From: Paul Moore <pmoore@redhat.com>
To: "Daniel P. Berrange" <berrange@redhat.com>
Cc: namnamc@safe-mail.net, qemu-devel@nongnu.org,
eduardo.otubo@profitbricks.com
Subject: Re: [Qemu-devel] [PATCH] Add a few argument filters to the seccomp sandbox
Date: Fri, 11 Sep 2015 14:58:56 -0400 [thread overview]
Message-ID: <1978729.K9nur9QBLH@sifl> (raw)
In-Reply-To: <20150910144852.GM11366@redhat.com>
On Thursday, September 10, 2015 03:48:52 PM Daniel P. Berrange wrote:
> On Wed, Sep 09, 2015 at 09:55:33PM -0400, namnamc@Safe-mail.net wrote:
> > +
> > + /* shmget */
> > + rc = seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(shmget), 2,
> > + SCMP_A0(SCMP_CMP_EQ, IPC_PRIVATE),
> > + SCMP_A2(SCMP_CMP_EQ, IP_CREAT|0777));
>
> I'm not familiar with semantics of these seccomp rules, but is this
> saying that the second arg must be exactly equal to IP_CREAT|0777 ?
Yes.
> If the app passes IP_CREAT|0600, would that be permitted instead ?
> The latter is what I see gtk2 source code passing for mode.
It wouldn't match the rule as written above, if it doesn't match any other
configured rules it would hit the default filter action.
--
paul moore
security @ redhat
next prev parent reply other threads:[~2015-09-11 18:59 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-10 1:55 [Qemu-devel] [PATCH] Add a few argument filters to the seccomp sandbox namnamc
2015-09-10 14:48 ` Daniel P. Berrange
2015-09-11 18:58 ` Paul Moore [this message]
-- strict thread matches above, loose matches on Subject: below --
2015-09-11 22:45 Namsun Ch'o
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