From: Joel Fernandes <joel@joelfernandes.org>
To: Casey Schaufler <casey@schaufler-ca.com>
Cc: James Morris <jmorris@namei.org>,
linux-kernel@vger.kernel.org,
Peter Zijlstra <peterz@infradead.org>,
rostedt@goodmis.org, primiano@google.com, rsavitski@google.com,
jeffv@google.com, kernel-team@android.com,
Alexei Starovoitov <ast@kernel.org>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
bpf@vger.kernel.org, Daniel Borkmann <daniel@iogearbox.net>,
Ingo Molnar <mingo@redhat.com>, Jiri Olsa <jolsa@redhat.com>,
Kees Cook <keescook@chromium.org>,
linux-security-module@vger.kernel.org,
Matthew Garrett <matthewgarrett@google.com>,
Namhyung Kim <namhyung@kernel.org>,
selinux@vger.kernel.org, Song Liu <songliubraving@fb.com>,
"maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)"
<x86@kernel.org>, Yonghong Song <yhs@fb.com>
Subject: Re: [PATCH RFC] perf_event: Add support for LSM and SELinux checks
Date: Wed, 9 Oct 2019 20:40:23 -0400 [thread overview]
Message-ID: <20191010004023.GC96813@google.com> (raw)
In-Reply-To: <2b94802d-12ea-4f2d-bb65-eda3b3542bb2@schaufler-ca.com>
On Wed, Oct 09, 2019 at 03:41:56PM -0700, Casey Schaufler wrote:
> On 10/9/2019 3:14 PM, James Morris wrote:
> > On Wed, 9 Oct 2019, Casey Schaufler wrote:
> >
> >> Please consider making the perf_alloc security blob maintained
> >> by the infrastructure rather than the individual modules. This
> >> will save it having to be changed later.
> > Is anyone planning on using this with full stacking?
> >
> > If not, we don't need the extra code & complexity. Stacking should only
> > cover what's concretely required by in-tree users.
>
> I don't believe it's any simpler for SELinux to do the allocation
> than for the infrastructure to do it. I don't see anyone's head
> exploding over the existing infrastructure allocation of blobs.
> We're likely to want it at some point, so why not avoid the hassle
> and delay by doing it the "new" way up front?
>
I don't see how it can be maintained by the users (assuming you meant
infrastructure as perf_event subsystem). The blob contains a SID which as far
as I know, is specific to SELinux. Do you have an in-tree example of this?
Further, this is also exactly it is done for BPF objects which I used as a
reference.
thanks,
- Joel
next prev parent reply other threads:[~2019-10-10 0:40 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-09 20:36 [PATCH RFC] perf_event: Add support for LSM and SELinux checks Joel Fernandes (Google)
2019-10-09 21:55 ` Casey Schaufler
2019-10-09 22:14 ` James Morris
2019-10-09 22:41 ` Casey Schaufler
2019-10-10 0:40 ` Joel Fernandes [this message]
2019-10-10 0:53 ` Casey Schaufler
2019-10-10 2:44 ` James Morris
2019-10-10 18:12 ` Casey Schaufler
2019-10-10 19:41 ` James Morris
2019-10-09 22:11 ` James Morris
2019-10-10 0:43 ` Joel Fernandes
2019-10-10 7:23 ` Alexey Budankov
2019-10-10 8:12 ` Peter Zijlstra
2019-10-10 15:13 ` Joel Fernandes
2019-10-10 17:09 ` Peter Zijlstra
2019-10-10 18:31 ` Joel Fernandes
2019-10-11 7:05 ` Peter Zijlstra
2019-10-11 15:47 ` Joel Fernandes
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