linux-kernel - Re: [GIT PULL] x86/kaslr for v3.14

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20140121140311.GB4537@gmail.com>
Date:	Tue, 21 Jan 2014 15:03:11 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Cong Ding <dinggnu@...il.com>,
	"H. Peter Anvin" <hpa@...ux.intel.com>,
	Ingo Molnar <mingo@...e.hu>, Kees Cook <keescook@...omium.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Mathias Krause <minipli@...glemail.com>,
	Michael Davidson <md@...gle.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
Subject: Re: [GIT PULL] x86/kaslr for v3.14


* H. Peter Anvin <hpa@...or.com> wrote:

> On 01/21/2014 02:27 AM, Ingo Molnar wrote:
> > 
> > Hm, live annotation of the kernel image is a relatively new perf 
> > feature, and KASLR predated that (by years) - which would at least in 
> > part explain why it went unnoticed. (Although it does not excuse the 
> > lack of testing.)
> 
> kASLR is new, but on 32 bits we have relocated the kernel for a long 
> time. [...]

I doubt many people develop on 32-bit x86, and the group of people 
looking at annotated 32-bit assembly kernel profiles ought to be 
another order of magnitude smaller than that ...

> [...]  kASLR is the first use case of relocating the 64-bit kernel, 
> though.

Yeah.

Thanks,

	Ingo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/