======================================
| [   72.668741][  T434] Mirror/redirect action on
| [   81.640261][    C2] ------------[ cut here ]------------
| [   81.640603][    C2] kernel BUG at net/core/skbuff.c:2813!
| [   81.640773][    C2] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
[   81.641191][    C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 81.641500][ C2] RIP: 0010:__pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 81.641687][ C2] Code: e9 52 f7 ff ff 48 8b 7c 24 38 be 02 00 00 00 e8 8e 9c ff ff 48 83 c4 58 31 c0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc 90 <0f> 0b 48 c7 44 24 38 00 00 00 00 e9 dc fa ff ff 84 c9 0f 84 4b f9
All code
========
   0:	e9 52 f7 ff ff       	jmp    0xfffffffffffff757
   5:	48 8b 7c 24 38       	mov    0x38(%rsp),%rdi
   a:	be 02 00 00 00       	mov    $0x2,%esi
   f:	e8 8e 9c ff ff       	call   0xffffffffffff9ca2
  14:	48 83 c4 58          	add    $0x58,%rsp
  18:	31 c0                	xor    %eax,%eax
  1a:	5b                   	pop    %rbx
  1b:	41 5c                	pop    %r12
  1d:	41 5d                	pop    %r13
  1f:	41 5e                	pop    %r14
  21:	41 5f                	pop    %r15
  23:	5d                   	pop    %rbp
  24:	c3                   	ret
  25:	cc                   	int3
  26:	cc                   	int3
  27:	cc                   	int3
  28:	cc                   	int3
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	48 c7 44 24 38 00 00 	movq   $0x0,0x38(%rsp)
  33:	00 00 
  35:	e9 dc fa ff ff       	jmp    0xfffffffffffffb16
  3a:	84 c9                	test   %cl,%cl
  3c:	0f                   	.byte 0xf
  3d:	84 4b f9             	test   %cl,-0x7(%rbx)

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	48 c7 44 24 38 00 00 	movq   $0x0,0x38(%rsp)
   9:	00 00 
   b:	e9 dc fa ff ff       	jmp    0xfffffffffffffaec
  10:	84 c9                	test   %cl,%cl
  12:	0f                   	.byte 0xf
  13:	84 4b f9             	test   %cl,-0x7(%rbx)
[   81.642174][    C2] RSP: 0018:ffffc90000220960 EFLAGS: 00010282
[   81.642349][    C2] RAX: 00000000fffffff2 RBX: ffff888005c9d774 RCX: 0000000000000004
[   81.642557][    C2] RDX: dffffc0000000000 RSI: 1ffff11000cd8e41 RDI: ffff8880066c7208
[   81.642763][    C2] RBP: ffffc900002209e0 R08: 0000000000000008 R09: ffff888005c9d7bc
[   81.642971][    C2] R10: ffff888005c9d7c0 R11: 0000000000000000 R12: ffff888005c9d700
[   81.643182][    C2] R13: ffff8880066c6ee0 R14: 0000000000000001 R15: 0000000000000011
[   81.643388][    C2] FS:  0000000000000000(0000) GS:ffff888036100000(0000) knlGS:0000000000000000
[   81.643628][    C2] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   81.643802][    C2] CR2: 00007ffd247ee000 CR3: 0000000004520006 CR4: 0000000000770ef0
[   81.644011][    C2] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   81.644218][    C2] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   81.644427][    C2] PKRU: 55555554
[   81.644534][    C2] Call Trace:
[   81.644637][    C2]  <IRQ>
[ 81.644709][ C2] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) 
[ 81.644820][ C2] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) 
[ 81.644925][ C2] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 81.645062][ C2] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) 
[ 81.645198][ C2] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 81.645338][ C2] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 81.645475][ C2] ? handle_invalid_op (arch/x86/kernel/traps.c:213) 
[ 81.645612][ C2] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 81.645748][ C2] ? exc_invalid_op (arch/x86/kernel/traps.c:265) 
[ 81.645889][ C2] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 81.646031][ C2] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 81.646169][ C2] ? raw_rcv (net/ipv4/raw.c:296 net/ipv4/raw.c:315) 
[ 81.646276][ C2] __udp4_lib_rcv (./include/linux/skbuff.h:2731 ./include/linux/skbuff.h:2739 net/ipv4/udp.c:2378) 
[ 81.646419][ C2] ? raw_v4_input (net/ipv4/raw.c:165) 
[ 81.646557][ C2] ? __pfx___udp4_lib_rcv (net/ipv4/udp.c:2363) 
[ 81.646695][ C2] ? __pfx_raw_v4_input (net/ipv4/raw.c:165) 
[ 81.646833][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 81.646995][ C2] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) 
[ 81.647140][ C2] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:207 (discriminator 4)) 
[ 81.647285][ C2] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234) 
[ 81.647429][ C2] ip_local_deliver (./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:254) 
[ 81.647575][ C2] ? __pfx_ip_local_deliver (net/ipv4/ip_input.c:243) 
