======================================
|
| [   40.685170][    C0] ------------[ cut here ]------------
| [   40.685554][    C0] kernel BUG at net/core/skbuff.c:3605!
| [   40.685881][    C0] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
[   40.686617][    C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 40.687208][ C0] RIP: 0010:skb_copy_and_csum_bits (net/core/skbuff.c:3605 (discriminator 1)) 
[ 40.687555][ C0] 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 d2 69 9b 89 44 24 40 48 89 74 24 38 e8 68 60 8d
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 d2 69 9b 	mov    $0xffffffff9b69d2c0,%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:	68                   	.byte 0x68
  3e:	60                   	(bad)
  3f:	8d                   	.byte 0x8d

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	48 c7 c7 c0 d2 69 9b 	mov    $0xffffffff9b69d2c0,%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:	68                   	.byte 0x68
  14:	60                   	(bad)
  15:	8d                   	.byte 0x8d
[   40.688486][    C0] RSP: 0018:ffffc900000073f0 EFLAGS: 00010202
[   40.688825][    C0] RAX: 0000000000000001 RBX: 0000000000000000 RCX: 1ffff11006081231
[   40.689219][    C0] RDX: dffffc0000000000 RSI: dffffc0000000000 RDI: ffff888030409188
[   40.689613][    C0] RBP: ffff88803040ae38 R08: 0000000000000030 R09: 000000000000fd00
[   40.690003][    C0] R10: 40110900da880a60 R11: 000000000000fd00 R12: 00000000000031bc
[   40.690399][    C0] R13: 0000000000000008 R14: 0000000000000030 R15: 0000000000000008
[   40.690787][    C0] FS:  00007f59bebe0740(0000) GS:ffff888036000000(0000) knlGS:0000000000000000
[   40.691253][    C0] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   40.691586][    C0] CR2: 00007ffda1e50000 CR3: 00000000081dc002 CR4: 0000000000770ef0
[   40.691977][    C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   40.692370][    C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   40.692772][    C0] PKRU: 55555554
[   40.692972][    C0] Call Trace:
[   40.693171][    C0]  <IRQ>
[ 40.693310][ C0] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) 
[ 40.693518][ C0] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) 
[ 40.693718][ C0] ? skb_copy_and_csum_bits (net/core/skbuff.c:3605 (discriminator 1)) 
[ 40.693983][ C0] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) 
[ 40.694244][ C0] ? skb_copy_and_csum_bits (net/core/skbuff.c:3605 (discriminator 1)) 
[ 40.694504][ C0] ? skb_copy_and_csum_bits (net/core/skbuff.c:3605 (discriminator 1)) 
[ 40.694770][ C0] ? handle_invalid_op (arch/x86/kernel/traps.c:213) 
[ 40.695032][ C0] ? skb_copy_and_csum_bits (net/core/skbuff.c:3605 (discriminator 1)) 
[ 40.695310][ C0] ? exc_invalid_op (arch/x86/kernel/traps.c:265) 
[ 40.695577][ C0] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 40.695846][ C0] ? skb_copy_and_csum_bits (net/core/skbuff.c:3605 (discriminator 1)) 
[ 40.696111][ C0] ? __pfx_sock_alloc_send_pskb (net/core/sock.c:2768) 
[ 40.696378][ C0] icmpv6_getfrag (net/ipv6/icmp.c:324) 
[ 40.696652][ C0] __ip6_append_data.isra.0 (net/ipv6/ip6_output.c:1683) 
[ 40.696920][ C0] ? __pfx_icmpv6_getfrag (net/ipv6/icmp.c:317) 
[ 40.697192][ C0] ? ip6_dst_mtu_maybe_forward.constprop.0 (./include/net/ip6_route.h:335) 
[ 40.697522][ C0] ? __pfx___ip6_append_data.isra.0 (net/ipv6/ip6_output.c:1403) 
[ 40.697851][ C0] ? ip6_dst_mtu_maybe_forward.constprop.0 (./include/net/ip6_route.h:335) 
[ 40.698176][ C0] ? 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) 
[ 40.698442][ C0] ? __pfx_icmpv6_getfrag (net/ipv6/icmp.c:317) 
[ 40.698700][ C0] ip6_append_data (net/ipv6/ip6_output.c:1838) 
[ 40.698975][ C0] icmp6_send (net/ipv6/icmp.c:616) 
