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Message-ID: <20170605200652.GB87699@gmail.com>
Date: Mon, 5 Jun 2017 13:06:52 -0700
From: Eric Biggers <ebiggers3@...il.com>
To: Kees Cook <keescook@...omium.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
LKML <linux-kernel@...r.kernel.org>,
"# 3.4.x" <stable@...r.kernel.org>,
Philip Müller <philm@...jaro.org>,
Daniel Micay <danielmicay@...il.com>,
Arjan van de Ven <arjan@...ux.intel.com>,
Rik van Riel <riel@...hat.com>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Peter Zijlstra <peterz@...radead.org>,
Thomas Gleixner <tglx@...utronix.de>,
"kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>,
Ingo Molnar <mingo@...nel.org>
Subject: Re: Re: [PATCH 3.18 01/33] Revert
"stackprotector: Increase the per-task stack canarys random range from 32
bits to 64 bits on 64-bit platforms"
On Mon, Jun 05, 2017 at 12:13:11PM -0700, Kees Cook wrote:
> On Mon, Jun 5, 2017 at 9:16 AM, Greg Kroah-Hartman
> <gregkh@...uxfoundation.org> wrote:
> > 3.18-stable review patch. If anyone has any objections, please let me know.
> >
> > ------------------
> >
> > From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> >
> > This reverts commit 609a3e81550b0b4ea87197b0f59455a7bcff975a which is
> > commit 5ea30e4e58040cfd6434c2f33dc3ea76e2c15b05 upstream.
> >
> > It shouldn't have been backported to 3.18, as we do not have
> > get_random_long() in that kernel tree.
>
> It should be possible to trivially backport
> ec9ee4acd97c0039a61c0ae4f12705767ae62153 to gain get_random_long().
>
> -Kees
If that's done it may be a good idea to take
b1132deac01c2332d234fa821a70022796b79182 as well, which fixed an alignment bug
in get_random_long().
Eric
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