======================================
| # 89.53 [+0.00] [  764.399369] [    C0] hardirqs last  enabled at (408178): irqentry_exit (kernel/entry/common.c:220)
| # 89.53 [+0.00] [  764.399379] [    C0] hardirqs last disabled at (408179): sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1056)
| # 89.54 [+0.00] [  764.399381] [    C0] softirqs last  enabled at (0): copy_process (kernel/fork.c:2168 (discriminator 1))
| # 89.54 [+0.00] [  764.399386] [    C0] softirqs last disabled at (4023): irq_exit_rcu (kernel/softirq.c:657 kernel/softirq.c:496 kernel/softirq.c:723 kernel/softirq.c:739)
# 89.55 [+0.00] [  764.399395] [    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
# 89.55 [+0.00] [  764.399397] [    C0] Stopper: 0x0 <- 0x0
# 89.55 [+0.00] [  764.399403] [    C0] RIP: 0010:_raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:160 kernel/locking/spinlock.c:202)
# 89.56 [+0.00] [  764.399407] [    C0] Code: 0f 1f 44 00 00 53 48 8b 74 24 08 48 89 fb 48 83 c7 18 e8 a5 87 df fd 48 89 df e8 0d d9 df fd e8 18 4a 05 fe fb bf 01 00 00 00 <e8> 4d 2f d3 fd 65 8b 05 26 f2 05 02 85 c0 74 02 5b c3 e8 4b e7 87
All code
========
   0:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   5:	53                   	push   %rbx
   6:	48 8b 74 24 08       	mov    0x8(%rsp),%rsi
   b:	48 89 fb             	mov    %rdi,%rbx
   e:	48 83 c7 18          	add    $0x18,%rdi
  12:	e8 a5 87 df fd       	call   0xfffffffffddf87bc
  17:	48 89 df             	mov    %rbx,%rdi
  1a:	e8 0d d9 df fd       	call   0xfffffffffddfd92c
  1f:	e8 18 4a 05 fe       	call   0xfffffffffe054a3c
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
  2a:*	e8 4d 2f d3 fd       	call   0xfffffffffdd32f7c		<-- trapping instruction
  2f:	65 8b 05 26 f2 05 02 	mov    %gs:0x205f226(%rip),%eax        # 0x205f25c
  36:	85 c0                	test   %eax,%eax
  38:	74 02                	je     0x3c
  3a:	5b                   	pop    %rbx
  3b:	c3                   	ret
  3c:	e8                   	.byte 0xe8
  3d:	4b e7 87             	rex.WXB out %eax,$0x87

Code starting with the faulting instruction
===========================================
   0:	e8 4d 2f d3 fd       	call   0xfffffffffdd32f52
   5:	65 8b 05 26 f2 05 02 	mov    %gs:0x205f226(%rip),%eax        # 0x205f232
   c:	85 c0                	test   %eax,%eax
   e:	74 02                	je     0x12
  10:	5b                   	pop    %rbx
  11:	c3                   	ret
  12:	e8                   	.byte 0xe8
  13:	4b e7 87             	rex.WXB out %eax,$0x87
# 89.56 [+0.01] [  764.399409] [    C0] RSP: 0018:ffa0000000007d40 EFLAGS: 00000282
# 89.57 [+0.00] [  764.399411] [    C0] RAX: 0000000000062b92 RBX: ff110000352252c0 RCX: ffffffffb00eadf8
# 89.57 [+0.00] [  764.399412] [    C0] RDX: ff11000001b44540 RSI: ffffffffb09b3844 RDI: 0000000000000001
# 89.57 [+0.00] [  764.399413] [    C0] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
# 89.58 [+0.00] [  764.399414] [    C0] R10: 0000000000000000 R11: 0000000000000001 R12: fff3fc0000000fc3
# 