[ 40.699246][ C0] ? __pfx_icmp6_send (net/ipv6/icmp.c:448) 
[ 40.699644][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 40.699888][ C0] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 40.700157][ C0] ? __udp6_lib_lookup (net/ipv6/udp.c:254) 
[ 40.700538][ C0] ? __udp6_lib_rcv (net/ipv6/udp.c:1028 (discriminator 118)) 
[ 40.700799][ C0] __udp6_lib_rcv (net/ipv6/udp.c:1028 (discriminator 118)) 
[ 40.701059][ C0] ? __pfx___udp6_lib_rcv (net/ipv6/udp.c:931) 
[ 40.701469][ C0] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 40.701705][ C0] ip6_protocol_deliver_rcu (net/ipv6/ip6_input.c:440 (discriminator 4)) 
[ 40.701979][ C0] ? ip6_route_input (./include/linux/skbuff.h:1168 net/ipv6/route.c:2594) 
[ 40.702362][ C0] ip6_input_finish (./include/linux/rcupdate.h:779 net/ipv6/ip6_input.c:484) 
[ 40.702630][ C0] ip6_input (./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv6/ip6_input.c:492) 
[ 40.702829][ C0] ? __pfx_ip6_input (net/ipv6/ip6_input.c:491) 
[ 40.703096][ C0] 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) 
[ 40.703313][ C0] ? __pfx_ipv6_rcv (net/ipv6/ip6_input.c:304) 
[ 40.703581][ C0] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 40.704009][ C0] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 40.704210][ C0] ? __pfx_ipv6_rcv (net/ipv6/ip6_input.c:304) 
[ 40.704468][ C0] __netif_receive_skb_one_core (net/core/dev.c:5603) 
[ 40.704800][ C0] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603) 
[ 40.705250][ C0] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 40.705516][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 40.705771][ C0] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 40.706035][ C0] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:6053) 
[ 40.706419][ C0] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 40.706669][ C0] __napi_poll.constprop.0 (net/core/dev.c:6703) 
[ 40.706932][ C0] net_rx_action (net/core/dev.c:6772 net/core/dev.c:6886) 
[ 40.707198][ C0] ? __pfx_net_rx_action (net/core/dev.c:6850) 
[ 40.707458][ C0] ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:94 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86) 
[ 40.707835][ C0] ? ktime_get (kernel/time/timekeeping.c:195 (discriminator 4) kernel/time/timekeeping.c:289 (discriminator 4) kernel/time/timekeeping.c:388 (discriminator 4) kernel/time/timekeeping.c:848 (discriminator 4)) 
[ 40.708038][ C0] ? hrtimer_interrupt (kernel/time/hrtimer.c:1828) 
[ 40.708299][ C0] ? hrtimer_interrupt (kernel/time/hrtimer.c:1828) 
[ 40.708561][ C0] __do_softirq (kernel/softirq.c:553) 
[ 40.708824][ C0] ? __neigh_event_send (./include/linux/bottom_half.h:33 net/core/neighbour.c:1245) 
[ 40.709085][ C0] do_softirq (kernel/softirq.c:454 kernel/softirq.c:441) 
[   40.709284][    C0]  </IRQ>
[   40.709416][    C0]  <TASK>
[ 40.709547][ C0] __local_bh_enable_ip (kernel/softirq.c:381) 
[ 40.709805][ C0] __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) 
[ 40.710064][ C0] ? do_raw_write_lock (kernel/locking/spinlock_debug.c:187 kernel/locking/spinlock_debug.c:210) 
[ 40.710326][ C0] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) 
[ 40.710591][ C0] neigh_resolve_output (net/core/neighbour.c:1547) 
[ 40.710854][ C0] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 kernel/softirq.c:386) 
[ 40.711250][ C0] ? ___neigh_create (net/core/neighbour.c:722 (discriminator 9)) 
[ 40.711485][ C0] ip6_finish_output2 (./include/net/neighbour.h:542 net/ipv6/ip6_output.c:137) 
[ 40.711747][ C0] ip6_finish_output (net/ipv6/ip6_output.c:211 net/ipv6/ip6_output.c:222) 
[ 40.712010][ C0] ip6_output (./include/linux/netfilter.h:303 net/ipv6/ip6_output.c:243) 
[ 40.712208][ C0] ? __pfx_ip6_output (net/ipv6/ip6_output.c:230) 
