From: James Morris <jmorris@namei.org>
To: Kees Cook <keescook@chromium.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
David Howells <dhowells@redhat.com>,
"Eric W. Biederman" <ebiederm@xmission.com>,
John Johansen <john.johansen@canonical.com>,
"Serge E. Hallyn" <serge@hallyn.com>,
Paul Moore <paul@paul-moore.com>,
Stephen Smalley <sds@tycho.nsa.gov>,
Casey Schaufler <casey@schaufler-ca.com>,
Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>,
James Morris <james.l.morris@oracle.com>,
Andy Lutomirski <luto@kernel.org>,
linux-fsdevel@vger.kernel.org,
linux-security-module@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 14/15] exec: Use sane stack rlimit under secureexec
Date: Wed, 19 Jul 2017 19:42:53 +1000 (AEST) [thread overview]
Message-ID: <alpine.LRH.2.20.1707191942400.10539@namei.org> (raw)
In-Reply-To: <1500416736-49829-15-git-send-email-keescook@chromium.org>
On Tue, 18 Jul 2017, Kees Cook wrote:
> For a secureexec, before memory layout selection has happened, reset the
> stack rlimit to something sane to avoid the caller having control over
> the resulting layouts.
>
> $ ulimit -s
> 8192
> $ ulimit -s unlimited
> $ /bin/sh -c 'ulimit -s'
> unlimited
> $ sudo /bin/sh -c 'ulimit -s'
> 8192
>
> Cc: Linus Torvalds <torvalds@linux-foundation.org>
> Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: James Morris <james.l.morris@oracle.com>
--
James Morris
<jmorris@namei.org>
WARNING: multiple messages have this Message-ID (diff)
From: jmorris@namei.org (James Morris)
To: linux-security-module@vger.kernel.org
Subject: [PATCH v3 14/15] exec: Use sane stack rlimit under secureexec
Date: Wed, 19 Jul 2017 19:42:53 +1000 (AEST) [thread overview]
Message-ID: <alpine.LRH.2.20.1707191942400.10539@namei.org> (raw)
In-Reply-To: <1500416736-49829-15-git-send-email-keescook@chromium.org>
On Tue, 18 Jul 2017, Kees Cook wrote:
> For a secureexec, before memory layout selection has happened, reset the
> stack rlimit to something sane to avoid the caller having control over
> the resulting layouts.
>
> $ ulimit -s
> 8192
> $ ulimit -s unlimited
> $ /bin/sh -c 'ulimit -s'
> unlimited
> $ sudo /bin/sh -c 'ulimit -s'
> 8192
>
> Cc: Linus Torvalds <torvalds@linux-foundation.org>
> Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: James Morris <james.l.morris@oracle.com>
--
James Morris
<jmorris@namei.org>
--
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next prev parent reply other threads:[~2017-07-19 9:43 UTC|newest]
Thread overview: 104+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-18 22:25 [PATCH v3 00/15] exec: Use sane stack rlimit under secureexec Kees Cook
2017-07-18 22:25 ` Kees Cook
2017-07-18 22:25 ` [PATCH v3 01/15] binfmt: Introduce secureexec flag Kees Cook
2017-07-18 22:25 ` Kees Cook
2017-07-19 0:05 ` John Johansen
2017-07-19 0:05 ` John Johansen
2017-07-19 1:01 ` Andy Lutomirski
2017-07-19 1:01 ` Andy Lutomirski
2017-07-18 22:25 ` [PATCH v3 02/15] exec: Rename bprm->cred_prepared to called_set_creds Kees Cook
2017-07-18 22:25 ` Kees Cook
2017-07-19 0:08 ` John Johansen
2017-07-19 0:08 ` John Johansen
2017-07-19 1:06 ` Andy Lutomirski
2017-07-19 1:06 ` Andy Lutomirski
2017-07-19 4:40 ` Kees Cook
2017-07-19 4:40 ` Kees Cook
2017-07-19 9:19 ` James Morris
2017-07-19 9:19 ` James Morris
2017-07-19 23:56 ` Paul Moore
2017-07-19 23:56 ` Paul Moore
