======================================
| [   43.987858][  T369] GACT probability NOT on
| [   63.201845][    C3] ------------[ cut here ]------------
| [   63.202193][    C3] kernel BUG at net/core/skbuff.c:3505!
| [   63.202488][    C3] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
[   63.202968][    C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   63.203368][    C3] Workqueue: events once_deferred
[ 63.203555][ C3] RIP: 0010:__skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 63.203722][ C3] Code: 44 89 14 24 ff d0 0f 1f 00 4c 8b 44 24 08 44 8b 14 24 41 89 c1 eb a5 89 e8 e9 2d fe ff ff 41 ff d5 0f 1f 00 e9 1f fa ff ff 90 <0f> 0b 48 8b 7c 24 10 89 54 24 48 48 89 44 24 40 e8 17 a6 91 fe 8b
All code
========
   0:	44 89 14 24          	mov    %r10d,(%rsp)
   4:	ff d0                	call   *%rax
   6:	0f 1f 00             	nopl   (%rax)
   9:	4c 8b 44 24 08       	mov    0x8(%rsp),%r8
   e:	44 8b 14 24          	mov    (%rsp),%r10d
  12:	41 89 c1             	mov    %eax,%r9d
  15:	eb a5                	jmp    0xffffffffffffffbc
  17:	89 e8                	mov    %ebp,%eax
  19:	e9 2d fe ff ff       	jmp    0xfffffffffffffe4b
  1e:	41 ff d5             	call   *%r13
  21:	0f 1f 00             	nopl   (%rax)
  24:	e9 1f fa ff ff       	jmp    0xfffffffffffffa48
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	48 8b 7c 24 10       	mov    0x10(%rsp),%rdi
  31:	89 54 24 48          	mov    %edx,0x48(%rsp)
  35:	48 89 44 24 40       	mov    %rax,0x40(%rsp)
  3a:	e8 17 a6 91 fe       	call   0xfffffffffe91a656
  3f:	8b                   	.byte 0x8b

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	48 8b 7c 24 10       	mov    0x10(%rsp),%rdi
   7:	89 54 24 48          	mov    %edx,0x48(%rsp)
   b:	48 89 44 24 40       	mov    %rax,0x40(%rsp)
  10:	e8 17 a6 91 fe       	call   0xfffffffffe91a62c
  15:	8b                   	.byte 0x8b
[   63.204284][    C3] RSP: 0018:ffffc90000278888 EFLAGS: 00010202
[   63.204490][    C3] RAX: 000000000000e831 RBX: 0000000000000008 RCX: 1ffff110011c29d9
[   63.204748][    C3] RDX: 0000000000000070 RSI: dffffc0000000000 RDI: ffff888008e14ec8
[   63.205012][    C3] RBP: 000000000000e831 R08: 0000000000000008 R09: ffffed1000561489
[   63.205251][    C3] R10: ffff88801f182988 R11: ffff888008e14c00 R12: 0000000000000008
[   63.205495][    C3] R13: 0000000000000000 R14: ffffc90000278948 R15: ffff88801f182988
[   63.205757][    C3] FS:  0000000000000000(0000) GS:ffff888036180000(0000) knlGS:0000000000000000
[   63.206064][    C3] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   63.206278][    C3] CR2: 00007f43308af550 CR3: 00000000076c4002 CR4: 0000000000770ef0
[   63.206525][    C3] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   63.206793][    C3] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   63.207058][    C3] PKRU: 55555554
[   63.207182][    C3] Call Trace:
[   63.207306][    C3]  <IRQ>
[ 63.207410][ C3] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) 
[ 63.207537][ C3] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) 
[ 63.207660][ C3] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 63.207858][ C3] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) 
[ 63.208028][ C3] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 63.208189][ C3] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 63.208468][ C3] ? handle_invalid_op (arch/x86/kernel/traps.c:213) 
[ 63.208627][ C3] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 63.208795][ C3] ? exc_invalid_op (arch/x86/kernel/traps.c:265) 
[ 63.208960][ C3] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 63.209245][ C3] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 63.209419][ C3] ? __skb_checksum (net/core/skbuff.c:3441 (discriminator 4)) 
