Add check for the return value of kstrdup_const() in drm_managed.c
to prevent potential null pointer dereference.

Fixes: c6603c740e0e ("drm: add managed resources tied to drm_device")
Cc: stable@vger.kernel.org
Signed-off-by: Haoxiang Li <haoxiang_li2024@163.com>
---
Changes in v2:
- Modify a fix error. Thanks, Dmitry!
---
 drivers/gpu/drm/drm_managed.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/drm_managed.c b/drivers/gpu/drm/drm_managed.c
index cc4c463daae7..e34b8dcde48c 100644
--- a/drivers/gpu/drm/drm_managed.c
+++ b/drivers/gpu/drm/drm_managed.c
@@ -151,6 +151,11 @@ int __drmm_add_action(struct drm_device *dev,
 	}
 
 	dr->node.name = kstrdup_const(name, GFP_KERNEL);
+	if (!dr->node.name) {
+		kfree(dr);
+		return -ENOMEM;
+	}
+
 	if (data) {
 		void_ptr = (void **)&dr->data;
 		*void_ptr = data;
@@ -236,6 +241,10 @@ void *drmm_kmalloc(struct drm_device *dev, size_t size, gfp_t gfp)
 		return NULL;
 	}
 	dr->node.name = kstrdup_const("kmalloc", gfp);
+	if (!dr->node.name) {
+		kfree(dr);
+		return NULL;
+	}

 	add_dr(dev, dr);
 
-- 
2.25.1

On Mon, Aug 04, 2025 at 10:20:21AM +0800, Haoxiang Li wrote:
> Add check for the return value of kstrdup_const() in drm_managed.c
> to prevent potential null pointer dereference.
> 
> Fixes: c6603c740e0e ("drm: add managed resources tied to drm_device")
> Cc: stable@vger.kernel.org
> Signed-off-by: Haoxiang Li <haoxiang_li2024@163.com>
> ---
> Changes in v2:
> - Modify a fix error. Thanks, Dmitry!
> ---
>  drivers/gpu/drm/drm_managed.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>


-- 
With best wishes
Dmitry