Date: Tue, 28 May 2002 16:49:17 -0700 (PDT) From: Archie Cobbs <archie@dellroad.org> To: freebsd-arch@freebsd.org Subject: Kernel stack overflow detection? Message-ID: <200205282349.g4SNnHu88712@arch20m.dellroad.org>
next in thread | raw e-mail | index | archive | help
Hi, Got a question and a proposal... I'm trying to track down a mysterious bug and one possible theory is a kernel stack overflow (I've bloated the kernel with a bunch of custom code). This is in FreeBSD-stable. The question is: does INVARIANTS do anything to detect this? If not, what would be the "expected" behavior of such a bug? If INVARIANTS doesn't do so already, I'd like to propose to write up an INVARIANTS check that would validate that the kernel stack has not overflowed. However I'm curious if anyone has done this already and/or what the right way to go about it would be. E.g, add an extra stack page with read-only protection? Any hints appreciated. Thanks, -Archie __________________________________________________________________________ Archie Cobbs * Packet Design * http://www.packetdesign.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200205282349.g4SNnHu88712>