Possible typo in 22-ignore-chrony.rules
Steve Grubb
sgrubb at redhat.com
Mon Jan 18 13:45:13 UTC 2021
On Sunday, January 17, 2021 11:42:38 PM EST Joe Wulf wrote:
> This snippit in both rules in that file (for both v2.8.5 and v3.0.0) "-F
> auid=unset -Fuid=chrony" for the second "-F" seems to be missing a space
> after the "-F". Correct?
Yeah, it looks that way. Fixed. Thanks!
> IRT to the comment in this rule file, "These
> rules suppress the time-change event when chrony does time updates"; does
> that mean IF these two rules were not included or commented-out, that the
> chrony time updates would 'log' events in the audit log?
Yes.
> How do these rules 'work' to suppress chrony time updates from being
> logged?
The audit rules is a first match wins system. These rules are in a file with a
22 in the name which preceeds rules whose file name starts with 30. In 30-
stig.rules, we have a rule that asks for any use of adjtimex to be logged
which is the syscall chrony uses to update time. Since the rule in 22 has a
never action and it preceeds the one from the stig, it matches first and takes
the never action which is not to log it.
-Steve
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