linux-kernel - Re: [PATCH] powerpc/mm: remove hack in mmap randomize layout

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Message-Id: <20111017.185357.1185691091043314919.davem@davemloft.net>
Date:	Mon, 17 Oct 2011 18:53:57 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	dpmcgee@...il.com
Cc:	linuxppc-dev@...ts.ozlabs.org, benh@...nel.crashing.org,
	paulus@...ba.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] powerpc/mm: remove hack in mmap randomize layout

From: Dan McGee <dpmcgee@...il.com>
Date: Mon, 17 Oct 2011 17:43:11 -0500

> Aha, I wasn't aware this was also being done elsewhere as there was no
> comment to tip me off. I found the one in
> arch/sparc/kernel/sys_sparc_64.c (mmap_rnd) and have fixed that
> locally and will resend, but I'm not seeing get_random_int() in use
> anywhere else in that architecture so I'm not quite sure where your
> second mentioned location is- or did you just mean the two calls 2
> lines apart in mmap_rnd()?

My bad, I thought we had implemented address randomization on 32-bit
sparc as well, unfortunately we haven't even though sparc64 has it
for 32-bit compat tasks.

That should be fixed at some point, but is outside of the scope of
what you're doing.

Thanks!
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