[ 63.209595][ C3] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 63.209756][ C3] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 63.210064][ C3] __skb_checksum_complete (net/core/skbuff.c:3643) 
[ 63.210226][ C3] ? __pfx___skb_checksum_complete (net/core/skbuff.c:3637) 
[ 63.210467][ C3] ? __pfx_csum_partial_ext (./include/net/checksum.h:120) 
[ 63.210739][ C3] ? __pfx_csum_block_add_ext (./include/net/checksum.h:103) 
[ 63.210923][ C3] ? ipv6_raw_deliver (net/ipv6/raw.c:142) 
[ 63.211088][ C3] icmpv6_rcv (./include/linux/skbuff.h:4567 net/ipv6/icmp.c:921) 
[ 63.211253][ C3] ip6_protocol_deliver_rcu (net/ipv6/ip6_input.c:438 (discriminator 5)) 
[ 63.211555][ C3] ip6_input_finish (./include/linux/rcupdate.h:779 net/ipv6/ip6_input.c:484) 
[ 63.211717][ C3] ip6_input (./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv6/ip6_input.c:492) 
[ 63.211853][ C3] ? __pfx_ip6_input (net/ipv6/ip6_input.c:491) 
[ 63.212032][ C3] ? ip6_rcv_core (./include/net/sock.h:2827 net/ipv6/ip6_input.c:290) 
[ 63.212189][ C3] ipv6_rcv (./include/net/dst.h:460 net/ipv6/ip6_input.c:79 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv6/ip6_input.c:310) 
[ 63.212425][ C3] ? __pfx_ipv6_rcv (net/ipv6/ip6_input.c:304) 
[ 63.212591][ C3] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 63.212769][ C3] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 63.212927][ C3] ? __pfx_ipv6_rcv (net/ipv6/ip6_input.c:304) 
[ 63.213203][ C3] __netif_receive_skb_one_core (net/core/dev.c:5603) 
[ 63.213425][ C3] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603) 
[ 63.213634][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 63.213809][ C3] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 63.214069][ C3] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:6053) 
[ 63.214251][ C3] __napi_poll.constprop.0 (net/core/dev.c:6703) 
[ 63.214427][ C3] net_rx_action (net/core/dev.c:6772 net/core/dev.c:6886) 
[ 63.214605][ C3] ? __pfx_net_rx_action (net/core/dev.c:6850) 
[ 63.214765][ C3] ? hlock_class (kernel/locking/lockdep.c:223) 
[ 63.215069][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 63.215239][ C3] __do_softirq (kernel/softirq.c:553) 
[ 63.215421][ C3] irq_exit_rcu (kernel/softirq.c:427 kernel/softirq.c:632 kernel/softirq.c:644) 
[ 63.215563][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1076 (discriminator 14)) 
[   63.215729][    C3]  </IRQ>
[   63.215951][    C3]  <TASK>
[ 63.216038][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:649) 
[ 63.216237][ C3] RIP: 0010:__mutex_trylock_common (kernel/locking/mutex.c:125) 
[ 63.216459][ C3] Code: f3 65 48 8b 04 25 28 00 00 00 48 89 44 24 68 31 c0 e8 47 ac 67 00 4c 89 f8 48 c1 e8 03 80 3c 18 00 0f 85 b3 01 00 00 49 8b 07 <48> c7 c2 00 0b e4 8b 49 89 d4 48 89 44 24 30 49 c1 ec 03 48 b8 00
All code
========
   0:	f3 65 48 8b 04 25 28 	repz mov %gs:0x28,%rax
   7:	00 00 00 
   a:	48 89 44 24 68       	mov    %rax,0x68(%rsp)
   f:	31 c0                	xor    %eax,%eax
  11:	e8 47 ac 67 00       	call   0x67ac5d
  16:	4c 89 f8             	mov    %r15,%rax
  19:	48 c1 e8 03          	shr    $0x3,%rax
  1d:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
  21:	0f 85 b3 01 00 00    	jne    0x1da
  27:	49 8b 07             	mov    (%r15),%rax
  2a:*	48 c7 c2 00 0b e4 8b 	mov    $0xffffffff8be40b00,%rdx		<-- trapping instruction
  31:	49 89 d4             	mov    %rdx,%r12
  34:	48 89 44 24 30       	mov    %rax,0x30(%rsp)
  39:	49 c1 ec 03          	shr    $0x3,%r12
  3d:	48                   	rex.W
  3e:	b8                   	.byte 0xb8
	...

