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Message-ID: <33a192fc-9279-6681-32ed-2046ed2e3ce1@virginmedia.com>
Date:   Fri, 2 Jun 2023 08:12:04 +0100
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Subject: Re: Fwd: Started to get "memfd_create() without MFD_EXEC nor
 MFD_NOEXEC_SEAL"
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To:     Bagas Sanjaya <bagasdotme@gmail.com>,
        Kees Cook <keescook@chromium.org>,
        Vlastimil Babka <vbabka@suse.cz>
Cc:     Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux Regressions <regressions@lists.linux.dev>,
        Linux Memory Management List <linux-mm@kvack.org>,
        Jeff Xu <jeffxu@google.com>,
        Daniel Verkamp <dverkamp@chromium.org>,
        David Herrmann <dh.herrmann@gmail.com>,
        Dmitry Torokhov <dmitry.torokhov@gmail.com>,
        Hugh Dickins <hughd@google.com>, Jann Horn <jannh@google.com>,
        Jorge Lucangeli Obes <jorgelo@chromium.org>,
        Shuah Khan <skhan@linuxfoundation.org>,
        Andrew Morton <akpm@linux-foundation.org>
References: <69dad53e-9363-c551-111a-d0051bb0265f@gmail.com>
 <38f847ed-69dc-d5da-5822-bd9da753fc30@suse.cz>
 <202306010710.7F5C39B7A@keescook>
 <74b8e4c0-a557-b047-4507-c243c9aad216@gmail.com>
From:   Stuart Foster <smf-linux@virginmedia.com>
Organization: Linux Development
In-Reply-To: <74b8e4c0-a557-b047-4507-c243c9aad216@gmail.com>
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On 02/06/2023 03:15, Bagas Sanjaya wrote:
> On 6/1/23 21:12, Kees Cook wrote:
>>> Hm indeed it seems to have introduced 2 new flags and immediately warn if
>>> any process doesn't use them. Maybe it would make sense for some of the
>>> non-default values of vm.memfd_noexec, but it's too early to warn
>>> unconditionally everywhere, no?
>>
>> This is pretty standard for getting new options like this noticed by
>> userspace -- there is no regression in _behavior_. It's just a reminder
>> to fix userspace code.
>>
> 
> Telling regzbot:
> 
> #regzbot invalid: not a kernel regression, but userspace fix is needed
> 
> Thanks.
> 

Issue raised with XOrg:

https://gitlab.freedesktop.org/xorg/xserver/-/issues/1553