======================================
| [   11.007842][  T158] softirqs last disabled at (162168): 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))
| [   11.007844][  T158] Preemption disabled at:
| [   11.007845][  T158] vprintk_emit (kernel/printk/printk.c:2471)
| [   11.007853][  T158] Tainted: [W]=WARN
[   11.007854][  T158] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   11.007856][  T158] Call Trace:
[   11.007858][  T158]  <TASK>
[   11.007859][  T158]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   11.007864][  T158]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   11.007866][  T158]  __might_resched.cold (kernel/sched/core.c:9234)
[   11.007871][  T158]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   11.007875][  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)
[   11.007879][  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))
[   11.007881][  T158]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   11.007887][  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)
[   11.007889][  T158]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   11.007892][  T158]  put_chars (drivers/char/virtio_console.c:1176)
[   11.007895][  T158]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   11.007896][  T158]  ? printk_get_next_message (kernel/printk/printk.c:3072)
[   11.007900][  T158]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   11.007902][  T158]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   11.007907][  T158]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   11.007909][  T158]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.007911][  T158]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.007915][  T158]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   11.007918][  T158]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.007921][  T158]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   11.007924][  T158]  console_emit_next_record (kernel/printk/printk.c:3183)
[   11.007928][  T158]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   11.007932][  T158]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.007934][  T158]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   11.007938][  T158]  console_flush_one_record (kernel/printk/printk.c:3268)
[   11.007941][  T158]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   11.007943][  T158]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.007948][  T158]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   11.007950][  T158]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   11.007952][  T158]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.007954][  T158]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   11.007957][  T158]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   11.007958][  T158]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   11.007961][  T158]  vprintk_emit (kernel/printk/printk.c:2479)
[   11.007965][  T158]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   11.007968][  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)
[   11.007973][  T158]  devkmsg_emit.constprop.0 (kernel/printk/printk.c:733)
[   11.007977][  T158]  ? vprintk_emit.cold (kernel/printk/printk.c:2449)
[   11.007981][  T158]  ? __kmalloc_noprof (mm/slub.c:5415 mm/slub.c:5439)
[   11.007983][  T158]  ? idr_get_free (??:?)
[   11.007986][  T158]  ? devkmsg_write (./include/linux/slab.h:995 kernel/printk/printk.c:762)
[   11.007989][  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)
[   11.007992][  T158]  devkmsg_write.cold (kernel/printk/printk.c:796)
[   11.007995][  T158]  ? vprintk_default (kernel/printk/printk.c:2494)
[   11.007996][  T158]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.007998][  T158]  ? vfs_lock_file (./include/linux/fs.h:1348)
[   11.008003][  T158]  ? vprintk_default (kernel/printk/printk.c:2494)
[   11.008005][  T158]  new_sync_write (fs/read_write.c:595)
[   11.008010][  T158]  ? new_sync_read (./include/linux/ioprio.h:41)
[   11.008011][  T158]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   11.008019][  T158]  vfs_write (fs/read_write.c:687)
[   11.008023][  T158]  ksys_write (fs/read_write.c:739)
[   11.008026][  T158]  ? __ia32_sys_read (fs/read_write.c:723)
[   11.008028][  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)
[   11.008030][  T158]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.008033][  T158]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   11.008036][  T158]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   11.008039][  T158]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   11.008041][  T158] RIP: 0033:0x7f95d9a0654e
[   11.008045][  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
[   11.008047][  T158] RSP: 002b:00007ffee2cb3f50 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[   11.008050][  T158] RAX: ffffffffffffffda RBX: 00007f95d9b87580 RCX: 00007f95d9a0654e
[   11.008051][  T158] RDX: 0000000000000023 RSI: 00005563a6aebd20 RDI: 0000000000000001
[   11.008052][  T158] RBP: 00007ffee2cb3f60 R08: 0000000000000000 R09: 0000000000000000
[   11.008053][  T158] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000023
[   11.008054][  T158] R13: 0000000000000023 R14: 00005563a6aebd20 R15: 0000000000000000
