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Sender: Ingo Molnar <mingo.kernel.org@gmail.com>
Date:   Wed, 18 Oct 2023 13:45:40 +0200
From:   Ingo Molnar <mingo@kernel.org>
To:     "H. Peter Anvin" <hpa@zytor.com>,
        Kristen Carlson Accardi <kristen@linux.intel.com>
Cc:     Hou Wenlong <houwenlong.hwl@antgroup.com>,
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        Anshuman Khandual <anshuman.khandual@arm.com>,
        Mike Rapoport <rppt@kernel.org>,
        Pasha Tatashin <pasha.tatashin@soleen.com>
Subject: Re: [PATCH RFC 1/7] x86/head/64: Mark startup_gdt and
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* H. Peter Anvin <hpa@zytor.com> wrote:

> If the goal is better KASLR, then what we really should spend time on was 
> Kristen Accardi's fgKASLR patches, which not only exponentially(!) 
> increases the randomization entrophy but also *actually* avoids the "one 
> leak and it's over" problem.

Agreed. Going by this version of function-granularity KASLR from 3 years 
ago:

  https://lwn.net/Articles/824307/
  https://lwn.net/ml/linux-kernel/20200623172327.5701-1-kristen@linux.intel.com/

The fgKASLR feature looks entirely viable to me. Back then I presumed it 
would get iterated beyond v3, and then it fell off my radar. :-/

If Kristen or someone else would like to dust this off & submit a fresh 
version it would be much appreciated!

Thanks,

	Ingo