Re: [RFC PATCH 00/21] KCFI support

Sami Tolvanen
2022-05-04T16:43:21Z

Hi Mark,

On Wed, May 4, 2022 at 9:18 AM Mark Rutland <mark.rutland@arm.com> wrote:
> I wanted to give this a spin on arm64, but I'm seeing some very odd toolchain
> behaviour. I'm not sure if I've done something wrong, or if I'm just hitting an
> edge-case, but it looks like using -fsanitize=kcfi causes the toolchain to hit
> out-of-memory errors and other issues which look like they could be memory
> corruption.

Thanks for the detailed bug report! It definitely looks like something
is wrong with the recent switch from std::string to Twine in the Clang
code. I didn't see this issue when compiling the arm64 kernel, but
I'll take a closer look and see if I can reproduce it.

Sami