Date: Thu, 5 Nov 2015 12:59:21 -0800 From: Kees Cook <keescook@...omium.org> To: "kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com> Cc: Solar Designer <solar@...nwall.com>, Greg KH <gregkh@...uxfoundation.org>, Ben Hutchings <ben@...adent.org.uk>, Ard Biesheuvel <ard.biesheuvel@...aro.org>, James Morris <jmorris@...ei.org> Subject: Kernel Self Protection Project I'm organizing a community of people to work on the various kernel self-protection technologies (most of which are found in PaX and Grsecurity). I'm building on the presentation I gave at Kernel Summit where I sought to convince the other upstream Linux kernel developers that security is more than fixing bugs, and that we need to bring in proactive defenses: http://lwn.net/Articles/662219/ This is especially highlighted by the Washington Post article today: http://www.washingtonpost.com/sf/business/2015/11/05/net-of-insecurity-the-kernel-of-the-argument/ Between the companies that recognize the critical nature of this work, and with Linux Foundation's Core Infrastructure Initiative happy to start funding specific work in this area, I think we can really make a dent. Let's start the work. I've built some wiki pages around my slides, where we can take notes, list examples, and coordinate: http://kernsec.org/wiki/index.php/Kernel_Self_Protection_Project For now, I'm going to focus on taking a look at the PAX_SIZE_OVERFLOW gcc plugin, which will also get us the gcc plugin infrastructure. Other people, please speak up on what you'd like to tackle. I recommend PAX_REFCOUNT, PAX_USERCOPY, and GRKERNSEC_KSTACKOVERFLOW for some non-plugin stuff to look at. Once we've got plugins, then we should look at PAX_MEMORY_STACKLEAK and PAX_CONSTIFY_PLUGIN. If you're feeling like disrupting people who depend on debugging, do GRKERNSEC_HIDESYM. If you're feeling especially bold, start on PAX_KERNEXEC and follow it up with PAX_MEMORY_UDEREF. Of course, there's plenty of other things, and tons I haven't listed in the wiki -- please add them and bring them up for discussion here. -Kees -- Kees Cook Chrome OS Security
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