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From: Ingo Molnar <mingo@kernel.org>
To: Borislav Petkov <bp@alien8.de>
Cc: Andi Kleen <ak@linux.intel.com>, x86-ml <x86@kernel.org>,
	lkml <linux-kernel@vger.kernel.org>
Subject: Re: [RFC PATCH] x86: Filter MSR writes from luserspace
Date: Wed, 27 Nov 2019 08:08:36 +0100	[thread overview]
Message-ID: <20191127070836.GA94748@gmail.com> (raw)
In-Reply-To: <20191126205351.GG31379@zn.tnic>


* Borislav Petkov <bp@alien8.de> wrote:

> On Tue, Nov 26, 2019 at 12:50:28PM -0800, Andi Kleen wrote:
> > You'll almost certainly violate Linus' golden rule of application
> > compatibility and the whole thing will be reverted in the end.

This objection is bogus, the ABI isn't broken, since this is basically a 
tweak of the default security model, by pushing questionable MSR 
modifications to a module or boot parameter. Those who know what they are 
doing can still do it.

The goal would be to make sure via a whitelist that end user distros 
won't have to set this parameter to permissive again, of course.

Thanks,

	Ingo

      reply	other threads:[~2019-11-27  7:08 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-26 11:22 [RFC PATCH] x86: Filter MSR writes from luserspace Borislav Petkov
2019-11-26 11:36 ` Borislav Petkov
2019-11-26 20:15 ` Andi Kleen
2019-11-26 20:33   ` Borislav Petkov
2019-11-26 20:50     ` Andi Kleen
2019-11-26 20:53       ` Borislav Petkov
2019-11-27  7:08         ` Ingo Molnar [this message]

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