From: James Morris <jmorris@namei.org>
To: Paul Moore <paul@paul-moore.com>
Cc: linux-security-module@vger.kernel.org, selinux@vger.kernel.org,
cj.chengjian@huawei.com, john.johansen@canonical.com,
casey@schaufler-ca.com
Subject: Re: [PATCH] proc: prevent changes to overridden credentials
Date: Sat, 20 Apr 2019 06:26:58 +1000 (AEST) [thread overview]
Message-ID: <alpine.LRH.2.21.1904200626400.21756@namei.org> (raw)
In-Reply-To: <CAHC9VhQKE3Rnbz8qxm0UKNB=GT6xPu-Le=ZZM0_XisOS+v3jKg@mail.gmail.com>
On Fri, 19 Apr 2019, Paul Moore wrote:
> On Fri, Apr 19, 2019 at 2:55 PM Paul Moore <paul@paul-moore.com> wrote:
> > Prevent userspace from changing the the /proc/PID/attr values if the
> > task's credentials are currently overriden. This not only makes sense
> > conceptually, it also prevents some really bizarre error cases caused
> > when trying to commit credentials to a task with overridden
> > credentials.
> >
> > Cc: <stable@vger.kernel.org>
> > Reported-by: "chengjian (D)" <cj.chengjian@huawei.com>
> > Signed-off-by: Paul Moore <paul@paul-moore.com>
> > ---
> > fs/proc/base.c | 5 +++++
> > 1 file changed, 5 insertions(+)
>
> I sent this to the LSM list as I figure it should probably go via
> James' linux-security tree since it is cross-LSM and doesn't really
> contain any LSM specific code. That said, if you don't want this
> James let me know and I'll send it via the SELinux tree assuming I can
> get ACKs from John and Casey (this should only affect SELinux,
> AppArmor, and Smack).
This is fine to go via your tree.
Acked-by: James Morris <james.morris@microsoft.com>
--
James Morris
<jmorris@namei.org>
next prev parent reply other threads:[~2019-04-19 20:27 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-19 18:55 [PATCH] proc: prevent changes to overridden credentials Paul Moore
2019-04-19 18:59 ` Paul Moore
2019-04-19 20:26 ` James Morris [this message]
2019-04-29 13:57 ` Paul Moore
2019-04-19 19:03 ` John Johansen
2019-04-21 17:14 ` Casey Schaufler
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