Version magic issue since 4.10

[Bread Cutter]

Hi all,

I'm running Ubuntu 16.04, and recently upgraded to the 4.10 kernel
(4.10.0-27-generic #30~16.04.2-Ubuntu).

In prior versions (4.8.x), I was able to checkout the tag, and build
the KVM module. I'm doing this so I can make modifications, but the
same issue occurs if I build it straight from the original source. My
build steps are as follows:

git checkout Ubuntu-hwe-4.10.0-27.30_16.04.2
cp /usr/src/linux-headers-`uname -r`/Module.symvers ./
cp /boot/config-`uname -r` ./.config
make oldconfig
make prepare
make modules_prepare
make scripts
make -j4 SUBDIRS=arch/x86/kvm/

This always produced usable kernel modules in the past, but with the
4.10 series, modprobe prints "Exec format error", and I see this error
in dmesg:

kvm: version magic '4.10.17 SMP mod_unload ' should be
'4.10.0-27-generic SMP mod_unload

Why is the version magic reporting 4.10.17 when I build myself? And
how do I have it build as 4.10.0-27-generic instead?

Thanks!