linux-kernel - Re: Build regressions/improvements in v6.0-rc4

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Date:   Wed, 7 Sep 2022 16:47:33 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     linux-kernel@...r.kernel.org, linux-sh@...r.kernel.org,
        amd-gfx@...ts.freedesktop.org, linux-s390@...r.kernel.org,
        linux-hardening@...r.kernel.org
Subject: Re: Build regressions/improvements in v6.0-rc4

On Mon, Sep 05, 2022 at 09:46:01AM +0200, Geert Uytterhoeven wrote:
> On Mon, 5 Sep 2022, Geert Uytterhoeven wrote:
> > JFYI, when comparing v6.0-rc4[1] to v6.0-rc3[3], the summaries are:
> >  - build errors: +3/-16
> 
>   + /kisskb/src/arch/sh/kernel/machvec.c: error: array subscript 'struct sh_machine_vector[0]' is partly outside array bounds of 'long int[1]' [-Werror=array-bounds]:  => 105:33
> 
> sh4-gcc11/sh-allyesconfig (-Werror)

Sent a patch for this:
https://lore.kernel.org/linux-hardening/20220907234345.96798-1-keescook@chromium.org/

>   + /kisskb/src/include/linux/fortify-string.h: error: call to '__write_overflow_field' declared with attribute warning: detected write beyond size of field (1st parameter); maybe use struct_group()? [-Werror=attribute-warning]:  => 258:25
> 
> s390x-gcc11/s390-allyesconfig (inlined from 'copy_process' at /kisskb/src/kernel/fork.c:2200:2)

This error appears to have vanished?

> > [3] http://kisskb.ellerman.id.au/kisskb/branch/linus/head/b90cb1053190353cc30f0fef0ef1f378ccc063c5/ (all 135 configs)

Status	Date/time	Target
OK	Sep 7, 13:54	linus/s390-allyesconfig/s390x-gcc11

-- 
Kees Cook