[PATCH 4/5] RISC-V: Protect .init.text & .init.data

[Atish Patra]

On Tue, Oct 13, 2020 at 6:21 PM Jim Wilson <jimw at sifive.com> wrote:
>
> On Tue, Oct 13, 2020 at 3:25 PM Atish Patra <atishp at atishpatra.org> wrote:
> > This happens only when copy_from_user is called from function that is
> > annotated with __init.
> > Adding Kito & Jim for their input
> >
> > @kito, @Jim: Please let me know if I should create a issue in
> > riscv-gnu-toolchain repo or somewhere else.
>
> I can't do anything useful without a testcase that I can use to
> reproduce the problem.  The interactions here are complex, so pointing
> at lines of code or kernel config options doesn't give me any useful
> info.
>
> Relaxation can convert calls to a jal.  I don't know of any open bugs
> in this area that can generate relocation errors.  if it is a
> relaxation error then turning off relaxation should work around the
> problem as you suggested.
>
> A kernel build problem is serious.  I think this is worth a bug
> report.  FSF binutils or riscv-gnu-toolchain is fine.
>

I have created an issue with detailed descriptions and reproduction steps.
Please let me know if you need anything else.

> Jim



-- 
Regards,
Atish