Re: strange tclass in AVCs

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On Wed, Sep 18, 2019 at 8:53 AM Stephen Smalley <sds@xxxxxxxxxxxxx> wrote:
>
> On 9/18/19 9:35 AM, Ted Toth wrote:
> > I'm seeing things like tclass=context#012 in some AVCs what is this telling me?
>
> Just a guess here, but octal 012 is '\n' aka a newline character, and
> libselinux/src/avc.c:avc_audit() appends a "\n" at the end of the buffer
> before calling avc_log() to log the entire string.  avc_log() will call
> the logging callback, and dbusd does define one, which calls
> audit_log_user_avc_message().  Maybe audit_log_user_avc_message() is
> escaping the newline character in its output as well as appending
> additional data.
>
> I'm a little unclear though on why dbusd is checking a context contains
> permission?

These appear to only occur when systemd is starting the dbus daemon
and they end up in /var/log/messages not /var/log/audit/audit.log as
I'd expect.



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