Linux Kernel Refcount Leak Vulnerability in DRM MSM MDP4

A refcount leak vulnerability has been identified in the Linux kernel's DRM MSM MDP4 component. The issue arises in the 'mdp4_modeset_init_infof_graph_get_remote_node()' function, which returns a pointer to a remote device node with an incremented reference count. Failure to properly decrement this reference count when the node is no longer needed leads to a memory leak. The vulnerability has been addressed by adding the missing 'of_node_put()' call to prevent the refcount leak.

Impact

Exploitation of this vulnerability could lead to a memory leak, causing increased memory usage and potential degradation of system performance.