[RFC][patch for gcc12][version 1] add -ftrivial-auto-var-init and variable attribute "uninitialized" to gcc

Kees Cook keescook@chromium.org
Tue Jun 1 23:04:25 GMT 2021

On Tue, Jun 01, 2021 at 04:35:53PM -0400, David Malcolm wrote:
> [...]
> Did this patch get reviewed/approved?

It's still under review, but I think it's close.

> Is the latest version still this one:
>   https://gcc.gnu.org/pipermail/gcc-patches/2021-February/565581.html
> or is there a more recent version that should be reviewed?

Yup, here's the latest (v3):

> (I don't think I'm qualified to approve the patch, I'm just a fan of
> the approach.  FWIW I've been experimenting with extending -fanalyzer
> to detect infoleaks in the kernel, whereas AIUI this patch is about
> mitigating them)

Thanks for your interest! If you patch your GCC with this, it should
Just Work in the kernel (i.e. you can set CONFIG_INIT_STACK_ALL_ZERO=y)

> Hope this is constructive

Yup! Please report back any testing; that'll help show people are
interested in the feature. :)

Kees Cook

More information about the Gcc-patches mailing list