89.58 [+0.00] [  764.399415] [    C0] R13: ff11000035233ab0 R14: ff110000352252c0 R15: ffa0000000007e18
# 89.58 [+0.00] [  764.399417] [    C0] FS:  0000000000000000(0000) GS:ff110000830d6000(0000) knlGS:0000000000000000
# 89.59 [+0.00] [  764.399421] [    C0] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
# 89.59 [+0.00] [  764.399422] [    C0] CR2: 00007f7bcf720000 CR3: 000000001a8af002 CR4: 0000000000771ef0
# 89.59 [+0.00] [  764.399423] [    C0] PKRU: 55555554
# 89.59 [+0.00] [  764.399424] [    C0] Call Trace:
# 89.59 [+0.00] [  764.399427] [    C0]  <IRQ>
# 89.60 [+0.00] [  764.399430] [    C0]  __run_timers (kernel/time/timer.c:1799 kernel/time/timer.c:2373)
# 89.60 [+0.00] [  764.399435] [    C0]  ? crng_reseed (drivers/char/random.c:1078)
# 89.60 [+0.00] [  764.399440] [    C0]  ? find_held_lock (kernel/locking/lockdep.c:5350 (discriminator 1))
# 89.60 [+0.00] [  764.399444] [    C0]  ? __bpf_trace_itimer_expire (kernel/time/timer.c:2344)
# 89.60 [+0.00] [  764.399446] [    C0]  ? __lock_acquire (kernel/locking/lockdep.c:5237 (discriminator 1))
# 89.61 [+0.00] [  764.399452] [    C0]  ? __rwlock_init (kernel/locking/spinlock_debug.c:114)
# 89.61 [+0.00] [  764.399454] [    C0]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 33) kernel/locking/lockdep.c:5831 (discriminator 33))
# 89.61 [+0.00] [  764.399458] [    C0]  run_timer_softirq (kernel/time/timer.c:2386 kernel/time/timer.c:2394 kernel/time/timer.c:2402)
# 89.61 [+0.00] [  764.399461] [    C0]  ? __run_timers (kernel/time/timer.c:2401)
# 89.61 [+0.00] [  764.399463] [    C0]  ? handle_softirqs (kernel/softirq.c:608)
# 89.62 [+0.00] [  764.399465] [    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 1) kernel/rcu/tree.c:751 (discriminator 1))
# 89.62 [+0.00] [  764.399467] [    C0]  handle_softirqs (./arch/x86/include/asm/jump_label.h:37 ./include/trace/events/irq.h:142 kernel/softirq.c:623)
# 89.62 [+0.00] [  764.399471] [    C0]  ? _local_bh_enable (kernel/softirq.c:580)
# 89.62 [+0.00] [  764.399474] [    C0]  ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
# 89.62 [+0.00] [  764.399477] [    C0]  irq_exit_rcu (kernel/softirq.c:657 kernel/softirq.c:496 kernel/softirq.c:723 kernel/softirq.c:739)
# 89.62 [+0.00] [  764.399479] [    C0]  common_interrupt (arch/x86/kernel/irq.c:319 (discriminator 49))
# 89.63 [+0.00] [  764.399482] [    C0]  </IRQ>
# 89.63 [+0.00] [  764.399483] [    C0]  <TASK>
# 89.63 [+0.00] [  764.399484] [    C0]  asm_common_interrupt (./arch/x86/include/asm/idtentry.h:688)
# 89.63 [+0.00] [  764.399487] [    C0] RIP: 0010:finish_task_switch.isra.0 (kernel/sched/core.c:5137)
# 89.63 [+0.00] [  764.399490] [    C0] Code: 04 00 00 8b 05 b3 8c a0 03 48 85 d2 0f 85 a3 03 00 00 85 c0 0f 85 ab 02 00 00 48 89 df e8 a6 17 2c 02 e8 71 62 31 00 fb 66 90 <48> 83 7d d0 00 74 4d 49 8d bd 18 05 00 00 48 b8 00 00 00 00 00 fc
All code
========
   0:	04 00                	add    $0x0,%al
   2:	00 8b 05 b3 8c a0    	add    %cl,-0x5f734cfb(%rbx)
   8:	03 48 85             	add    -0x7b(%rax),%ecx
