linux-kernel - Re: [PATCH 2/2] exec: increase BINPRM_BUF

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Date:   Fri, 16 Nov 2018 17:49:11 +0000
From:   Alan Cox <gnomes@...rguk.ukuu.org.uk>
To:     Oleg Nesterov <oleg@...hat.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Ben Woodard <woodard@...hat.com>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Kees Cook <keescook@...omium.org>,
        Michal Hocko <mhocko@...e.com>, linux-kernel@...r.kernel.org,
        linux-man@...r.kernel.org
Subject: Re: [PATCH 2/2] exec: increase BINPRM_BUF_SIZE to 256

On Mon, 12 Nov 2018 17:09:56 +0100
Oleg Nesterov <oleg@...hat.com> wrote:

> Large enterprise clients often times run applications out of networked
> file systems where the IT mandated layout of project volumes can end up
> leading to paths that are longer than 128 characters. Bumping this up to
> the next order of two solves this problem in all but the most egregious
> case while still fitting into a 512b slab.

You also need to update the execve manual page as it explicitly documents
the 128 byte limit.

Alan