Re: Is zero a valid value for the pid member of the AUDIT_SIGNAL_INFO message?

On 14/03/12, Eric Paris wrote: > On Wed, 2014-03-12 at 08:22 -0400, Steve Grubb wrote: > > On Tuesday, March 11, 2014 06:15:17 PM Richard Guy Briggs wrote: > > > Is zero a valid value for the pid member of the AUDIT_SIGNAL_INFO message? > > > > Well, pid=0 would be the kernel. So, its valid but unlikely. > > Actually, signals from the kernel will never get recorded here... > > > Offhand I don't > > know why the kernel might try sending a signal. Is this a problem? > > He's trying to figure out how to store this info in light of pid > namespaces. right now, auditd can only live in the initial pid > namespace, so can only get signals from processes in the initial pid > namespace, so we can store it as a number always in the initial pid > namespace. But if auditd were ever to not be in the initial pid > namespace, not sure what to do.... Nice word column alignment above there Eric... ;-) I would be inclined to always store it in the initial pid namespace and then make a decision if it translates sanely when needed to the auditd namespace(s).