[ 40.712470][ C0] ? __pfx_ip_generic_getfrag (net/ipv4/ip_output.c:935) 
[ 40.712733][ C0] ? ip6_local_out (net/ipv6/output_core.c:154) 
[ 40.713125][ C0] ip6_send_skb (net/ipv6/ip6_output.c:1959) 
[ 40.713390][ C0] udp_v6_send_skb (net/ipv6/udp.c:1285) 
[ 40.713842][ C0] udpv6_sendmsg (net/ipv6/udp.c:1580) 
[ 40.714104][ 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) 
[ 40.714366][ C0] ? __pfx_ip_generic_getfrag (net/ipv4/ip_output.c:935) 
[ 40.714627][ C0] ? __pfx_udpv6_sendmsg (net/ipv6/udp.c:1321) 
[ 40.715027][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 40.715260][ C0] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073) 
[ 40.715529][ C0] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073) 
[ 40.715900][ C0] ? __pfx_inet6_sendmsg (net/ipv6/af_inet6.c:651) 
[ 40.716310][ C0] ? ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2584) 
[ 40.716524][ C0] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2584) 
[ 40.716792][ C0] ? __pfx_____sys_sendmsg (net/socket.c:2530) 
[ 40.717054][ C0] ? __pfx_copy_msghdr_from_user (net/socket.c:2510) 
[ 40.717502][ C0] ? lookup_memtype (arch/x86/mm/pat/memtype.c:680) 
[ 40.717955][ C0] ___sys_sendmsg (net/socket.c:2640) 
[ 40.718217][ C0] ? __pte_offset_map (./include/linux/rcupdate.h:751 mm/pgtable-generic.c:285) 
[ 40.718482][ C0] ? __pfx____sys_sendmsg (net/socket.c:2627) 
[ 40.718932][ C0] ? vvar_fault (arch/x86/entry/vdso/vma.c:186) 
[ 40.719136][ C0] ? __do_fault (mm/memory.c:4396) 
[ 40.719390][ C0] ? do_pte_missing (mm/memory.c:4758 mm/memory.c:4888 mm/memory.c:3745) 
[ 40.719654][ C0] ? __pfx___handle_mm_fault (mm/memory.c:5216) 
[ 40.719917][ C0] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 40.720186][ C0] __sys_sendmsg (./include/linux/file.h:32 net/socket.c:2669) 
[ 40.720444][ C0] ? __pfx___sys_sendmsg (net/socket.c:2655) 
[ 40.720701][ 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) 
[ 40.720960][ C0] ? __pfx_find_vma (mm/mmap.c:1883) 
[ 40.721341][ C0] ? do_user_addr_fault (arch/x86/mm/fault.c:1436) 
[ 40.721603][ C0] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 40.721862][ C0] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   40.722186][    C0] RIP: 0033:0x7f59bed327b7
[ 40.722696][ C0] Code: 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
All code
========
   0:	0a 00                	or     (%rax),%al
   2:	f7 d8                	neg    %eax
   4:	64 89 02             	mov    %eax,%fs:(%rdx)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b9                	jmp    0xffffffffffffffc9
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 2e 00 00 00       	mov    $0x2e,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 51                	ja     0x83
  32:	c3                   	ret
  33:	48 83 ec 28          	sub    $0x28,%rsp
  37:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  3b:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 51                	ja     0x59
   8:	c3                   	ret
   9:	48 83 ec 28          	sub    $0x28,%rsp
   d:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  11:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)
[   40.723584][    C0] RSP: 002b:00007ffda1e3b528 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   40.724094][    C0] RAX: ffffffffffffffda RBX: 0000003d00000001 RCX: 00007f59bed327b7
[   40.724482][    C0] RDX: 0000000000000000 RSI: 00007ffda1e3b5e0 RDI: 0000000000000005
[   40.724872][    C0] RBP: 0000000000000005 R08: 000000000001320a R09: 00007ffda1e4f080
[   40.725266][    C0] R10: 00007f59bebeb708 R11: 0000000000000246 R12: 00007ffda1e3b560


Finger prints:
skb_copy_and_csum_bits:icmpv6_getfrag:ip6_append_data:icmp6_send