c:3183)
[   14.858421][  T158]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   14.858425][  T158]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   14.858428][  T158]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   14.858431][  T158]  console_flush_one_record (kernel/printk/printk.c:3268)
[   14.858435][  T158]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   14.858437][  T158]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   14.858442][  T158]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   14.858445][  T158]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   14.858447][  T158]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   14.858449][  T158]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   14.858452][  T158]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   14.858454][  T158]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   14.858457][  T158]  vprintk_emit (kernel/printk/printk.c:2479)
[   14.858461][  T158]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   14.858464][  T158]  ? _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)
[   14.858470][  T158]  devkmsg_emit.constprop.0 (kernel/printk/printk.c:733)
[   14.858474][  T158]  ? vprintk_emit.cold (kernel/printk/printk.c:2449)
[   14.858478][  T158]  ? __kmalloc_noprof (mm/slub.c:5415 mm/slub.c:5439)
[   14.858480][  T158]  ? idr_get_free (??:?)
[   14.858484][  T158]  ? devkmsg_write (./include/linux/slab.h:995 kernel/printk/printk.c:762)
[   14.858487][  T158]  ? _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)
[   14.858489][  T158]  devkmsg_write.cold (kernel/printk/printk.c:796)
[   14.858492][  T158]  ? vprintk_default (kernel/printk/printk.c:2494)
[   14.858494][  T158]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   14.858496][  T158]  ? vfs_lock_file (./include/linux/fs.h:1348)
[   14.858501][  T158]  ? vprintk_default (kernel/printk/printk.c:2494)
[   14.858503][  T158]  new_sync_write (fs/read_write.c:595)
[   14.858508][  T158]  ? new_sync_read (./include/linux/ioprio.h:41)
[   14.858510][  T158]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   14.858517][  T158]  vfs_write (fs/read_write.c:687)
[   14.858522][  T158]  ksys_write (fs/read_write.c:739)
[   14.858525][  T158]  ? __ia32_sys_read (fs/read_write.c:723)
[   14.858527][  T158]  ? 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)
[   14.858529][  T158]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   14.858533][  T158]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   14.858535][  T158]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   14.858538][  T158]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   14.858541][  T158] RIP: 0033:0x7f79aaa9554e
[   14.858545][  T158] 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
[   14.858547][  T158] RSP: 002b:00007ffdd3521bf0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[   14.858550][  T158] RAX: ffffffffffffffda RBX: 00007f79aac16580 RCX: 00007f79aaa9554e
[   14.858551][  T158] RDX: 0000000000000023 RSI: 000055dffaf43d20 RDI: 0000000000000001
[   14.858552][  T158] RBP: 00007ffdd3521c00 R08: 0000000000000000 R09: 0000000000000000
[   14.858553][  T158] 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