nla_parse: 6 callbacks suppressed
netlink: 188 bytes leftover after parsing attributes in process `syz-executor1'.
skbuff: skb_under_panic: text:00000000bd0f78d2 len:103 put:24 head:000000007b6b4bea data:000000003d971da9 tail:0x4f end:0xc0 dev:gre0
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:104!
invalid opcode: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 10023 Comm: syz-executor3 Not tainted 4.15.0-rc8+ #205
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:skb_panic+0x162/0x1f0 net/core/skbuff.c:100
RSP: 0018:ffff8801af25faa8 EFLAGS: 00010286
RAX: 0000000000000085 RBX: ffff8801be152a40 RCX: 0000000000000000
RDX: 0000000000000085 RSI: ffffc90003d38000 RDI: ffffed0035e4bf49
RBP: ffff8801af25fb10 R08: 1ffff10035e4beed R09: 0000000000000000
R10: 000000000000000a R11: 0000000000000000 R12: ffffffff861fb220
R13: ffffffff84a5f0ad R14: 0000000000000018 R15: ffff8801af06e840
FS:  00007f3ec1216700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002059efa0 CR3: 00000001d0a61001 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 skb_under_panic net/core/skbuff.c:114 [inline]
 skb_push+0xce/0xf0 net/core/skbuff.c:1714
 ipgre_header+0x6d/0x4e0 net/ipv4/ip_gre.c:879
 dev_hard_header include/linux/netdevice.h:2731 [inline]
 pppoe_sendmsg+0x58e/0x8b0 drivers/net/ppp/pppoe.c:890
 sock_sendmsg_nosec net/socket.c:630 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:640
 SYSC_sendto+0x361/0x5c0 net/socket.c:1721
 SyS_sendto+0x40/0x50 net/socket.c:1689
 entry_SYSCALL_64_fastpath+0x29/0xa0
RIP: 0033:0x452f19
RSP: 002b:00007f3ec1215c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452f19
RDX: 0000000000000049 RSI: 0000000020d92000 RDI: 0000000000000013
RBP: 00000000000005ca R08: 000000002059efa0 R09: 0000000000000060
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f7b90
R13: 00000000ffffffff R14: 00007f3ec12166d4 R15: 0000000000000000
Code: 04 01 84 c0 74 04 3c 03 7e 23 8b 8b 80 00 00 00 41 57 48 c7 c7 e0 aa 1f 86 52 56 4c 89 ea 41 50 4c 89 e6 45 89 f0 e8 66 e2 26 fd <0f> 0b 4c 89 4d b8 4c 89 45 c0 48 89 75 c8 48 89 55 d0 e8 87 3a 
RIP: skb_panic+0x162/0x1f0 net/core/skbuff.c:100 RSP: ffff8801af25faa8
---[ end trace f0fdf2ccd415ed5f ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
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Kernel Offset: disabled
Rebooting in 86400 seconds..