linux-kernel - Re: Stable linux-5.10.x regression triggered by MDS mitigation

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Message-ID: <2024070152-unpaired-trouble-2632@gregkh>
Date: Mon, 1 Jul 2024 14:27:04 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: Jari Ruusu <jariruusu@...tonmail.com>
Cc: Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: Stable linux-5.10.x regression triggered by MDS mitigation

On Wed, Jun 26, 2024 at 01:02:35PM +0000, Jari Ruusu wrote:
> On Tuesday, June 25th, 2024 at 21:01, Pawan Gupta <pawan.kumar.gupta@...ux.intel.com> wrote:
> > Thanks for pointing this out, CLEAR_CPU_BUFFERS should happen before POPFL.
> > Below patch moves it before POPFL and also adds a safer version that
> > switches to KERNEL_DS before executing VERW. This should ensure VERW works
> > in all cases:
> 
> Your patch looks OK to me. Thanks.
> Tested on linux-5.10.220 inside 32-bit VM.

Great!  Hopefully someone submits this to the stable tree so we can
accept it...