======================================
| [   33.685174][  T321] ip_gre: GRE over IPv4 tunneling driver
| [   44.411146][    C0] ------------[ cut here ]------------
| [   44.411508][    C0] kernel BUG at net/core/skbuff.c:3505!
| [   44.411707][    C0] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
[   44.412150][    C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 44.412503][ C0] RIP: 0010:__skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 44.412677][ C0] 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
[   44.413215][    C0] RSP: 0018:ffffc90000007920 EFLAGS: 00010202
[   44.413411][    C0] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffff11000c41cd9
[   44.413645][    C0] RDX: 0000000000000040 RSI: 0000000000000000 RDI: ffff88800620e6c8
[   44.413871][    C0] RBP: 0000000000000000 R08: ffffc900000079e0 R09: fffffbfff55dc5ea
[   44.414099][    C0] R10: ffffffffaaee2f57 R11: dffffc0000000000 R12: 0000000000000000
[   44.414332][    C0] R13: 0000000000000000 R14: ffffc900000079e0 R15: ffff888003818608
[   44.414558][    C0] FS:  00007fd2e04b9300(0000) GS:ffff888036000000(0000) knlGS:0000000000000000
[   44.414823][    C0] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   44.415015][    C0] CR2: 00007fff03de1ff8 CR3: 0000000007a08006 CR4: 0000000000770ef0
[   44.415244][    C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   44.415474][    C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   44.415700][    C0] PKRU: 55555554
[   44.415814][    C0] Call Trace:
[   44.415933][    C0]  <IRQ>
[ 44.416011][ C0] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) 
[ 44.416130][ C0] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) 
[ 44.416247][ C0] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 44.416401][ C0] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) 
[ 44.416551][ C0] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 44.416706][ C0] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 44.416857][ C0] ? handle_invalid_op (arch/x86/kernel/traps.c:213) 
[ 44.417006][ C0] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 44.417156][ C0] ? exc_invalid_op (arch/x86/kernel/traps.c:265) 
[ 44.417310][ C0] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 44.417467][ C0] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 44.417622][ C0] __skb_checksum_complete (net/core/skbuff.c:3643) 
[ 44.417776][ C0] ? __pfx___skb_checksum_complete (net/core/skbuff.c:3637) 
[ 44.417966][ C0] ? __pfx_csum_partial_ext (./include/net/checksum.h:120) 
[ 44.418117][ C0] ? __pfx_csum_block_add_ext (./include/net/checksum.h:103) 
[ 44.418267][ C0] icmp_rcv (./include/linux/skbuff.h:4567 net/ipv4/icmp.c:1213) 
[ 44.418387][ C0] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 5)) 
[ 44.418548][ C0] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234) 
[ 44.418701][ C0] ip_local_deliver (./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:254) 
[ 44.418852][ C0] ? __pfx_ip_local_deliver (net/ipv4/ip_input.c:243) 
[ 44.419004][ C0] ? ip_rcv_finish_core.constprop.0 (./include/linux/skbuff.h:1136 ./include/linux/skbuff.h:1188 net/ipv4/ip_input.c:390) 
[ 44.419195][ C0] 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) 
[ 44.419311][ C0] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) 
[ 44.419471][ C0] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 44.419628][ C0] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 44.419784][ C0] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) 
[ 44.419936][ C0] __netif_receive_skb_one_core (net/core/dev.c:5610 (discriminator 4)) 
[ 44.420124][ C0] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603) 
[ 44.420311][ C0] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 44.420465][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 44.420615][ C0] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 44.420766][ C0] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:6053) 
[ 44.420919][ C0] __napi_poll.constprop.0 (net/core/dev.c:6703) 
[ 44.421072][ C0] net_rx_action (net/core/dev.c:6772 net/core/dev.c:6886) 
[ 44.421225][ C0] ? __pfx_net_rx_action (net/core/dev.c:6850) 
[ 44.421374][ C0] ? try_to_wake_up (kernel/sched/core.c:4373) 
[ 44.421526][ C0] ? hlock_class (kernel/locking/lockdep.c:223) 
[ 44.421680][ C0] ? __pfx_try_to_wake_up (kernel/sched/core.c:4223) 
[ 44.421835][ C0] __do_softirq (kernel/softirq.c:553) 
