From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <5b42f3047db318b115c3e3bbb237a45e@terzarima.net> From: Charles Forsyth Date: Sun, 19 Apr 2009 00:31:40 +0100 To: 9fans@9fans.net In-Reply-To: <13426df10904181037k6b5b71dawe13a5ca1e08a8cd0@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Subject: Re: [9fans] Plan9 - the next 20 years Topicbox-Message-UUID: e7d99abc-ead4-11e9-9d60-3106f5b1d025 this discussion of checkpoint/restart reminds me of a hint i was given years ago: if you wanted to break into a system, attack through the checkpoint/restart system. i won a jug of beer for my subsequent successful attack which involved patching the disc offset for an open file in a copy of the Slave Service Area saved by the checkpoint; with the offset patched to zero, the newly restored process could read the file and dump the users and passwords conveniently stored in the clear at the start of the system area of the system disc. the hard bit was writing the code to dump the data in a tidy way.