Merge tag 'drm-misc-fixes-2020-09-24' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

drm-misc-fixes for v5.9:
- Single null pointer deref fix for dma-buf.
Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/4106c21e-f52c-4c05-6cdb-daa743bb8617@linux.intel.com

drivers/dma-buf/dma-buf.c

@@ -59,6 +59,8 @@ static void dma_buf_release(struct dentry *dentry)
 	struct dma_buf *dmabuf;
 
 	dmabuf = dentry->d_fsdata;
+	if (unlikely(!dmabuf))
+		return;
 
 	BUG_ON(dmabuf->vmapping_counter);