From: Oleg Nesterov <oleg@xxxxxxxxxx> Date: Tue, 15 Apr 2014 20:07:00 +0200 > On 04/15, David Miller wrote: >> >> From: Oleg Nesterov <oleg@xxxxxxxxxx> >> Date: Tue, 15 Apr 2014 19:49:00 +0200 >> >> > We do not want to write to, say, page cache if the probed application >> > mmaps a file at the same vaddr. >> >> If user has write access to that page... not our problem. > > Well, I am not sure. > > Yes, this won't allow you to write the exploit. But if this actually > happens because an application is buggy, this can lead to really > hard-to-debug problems. And this is different from a stray userland scribble onto such a page how? This is all so much simpler if you don't insist on doing all of this hand-holding for the user, that's not the kernel's job. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/linux-arm-kernel