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 --- 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..368763d4c24e 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);