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Message-ID: <CA+55aFx_4a245DQ-9=rW4reJ_Qa-+sZ3QG840kyVmcG8ebdEBg@mail.gmail.com>
Date: Tue, 29 Mar 2016 17:55:40 -0500
From: Linus Torvalds <torvalds@...ux-foundation.org>
To: Scott Bauer <sbauer@....utah.edu>
Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
"kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>,
"the arch/x86 maintainers" <x86@...nel.org>, Andi Kleen <ak@...ux.intel.com>,
Andy Lutomirski <luto@...capital.net>, Ingo Molnar <mingo@...hat.com>,
Thomas Gleixner <tglx@...utronix.de>, wmealing@...hat.com
Subject: Re: [PATCH v4 0/4] SROP Mitigation: Sigreturn Cookies
On Tue, Mar 29, 2016 at 5:54 PM, Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> So you could do 4 32
>
> - the random value
> - the low 32 bits of the address of the cookie
> - the low 32 bits of the return point stack and instruction pointer
Oops, editing mishap. That was supposed to be about the 128-bit md5
chunk, which uses 4 32-bit values, but then I edited things and didn't
get back to it.
Linus
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