On Wed, 29 Oct 2014, Andy Lutomirski wrote: > If an attacker can cause a controlled kernel stack overflow, > overwriting the restart block is a very juicy exploit target. > Moving the restart block to struct task_struct prevents this > exploit. > > Note that there are other fields in thread_info that are also easy > targets, at least on some architectures. > > It's also a decent simplification, since the restart code is more or > less identical on all architectures. I think that's the most important change. Moving common stuff into common code. The side effect of slightly reducing the attack surface is nice, but as Al pointed out not really the big win here. Thanks, tglx -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
