Patch "drm/nouveau: hold mutex when calling nouveau_abi16_fini()" has been added to the 4.1-stable tree

Patch "drm/nouveau: hold mutex when calling nouveau_abi16_fini()" has been added to the 4.1-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    drm/nouveau: hold mutex when calling nouveau_abi16_fini()

to the 4.1-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-nouveau-hold-mutex-when-calling-nouveau_abi16_fini.patch
and it can be found in the queue-4.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From ac8c79304280da6ef05c348a9da03ab04898b994 Mon Sep 17 00:00:00 2001
From: Kamil Dudka <kdudka@redhat.com>
Date: Wed, 15 Jul 2015 17:18:15 +0200
Subject: drm/nouveau: hold mutex when calling nouveau_abi16_fini()

From: Kamil Dudka <kdudka@redhat.com>

commit ac8c79304280da6ef05c348a9da03ab04898b994 upstream.

This was the only access to cli->abi16 without holding the mutex.

Signed-off-by: Kamil Dudka <kdudka@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/nouveau/nouveau_drm.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/gpu/drm/nouveau/nouveau_drm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
@@ -863,8 +863,10 @@ nouveau_drm_preclose(struct drm_device *
 
 	pm_runtime_get_sync(dev->dev);
 
+	mutex_lock(&cli->mutex);
 	if (cli->abi16)
 		nouveau_abi16_fini(cli->abi16);
+	mutex_unlock(&cli->mutex);
 
 	mutex_lock(&drm->client.mutex);
 	list_del(&cli->head);


Patches currently in stable-queue which might be from kdudka@redhat.com are

queue-4.1/drm-nouveau-drm-nv04-nv40-instmem-protect-access-to-priv-heap-by-mutex.patch
queue-4.1/drm-nouveau-hold-mutex-when-calling-nouveau_abi16_fini.patch