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Subject: Re: [PATCH] selinux: add tracepoint on denials
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From:   Stephen Smalley <stephen.smalley.work@gmail.com>
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Date:   Tue, 28 Jul 2020 09:04:41 -0400
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On 7/28/20 8:49 AM, Thiébaud Weksteen 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
> 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.

Ok, also please use unsigned int for the fields and %u for the cls value.

(btw top-posting is discouraged for mailing list discussions, see 
http://vger.kernel.org/lkml/#s3-9)