Patch "drm: crtc: integer overflow in drm_property_create_blob()" has been added to the 4.2-stable tree

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

drm: crtc: integer overflow in drm_property_create_blob()

to the 4.2-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-crtc-integer-overflow-in-drm_property_create_blob.patch
and it can be found in the queue-4.2 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Dan Carpenter <[email protected]>
Date: Thu, 29 Oct 2015 16:37:54 +0300
Subject: drm: crtc: integer overflow in drm_property_create_blob()

From: Dan Carpenter <[email protected]>

commit 9ac0934bbe52290e4e4c2a58ec41cab9b6ca8c96 upstream.

The size here comes from the user via the ioctl, it is a number between 1-u32max so the addition here could overflow on 32 bit systems.

---
 drivers/gpu/drm/drm_crtc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -4221,7 +4221,7 @@ drm_property_create_blob(struct drm_devi
 	struct drm_property_blob *blob;
 	int ret;
 
-	if (!length)
+	if (!length || length > ULONG_MAX - sizeof(struct drm_property_blob))
 		return ERR_PTR(-EINVAL);
 
 	blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL);

Patches currently in stable-queue which might be from [email protected] are

queue-4.2/drm-crtc-integer-overflow-in-drm_property_create_blob.patch