Comment 2 for bug 1771844

------- Comment From <email address hidden> 2018-05-22 00:13 EDT-------
(In reply to comment #5)
> I built a test kernel with commit df78d3f6148092d33a9a24c7a9cfac3d0220b484.
> The test kernel can be downloaded from:
> http://kernel.ubuntu.com/~jsalisbury/lp1771844
>
> Can you test this kernel and see if it resolves this bug?
>
> Note about installing test kernels:
> ? If the test kernel is prior to 4.15(Bionic) you need to install the
> linux-image and linux-image-extra .deb packages.
> ? If the test kernel is 4.15(Bionic) or newer, you need to install the
> linux-image-unsigned, linux-modules and linux-modules-extra .deb packages.
>
> Thanks in advance!

Thanks for building the kernel with the patch. Can you share the kernel sources, so that can I build the livepatch modules based on the sources. Standard .config, does not build the samples/livepatch to do the basic testing.
cat /boot/config-4.15.0-20-generic |grep -i livepatch
CONFIG_HAVE_LIVEPATCH=y
CONFIG_LIVEPATCH=y

I would also try to build livepatch modules other than the sample modules in the kernel sources to verify save_stack_trace functionality.