linux-hardening - Re: v6.13-rc1 build errors from kernel/auditsc.c

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Message-ID: <CALOAHbCz7mpxv3Dt9jJtJJ2g=A6Nf_rn687BHgOmrzQt3Udv_w@mail.gmail.com>
Date: Tue, 3 Dec 2024 12:03:24 +0800
From: Yafang Shao <laoar.shao@...il.com>
To: Paul Moore <paul@...l-moore.com>
Cc: "Zhuo, Qiuxu" <qiuxu.zhuo@...el.com>, Kees Cook <keescook@...omium.org>, 
	Eric Paris <eparis@...hat.com>, "audit@...r.kernel.org" <audit@...r.kernel.org>, 
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, linux-hardening@...r.kernel.org
Subject: Re: v6.13-rc1 build errors from kernel/auditsc.c

On Tue, Dec 3, 2024 at 11:35 AM Paul Moore <paul@...l-moore.com> wrote:
>
> On Mon, Dec 2, 2024 at 10:19 PM Zhuo, Qiuxu <qiuxu.zhuo@...el.com> wrote:
> >
> > Hi,
> >
> > I got the following build errors from kernel/auditsc.c file.
> >
> > The GCC version      : 7.5.0
> > Kernel version         : v6.13-rc1
> > The bisect commit : 286d7a54c8a2 ("auditsc: replace memcpy() with strscpy()")
>
> Unfortunately this is a known GCC bug, see the lore link below.  Kees,
> Yafang, do you have any more information or compiler-based workarounds
> for this bug?
>
> https://lore.kernel.org/all/CALOAHbBB-__eyERw82QnS3Wmgi7_BpPaacY2urVmpWX3ZkVtvQ@mail.gmail.com/

I'll prepare a patch based on Kees's changes soon. For now, let's
implement a workaround.

-- 
Regards
Yafang