| [   13.942717][  T158] softirqs last disabled at (368448): 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))
| [   13.942719][  T158] Preemption disabled at:
| [   13.942720][  T158] vprintk_emit (kernel/printk/printk.c:2471)
| [   13.942729][  T158] Tainted: [W]=WARN
[   13.942729][  T158] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   13.942731][  T158] Call Trace:
[   13.942733][  T158]  <TASK>
[   13.942734][  T158]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   13.942740][  T158]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   13.942742][  T158]  __might_resched.cold (kernel/sched/core.c:9234)
[   13.942746][  T158]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   13.942750][  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)
[   13.942755][  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))
[   13.942757][  T158]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   13.942763][  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)
[   13.942765][  T158]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   13.942768][  T158]  put_chars (drivers/char/virtio_console.c:1176)
[   13.942771][  T158]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   13.942772][  T158]  ? printk_get_next_message (kernel/printk/printk.c:3072)
[   13.942775][  T158]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   13.942778][  T158]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   13.942782][  T158]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   13.942785][  T158]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   13.942786][  T158]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   13.942790][  T158]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   13.942793][  T158]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.942796][  T158]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   13.942800][  T158]  console_emit_next_record (kernel/printk/printk.c:3183)
[   13.942803][  T158]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   13.942807][  T158]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.942809][  T158]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   13.942813][  T158]  console_flush_one_record (kernel/printk/printk.c:3268)
[   13.942817][  T158]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   13.942818][  T158]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   13.942823][  T158]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   13.942826][  T158]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   13.942827][  T158]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.942829][  T158]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   13.942833][  T158]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   13.942834][  T158]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   13.942837][  T158]  vprintk_emit (kernel/printk/printk.c:2479)
[   13.942840][  T158]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   13.942843][  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)
[   13.942849][  T158]  devkmsg_emit.constprop.0 (kernel/printk/printk.c:733)
[   13.942853][  T158]  ? vprintk_emit.cold (kernel/printk/printk.c:2449)
[   13.942857][  T158]  ? __kmalloc_noprof (mm/slub.c:5415 mm/slub.c:5439)
[   13.942859][  T158]  ? idr_get_free (??:?)
[   13.942863][  T158]  ? devkmsg_write (./include/linux/slab.h:995 kernel/printk/printk.c:762)
[   13.942865][  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)
[   13.942868][  T158]  devkmsg_write.cold (kernel/printk/printk.c:796)
[   13.942871][  T158]  ? vprintk_default (kernel/printk/printk.c:2494)
[   13.942872][  T158]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   13.942874][  T158]  ? vfs_lock_file (./include/linux/fs.h:1348)
[   13.942879][  T158]  ? vprintk_default (kernel/printk/printk.c:2494)
[   13.942881][  T158]  new_sync_write (fs/read_write.c:595)
[   13.942886][  T158]  ? new_sync_read (./include/linux/ioprio.h:41)
[   13.942887][  T158]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   13.942895][  T158]  vfs_write (fs/read_write.c:687)
[   13.942899][  T158]  ksys_write (fs/read_write.c:739)
[   13.942902][  T158]  ? __ia32_sys_read (fs/read_write.c:723)
[   13.942904][  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)
[   13.942906][  T158]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.942909][  T158]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   13.942912][  T158]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   13.942915][  T158]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   13.942917][  T158] RIP: 0033:0x7f95d9a0654e
[   13.942921][  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
[   13.942923][  T158] RSP: 002b:00007ffee2cb3f50 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[   13.942925][  T158] RAX: ffffffffffffffda RBX: 00007f95d9b87580 RCX: 00007f95d9a0654e
[   13.942927][  T158] RDX: 0000000000000023 RSI: 00005563a6aebd20 RDI: 0000000000000001
[   13.942928][  T158] RBP: 00007ffee2cb3f60 R08: 0000000000000000 R09: 0000000000000000
[   13.942929][  T158] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000023


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