linux-kernel - RE: [PATCH v2 vfio 1/2] vfio/pds: Always clear the save/restore FDs on reset

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Date: Wed, 28 Feb 2024 04:55:27 +0000
From: "Tian, Kevin" <kevin.tian@...el.com>
To: Brett Creeley <brett.creeley@....com>, "jgg@...pe.ca" <jgg@...pe.ca>,
	"yishaih@...dia.com" <yishaih@...dia.com>,
	"shameerali.kolothum.thodi@...wei.com"
	<shameerali.kolothum.thodi@...wei.com>, "alex.williamson@...hat.com"
	<alex.williamson@...hat.com>, "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC: "shannon.nelson@....com" <shannon.nelson@....com>,
	"stable@...r.kernel.org" <stable@...r.kernel.org>
Subject: RE: [PATCH v2 vfio 1/2] vfio/pds: Always clear the save/restore FDs
 on reset

> From: Brett Creeley <brett.creeley@....com>
> Sent: Wednesday, February 28, 2024 8:32 AM
> 
> After reset the VFIO device state will always be put in
> VFIO_DEVICE_STATE_RUNNING, but the save/restore files will only be
> cleared if the previous state was VFIO_DEVICE_STATE_ERROR. This
> can/will cause the restore/save files to be leaked if/when the
> migration state machine transitions through the states that
> re-allocates these files. Fix this by always clearing the
> restore/save files for resets.
> 
> Fixes: 7dabb1bcd177 ("vfio/pds: Add support for firmware recovery")
> Cc: stable@...r.kernel.org
> Signed-off-by: Brett Creeley <brett.creeley@....com>
> Reviewed-by: Shannon Nelson <shannon.nelson@....com>

Reviewed-by: Kevin Tian <kevin.tian@...el.com>