From: Daniel Jacobowitz <dan@debian.org>
To: Al Viro <viro@ftp.linux.org.uk>
Cc: Sripathi Kodi <sripathik@in.ibm.com>,
Al Viro <viro@ZenIV.linux.org.uk>,
Linus Torvalds <torvalds@osdl.org>, Andrew Morton <akpm@osdl.org>,
linux-kernel@vger.kernel.org, patrics@interia.pl,
Ingo Molnar <mingo@elte.hu>, Roland McGrath <roland@redhat.com>
Subject: Re: [PATCH 2.6.13.1] Patch for invisible threads
Date: Fri, 16 Sep 2005 14:05:35 -0400 [thread overview]
Message-ID: <20050916180535.GA10430@nevyn.them.org> (raw)
In-Reply-To: <20050916074606.GE19626@ftp.linux.org.uk>
On Fri, Sep 16, 2005 at 08:46:06AM +0100, Al Viro wrote:
> > Further, about actual permission checks that we are doing, can we say: "A
> > process should be able to see /proc/<pid>/task/* of another process only if
> > they both belong to same uid or reader is root"? But any such change will
> > change the behavior of commands like 'ps', right?
>
> Right. The real question is whether the current behaviour makes any sense.
> I've no objections to your patch + modification above, but I really wonder
> if we should keep current rules in that area.
Why should there be any more restrictions on /proc/<pid>/task than
there are in /proc? Threads are not listed in the latter, but that's
strictly for performance/usability; you can enumerate threads in /proc
by just trying all the valid PIDs.
--
Daniel Jacobowitz
CodeSourcery, LLC
next prev parent reply other threads:[~2005-09-16 18:05 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-12 17:46 [PATCH 2.6.13.1] Patch for invisible threads Sripathi Kodi
2005-09-12 20:49 ` Andrew Morton
2005-09-13 13:10 ` Sripathi Kodi
2005-09-13 14:53 ` Linus Torvalds
2005-09-13 16:51 ` Al Viro
2005-09-13 17:01 ` Linus Torvalds
2005-09-13 17:12 ` Al Viro
2005-09-13 21:30 ` Sripathi Kodi
2005-09-13 21:56 ` Roland McGrath
2005-09-13 21:57 ` Al Viro
2005-09-13 23:10 ` Linus Torvalds
2005-09-14 1:47 ` Sripathi Kodi
2005-09-14 1:52 ` Al Viro
2005-09-14 14:37 ` Bill Davidsen
2005-09-15 0:30 ` Sripathi Kodi
2005-09-14 1:50 ` Al Viro
2005-09-15 0:31 ` Sripathi Kodi
2005-09-15 0:55 ` Roland McGrath
2005-09-15 1:38 ` Sripathi Kodi
2005-09-15 2:12 ` Al Viro
2005-09-15 7:29 ` Roland McGrath
2005-09-15 1:18 ` Al Viro
2005-09-16 0:54 ` Sripathi Kodi
2005-09-16 7:46 ` Al Viro
2005-09-16 15:06 ` Sripathi Kodi
2005-09-16 18:05 ` Daniel Jacobowitz [this message]
2005-09-16 18:14 ` Al Viro
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