------------[ 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: 0 PID: 2703 Comm: syz-executor1 Not tainted 4.15.0-rc7+ #187 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+0xe8/0x110 net/core/skbuff.c:1731 RSP: 0018:ffff8801cc25f230 EFLAGS: 00010216 RAX: 0000000000010000 RBX: ffff8801ce60fb40 RCX: ffffffff8432a3f8 RDX: 00000000000001d9 RSI: ffffc90002d10000 RDI: ffff8801ce60fbc4 RBP: ffff8801cc25f248 R08: 1ffff1003984bdaf R09: 0000000000000002 R10: ffff8801cc25f238 R11: 0000000000000000 R12: 0000000000000028 R13: 0000000000000030 R14: dffffc0000000000 R15: ffff8801bc6245ca FS: 00007f096fb71700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 netlink: 2 bytes leftover after parsing attributes in process `syz-executor6'. CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f40a0fd1db8 CR3: 00000001bccd8001 CR4: 00000000001606f0 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 netlink: 2 bytes leftover after parsing attributes in process `syz-executor6'. call_gro_receive include/linux/netdevice.h:2201 [inline] ipv6_gro_receive+0x844/0x13e0 net/ipv6/ip6_offload.c:253 dev_gro_receive+0xd38/0x2110 net/core/dev.c:4935 napi_gro_frags+0x386/0xaf0 net/core/dev.c:5191 tun_get_user+0x2760/0x3940 drivers/net/tun.c:1907 tun_chr_write_iter+0xb9/0x160 drivers/net/tun.c:1952 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+0x23/0x9a RIP: 0033:0x452bd1 RSP: 002b:00007f096fb70b80 EFLAGS: 00000293 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452bd1 RDX: 0000000000000002 RSI: 00007f096fb70bd0 RDI: 0000000000000012 RBP: 000000000000004f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000066 R11: 0000000000000293 R12: 00000000006ee808 R13: 00000000ffffffff R14: 00007f096fb716d4 R15: 0000000000000000 Code: a3 d8 00 00 00 e8 69 7a 3d fd 4c 89 e0 5b 41 5c 41 5d 5d c3 45 31 e4 e8 57 7a 3d fd 4c 89 e0 5b 41 5c 41 5d 5d c3 e8 48 7a 3d fd <0f> 0b e8 a1 5e 75 fd eb 97 e8 9a 5e 75 fd e9 41 ff ff ff e8 b0 RIP: __skb_pull include/linux/skbuff.h:2073 [inline] RSP: ffff8801cc25f230 RIP: skb_pull_inline include/linux/skbuff.h:2079 [inline] RSP: ffff8801cc25f230 RIP: skb_pull+0xe8/0x110 net/core/skbuff.c:1731 RSP: ffff8801cc25f230 ---[ end trace e28ed0cf7344131a ]---