Re: [Xen-devel] race condition in xen-gntdev

[David Vrabel <david.vrabel@xxxxxxxxxx>]

On 26/06/15 02:28, Marek Marczykowski-Górecki wrote:
> 
> From b876e14888bdafa112c3265e6420543fa74aa709 Mon Sep 17 00:00:00 2001
> From: =?UTF-8?q?Marek=20Marczykowski-G=C3=B3recki?=
>  <marmarek@xxxxxxxxxxxxxxxxxxxxxx>
> Date: Fri, 26 Jun 2015 02:16:49 +0200
> Subject: [PATCH] xen/grant: fix race condition in gntdev_release
> 
> While gntdev_release is called, MMU notifier is still registered and
> can traverse priv->maps list even if no pages are mapped (which is the
> case - gntdev_release is called after all). But gntdev_release will
> clear that list, so make sure that only one of those things happens at
> the same time.

Applied to for-linus-4.2 and tagged for stable, thanks.

David

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