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kernel BUG at mm/usercopy.c:72!
invalid opcode: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 24027 Comm: syz-executor5 Not tainted 4.13.0-rc4+ #26
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801daf96040 task.stack: ffff8801c2918000
RIP: 0010:report_usercopy mm/usercopy.c:64 [inline]
RIP: 0010:__check_object_size+0x3ad/0x500 mm/usercopy.c:264
RSP: 0018:ffff8801c291f5a8 EFLAGS: 00010286
RAX: 0000000000000078 RBX: ffffffff84710200 RCX: 0000000000000000
RDX: 0000000000000078 RSI: ffffffff815928ee RDI: ffffed0038523ea9
RBP: ffff8801c291f698 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801c40460ca
R13: ffffffffffffffff R14: ffffffff847101c0 R15: dffffc0000000000
FS:  00007f4c2c599700(0000) GS:ffff8801dc000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff61af2c50 CR3: 00000001cdc26000 CR4: 00000000001406f0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 udpv6_recvmsg+0x1040/0x1af0 net/ipv6/udp.c:368
 sock_rps_record_flow include/net/sock.h:946 [inline]
 inet_recvmsg+0x14c/0x5f0 net/ipv4/af_inet.c:791
 sock_recvmsg_nosec net/socket.c:792 [inline]
 sock_recvmsg+0xc9/0x110 net/socket.c:799
 ___sys_recvmsg+0x295/0x620 net/socket.c:2194
 __sys_recvmmsg+0x2a9/0xaf0 net/socket.c:2302
 SYSC_recvmmsg net/socket.c:2383 [inline]
 SyS_recvmmsg+0xc4/0x160 net/socket.c:2367
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x4512e9
RSP: 002b:00007f4c2c598c08 EFLAGS: 00000216 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00000000007180a8 RCX: 00000000004512e9
RDX: 0000000000000005 RSI: 00000000208dbe80 RDI: 0000000000000005
RBP: 0000000000000086 R08: 0000000020000000 R09: 0000000000000000
R10: 0000000000010003 R11: 0000000000000216 R12: 00000000004b9fdc
R13: 00000000ffffffff R14: 0000000000000005 R15: 00000000208d6f95
Code: 48 0f 44 da e8 85 d3 ca ff 48 8b 85 28 ff ff ff 4d 89 e9 4c 89 e1 4c 89 f2 48 89 de 48 c7 c7 40 02 71 84 49 89 c0 e8 48 47 b6 ff <0f> 0b 48 c7 c0 00 00 71 84 eb 96 48 c7 c0 40 00 71 84 eb 8d 48 
RIP: report_usercopy mm/usercopy.c:64 [inline] RSP: ffff8801c291f5a8
RIP: __check_object_size+0x3ad/0x500 mm/usercopy.c:264 RSP: ffff8801c291f5a8
---[ end trace aef0f8593f005240 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..