linux-hardening - Re: [GIT PULL] Enable -Wstringop-overflow globally

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Message-ID: <CAHk-=wjG4jdE19-vWWhAX3ByfbNr4DJS-pwiN9oY38WkhMZ57g@mail.gmail.com>
Date: Fri, 26 Jan 2024 13:22:42 -0800
From: Linus Torvalds <torvalds@...ux-foundation.org>
To: "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: Kees Cook <keescook@...omium.org>, linux-hardening@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [GIT PULL] Enable -Wstringop-overflow globally

On Mon, 22 Jan 2024 at 07:29, Gustavo A. R. Silva <gustavoars@...nel.org> wrote:
>
> Enable -Wstringop-overflow globally

I suspect I'll have to revert this.

On arm64, I get a "writing 16 bytes into a region of size 0" in the Xe driver

   drivers/gpu/drm/xe/xe_gt_pagefault.c:340

but I haven't looked into it much yet.

It's not some gcc-11 issue, though, this is with gcc version 13.2.1

It looks like the kernel test robot reported this too (for s390), at

    https://lore.kernel.org/all/202401161031.hjGJHMiJ-lkp@intel.com/T/

and in that case it was gcc-13.2.0.

So I don't think the issue is about gcc-11 at all, but about other
random details.

             Linus