netlink: 5 bytes leftover after parsing attributes in process `syz-executor1'.
usercopy: kernel memory exposure attempt detected from ffff8801d12accce (<wrapped address>) (18446744073709551610 bytes)
------------[ cut here ]------------
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: 13200 Comm: syz-executor6 Not tainted 4.13.0-rc3+ #16
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801dbde43c0 task.stack: ffff8801d0540000
RIP: 0010:report_usercopy mm/usercopy.c:64 [inline]
RIP: 0010:__check_object_size+0x3ad/0x500 mm/usercopy.c:264
RSP: 0018:ffff8801d05478a8 EFLAGS: 00010286
RAX: 0000000000000078 RBX: ffffffff847102c0 RCX: 0000000000000000
RDX: 0000000000000078 RSI: ffffffff8158f35e RDI: ffffed003a0a8f09
RBP: ffff8801d0547998 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d12accce
R13: fffffffffffffffa R14: ffffffff84710280 R15: dffffc0000000000
FS:  00007f70429b2700(0000) GS:ffff8801dc100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f40dad53000 CR3: 00000001daa41000 CR4: 00000000001406e0
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
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:395
 inet_recvmsg+0x14c/0x5f0 net/ipv4/af_inet.c:793
 sock_recvmsg_nosec net/socket.c:792 [inline]
 sock_recvmsg+0xc9/0x110 net/socket.c:799
 SYSC_recvfrom+0x2d6/0x570 net/socket.c:1788
 SyS_recvfrom+0x40/0x50 net/socket.c:1760
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x4512c9
RSP: 002b:00007f70429b1c08 EFLAGS: 00000216 ORIG_RAX: 000000000000002d
RAX: ffffffffffffffda RBX: 0000000000718000 RCX: 00000000004512c9
RDX: 0000000000000000 RSI: 00000000207df000 RDI: 0000000000000006
RBP: 0000000000000082 R08: 000000002034eff6 R09: 0000000000000008
R10: 0000000020000043 R11: 0000000000000216 R12: 00000000004ba720
R13: 00000000ffffffff R14: 0000000000000006 R15: 0000000000000001
Code: 48 0f 44 da e8 c5 d5 ca ff 48 8b 85 28 ff ff ff 4d 89 e9 4c 89 e1 4c 89 f2 48 89 de 48 c7 c7 00 03 71 84 49 89 c0 e8 a8 49 b6 ff <0f> 0b 48 c7 c0 c0 00 71 84 eb 96 48 c7 c0 00 01 71 84 eb 8d 48 
RIP: report_usercopy mm/usercopy.c:64 [inline] RSP: ffff8801d05478a8
RIP: __check_object_size+0x3ad/0x500 mm/usercopy.c:264 RSP: ffff8801d05478a8
---[ end trace 3968f5f6e2b775b3 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..