static inline void release_mc(struct kref *kref)
{
	struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);

	kfree(mc->multicast.ib);
	kfree(mc);
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.