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From: Andrew Morton <akpm@linux-foundation.org>
To: Rafael Aquini <aquini@redhat.com>
Cc: linux-kernel@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
	Heiko Carstens <hca@linux.ibm.com>,
	Petr Mladek <pmladek@suse.com>, Mike Rapoport <rppt@kernel.org>,
	Paul McKenney <paulmck@kernel.org>,
	Samuel Holland <samuel.holland@sifive.com>
Subject: Re: [PATCH v2] mm: mmap: allow for the maximum number of bits for randomizing mmap_base by default
Date: Tue, 11 Jun 2024 19:43:12 -0700	[thread overview]
Message-ID: <20240611194312.6048eba27c9ff3869040a35c@linux-foundation.org> (raw)
In-Reply-To: <Zmj7XAF5EcF40glG@x1-fbsd.aquini.net>

On Tue, 11 Jun 2024 21:35:24 -0400 Rafael Aquini <aquini@redhat.com> wrote:

> > Shouldn't we make this the default (at least for 32-bit) so the
> > regressed kernels are fixed simply by applying this patch?
> > 
> 
> That is a fair take, indeed. I guess we could do something like
> 
>  config FORCE_MAX_MMAP_RND_BITS
>         bool "Force maximum number of bits to use for ASLR of mmap base address"
> -       default n
> +       default y if !64BIT

"something like" != "exhaustively tested" ;)

I'll toss that in there, but please do let me know when it is suitable
for an upstream merge.

I also added cc:stable.

  reply	other threads:[~2024-06-12  2:43 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-06-06 17:00 [PATCH] " Rafael Aquini
2024-06-06 18:06 ` [PATCH v2] " Rafael Aquini
2024-06-10 18:11   ` Andrew Morton
2024-06-10 18:45     ` Rafael Aquini
2024-06-11 21:32       ` Andrew Morton
2024-06-12  1:35         ` Rafael Aquini
2024-06-12  2:43           ` Andrew Morton [this message]
2024-06-12 12:26             ` Rafael Aquini

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