   b:	d2 0f                	rorb   %cl,(%rdi)
   d:	85 a3 03 00 00 85    	test   %esp,-0x7afffffd(%rbx)
  13:	c0 0f 85             	rorb   $0x85,(%rdi)
  16:	ab                   	stos   %eax,(%rdi)
  17:	02 00                	add    (%rax),%al
  19:	00 48 89             	add    %cl,-0x77(%rax)
  1c:	df e8                	fucomip %st(0),%st
  1e:	a6                   	cmpsb  (%rdi),(%rsi)
  1f:	17                   	(bad)
  20:	2c 02                	sub    $0x2,%al
  22:	e8 71 62 31 00       	call   0x316298
  27:	fb                   	sti
  28:	66 90                	xchg   %ax,%ax
  2a:*	48 83 7d d0 00       	cmpq   $0x0,-0x30(%rbp)		<-- trapping instruction
  2f:	74 4d                	je     0x7e
  31:	49 8d bd 18 05 00 00 	lea    0x518(%r13),%rdi
  38:	48                   	rex.W
  39:	b8 00 00 00 00       	mov    $0x0,%eax
  3e:	00 fc                	add    %bh,%ah

Code starting with the faulting instruction
===========================================
   0:	48 83 7d d0 00       	cmpq   $0x0,-0x30(%rbp)
   5:	74 4d                	je     0x54
   7:	49 8d bd 18 05 00 00 	lea    0x518(%r13),%rdi
   e:	48                   	rex.W
   f:	b8 00 00 00 00       	mov    $0x0,%eax
  14:	00 fc                	add    %bh,%ah
# 89.64 [+0.01] [  764.399491] [    C0] RSP: 0018:ffa0000000127c60 EFLAGS: 00000282
# 89.64 [+0.00] [  764.399492] [    C0] RAX: 0000000000000fb5 RBX: ff11000035237280 RCX: ffffffffade2959f
# 89.65 [+0.00] [  764.399493] [    C0] RDX: ff11000001b44540 RSI: ffffffffb09b3844 RDI: ffffffffb046ad00
# 89.65 [+0.00] [  764.399494] [    C0] RBP: ffa0000000127ca8 R08: 0000000000000000 R09: 0000000000000001
# 89.65 [+0.00] [  764.399495] [    C0] R10: 0000000000000000 R11: 0000000000000001 R12: ff11000001ada2c0
# 89.66 [+0.00] [  764.399495] [    C0] R13: ff11000001b44540 R14: ffffffffb1832234 R15: ff11000035237298
# 89.66 [+0.00] [  764.399498] [    C0]  ? finish_task_switch.isra.0 (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/sched/sched.h:1570 kernel/sched/core.c:4995 kernel/sched/core.c:5112)
# 89.66 [+0.00] [  764.399504] [    C0]  __schedule (kernel/sched/core.c:5259)
# 89.66 [+0.00] [  764.399508] [    C0]  ? io_schedule_timeout (kernel/sched/core.c:6719)
# 89.67 [+0.00] [  764.399511] [    C0]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5536)
# 89.67 [+0.00] [  764.399515] [    C0]  schedule (kernel/sched/core.c:6946 kernel/sched/core.c:6960)
# 89.67 [+0.00] [  764.399517] [    C0]  smpboot_thread_fn (kernel/smpboot.c:156)
# 89.67 [+0.00] [  764.399521] [    C0]  ? sort_range (kernel/smpboot.c:103)
# 89.67 [+0.00] [  764.399523] [    C0]  kthread (kernel/kthread.c:463)
# 89.67 [+0.00] [  764.399526] [    C0]  ? kthread_is_per_cpu (kernel/kthread.c:412)
# 89.68 [+0.00] [  764.399527] [    C0]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5536)
# 89.68 [+0.00] [  764.399530] [    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 1) kernel/rcu/tree.c:751 (discriminator 1))
# 89.68 [+0.00] [  764.399531] [    C0]  ? kthread_is_per_cpu (kernel/kthread.c:412)
# 89.68 [+0.00] [  764.399533] [    C0]  ret_from_fork (arch/x86/kernel/process.c:164)
# 89.69 [+0.00] [  764.399537] [    C0]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
# 89.69 [+0.00] [  764.399541] [    C0]  ? __switch_to (./arch/x86/include/asm/cpufeature.h:101 arch/x86/kernel/process_64.c:377 arch/x86/kernel/process_64.c:665)
# 89.69 [+0.00] [  764.399543] [    C0]  ? kthread_is_per_cpu (kernel/kthread.c:412)
# 89.69 [+0.00] [  764.399545] [    C0]  ret_from_fork_asm (arch/x86/entry/entry_64.S:256)
| [  764.399369][    C0] hardirqs last  enabled at (408178): irqentry_exit (kernel/entry/common.c:220)
| [  764.399379][    C0] hardirqs last disabled at (408179): sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1056)
| [  764.399381][    C0] softirqs last  enabled at (0): copy_process (kernel/fork.c:2168 (discriminator 1))
| [  764.399386][    C0] softirqs last disabled at (4023): irq_exit_rcu (kernel/softirq.c:657 kernel/softirq.c:496 kernel/softirq.c:723 kernel/softirq.c:739)
[  764.399395][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  764.399397][    C0] Stopper: 0x0 <- 0x0
[  764.399403][    C0] RIP: 0010:_raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:160 kernel/locking/spinlock.c:202)
[  764.399407][    C0] Code: 0f 1f 44 00 00 53 48 8b 74 24 08 48 89 fb 48 83 c7 18 e8 a5 87 df fd 48 89 df e8 0d d9 df fd e8 18 4a 05 fe fb bf 01 00 00 00 <e8> 4d 2f d3 fd 65 8b 05 26 f2 05 02 85 c0 74 02 5b c3 e8 4b e7 87
All code
========
   0:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   5:	53                   	push   %rbx
   6:	48 8b 74 24 08       	mov    0x8(%rsp),%rsi
   b:	48 89 fb             	mov    %rdi,%rbx
   e:	48 83 c7 18          	add    $0x18,%rdi
  12:	e8 a5 87 df fd       	call   0xfffffffffddf87bc
  17:	48 89 df             	mov    %rbx,%rdi
  1a:	e8 0d d9 df fd       	call   0xfffffffffddfd92c
  1f:	e8 18 4a 05 fe       	call   0xfffffffffe054a3c
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
  2a:*	e8 4d 2f d3 fd       	call   0xfffffffffdd32f7c		<-- trapping instruction
  2f:	65 8b 05 26 f2 05 02 	mov    %gs:0x205f226(%rip),%eax        # 0x205f25c
  36:	85 c0                	test   %eax,%eax
  38:	74 02                	je     0x3c
  3a:	5b                   	pop    %rbx
  3b:	c3                   	ret
  3c:	e8                   	.byte 0xe8
  3d:	4b e7 87             	rex.WXB out %eax,$0x87

Code starting with the faulting instruction
===========================================
   0:	e8 4d 2f d3 fd       	call   0xfffffffffdd32f52
   5:	65 8b 05 26 f2 05 02 	mov    %gs:0x205f226(%rip),%eax        # 0x205f232
   c:	85 c0                	test   %eax,%eax
   e:	74 02                	je     0x12
  10:	5b                   	pop    %rbx
  11:	c3                   	ret
  12:	e8                   	.byte 0xe8
  13:	4b e7 87             	rex.WXB out %eax,$0x87
[  764.399409][    C0] RSP: 0018:ffa0000000007d40 EFLAGS: 00000282
[  764.399411][    C0] RAX: 0000000000062b92 RBX: ff110000352252c0 RCX: ffffffffb00eadf8