2017-07-18 22:25 ` [PATCH v3 03/15] apparmor: Refactor to remove bprm_secureexec hook Kees Cook
2017-07-18 22:25 ` Kees Cook
2017-07-19 0:00 ` John Johansen
2017-07-19 0:00 ` John Johansen
2017-07-19 9:21 ` James Morris
2017-07-19 9:21 ` James Morris
2017-07-18 22:25 ` [PATCH v3 04/15] selinux: " Kees Cook
2017-07-18 22:25 ` Kees Cook
2017-07-20 0:03 ` Paul Moore
2017-07-20 0:03 ` Paul Moore
2017-07-20 0:19 ` Paul Moore
2017-07-20 0:19 ` Paul Moore
2017-07-20 1:37 ` Kees Cook
2017-07-20 1:37 ` Kees Cook
2017-07-20 13:42 ` Paul Moore
2017-07-20 13:42 ` Paul Moore
2017-07-20 17:06 ` Kees Cook
2017-07-20 17:06 ` Kees Cook
2017-07-20 20:42 ` Paul Moore
2017-07-20 20:42 ` Paul Moore
2017-07-21 15:40 ` Paul Moore
2017-07-21 15:40 ` Paul Moore
2017-07-21 17:37 ` Kees Cook
2017-07-21 17:37 ` Kees Cook
2017-07-21 19:16 ` Paul Moore
2017-07-21 19:16 ` Paul Moore
2017-07-18 22:25 ` [PATCH v3 05/15] smack: " Kees Cook
2017-07-18 22:25 ` Kees Cook
2017-07-26 3:58 ` Kees Cook
2017-07-26 3:58 ` Kees Cook
2017-07-26 15:24 ` Casey Schaufler
2017-07-26 15:24 ` Casey Schaufler
2017-07-18 22:25 ` [PATCH v3 06/15] commoncap: " Kees Cook
2017-07-18 22:25 ` Kees Cook
2017-07-19 1:10 ` Andy Lutomirski
2017-07-19 1:10 ` Andy Lutomirski
2017-07-19 4:41 ` Kees Cook
2017-07-19 4:41 ` Kees Cook
2017-07-20 4:53 ` Andy Lutomirski
2017-07-20 4:53 ` Andy Lutomirski
2017-07-31 22:43 ` Kees Cook
2017-07-31 22:43 ` Kees Cook
2017-08-01 13:12 ` Andy Lutomirski
2017-08-01 13:12 ` Andy Lutomirski
2017-07-19 9:26 ` James Morris
2017-07-19 9:26 ` James Morris
2017-07-18 22:25 ` [PATCH v3 07/15] commoncap: Move cap_elevated calculation into bprm_set_creds Kees Cook
2017-07-18 22:25 ` Kees Cook
2017-07-19 1:52 ` Andy Lutomirski
2017-07-19 1:52 ` Andy Lutomirski
2017-07-19 9:28 ` James Morris
2017-07-19 9:28 ` James Morris
2017-07-18 22:25 ` [PATCH v3 08/15] LSM: drop bprm_secureexec hook Kees Cook
2017-07-18 22:25 ` Kees Cook
2017-07-19 0:02 ` John Johansen
2017-07-19 0:02 ` John Johansen
2017-07-19 9:29 ` James Morris
2017-07-19 9:29 ` James Morris
2017-07-18 22:25 ` [PATCH v3 09/15] exec: Correct comments about "point of no return" Kees Cook
2017-07-18 22:25 ` Kees Cook
2017-07-19 0:45 ` Eric W. Biederman
2017-07-19 0:45 ` Eric W. Biederman
2017-07-18 22:25 ` [PATCH v3 10/15] exec: Use secureexec for setting dumpability Kees Cook
2017-07-18 22:25 ` Kees Cook
2017-07-26 3:59 ` Kees Cook
2017-07-26 3:59 ` Kees Cook
2017-07-18 22:25 ` [PATCH v3 11/15] exec: Use secureexec for clearing pdeath_signal Kees Cook
2017-07-18 22:25 ` Kees Cook
2017-07-18 22:25 ` [PATCH v3 12/15] smack: Remove redundant pdeath_signal clearing Kees Cook
2017-07-18 22:25 ` Kees Cook
2017-07-18 22:25 ` [PATCH v3 13/15] exec: Consolidate dumpability logic Kees Cook
2017-07-18 22:25 ` Kees Cook
2017-07-18 22:25 ` [PATCH v3 14/15] exec: Use sane stack rlimit under secureexec Kees Cook
2017-07-18 22:25 ` Kees Cook
2017-07-19 9:42 ` James Morris [this message]
2017-07-19 9:42 ` James Morris
2017-07-18 22:25 ` [PATCH v3 15/15] exec: Consolidate pdeath_signal clearing Kees Cook
2017-07-18 22:25 ` Kees Cook
2017-07-18 23:03 ` [PATCH v3 00/15] exec: Use sane stack rlimit under secureexec Linus Torvalds
2017-07-18 23:03 ` Linus Torvalds
2017-07-19 3:22 ` Serge E. Hallyn
2017-07-19 3:22 ` Serge E. Hallyn
2017-07-19 5:23 ` Kees Cook
2017-07-19 5:23 ` Kees Cook
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