======================================
|
| [   94.098513][    C1] ------------[ cut here ]------------
| [   94.098831][    C1] kernel BUG at net/core/skbuff.c:3605!
| [   94.099021][    C1] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
[   94.099453][    C1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 94.099797][ C1] RIP: 0010:skb_copy_and_csum_bits (net/core/skbuff.c:3605 (discriminator 1)) 
[ 94.100001][ C1] Code: 89 c4 0f 84 70 fe ff ff 45 01 f7 48 01 dd 44 89 7c 24 0c e9 92 fa ff ff 90 0f 0b 90 e9 e2 fe ff ff 41 89 c4 e9 4f fe ff ff 90 <0f> 0b 48 c7 c7 c0 32 c3 b8 89 44 24 40 48 89 74 24 38 e8 98 b2 91
All code
========
   0:	89 c4                	mov    %eax,%esp
   2:	0f 84 70 fe ff ff    	je     0xfffffffffffffe78
   8:	45 01 f7             	add    %r14d,%r15d
   b:	48 01 dd             	add    %rbx,%rbp
   e:	44 89 7c 24 0c       	mov    %r15d,0xc(%rsp)
  13:	e9 92 fa ff ff       	jmp    0xfffffffffffffaaa
  18:	90                   	nop
  19:	0f 0b                	ud2
  1b:	90                   	nop
  1c:	e9 e2 fe ff ff       	jmp    0xffffffffffffff03
  21:	41 89 c4             	mov    %eax,%r12d
  24:	e9 4f fe ff ff       	jmp    0xfffffffffffffe78
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	48 c7 c7 c0 32 c3 b8 	mov    $0xffffffffb8c332c0,%rdi
  33:	89 44 24 40          	mov    %eax,0x40(%rsp)
  37:	48 89 74 24 38       	mov    %rsi,0x38(%rsp)
  3c:	e8                   	.byte 0xe8
  3d:	98                   	cwtl
  3e:	b2 91                	mov    $0x91,%dl

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	48 c7 c7 c0 32 c3 b8 	mov    $0xffffffffb8c332c0,%rdi
   9:	89 44 24 40          	mov    %eax,0x40(%rsp)
   d:	48 89 74 24 38       	mov    %rsi,0x38(%rsp)
  12:	e8                   	.byte 0xe8
  13:	98                   	cwtl
  14:	b2 91                	mov    $0x91,%dl
[   94.100559][    C1] RSP: 0018:ffffc900001c84e0 EFLAGS: 00010202
[   94.100755][    C1] RAX: 0000000000000020 RBX: 0000000000000000 RCX: 1ffff11000482029
[   94.100988][    C1] RDX: dffffc0000000000 RSI: dffffc0000000000 RDI: ffff888002410148
[   94.101219][    C1] RBP: ffff888002411ab8 R08: 0000000000000030 R09: 444028009a82a0dc
[   94.101448][    C1] R10: 0200000000000000 R11: 444028009a82a0dc R12: 0000000000004dc7
[   94.101677][    C1] R13: 0000000000000030 R14: 0000000000000030 R15: 0000000000000030
[   94.101906][    C1] FS:  00007f3a19b57740(0000) GS:ffff888036080000(0000) knlGS:0000000000000000
[   94.102173][    C1] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   94.102371][    C1] CR2: 0000561550087c80 CR3: 00000000036be003 CR4: 0000000000770ef0
[   94.102600][    C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   94.102830][    C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   94.103060][    C1] PKRU: 55555554
[   94.103177][    C1] Call Trace:
[   94.103292][    C1]  <IRQ>
[ 94.103370][ C1] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) 
[ 94.103495][ C1] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) 
[ 94.103614][ C1] ? skb_copy_and_csum_bits (net/core/skbuff.c:3605 (discriminator 1)) 
[ 94.103768][ C1] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) 
[ 94.103922][ C1] ? skb_copy_and_csum_bits (net/core/skbuff.c:3605 (discriminator 1)) 
[ 94.104075][ C1] ? skb_copy_and_csum_bits (net/core/skbuff.c:3605 (discriminator 1)) 
[ 94.104229][ C1] ? handle_invalid_op (arch/x86/kernel/traps.c:213) 
[ 94.104383][ C1] ? skb_copy_and_csum_bits (net/core/skbuff.c:3605 (discriminator 1)) 
[ 94.104536][ C1] ? exc_invalid_op (arch/x86/kernel/traps.c:265) 
[ 94.104693][ C1] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 94.104849][ C1] ? skb_copy_and_csum_bits (net/core/skbuff.c:3605 (discriminator 1)) 
[ 94.105004][ C1] ? __pfx_sock_alloc_send_pskb (net/core/sock.c:2768) 
[ 94.105161][ C1] icmpv6_getfrag (net/ipv6/icmp.c:324) 
[ 94.105321][ C1] __ip6_append_data.isra.0 (net/ipv6/ip6_output.c:1683) 
[ 94.105478][ C1] ? __pfx_icmpv6_getfrag (net/ipv6/icmp.c:317) 