[  764.399412][    C0] RDX: ff11000001b44540 RSI: ffffffffb09b3844 RDI: 0000000000000001
[  764.399413][    C0] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
[  764.399414][    C0] R10: 0000000000000000 R11: 0000000000000001 R12: fff3fc0000000fc3
[  764.399415][    C0] R13: ff11000035233ab0 R14: ff110000352252c0 R15: ffa0000000007e18
[  764.399417][    C0] FS:  0000000000000000(0000) GS:ff110000830d6000(0000) knlGS:0000000000000000
[  764.399421][    C0] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  764.399422][    C0] CR2: 00007f7bcf720000 CR3: 000000001a8af002 CR4: 0000000000771ef0
[  764.399423][    C0] PKRU: 55555554
[  764.399424][    C0] Call Trace:
[  764.399427][    C0]  <IRQ>
[  764.399430][    C0]  __run_timers (kernel/time/timer.c:1799 kernel/time/timer.c:2373)
[  764.399435][    C0]  ? crng_reseed (drivers/char/random.c:1078)
[  764.399440][    C0]  ? find_held_lock (kernel/locking/lockdep.c:5350 (discriminator 1))
[  764.399444][    C0]  ? __bpf_trace_itimer_expire (kernel/time/timer.c:2344)
[  764.399446][    C0]  ? __lock_acquire (kernel/locking/lockdep.c:5237 (discriminator 1))
[  764.399452][    C0]  ? __rwlock_init (kernel/locking/spinlock_debug.c:114)
[  764.399454][    C0]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 33) kernel/locking/lockdep.c:5831 (discriminator 33))
[  764.399458][    C0]  run_timer_softirq (kernel/time/timer.c:2386 kernel/time/timer.c:2394 kernel/time/timer.c:2402)
[  764.399461][    C0]  ? __run_timers (kernel/time/timer.c:2401)
[  764.399463][    C0]  ? handle_softirqs (kernel/softirq.c:608)
[  764.399465][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 1) kernel/rcu/tree.c:751 (discriminator 1))
[  764.399467][    C0]  handle_softirqs (./arch/x86/include/asm/jump_label.h:37 ./include/trace/events/irq.h:142 kernel/softirq.c:623)
[  764.399471][    C0]  ? _local_bh_enable (kernel/softirq.c:580)
[  764.399474][    C0]  ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[  764.399477][    C0]  irq_exit_rcu (kernel/softirq.c:657 kernel/softirq.c:496 kernel/softirq.c:723 kernel/softirq.c:739)
[  764.399479][    C0]  common_interrupt (arch/x86/kernel/irq.c:319 (discriminator 49))
[  764.399482][    C0]  </IRQ>
[  764.399483][    C0]  <TASK>
[  764.399484][    C0]  asm_common_interrupt (./arch/x86/include/asm/idtentry.h:688)
[  764.399487][    C0] RIP: 0010:finish_task_switch.isra.0 (kernel/sched/core.c:5137)
[  764.399490][    C0] Code: 04 00 00 8b 05 b3 8c a0 03 48 85 d2 0f 85 a3 03 00 00 85 c0 0f 85 ab 02 00 00 48 89 df e8 a6 17 2c 02 e8 71 62 31 00 fb 66 90 <48> 83 7d d0 00 74 4d 49 8d bd 18 05 00 00 48 b8 00 00 00 00 00 fc
All code
========
   0:	04 00                	add    $0x0,%al
   2:	00 8b 05 b3 8c a0    	add    %cl,-0x5f734cfb(%rbx)
   8:	03 48 85             	add    -0x7b(%rax),%ecx
   b:	d2 0f                	rorb   %cl,(%rdi)
   d:	85 a3 03 00 00 85    	test   %esp,-0x7afffffd(%rbx)
  13:	c0 0f 85             	rorb   $0x85,(%rdi)
  16:	ab                   	stos   %eax,(%rdi)
