Re: [RFC PATCH v9 07/16] uapi|audit|ipe: add ipe auditing support

On Tue, Jan 31, 2023 at 12:11???PM Steve Grubb <sgrubb(a)redhat.com&gt; wrote: > > Hello, > > On Monday, January 30, 2023 5:57:22 PM EST Fan Wu wrote: > > From: Deven Bowers <deven.desai(a)linux.microsoft.com&gt; > > > > Users of IPE require a way to identify when and why an operation fails, > > allowing them to both respond to violations of policy and be notified > > of potentially malicious actions on their systens with respect to IPE > > itself. > > > > The new 1420 audit, AUDIT_IPE_ACCESS indicates the result of a policy > > evaulation of a resource. The other two events, AUDIT_MAC_POLICY_LOAD, > > and AUDIT_MAC_CONFIG_CHANGE represent a new policy was loaded into the > > kernel and the currently active policy changed, respectively. > > Typically when you reuse an existing record type, it is expected to maintain > the same fields in the same order. Also, it is expect that fields that are > common across diferent records have the same meaning. To aid in this, we have > a field dictionary here: > > https://github.com/linux-audit/audit-documentation/blob/main/specs/fields/ > field-dictionary.csv > > For example, dev is expected to be 2 hex numbers separated by a colon which > are the device major and minor numbers. But down a couple lines from here, we > find dev="tmpfs". But isn't that a filesystem type? What Steve said. I'll also add an administrative note, we just moved upstream Linux audit development to a new mailing list, audit(a)vger.kernel.org, please use that in future patch submissions. As a positive, it's a fully open list so you won't run into moderation delays/notifications/etc.

> > This patch also adds support for success auditing, allowing users to > > identify how a resource passed policy. It is recommended to use this > > option with caution, as it is quite noisy. > > > > This patch adds the following audit records: > > > > audit: AUDIT1420 path="/tmp/tmpwxmam366/deny/bin/hello" dev="tmpfs" > > ino=72 rule="DEFAULT op=EXECUTE action=DENY" > > Do we really need to log the whole rule? Fan, would it be reasonable to list the properties which caused the access denial? That seems like it might be more helpful than the specific rule, or am I missing something?

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