From: Cyrill Gorcunov <gorcunov@gmail.com>
To: Kees Cook <keescook@chromium.org>
Cc: Andrew Vagin <avagin@parallels.com>,
Andrew Morton <akpm@linux-foundation.org>,
LKML <linux-kernel@vger.kernel.org>, Tejun Heo <tj@kernel.org>,
Andrew Vagin <avagin@openvz.org>,
"Eric W. Biederman" <ebiederm@xmission.com>,
Serge Hallyn <serge.hallyn@canonical.com>,
Pavel Emelyanov <xemul@parallels.com>,
Vasiliy Kulikov <segoon@openwall.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Michael Kerrisk <mtk.manpages@gmail.com>,
Julien Tinnes <jln@google.com>
Subject: Re: [RFC 2/2] prctl: PR_SET_MM -- Introduce PR_SET_MM_MAP operation
Date: Thu, 24 Jul 2014 22:50:13 +0400 [thread overview]
Message-ID: <20140724185013.GB17876@moon> (raw)
In-Reply-To: <CAGXu5j+=i7hgyMjRRvvk8uuT_eyoD9wGNhcdZZQgQiwDoSoMXA@mail.gmail.com>
On Thu, Jul 24, 2014 at 11:44:50AM -0700, Kees Cook wrote:
...
> >
> > The file can have a suid bit, so after executing it we may lose ability
> > to attach to it. To check that we can check that uid and gid is zero
> > in a current userns (local root).
> >
> > What else do we need to check?
>
> Yeah, I think all the checks are sufficient, but I (and Julien) are
> still trying to think about side-effects.
>
> It would be nice if these checks (like the rlimit checks) were merged
> into some common helper. That way if something changes in the exec
> path, it won't go missed in the c/r path.
For rlimit I've done a separate helper in new rfc series, please take a look.
prev parent reply other threads:[~2014-07-24 18:50 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-03 14:33 [RFC 0/2] prctl: set-mm -- Rework interface Cyrill Gorcunov
2014-07-03 14:33 ` [RFC 1/2] prctl: PR_SET_MM -- Factor out mmap_sem when update mm::exe_file Cyrill Gorcunov
2014-07-03 14:33 ` [RFC 2/2] prctl: PR_SET_MM -- Introduce PR_SET_MM_MAP operation Cyrill Gorcunov
2014-07-03 20:34 ` Cyrill Gorcunov
2014-07-04 7:52 ` Andrew Vagin
2014-07-04 8:11 ` Cyrill Gorcunov
2014-07-08 19:08 ` Cyrill Gorcunov
2014-07-08 21:38 ` Andrew Morton
2014-07-08 22:13 ` Cyrill Gorcunov
2014-07-09 14:13 ` Cyrill Gorcunov
2014-07-09 14:53 ` Kees Cook
2014-07-09 15:06 ` Cyrill Gorcunov
2014-07-11 17:36 ` Cyrill Gorcunov
2014-07-22 20:07 ` Kees Cook
2014-07-22 20:36 ` Cyrill Gorcunov
2014-07-24 13:48 ` Andrew Vagin
2014-07-24 16:42 ` Cyrill Gorcunov
2014-07-24 18:44 ` Kees Cook
2014-07-24 18:50 ` Cyrill Gorcunov [this message]
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