Received-SPF: pass (google.com: domain of linux-kernel+bounces-40674-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.199.223 as permitted sender) client-ip=147.75.199.223;
Message-ID: <4907a7a3-8533-480a-bc3c-488573e18e66@embeddedor.com>
Date: Fri, 26 Jan 2024 15:30:20 -0600
Precedence: bulk
MIME-Version: 1.0
User-Agent: Mozilla Thunderbird
Subject: Re: [GIT PULL] Enable -Wstringop-overflow globally
To: Linus Torvalds <torvalds@linux-foundation.org>,
 "Gustavo A. R. Silva" <gustavoars@kernel.org>
Cc: Kees Cook <keescook@chromium.org>, linux-hardening@vger.kernel.org,
 linux-kernel@vger.kernel.org
References: <Za6JwRpknVIlfhPF@work>
 <CAHk-=wjG4jdE19-vWWhAX3ByfbNr4DJS-pwiN9oY38WkhMZ57g@mail.gmail.com>
Content-Language: en-US
From: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
In-Reply-To: <CAHk-=wjG4jdE19-vWWhAX3ByfbNr4DJS-pwiN9oY38WkhMZ57g@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit


On 1/26/24 15:22, Linus Torvalds wrote:
> On Mon, 22 Jan 2024 at 07:29, Gustavo A. R. Silva <gustavoars@kernel.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.

Let me take a look.

--
Gustavo