Re: [added to the 3.18 stable tree] xen/gntdevt: Fix race condition in gntdev_release()
From: David Vrabel <hidden>
Date: 2015-08-27 17:21:49
On 27/08/15 18:15, Marek Marczykowski-Górecki wrote:
On Thu, Aug 27, 2015 at 11:37:44AM -0400, Sasha Levin wrote:quoted
From: Marek Marczykowski-Górecki <redacted> This patch has been added to the 3.18 stable tree. If you have any objections, please let us know.On 3.18 it should be spin_lock, not mutex_lock. Modified patch here: https://raw.githubusercontent.com/QubesOS/qubes-linux-kernel/stable-3.18/patches.xen/0001-xen-grant-fix-race-condition-in-gntdev_release.patch
No. Because this results in a sleep while holding the spin lock (in free_xenballooned_pages()). 1401c00e59ea021c575f74612fe2dbba36d6a4ee (xen/gntdev: convert priv->lock to a mutex) is a prerequisite. David