[ 94.105636][ C1] ? ip6_mtu (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 ./include/net/ip6_route.h:336 net/ipv6/route.c:3217) 
[ 94.105755][ C1] ? __pfx___ip6_append_data.isra.0 (net/ipv6/ip6_output.c:1403) 
[ 94.105948][ C1] ? ip6_mtu (net/ipv6/route.c:3218) 
[ 94.106065][ C1] ? ip6_setup_cork (./arch/x86/include/asm/bitops.h:206 ./arch/x86/include/asm/bitops.h:238 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 ./include/net/sock.h:977 ./include/net/sock.h:2767 ./include/net/sock.h:2774 net/ipv6/ip6_output.c:1395) 
[ 94.106219][ C1] ? __pfx_icmpv6_getfrag (net/ipv6/icmp.c:317) 
[ 94.106372][ C1] ip6_append_data (net/ipv6/ip6_output.c:1838) 
[ 94.106528][ C1] icmp6_send (net/ipv6/icmp.c:616) 
[ 94.106683][ C1] ? __pfx_icmp6_send (net/ipv6/icmp.c:448) 
[ 94.106835][ C1] ? __pfx_fib_rules_lookup (net/core/fib_rules.c:293) 
[ 94.106990][ C1] ? l3mdev_update_flow (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/l3mdev/l3mdev.c:275) 
[ 94.107148][ C1] ? fib6_rule_lookup (net/ipv6/fib6_rules.c:111) 
[ 94.107303][ C1] ? __pfx_fib6_rule_lookup (net/ipv6/fib6_rules.c:95) 
[ 94.107467][ C1] ? __pfx_ip6_pol_route_input (net/ipv6/route.c:2285) 
[ 94.107623][ C1] ? ip6_forward (net/ipv6/ip6_output.c:548) 
[ 94.107775][ C1] ip6_forward (net/ipv6/ip6_output.c:548) 
[ 94.107930][ C1] ? ip6_route_input (./include/linux/skbuff.h:1168 net/ipv6/route.c:2594) 
[ 94.108087][ C1] ? __pfx_ip6_forward (net/ipv6/ip6_output.c:494) 
[ 94.108242][ C1] ? udp_v6_early_demux (net/ipv6/udp.c:1067 net/ipv6/udp.c:1097) 
[ 94.108402][ C1] ? ipv6_rcv (./include/net/dst.h:460 ./include/net/dst.h:458 net/ipv6/ip6_input.c:79 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv6/ip6_input.c:310) 
[ 94.108516][ C1] ipv6_rcv (./include/net/dst.h:460 ./include/net/dst.h:458 net/ipv6/ip6_input.c:79 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv6/ip6_input.c:310) 
[ 94.108632][ C1] ? __pfx_ipv6_rcv (net/ipv6/ip6_input.c:304) 
[ 94.108788][ C1] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 94.108943][ C1] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 94.109099][ C1] ? __pfx_ipv6_rcv (net/ipv6/ip6_input.c:304) 
[ 94.109252][ C1] __netif_receive_skb_one_core (net/core/dev.c:5603) 
[ 94.109441][ C1] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603) 
[ 94.109633][ C1] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 94.109793][ C1] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 94.109945][ C1] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 94.110098][ C1] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:6053) 
[ 94.110252][ C1] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 94.110407][ C1] __napi_poll.constprop.0 (net/core/dev.c:6703) 
[ 94.110559][ C1] net_rx_action (net/core/dev.c:6772 net/core/dev.c:6886) 
[ 94.110714][ C1] ? __pfx_net_rx_action (net/core/dev.c:6850) 
[ 94.110867][ C1] ? 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) 
[ 94.111026][ C1] __do_softirq (kernel/softirq.c:553) 
[ 94.111182][ C1] ? __neigh_event_send (./include/linux/bottom_half.h:33 net/core/neighbour.c:1245) 
[ 94.111335][ C1] do_softirq (kernel/softirq.c:454 kernel/softirq.c:441) 
[   94.111452][    C1]  </IRQ>
[   94.111533][    C1]  <TASK>
[ 94.111611][ C1] __local_bh_enable_ip (kernel/softirq.c:381) 
[ 94.111763][ C1] __neigh_event_send (./arch/x86/include/asm/jump_label.h:27 ./include/linux/jump_label.h:207 ./include/trace/events/neigh.h:237 net/core/neighbour.c:1246) 
[ 94.111914][ C1] ? do_raw_write_lock (kernel/locking/spinlock_debug.c:186 kernel/locking/spinlock_debug.c:210) 
[ 94.112071][ C1] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) 
[ 94.112230][ C1] neigh_resolve_output (net/core/neighbour.c:1547) 
[ 94.112382][ C1] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 kernel/softirq.c:386) 
[ 94.112536][ C1] ? ___neigh_create (net/core/neighbour.c:722 (discriminator 9)) 
[ 94.112691][ C1] ip6_finish_output2 (./include/net/neighbour.h:542 net/ipv6/ip6_output.c:137) 