[ 44.421989][ C0] ? raw_sendmsg (net/ipv4/raw.c:651) 
[ 44.422142][ C0] do_softirq (kernel/softirq.c:454 kernel/softirq.c:441) 
[   44.422263][    C0]  </IRQ>
[   44.422340][    C0]  <TASK>
[ 44.422418][ C0] __local_bh_enable_ip (kernel/softirq.c:381) 
[ 44.422572][ C0] raw_sendmsg (net/ipv4/raw.c:651) 
[ 44.422723][ C0] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) 
[ 44.422875][ C0] ? __pfx_raw_sendmsg (net/ipv4/raw.c:476) 
[ 44.423024][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 44.423180][ C0] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 44.423332][ C0] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 44.423485][ C0] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073) 
[ 44.423641][ C0] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 44.423795][ C0] ? 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) 
[ 44.423947][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 44.424098][ C0] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073) 
[ 44.424249][ C0] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073) 
[ 44.424407][ C0] ? __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191) 
[ 44.424561][ C0] __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191) 
[ 44.424715][ C0] ? __pfx___sys_sendto (net/socket.c:2161) 
[ 44.424869][ C0] ? do_user_addr_fault (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 ./include/linux/mm.h:686 arch/x86/mm/fault.c:1357) 
[ 44.425024][ C0] ? reacquire_held_locks (kernel/locking/lockdep.c:5279) 
[ 44.425264][ C0] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 44.425416][ C0] ? do_user_addr_fault (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 ./include/linux/mm.h:688 arch/x86/mm/fault.c:1357) 
[ 44.425566][ C0] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 44.425716][ C0] ? __up_read (./arch/x86/include/asm/atomic64_64.h:79 ./include/linux/atomic/atomic-arch-fallback.h:2735 ./include/linux/atomic/atomic-long.h:184 ./include/linux/atomic/atomic-instrumented.h:3289 kernel/locking/rwsem.c:1347) 
[ 44.425948][ C0] ? __pfx___up_read (kernel/locking/rwsem.c:1339) 
[ 44.426101][ C0] ? do_user_addr_fault (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 ./include/linux/mm.h:688 arch/x86/mm/fault.c:1357) 
[ 44.426256][ C0] __x64_sys_sendto (net/socket.c:2199) 
[ 44.426408][ C0] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 44.426674][ C0] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 44.426826][ C0] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   44.427013][    C0] RIP: 0033:0x7fd2e078f85a
[ 44.427168][ C0] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 f3 0f 1e fa 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 15 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 7e c3 0f 1f 44 00 00 41 54 48 83 ec 30 44 89
All code
========
   0:	d8 64 89 02          	fsubs  0x2(%rcx,%rcx,4)
   4:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   b:	eb b8                	jmp    0xffffffffffffffc5
   d:	0f 1f 00             	nopl   (%rax)
  10:	f3 0f 1e fa          	endbr64
  14:	41 89 ca             	mov    %ecx,%r10d
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 15                	jne    0x38
  23:	b8 2c 00 00 00       	mov    $0x2c,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 7e                	ja     0xb0
  32:	c3                   	ret
  33:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  38:	41 54                	push   %r12
  3a:	48 83 ec 30          	sub    $0x30,%rsp
  3e:	44                   	rex.R
  3f:	89                   	.byte 0x89

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 7e                	ja     0x86
   8:	c3                   	ret
   9:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   e:	41 54                	push   %r12
  10:	48 83 ec 30          	sub    $0x30,%rsp
  14:	44                   	rex.R
  15:	89                   	.byte 0x89
[   44.427883][    C0] RSP: 002b:00007fff03de2c38 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[   44.428196][    C0] RAX: ffffffffffffffda RBX: 0000000000000038 RCX: 00007fd2e078f85a
[   44.428423][    C0] RDX: 0000000000000040 RSI: 0000000000ddc340 RDI: 0000000000000005
[   44.428657][    C0] RBP: 00007fff03de2c90 R08: 00000000004185e0 R09: 0000000000000010
[   44.428969][    C0] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000054


Finger prints:
__skb_checksum:__skb_checksum_complete:icmp_rcv:ip_protocol_deliver_rcu