Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Subject: Re: [PATCH v2 0/7] Remove in-tree usage of MAP_DENYWRITE
To:     linux-kernel@vger.kernel.org,
        Linus Torvalds <torvalds@linux-foundation.org>
Cc:     Andrew Morton <akpm@linux-foundation.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Alexander Viro <viro@zeniv.linux.org.uk>,
        Alexey Dobriyan <adobriyan@gmail.com>,
        Steven Rostedt <rostedt@goodmis.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Jiri Olsa <jolsa@redhat.com>,
        Namhyung Kim <namhyung@kernel.org>,
        Petr Mladek <pmladek@suse.com>,
        Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
        Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        Rasmus Villemoes <linux@rasmusvillemoes.dk>,
        Kees Cook <keescook@chromium.org>,
        "Eric W. Biederman" <ebiederm@xmission.com>,
        Greg Ungerer <gerg@linux-m68k.org>,
        Geert Uytterhoeven <geert@linux-m68k.org>,
        Mike Rapoport <rppt@kernel.org>,
        Vlastimil Babka <vbabka@suse.cz>,
        Vincenzo Frascino <vincenzo.frascino@arm.com>,
        Chinwen Chang <chinwen.chang@mediatek.com>,
        Catalin Marinas <catalin.marinas@arm.com>,
        "Matthew Wilcox (Oracle)" <willy@infradead.org>,
        Huang Ying <ying.huang@intel.com>,
        Jann Horn <jannh@google.com>, Feng Tang <feng.tang@intel.com>,
        Kevin Brodsky <Kevin.Brodsky@arm.com>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Shawn Anastasio <shawn@anastas.io>,
        Steven Price <steven.price@arm.com>,
        Nicholas Piggin <npiggin@gmail.com>,
        Christian Brauner <christian.brauner@ubuntu.com>,
        Jens Axboe <axboe@kernel.dk>,
        Gabriel Krisman Bertazi <krisman@collabora.com>,
        Peter Xu <peterx@redhat.com>,
        Suren Baghdasaryan <surenb@google.com>,
        Shakeel Butt <shakeelb@google.com>,
        Marco Elver <elver@google.com>,
        Daniel Jordan <daniel.m.jordan@oracle.com>,
        Nicolas Viennot <Nicolas.Viennot@twosigma.com>,
        Thomas Cedeno <thomascedeno@google.com>,
        Michal Hocko <mhocko@suse.com>,
        Miklos Szeredi <miklos@szeredi.hu>,
        Chengguang Xu <cgxu519@mykernel.net>,
        =?UTF-8?Q?Christian_K=c3=b6nig?= <ckoenig.leichtzumerken@gmail.com>,
        Florian Weimer <fweimer@redhat.com>,
        David Laight <David.Laight@ACULAB.COM>,
        linux-unionfs@vger.kernel.org, linux-api@vger.kernel.org,
        x86@kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org
References: <20210816194840.42769-1-david@redhat.com>
From:   David Hildenbrand <david@redhat.com>
Organization: Red Hat
Message-ID: <7c57a16b-8184-36a3-fcdc-5e751184827b@redhat.com>
Date:   Fri, 3 Sep 2021 11:45:01 +0200
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101
 Thunderbird/78.11.0
MIME-Version: 1.0
In-Reply-To: <20210816194840.42769-1-david@redhat.com>
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Precedence: bulk

On 16.08.21 21:48, David Hildenbrand wrote:
> This series removes all in-tree usage of MAP_DENYWRITE from the kernel
> and removes VM_DENYWRITE. We stopped supporting MAP_DENYWRITE for
> user space applications a while ago because of the chance for DoS.
> The last renaming user is binfmt binary loading during exec and
> legacy library loading via uselib().
> 

So, how do we want to continue with this? Pick it up for v5.15? Have it 
in -next for a while and eventually pick it up for v5.16?

I think the "remove ETXTBSY completely" and "remove the sanity mapping 
check" thingies should be done on top.

-- 
Thanks,

David / dhildenb