------------[ cut here ]------------
unexpected usercopy with bad or missing whitelist from skbuff_head_cache offset 64 size 16
WARNING: CPU: 0 PID: 10120 at mm/slab.c:4432 __check_heap_object+0xc7/0xd0 mm/slab.c:4431
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 10120 Comm: syz-executor3 Not tainted 4.15.0-rc2-next-20171205+ #59
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 panic+0x1e4/0x41c kernel/panic.c:183
 __warn+0x1dc/0x200 kernel/panic.c:547
 report_bug+0x211/0x2d0 lib/bug.c:184
 fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:177
 fixup_bug arch/x86/kernel/traps.c:246 [inline]
 do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:295
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314
 invalid_op+0x22/0x40 arch/x86/entry/entry_64.S:1066
RIP: 0010:__check_heap_object+0xc7/0xd0 mm/slab.c:4431
RSP: 0018:ffff8801c40bf5c8 EFLAGS: 00010286
RAX: dffffc0000000008 RBX: 1ffff10038817ec1 RCX: ffffffff815a020e
RDX: 00000000000022d2 RSI: ffffc90002735000 RDI: 0000000000000212
RBP: ffff8801c40bf5d0 R08: ffffffff85f3bd78 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000000 R12: ffffea00072c7500
R13: ffff8801cb1d4580 R14: 0000000000000010 R15: ffffea00072c7500
 check_heap_object mm/usercopy.c:222 [inline]
 __check_object_size+0x22c/0x4f0 mm/usercopy.c:248
 check_object_size include/linux/thread_info.h:112 [inline]
 check_copy_size include/linux/thread_info.h:143 [inline]
 copy_to_user include/linux/uaccess.h:154 [inline]
 put_cmsg+0x233/0x3f0 net/core/scm.c:242
 sock_recv_errqueue+0x1fa/0x3d0 net/core/sock.c:2903
 packet_recvmsg+0xb25/0x1790 net/packet/af_packet.c:3295
 sock_recvmsg_nosec net/socket.c:809 [inline]
 sock_recvmsg+0xc9/0x110 net/socket.c:816
 ___sys_recvmsg+0x29b/0x630 net/socket.c:2185
 __sys_recvmmsg+0x2a9/0xaf0 net/socket.c:2293
 SYSC_recvmmsg net/socket.c:2374 [inline]
 SyS_recvmmsg+0xc4/0x160 net/socket.c:2358
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x4529d9
RSP: 002b:00007fab74563c58 EFLAGS: 00000212 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 00000000004529d9
RDX: 0000000000000002 RSI: 000000002079cf88 RDI: 0000000000000013
RBP: 000000000000039b R08: 0000000020000000 R09: 0000000000000000
R10: 0000000000012022 R11: 0000000000000212 R12: 00000000006f2728
R13: 00000000ffffffff R14: 00007fab745646d4 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..