[3.13.y-ckt stable] Patch "drm/qxl: Do not leak memory if qxl_release_list_add fails" has been added to staging queue

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    drm/qxl: Do not leak memory if qxl_release_list_add fails

to the linux-3.13.y-queue branch of the 3.13.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.13.y-queue

This patch is scheduled to be released in version 3.13.11-ckt24.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.13.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

------

>From fcab09df26e4d6000686d895f4fc0493b2a47b17 Mon Sep 17 00:00:00 2001
From: Frediano Ziglio <fziglio at redhat.com>
Date: Wed, 3 Jun 2015 12:09:10 +0100
Subject: drm/qxl: Do not leak memory if qxl_release_list_add fails

commit 8451cc964c1d193b989c41a44e5e77109cc696f8 upstream.

If the function fails reference counter to the object is not decremented
causing leaks.
This is hard to spot as it happens only on very low memory situations.

Signed-off-by: Frediano Ziglio <fziglio at redhat.com>
Reviewed-by: Dave Airlie <airlied at redhat.com>
Signed-off-by: Dave Airlie <airlied at redhat.com>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 drivers/gpu/drm/qxl/qxl_ioctl.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/qxl/qxl_ioctl.c b/drivers/gpu/drm/qxl/qxl_ioctl.c
index 7b95c75..729debf 100644
--- a/drivers/gpu/drm/qxl/qxl_ioctl.c
+++ b/drivers/gpu/drm/qxl/qxl_ioctl.c
@@ -122,8 +122,10 @@ static struct qxl_bo *qxlhw_handle_to_bo(struct qxl_device *qdev,
 	qobj = gem_to_qxl_bo(gobj);

 	ret = qxl_release_list_add(release, qobj);
-	if (ret)
+	if (ret) {
+		drm_gem_object_unreference_unlocked(gobj);
 		return NULL;
+	}

 	return qobj;
 }
--
1.9.1