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From: Steven Rostedt <rostedt@goodmis.org>
To: "Thiébaud Weksteen" <tweek@google.com>
Cc: Paul Moore <paul@paul-moore.com>,
	Stephen Smalley <stephen.smalley.work@gmail.com>,
	Nick Kralevich <nnk@google.com>,
	Joel Fernandes <joelaf@google.com>,
	Eric Paris <eparis@parisplace.org>,
	Ingo Molnar <mingo@redhat.com>,
	Mauro Carvalho Chehab <mchehab+huawei@kernel.org>,
	"David S. Miller" <davem@davemloft.net>,
	Rob Herring <robh@kernel.org>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	SElinux list <selinux@vger.kernel.org>
Subject: Re: [PATCH] selinux: add tracepoint on denials
Date: Tue, 28 Jul 2020 09:12:20 -0400	[thread overview]
Message-ID: <20200728091220.5769b606@oasis.local.home> (raw)
In-Reply-To: <CA+zpnLfczC=9HQA8s1oBGKGQO+OkuydF85o89dhSxdOyKBHMgg@mail.gmail.com>

On Tue, 28 Jul 2020 14:49:24 +0200
Thiébaud Weksteen <tweek@google.com> wrote:

> Thanks for the review! I'll send a new revision of the patch with the
> %x formatter and using the TP_CONDITION macro.
> 
> On adding further information to the trace event, I would prefer
> adding the strict minimum to be able to correlate the event with the
> avc message. The reason is that tracevents have a fixed size (see
> https://www.kernel.org/doc/Documentation/trace/events.txt). For

Wait! What?

Where in that document does it say that trace events have a fixed size.
We have a lot of dynamically sized trace events.

> instance, we would need to decide on a maximum size for the string
> representation of the list of permissions. This would also duplicate
> the reporting done in the avc audit event. I'll simply add the pid as
> part of the printk, which should be sufficient for the correlation.
> 

Please take a look at samples/trace_events/trace_events_sample.h

and read the example on __print_symbolic().

I think that's what you are looking for.

-- Steve

  parent reply	other threads:[~2020-07-28 13:12 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-24  9:15 [PATCH] selinux: add tracepoint on denials Thiébaud Weksteen
2020-07-24 13:32 ` Stephen Smalley
2020-07-24 13:54   ` Paul Moore
2020-07-28 12:49     ` Thiébaud Weksteen
2020-07-28 13:04       ` Stephen Smalley
2020-07-28 13:19         ` Thiébaud Weksteen
2020-07-28 13:12       ` Steven Rostedt [this message]
2020-07-28 13:23         ` Thiébaud Weksteen
2020-07-28 15:12       ` Paul Moore
2020-07-28 16:02         ` Thiébaud Weksteen
2020-07-28 16:19           ` Stephen Smalley
2020-07-28 16:20           ` Paul Moore
2020-07-30 15:50             ` Thiébaud Weksteen
2020-07-30  8:03           ` peter enderborg
2020-07-24 13:52 ` Steven Rostedt
2020-07-30 14:29   ` [PATCH] RFC: selinux avc trace peter enderborg
2020-07-30 14:50     ` Stephen Smalley
2020-07-30 15:47       ` peter enderborg
2020-07-30 15:04     ` Steven Rostedt
2020-07-30 15:31       ` peter enderborg
2020-07-30 16:02         ` Steven Rostedt
2020-07-30 17:05           ` peter enderborg
2020-07-30 17:16             ` Steven Rostedt
2020-07-30 19:12               ` peter enderborg
2020-07-30 19:29                 ` Steven Rostedt
2020-07-30 19:50                   ` peter enderborg
2020-07-31 11:07     ` Thiébaud Weksteen
2020-07-28 15:22 ` [PATCH] selinux: add tracepoint on denials Joel Fernandes

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