On Mon, 19.04.10 19:23, Jan Braun (janbraun at gmx.de) wrote: 1;2400;0c> Lennart Poettering schrob: > > > ...and you're explicitly disallowing cross-user shm transfer. :( > > > I guess I'll have to figure out the security implications of messing > > > with that. > > > > Well, the story goes like this: we need to make sure that a user A > > cannot trigger a SIGBUS in processes by user B simply by ftruncating an > > shm region A controls and B maps and accesses. Since handling SIGBUS > > from a library context is ugly to impossible we hence generally don't > > allow shm data transfer between users. > > Thanks for the explanation. But this is only a DoS, isn't it? Yes, it is 'just' a DoS vulnerability. Lennart -- Lennart Poettering Red Hat, Inc. lennart [at] poettering [dot] net http://0pointer.net/lennart/ GnuPG 0x1A015CC4