  17:	02 00                	add    (%rax),%al
  19:	00 48 89             	add    %cl,-0x77(%rax)
  1c:	df e8                	fucomip %st(0),%st
  1e:	a6                   	cmpsb  (%rdi),(%rsi)
  1f:	17                   	(bad)
  20:	2c 02                	sub    $0x2,%al
  22:	e8 71 62 31 00       	call   0x316298
  27:	fb                   	sti
  28:	66 90                	xchg   %ax,%ax
  2a:*	48 83 7d d0 00       	cmpq   $0x0,-0x30(%rbp)		<-- trapping instruction
  2f:	74 4d                	je     0x7e
  31:	49 8d bd 18 05 00 00 	lea    0x518(%r13),%rdi
  38:	48                   	rex.W
  39:	b8 00 00 00 00       	mov    $0x0,%eax
  3e:	00 fc                	add    %bh,%ah

Code starting with the faulting instruction
===========================================
   0:	48 83 7d d0 00       	cmpq   $0x0,-0x30(%rbp)
   5:	74 4d                	je     0x54
   7:	49 8d bd 18 05 00 00 	lea    0x518(%r13),%rdi
   e:	48                   	rex.W
   f:	b8 00 00 00 00       	mov    $0x0,%eax
  14:	00 fc                	add    %bh,%ah
[  764.399491][    C0] RSP: 0018:ffa0000000127c60 EFLAGS: 00000282
[  764.399492][    C0] RAX: 0000000000000fb5 RBX: ff11000035237280 RCX: ffffffffade2959f
[  764.399493][    C0] RDX: ff11000001b44540 RSI: ffffffffb09b3844 RDI: ffffffffb046ad00
[  764.399494][    C0] RBP: ffa0000000127ca8 R08: 0000000000000000 R09: 0000000000000001
[  764.399495][    C0] R10: 0000000000000000 R11: 0000000000000001 R12: ff11000001ada2c0
[  764.399495][    C0] R13: ff11000001b44540 R14: ffffffffb1832234 R15: ff11000035237298
[  764.399498][    C0]  ? finish_task_switch.isra.0 (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/sched/sched.h:1570 kernel/sched/core.c:4995 kernel/sched/core.c:5112)
[  764.399504][    C0]  __schedule (kernel/sched/core.c:5259)
[  764.399508][    C0]  ? io_schedule_timeout (kernel/sched/core.c:6719)
[  764.399511][    C0]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5536)
[  764.399515][    C0]  schedule (kernel/sched/core.c:6946 kernel/sched/core.c:6960)
[  764.399517][    C0]  smpboot_thread_fn (kernel/smpboot.c:156)
[  764.399521][    C0]  ? sort_range (kernel/smpboot.c:103)
[  764.399523][    C0]  kthread (kernel/kthread.c:463)
[  764.399526][    C0]  ? kthread_is_per_cpu (kernel/kthread.c:412)
[  764.399527][    C0]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5536)
[  764.399530][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 1) kernel/rcu/tree.c:751 (discriminator 1))
[  764.399531][    C0]  ? kthread_is_per_cpu (kernel/kthread.c:412)
[  764.399533][    C0]  ret_from_fork (arch/x86/kernel/process.c:164)
[  764.399537][    C0]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[  764.399541][    C0]  ? __switch_to (./arch/x86/include/asm/cpufeature.h:101 arch/x86/kernel/process_64.c:377 arch/x86/kernel/process_64.c:665)
[  764.399543][    C0]  ? kthread_is_per_cpu (kernel/kthread.c:412)


Finger prints:
irqentry_exit:sysvec_apic_timer_interrupt:copy_process:irq_exit_rcu:_raw_spin_unlock_irq