From mboxrd@z Thu Jan 1 00:00:00 1970 From: "H. Peter Anvin" Subject: Re: Horrible denial of service bug in autmount 5 Date: Fri, 20 Jun 2008 21:54:02 -0700 Message-ID: <485C896A.6050701@zytor.com> References: <8332BEF1-7FA5-434F-B444-9F8820A61B83@cam.ac.uk> <1213969464.2971.107.camel@raven.themaw.net> <5A1DEB9E-FD94-455E-AB89-05D9E74084B5@cam.ac.uk> <1213974299.4975.15.camel@raven.themaw.net> <095037D1-F2F1-4A08-A6D2-841C22D8BC5C@cam.ac.uk> <1213975734.4975.17.camel@raven.themaw.net> <485BE2E6.9080509@zytor.com> <1213986137.4975.39.camel@raven.themaw.net> <485BFF00.7020205@zytor.com> <1214016215.4975.50.camel@raven.themaw.net> <485C834C.6010507@zytor.com> <1214023459.4975.90.camel@raven.themaw.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1214023459.4975.90.camel@raven.themaw.net> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: autofs-bounces@linux.kernel.org Errors-To: autofs-bounces@linux.kernel.org To: Ian Kent Cc: autofs@linux.kernel.org, Anton Altaparmakov , Unix Support Ian Kent wrote: > > True and I very nearly wrote back and said that but then I started to > remember the painful issues of SIGKILL and trying to work out if the > flag file is really valid and the issues of mount(8) using a lock file > with flock() and stopped myself. > I think the issues with mount(8) had to do with backwards compatibility; after all, it's one of the very first Linux utilities at all. > But, yes, I could do that. > > To support multiple instances I will need to check in a few places that > I don't interfere with other process mounts. I suspect the Cambridge > guys have either been lucky so far and possibly not properly > investigated the issue. They don't seem to want to discuss it either so > I fear their in for an unpleasant surprise at some point. Yeah, that's another ball of wax entirely. -hpa