[ 94.112848][ C1] ip6_finish_output (net/ipv6/ip6_output.c:211 net/ipv6/ip6_output.c:222) 
[ 94.113003][ C1] ip6_output (./include/linux/netfilter.h:303 net/ipv6/ip6_output.c:243) 
[ 94.113119][ C1] ? __pfx_ip6_output (net/ipv6/ip6_output.c:230) 
[ 94.113274][ C1] ? vrf_l3_out (drivers/net/vrf.c:1035) vrf
[ 94.113482][ C1] ? ip6_local_out (net/ipv6/output_core.c:154) 
[ 94.113654][ C1] ip6_send_skb (net/ipv6/ip6_output.c:1959) 
[ 94.113808][ C1] udp_v6_send_skb (net/ipv6/udp.c:1285) 
[ 94.113964][ C1] udpv6_sendmsg (net/ipv6/udp.c:1580) 
[ 94.114116][ C1] ? do_ipv6_setsockopt (./arch/x86/include/asm/bitops.h:55 ./include/asm-generic/bitops/instrumented-atomic.h:29 ./include/linux/bitops.h:279 net/ipv6/ipv6_sockglue.c:487) 
[ 94.114270][ C1] ? __pfx_ip_generic_getfrag (net/ipv4/ip_output.c:935) 
[ 94.114424][ C1] ? __pfx_udpv6_sendmsg (net/ipv6/udp.c:1321) 
[ 94.114577][ C1] ? 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) 
[ 94.114739][ C1] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) 
[ 94.114893][ C1] ? 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) 
[ 94.115047][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 94.115205][ C1] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 94.115361][ C1] ? __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191) 
[ 94.115518][ C1] __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191) 
[ 94.115676][ C1] ? __pfx___sys_sendto (net/socket.c:2161) 
[ 94.115832][ C1] ? __pfx_do_sock_setsockopt (net/socket.c:2280) 
[ 94.115984][ C1] ? ip6_dst_check.part.0 (net/ipv6/route.c:2770) 
[ 94.116142][ C1] ? ip6_datagram_connect (net/ipv6/datagram.c:282) 
[ 94.116298][ C1] ? __sys_setsockopt (./include/linux/file.h:32 net/socket.c:2336) 
[ 94.116453][ C1] ? __pfx___sys_setsockopt (net/socket.c:2324) 
[ 94.116603][ C1] ? __pfx___up_read (kernel/locking/rwsem.c:1339) 
[ 94.116759][ C1] __x64_sys_sendto (net/socket.c:2199) 
[ 94.116913][ C1] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 94.117102][ C1] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 94.117256][ C1] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   94.117460][    C1] RIP: 0033:0x7f3a19ca9700
[ 94.117622][ C1] Code: ff ff 64 89 02 eb bd 0f 1f 00 f3 0f 1e fa 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 1d 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 68 c3 0f 1f 80 00 00 00 00 41 54 48 83 ec 20
All code
========
   0:	ff                   	(bad)
   1:	ff 64 89 02          	jmp    *0x2(%rcx,%rcx,4)
   5:	eb bd                	jmp    0xffffffffffffffc4
   7:	0f 1f 00             	nopl   (%rax)
   a:	f3 0f 1e fa          	endbr64
   e:	41 89 ca             	mov    %ecx,%r10d
  11:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  18:	00 
  19:	85 c0                	test   %eax,%eax
  1b:	75 1d                	jne    0x3a
  1d:	45 31 c9             	xor    %r9d,%r9d
  20:	45 31 c0             	xor    %r8d,%r8d
  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 68                	ja     0x9a
  32:	c3                   	ret
  33:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  3a:	41 54                	push   %r12
  3c:	48 83 ec 20          	sub    $0x20,%rsp

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 68                	ja     0x70
   8:	c3                   	ret
   9:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  10:	41 54                	push   %r12
  12:	48 83 ec 20          	sub    $0x20,%rsp
[   94.118165][    C1] RSP: 002b:00007ffd6f02f548 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[   94.118398][    C1] RAX: ffffffffffffffda RBX: 0000561551f693e0 RCX: 00007f3a19ca9700
[   94.118629][    C1] RDX: 0000000000000020 RSI: 0000561551f6b5b0 RDI: 0000000000000005
[   94.118860][    C1] RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000000
[   94.119086][    C1] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001


Finger prints:
skb_copy_and_csum_bits:icmpv6_getfrag:ip6_append_data:icmp6_send