linux-kernel - Re: [PATCH RESEND v5 0/5] namei: vfs flags to restrict path resolution

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Message-ID: <20190425194525.5d66uzfqfxmorx2n@yavin>
Date:   Fri, 26 Apr 2019 05:45:25 +1000
From:   Aleksa Sarai <cyphar@...har.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     Andy Lutomirski <luto@...nel.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        Jeff Layton <jlayton@...nel.org>,
        "J. Bruce Fields" <bfields@...ldses.org>,
        Arnd Bergmann <arnd@...db.de>,
        David Howells <dhowells@...hat.com>,
        Eric Biederman <ebiederm@...ssion.com>,
        Jann Horn <jannh@...gle.com>,
        Christian Brauner <christian@...uner.io>,
        David Drysdale <drysdale@...gle.com>,
        Tycho Andersen <tycho@...ho.ws>,
        Linux Containers <containers@...ts.linux-foundation.org>,
        Linux FS Devel <linux-fsdevel@...r.kernel.org>,
        Linux API <linux-api@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Chanho Min <chanho.min@....com>,
        Oleg Nesterov <oleg@...hat.com>, Aleksa Sarai <asarai@...e.de>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-arch <linux-arch@...r.kernel.org>
Subject: Re: [PATCH RESEND v5 0/5] namei: vfs flags to restrict path
 resolution

On 2019-04-25, Aleksa Sarai <cyphar@...har.com> wrote:
> On 2019-04-23, Kees Cook <keescook@...omium.org> wrote:
> > This series provides solutions to so many different race and confusion
> > issues, I'd really like to see it land. What's the next step here? Is
> > this planned to go directly to Linus for v5.2, or is it going to live
> > in -mm for a while? I'd really like to see this moving forward.
> 
> Given some of the security requirements of this interface, I think
> getting it to live in -mm wouldn't be a bad idea so folks can shake the
> bugs out before it's depended on by container runtimes.

Scratch my mention of -mm, it should be in Al's tree since it touches
quite a few of the namei seqlocks. My point was that it should live in
someone's tree for a little bit before it goes into a release.

I will put together a PoC of a resolveat(2) variation of this series and
re-send it out with both versions.

-- 
Aleksa Sarai
Senior Software Engineer (Containers)
SUSE Linux GmbH
<https://www.cyphar.com/>

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