linux-kernel - Re: [BUG/PATCH] kernel RNG and its secrets

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Message-ID: <5527E411.3090806@iogearbox.net>
Date:	Fri, 10 Apr 2015 16:54:09 +0200
From:	Daniel Borkmann <daniel@...earbox.net>
To:	Stephan Mueller <smueller@...onox.de>
CC:	Hannes Frederic Sowa <hannes@...essinduktion.org>,
	mancha <mancha1@...o.com>, tytso@....edu,
	linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org,
	herbert@...dor.apana.org.au, dborkman@...hat.com
Subject: Re: [BUG/PATCH] kernel RNG and its secrets

On 04/10/2015 04:50 PM, Stephan Mueller wrote:
> Am Freitag, 10. April 2015, 16:46:04 schrieb Daniel Borkmann:
>
> Hi Daniel,
>
>> On 04/10/2015 04:36 PM, Stephan Mueller wrote:
>>> Am Freitag, 10. April 2015, 16:26:00 schrieb Hannes Frederic Sowa:
>> ...
>>
>>>> I suspected a problem in how volatile with non-present output args could
>>>> be different, but this seems not to be the case.
>>>>
>>>> I would contact llvm/clang mailing list and ask. Maybe there is a
>>>> problem? It seems kind of strange to me...
>>
>> +1
>>
>>> Do you really think this is a compiler issue?
>>
>> If clang/LLVM advertises "GCC compatibility", then this would
>> certainly be a different behavior.
>
> As you wish. I will contact the clang folks. As the proposed fix is not super
> urgend, I think we can leave it until I got word from clang.

Okay, that would be good, please let us know.

I believe there's certainly effort in the direction of an official
kernel clang/LLVM support, but not officially supported yet. If we
could get some clarification on the issue, even better.
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