------------[ cut here ]------------ kernel BUG at ./include/linux/skbuff.h:2073! invalid opcode: 0000 [#1] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 3148 Comm: syzkaller674540 Not tainted 4.15.0-rc4+ #164 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__skb_pull include/linux/skbuff.h:2073 [inline] RIP: 0010:skb_pull_inline include/linux/skbuff.h:2079 [inline] RIP: 0010:skb_pull+0xd5/0xf0 net/core/skbuff.c:1731 RSP: 0018:ffff8801c924f230 EFLAGS: 00010293 RAX: ffff8801cabb4000 RBX: ffff8801ced551c0 RCX: ffffffff841c9355 RDX: 0000000000000000 RSI: 0000000000000028 RDI: ffff8801ced5523c RBP: ffff8801c924f248 R08: 1ffff10039249daf R09: 0000000000000002 R10: ffff8801c924f238 R11: 0000000000000000 R12: 0000000000000028 R13: 0000000000000010 R14: dffffc0000000000 R15: 0000000000000000 FS: 0000000000db8880(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002084c000 CR3: 00000001c9dae003 CR4: 00000000001606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: esp6_gro_receive+0xb4/0xbe0 net/ipv6/esp6_offload.c:63 call_gro_receive include/linux/netdevice.h:2202 [inline] ipv6_gro_receive+0x83e/0x13c0 net/ipv6/ip6_offload.c:253 dev_gro_receive+0xd2c/0x2100 net/core/dev.c:4894 napi_gro_frags+0x377/0xad0 net/core/dev.c:5150 tun_get_user+0x271f/0x3900 drivers/net/tun.c:1791 tun_chr_write_iter+0xb9/0x160 drivers/net/tun.c:1836 call_write_iter include/linux/fs.h:1772 [inline] do_iter_readv_writev+0x525/0x7f0 fs/read_write.c:653 do_iter_write+0x154/0x540 fs/read_write.c:932 vfs_writev+0x18a/0x340 fs/read_write.c:977 do_writev+0xfc/0x2a0 fs/read_write.c:1012 SYSC_writev fs/read_write.c:1085 [inline] SyS_writev+0x27/0x30 fs/read_write.c:1082 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x444e50 RSP: 002b:00007ffed3c6d3c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000444e50 RDX: 0000000000000002 RSI: 00007ffed3c6d3d0 RDI: 0000000000000003 RBP: 00000000006d0018 R08: 000000002084c046 R09: 0000000000000046 R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000402390 R13: 0000000000402420 R14: 0000000000000000 R15: 0000000000000000 Code: a3 d0 00 00 00 e8 1c 5d 53 fd 4c 89 e0 5b 41 5c 41 5d 5d c3 45 31 e4 e8 0a 5d 53 fd 4c 89 e0 5b 41 5c 41 5d 5d c3 e8 fb 5c 53 fd <0f> 0b e8 e4 8d 8a fd eb 9a e8 dd 8d 8a fd e9 51 ff ff ff e8 f3 RIP: __skb_pull include/linux/skbuff.h:2073 [inline] RSP: ffff8801c924f230 RIP: skb_pull_inline include/linux/skbuff.h:2079 [inline] RSP: ffff8801c924f230 RIP: skb_pull+0xd5/0xf0 net/core/skbuff.c:1731 RSP: ffff8801c924f230 ---[ end trace a07734801ab70d94 ]---