Linux Kernel Pinctrl Nomadik Refcount Leak Vulnerability

A refcount leak vulnerability has been identified in the Linux kernel's pinctrl subsystem for Nomadik processors. The issue arises in the function 'nmk_pinctrl_dt_subnode_to_mapof_parse_phandle()', which returns a node pointer with an incremented reference count. The vulnerability occurs because the function fails to release the reference when the node is no longer needed, leading to a memory leak.

Impact

Exploitation of this vulnerability causes a memory refcount leak, which can lead to memory management issues.