full-disclosure - Re: The story of the Linux kernel 3.x...

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Date: Wed, 16 May 2012 22:13:48 +0200
From: Marcus Meissner <meissner@...e.de>
To: Nicolas Surribas <nicolas.surribas@...il.com>
Cc: full-disclosure@...ts.grok.org.uk
Subject: Re: The story of the Linux kernel 3.x...

On Wed, May 16, 2012 at 07:54:13PM +0200, Nicolas Surribas wrote:
> I can't reproduce with current openSUSE 12.1...
> 
> sh-4.2$ uname -rop
> 3.1.10-1.9-desktop x86_64 GNU/Linux
> sh-4.2$ lsb-release -ri
> Distributor ID: SUSE LINUX
> Release:        12.1
> sh-4.2$ cat /proc/self/maps | grep vdso
> 7fff48b58000-7fff48b59000 r-xp 00000000 00:00 0                          [vdso]
> sh-4.2$ cat /proc/self/maps | grep vdso
> 7fffabbff000-7fffabc00000 r-xp 00000000 00:00 0                          [vdso]
> sh-4.2$ cat /proc/sys/kernel/randomize_va_space
> 1

x86_64 is a bit different.

openSUSE 12.1 x86 (32bit) still uses COMPAT_VDSO, as it was never really clear
what kind of applications would break if disabled.

The next openSUSE, openSUSE 12.2, will have the 32bit VDSO randomized.

Also, randomize_va_space will be 2 (heap randomization too for PIE binaries).

Ciao, Marcus

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