------------[ cut here ]------------
kernel BUG at net/ipv4/ip_output.c:776!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 6092 Comm: syz-executor463 Not tainted 4.19.0-rc4-next-20180920+ #76
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:ip_do_fragment+0x2454/0x2ad0 net/ipv4/ip_output.c:776
Code: 8b 8d 70 fe ff ff e9 69 e8 ff ff 4c 89 ef e8 b3 5e 3b fb e9 4b e9 ff ff 4c 89 f7 e8 a6 5e 3b fb e9 c3 e5 ff ff e8 1c e3 f7 fa <0f> 0b 4c 89 e7 e8 92 5e 3b fb e9 87 e8 ff ff 4c 89 f7 89 8d 70 fe
RSP: 0018:ffff8801d48ae7d0 EFLAGS: 00010293
RAX: ffff8801d33fe100 RBX: ffff8801bd38c140 RCX: ffffffff86855654
RDX: 0000000000000000 RSI: ffffffff86856cd4 RDI: 0000000000000005
RBP: ffff8801d48ae9a8 R08: ffff8801d33fe100 R09: ffffed003a492e48
R10: ffffed003a492e4a R11: ffff8801d2497253 R12: ffff8801bd38c204
R13: 00000000fffffff2 R14: ffff8801bd38c210 R15: dffffc0000000000
FS:  00000000026c6880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000006cc090 CR3: 00000001cd28b000 CR4: 00000000001406f0
Call Trace:
 ip_fragment.constprop.50+0x179/0x240 net/ipv4/ip_output.c:549
 ip_finish_output+0x58e/0xf90 net/ipv4/ip_output.c:315
 NF_HOOK_COND include/linux/netfilter.h:276 [inline]
 ip_output+0x21d/0x8d0 net/ipv4/ip_output.c:405
 dst_output include/net/dst.h:444 [inline]
 ip_local_out+0xc5/0x1b0 net/ipv4/ip_output.c:124
 iptunnel_xmit+0x56a/0x8d0 net/ipv4/ip_tunnel_core.c:91
 ip_tunnel_xmit+0x1586/0x3ac3 net/ipv4/ip_tunnel.c:778
 __gre_xmit+0x5e1/0x980 net/ipv4/ip_gre.c:451
 ipgre_xmit+0x3e7/0xba0 net/ipv4/ip_gre.c:705
 __netdev_start_xmit include/linux/netdevice.h:4319 [inline]
 netdev_start_xmit include/linux/netdevice.h:4328 [inline]
 xmit_one net/core/dev.c:3219 [inline]
 dev_hard_start_xmit+0x290/0xc90 net/core/dev.c:3235
 __dev_queue_xmit+0x2f39/0x3950 net/core/dev.c:3805
 dev_queue_xmit+0x17/0x20 net/core/dev.c:3838
 __bpf_tx_skb net/core/filter.c:2012 [inline]
 __bpf_redirect_common net/core/filter.c:2050 [inline]
 __bpf_redirect+0x5cf/0xb20 net/core/filter.c:2057
 ____bpf_clone_redirect net/core/filter.c:2090 [inline]
 bpf_clone_redirect+0x2f6/0x490 net/core/filter.c:2062
 bpf_prog_bebbfe2050753572+0x911/0x1000
Modules linked in:
---[ end trace 697e0f3818094a33 ]---
RIP: 0010:ip_do_fragment+0x2454/0x2ad0 net/ipv4/ip_output.c:776
Code: 8b 8d 70 fe ff ff e9 69 e8 ff ff 4c 89 ef e8 b3 5e 3b fb e9 4b e9 ff ff 4c 89 f7 e8 a6 5e 3b fb e9 c3 e5 ff ff e8 1c e3 f7 fa <0f> 0b 4c 89 e7 e8 92 5e 3b fb e9 87 e8 ff ff 4c 89 f7 89 8d 70 fe
RSP: 0018:ffff8801d48ae7d0 EFLAGS: 00010293
RAX: ffff8801d33fe100 RBX: ffff8801bd38c140 RCX: ffffffff86855654
RDX: 0000000000000000 RSI: ffffffff86856cd4 RDI: 0000000000000005
RBP: ffff8801d48ae9a8 R08: ffff8801d33fe100 R09: ffffed003a492e48
R10: ffffed003a492e4a R11: ffff8801d2497253 R12: ffff8801bd38c204
R13: 00000000fffffff2 R14: ffff8801bd38c210 R15: dffffc0000000000
FS:  00000000026c6880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000006cc090 CR3: 00000001cd28b000 CR4: 00000000001406f0