unexpected usercopy with bad or missing whitelist from skbuff_head_cache offset 64 size 16
WARNING: CPU: 1 PID: 20375 at mm/slab.c:4429 __check_heap_object+0xc7/0xd0 mm/slab.c:4428
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 20375 Comm: syz-executor3 Not tainted 4.15.0-rc4-next-20171221+ #78
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:1079
RIP: 0010:__check_heap_object+0xc7/0xd0 mm/slab.c:4428
RSP: 0018:ffff8801bf13f748 EFLAGS: 00010282
RAX: dffffc0000000008 RBX: 1ffff10037e27ef1 RCX: ffffffff8159f9ce
RDX: 0000000000001e02 RSI: ffffc90002d9c000 RDI: 0000000000000216
RBP: ffff8801bf13f750 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000000 R12: ffffea00073ee2c0
R13: ffff8801cfb8b680 R14: 0000000000000010 R15: ffffea00073ee2c0
 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:2913
 packet_recvmsg+0xb25/0x1790 net/packet/af_packet.c:3295
 sock_recvmsg_nosec net/socket.c:801 [inline]
 sock_recvmsg+0xc9/0x110 net/socket.c:808
 ___sys_recvmsg+0x2a4/0x640 net/socket.c:2177
 __sys_recvmsg+0xe2/0x210 net/socket.c:2222
 SYSC_recvmsg net/socket.c:2234 [inline]
 SyS_recvmsg+0x2d/0x50 net/socket.c:2229
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x452ac9
RSP: 002b:00007faeb34d3c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00007faeb34d4700 RCX: 0000000000452ac9
RDX: 0000000000002000 RSI: 0000000020748fc8 RDI: 0000000000000013
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000000
R13: 0000000000a2f7ef R14: 00007faeb34d49c0 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..