[ 81.647718][ C2] ? ip_rcv_finish_core.constprop.0 (./include/net/net_namespace.h:383 ./include/linux/netdevice.h:2654 net/ipv4/ip_input.c:372) 
[ 81.647896][ C2] ip_rcv (./include/net/dst.h:460 net/ipv4/ip_input.c:449 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:569) 
[ 81.648002][ C2] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) 
[ 81.648160][ C2] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 81.648297][ C2] ? netif_receive_skb_internal (./include/linux/rcupdate.h:298 (discriminator 16) ./include/linux/rcupdate.h:750 (discriminator 16) net/core/dev.c:5797 (discriminator 16)) 
[ 81.648470][ C2] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) 
[ 81.648607][ C2] __netif_receive_skb_one_core (net/core/dev.c:5610 (discriminator 4)) 
[ 81.648782][ C2] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603) 
[ 81.648955][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 81.649092][ C2] ? netif_receive_skb_internal (./include/linux/rcupdate.h:298 (discriminator 16) ./include/linux/rcupdate.h:750 (discriminator 16) net/core/dev.c:5797 (discriminator 16)) 
[ 81.649264][ C2] netif_receive_skb_internal (net/core/dev.c:5810) 
[ 81.649400][ C2] ? __pfx_netif_receive_skb_internal (net/core/dev.c:5789) 
[ 81.649571][ C2] ? ifb_ri_tasklet (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 drivers/net/ifb.c:124) ifb
[ 81.649715][ C2] netif_receive_skb (net/core/dev.c:5869) 
[ 81.649854][ C2] ifb_ri_tasklet (drivers/net/ifb.c:131) ifb
[ 81.649996][ C2] tasklet_action_common.constprop.0 (kernel/softirq.c:780) 
[ 81.650170][ C2] __do_softirq (kernel/softirq.c:553) 
[ 81.650309][ C2] irq_exit_rcu (kernel/softirq.c:427 kernel/softirq.c:632 kernel/softirq.c:644) 
[ 81.650411][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1076 (discriminator 14)) 
[   81.650548][    C2]  </IRQ>
[   81.650618][    C2]  <TASK>
[ 81.650687][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:649) 
[ 81.650858][ C2] RIP: 0010:default_idle (./arch/x86/include/asm/irqflags.h:37 ./arch/x86/include/asm/irqflags.h:72 arch/x86/kernel/process.c:743) 
[ 81.651003][ C2] Code: 4c 01 c7 4c 29 c2 e9 72 ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 03 b1 3c 00 fb f4 <fa> c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
All code
========
   0:	4c 01 c7             	add    %r8,%rdi
   3:	4c 29 c2             	sub    %r8,%rdx
   6:	e9 72 ff ff ff       	jmp    0xffffffffffffff7d
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	f3 0f 1e fa          	endbr64
  1f:	66 90                	xchg   %ax,%ax
  21:	0f 00 2d 03 b1 3c 00 	verw   0x3cb103(%rip)        # 0x3cb12b
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	fa                   	cli		<-- trapping instruction
  2b:	c3                   	ret
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	cc                   	int3
  2f:	cc                   	int3
  30:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
  37:	00 00 00 00 
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	fa                   	cli
   1:	c3                   	ret
   2:	cc                   	int3
   3:	cc                   	int3
   4:	cc                   	int3
   5:	cc                   	int3
   6:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
   d:	00 00 00 00 
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[   81.651487][    C2] RSP: 0018:ffffc9000014fdf8 EFLAGS: 00000242
[   81.651661][    C2] RAX: 000000000019ebe3 RBX: 1ffff92000029fc1 RCX: ffffffffa8295b72
[   81.651868][    C2] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffa5a99876
[   81.652078][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c26e64
[   81.652283][    C2] R10: ffff888036137323 R11: ffff88803613c080 R12: 0000000000000000
[   81.652492][    C2] R13: ffff888001b722c0 R14: dffffc0000000000 R15: 0000000000000000
[ 81.652700][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:147) 
[ 81.652838][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:171) 
[ 81.652980][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:98) 
[ 81.653117][ C2] cpuidle_idle_call (kernel/sched/idle.c:171) 
[ 81.653256][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:147) 
[ 81.653392][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 81.653530][ C2] do_idle (kernel/sched/idle.c:312) 
[ 81.653633][ C2] cpu_startup_entry (kernel/sched/idle.c:409 (discriminator 1)) 
[ 81.653769][ C2] start_secondary (arch/x86/kernel/smpboot.c:224 arch/x86/kernel/smpboot.c:304) 
[ 81.653905][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:254) 


Finger prints:
__pskb_pull_tail:__udp4_lib_rcv:ip_protocol_deliver_rcu:ip_local_deliver_finish