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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: 1 PID: 28410 Comm: syz-executor0 Not tainted 4.13.0-rc4+ #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d9d3c140 task.stack: ffff8801c6bd0000
RIP: 0010:report_usercopy mm/usercopy.c:64 [inline]
RIP: 0010:__check_object_size+0x3ad/0x500 mm/usercopy.c:264
RSP: 0018:ffff8801c6bd78a8 EFLAGS: 00010286
RAX: 0000000000000078 RBX: ffffffff84710f00 RCX: 0000000000000000
RDX: 0000000000000078 RSI: ffffffff8159295e RDI: ffffed0038d7af09
RBP: ffff8801c6bd7998 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801c398108c
R13: fffffffffffffffe R14: ffffffff84710ec0 R15: dffffc0000000000
FS:  00007fd887b5c700(0000) GS:ffff8801dc100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020e32fe4 CR3: 00000001c32b6000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 check_object_size include/linux/thread_info.h:108 [inline]
 check_copy_size include/linux/thread_info.h:139 [inline]
 copy_to_iter include/linux/uio.h:105 [inline]
 copy_linear_skb include/net/udp.h:371 [inline]
 udpv6_recvmsg+0x1040/0x1af0 net/ipv6/udp.c:399
 inet_recvmsg+0x14c/0x5f0 net/ipv4/af_inet.c:793
 sock_recvmsg_nosec net/socket.c:806 [inline]
 sock_recvmsg+0xc9/0x110 net/socket.c:813
 SYSC_recvfrom+0x2d6/0x570 net/socket.c:1802
 SyS_recvfrom+0x40/0x50 net/socket.c:1774
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x4512e9
RSP: 002b:00007fd887b5bc08 EFLAGS: 00000216 ORIG_RAX: 000000000000002d
RAX: ffffffffffffffda RBX: 0000000000718000 RCX: 00000000004512e9
RDX: 0000000000000042 RSI: 0000000020dfd000 RDI: 0000000000000005
RBP: 0000000000000086 R08: 0000000020000000 R09: 0000000000000000
R10: 0000000000000042 R11: 0000000000000216 R12: 0000000000000000
R13: 0000000000a6f7ef R14: 00007fd887b5c9c0 R15: 0000000000000000
Code: 48 0f 44 da e8 35 39 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 0f 71 84 49 89 c0 e8 f8 ac b5 ff <0f> 0b 48 c7 c0 00 0d 71 84 eb 96 48 c7 c0 40 0d 71 84 eb 8d 48 
RIP: report_usercopy mm/usercopy.c:64 [inline] RSP: ffff8801c6bd78a8
RIP: __check_object_size+0x3ad/0x500 mm/usercopy.c:264 RSP: ffff8801c6bd78a8
---[ end trace c1413d456f8631e2 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..