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Date: Sat, 30 Jul 2011 22:20:02 +0400
From: Vasiliy Kulikov <segoon@...nwall.com>
To: kernel-hardening@...ts.openwall.com
Subject: BINFMT_ELF_AOUT (was: -ow features)
Solar,
On Sat, Jul 30, 2011 at 02:42 +0400, Solar Designer wrote:
> > like STRICT_DEVMEM?
>
> I'm not sure why you mention this one as an example.
Because it guards some doubtful feature, which is considered harmful for
the generic system.
> I think the
> CONFIG_BINFMT_ELF_AOUT name may be used, and this option will thus look
> (and work) similar to other CONFIG_BINFMT_* options.
>
> > Looks like a good plan - kernel developers don't
> > like to support legacy stuff. If it is moved to a config option, then
> > in some years it could be even fully removed (if I understand the AOUT
> > significance).
>
> Right. This stuff has been obsolete for 15+ years, at least for native
> Linux binaries.
Looks like it was almost fully removed in 2.6.25:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=d20894a23708c2af75966534f8e4dedb46d48db2
The only untouched part is load_elf_library(). I think I can simply
remove it in the proposed patch as full a.out removal from ELF format
was scheduled in 2.6.25.
Thanks,
--
Vasiliy
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