linux-kernel - Re: + proc-connector-add-event-for-process-becoming-session-leader.patch added to -mm tree

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1245833631.3280.0.camel@wing-commander>
Date:	Wed, 24 Jun 2009 09:53:51 +0100
From:	Scott James Remnant <scott@...ntu.com>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Matt Helsley <matthltc@...ibm.com>,
	linux-kernel@...r.kernel.org
Subject: Re: +
 proc-connector-add-event-for-process-becoming-session-leader.patch added to
 -mm tree

On Tue, 2009-06-23 at 22:29 +0200, Oleg Nesterov wrote:

> > The act of a process becoming a session leader is a useful signal to a
> > supervising init daemon such as Upstart.
> ...
> > @@ -360,8 +360,10 @@ void __set_special_pids(struct pid *pid)
> >  {
> >  	struct task_struct *curr = current->group_leader;
> >
> > -	if (task_session(curr) != pid)
> > +	if (task_session(curr) != pid) {
> >  		change_pid(curr, PIDTYPE_SID, pid);
> > +		proc_sid_connector(curr);
> > +	}
> 
> Wouldn't it better to change sys_setsid() then? This looks more clear
> imho, and we can move proc_sid_connector() outside of tasklist_lock.
> 
> Note also that __set_special_pids() does not neccessary mean we are
> becoming a session leader, see daemonize().
> 
Actually, I specifically wanted to receive this event if the process
called daemonize() which is why this is done here rather than in
sys_setsid()

The new session is important information to init in figuring out what
the process is up to (ie, fork(), setsid(), fork() = daemonise)

Scott
-- 
Scott James Remnant
scott@...ntu.com

Download attachment "signature.asc" of type "application/pgp-signature" (198 bytes)