Code starting with the faulting instruction
===========================================
   0:	48 c7 c2 00 0b e4 8b 	mov    $0xffffffff8be40b00,%rdx
   7:	49 89 d4             	mov    %rdx,%r12
   a:	48 89 44 24 30       	mov    %rax,0x30(%rsp)
   f:	49 c1 ec 03          	shr    $0x3,%r12
  13:	48                   	rex.W
  14:	b8                   	.byte 0xb8
	...
[   63.217281][    C3] RSP: 0018:ffffc9000043fa70 EFLAGS: 00000246
[   63.217483][    C3] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff862c7519
[   63.217723][    C3] RDX: fffffbfff13406d1 RSI: 0000000000000008 RDI: ffffffff89a03680
[   63.217959][    C3] RBP: 1ffff92000087f50 R08: 0000000000000000 R09: fffffbfff13406d0
[   63.218193][    C3] R10: ffffffff89a03687 R11: ffff888004e00a58 R12: ffffffff89a03680
[   63.218524][    C3] R13: 0000000000000000 R14: ffff888004e00040 R15: ffffffff89a03680
[ 63.218769][ C3] ? __mutex_trylock_common (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2569 ./include/linux/atomic/atomic-long.h:38 ./include/linux/atomic/atomic-instrumented.h:3161 kernel/locking/mutex.c:107) 
[ 63.218930][ C3] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:104) 
[ 63.219132][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 63.219385][ C3] ? arch_jump_label_transform_queue (arch/x86/kernel/jump_label.c:137) 
[ 63.219586][ C3] __mutex_lock (kernel/locking/mutex.c:611 kernel/locking/mutex.c:752) 
[ 63.219747][ C3] ? arch_jump_label_transform_queue (arch/x86/kernel/jump_label.c:137) 
[ 63.219947][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 63.220200][ C3] ? static_key_disable_cpuslocked (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:1194 kernel/jump_label.c:234) 
[ 63.220401][ C3] ? arch_jump_label_transform_queue (arch/x86/kernel/jump_label.c:137) 
[ 63.220600][ C3] ? __pfx___mutex_lock (kernel/locking/mutex.c:751) 
[ 63.220759][ C3] ? __mutex_lock (./arch/x86/include/asm/preempt.h:94 kernel/locking/mutex.c:618 kernel/locking/mutex.c:752) 
[ 63.221009][ C3] ? static_key_disable_cpuslocked (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:1194 kernel/jump_label.c:234) 
[ 63.221207][ C3] ? __pfx___mutex_lock (kernel/locking/mutex.c:751) 
[ 63.221366][ C3] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 63.221524][ C3] ? arch_jump_label_transform_queue (arch/x86/kernel/jump_label.c:137) 
[ 63.221722][ C3] arch_jump_label_transform_queue (arch/x86/kernel/jump_label.c:137) 
[ 63.222015][ C3] ? kernel_text_address (kernel/extable.c:99) 
[ 63.222175][ C3] __jump_label_update (kernel/jump_label.c:475) 
[ 63.222332][ C3] ? jump_label_update (kernel/jump_label.c:819) 
[ 63.222495][ C3] static_key_disable_cpuslocked (kernel/jump_label.c:32 kernel/jump_label.c:236) 
[ 63.222690][ C3] static_key_disable (kernel/jump_label.c:245) 
[ 63.222945][ C3] once_deferred (lib/once.c:21 (discriminator 5)) 
[ 63.223129][ C3] process_one_work (kernel/workqueue.c:2633) 
[ 63.223296][ C3] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 63.223455][ C3] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 63.223617][ C3] ? assign_work (kernel/workqueue.c:1101) 
[ 63.223876][ C3] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 63.224035][ C3] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 63.224248][ C3] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 63.224402][ C3] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 63.224559][ C3] kthread (kernel/kthread.c:388) 
[ 63.224676][ C3] ? __pfx_kthread (kernel/kthread.c:341) 
[ 63.224828][ C3] ret_from_fork (arch/x86/kernel/process.c:147) 
[ 63.224981][ C3] ? __pfx_kthread (kernel/kthread.c:341) 


Finger prints:
__skb_checksum:__skb_checksum_complete:icmpv6_rcv:ip6_protocol_deliver_rcu