skbuff: skb_over_panic: text:ffffffff832126e3 len:64940 put:64940 head:ffff8801d20c9900 data:ffff8801d20c9990 tail:0xfe3c end:0xc0 dev:<NULL>
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:104!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 18441 Comm: syz-executor5 Not tainted 4.4.131-gaa3863d #39
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d7d41800 task.stack: ffff88018b310000
RIP: 0010:[<ffffffff838936dc>]  [<ffffffff838936dc>] skb_panic+0x166/0x168 net/core/skbuff.c:100
RSP: 0018:ffff88018b317398  EFLAGS: 00010286
RAX: 000000000000008d RBX: ffff8801bd1aa000 RCX: ffffc90007947000
RDX: 0000000000000000 RSI: ffffffff8125d029 RDI: ffff8801d7d420dc
RBP: ffff88018b317400 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffffffff83ec3ee0
R13: ffff8801d20c9990 R14: 000000000000fe3c R15: 00000000000000c0
FS:  0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f5776b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000000811c0b4 CR3: 00000001ce4cd000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801d20c9990 000000000000fe3c 00000000000000c0 ffffffff83ec3ee0
 0000000000000000 ffffffff83ec43e0 ffffffff832126e3 0000fdac00000001
 ffff8801bd1aa000 ffffffff832126e3 ffff8801d20c9990 000000000000fdac
Call Trace:
 [<ffffffff83893724>] skb_over_panic net/core/skbuff.c:109 [inline]
 [<ffffffff83893724>] skb_put.cold.72+0x23/0x23 net/core/skbuff.c:1361
 [<ffffffff832126e3>] __ip_append_data.isra.44+0x1cf3/0x2920 net/ipv4/ip_output.c:1026
 [<ffffffff832133f4>] ip_append_data.part.46+0xe4/0x150 net/ipv4/ip_output.c:1192
 [<ffffffff8321b848>] ip_append_data+0x68/0x80 net/ipv4/ip_output.c:1181
 [<ffffffff832ce3d0>] udp_sendmsg+0x9a0/0x1bb0 net/ipv4/udp.c:1096
 [<ffffffff834940bd>] udpv6_sendmsg+0x12cd/0x24c0 net/ipv6/udp.c:1173
 [<ffffffff832fec53>] inet_sendmsg+0x203/0x4d0 net/ipv4/af_inet.c:755
 [<ffffffff82f1cd3c>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82f1cd3c>] sock_sendmsg+0xcc/0x110 net/socket.c:635
 [<ffffffff82f1da1c>] SYSC_sendto+0x21c/0x370 net/socket.c:1665
 [<ffffffff82f200a0>] SyS_sendto+0x40/0x50 net/socket.c:1633
 [<ffffffff81006d96>] do_syscall_32_irqs_on arch/x86/entry/common.c:392 [inline]
 [<ffffffff81006d96>] do_fast_syscall_32+0x326/0x8b0 arch/x86/entry/common.c:459
 [<ffffffff838c17aa>] sysenter_flags_fixed+0xd/0x17
Code: 3b 59 c6 fd 4c 8b 4d b8 8b 4b 78 41 54 48 c7 c7 20 3f ec 83 44 8b 45 d4 41 57 48 8b 55 c8 41 56 48 8b 75 c0 41 55 e8 9d 17 b8 fd <0f> 0b e8 fd da ab fd 4c 8b 65 08 e8 e4 42 c6 fd 48 c7 c1 a0 43 
RIP  [<ffffffff838936dc>] skb_panic+0x166/0x168 net/core/skbuff.c:100
 RSP <ffff88018b317398>
---[ end trace b29f1c2123d354a5 ]---