Linux Kernel Refcount Leak Vulnerability in ARM Meson SMP Preparation Function

A refcount leak vulnerability has been identified in the Linux kernel's ARM architecture, specifically within the Meson subsystem. The issue arises in the 'meson_smp_prepare_cpusof_find_compatible_node()' function, which returns a node pointer with an incremented reference count. The vulnerability occurs because the function does not properly decrement the reference count before returning, leading to a memory leak. The missing 'of_node_put()' call needs to be added to prevent this refcount leak.

Impact

Exploitation of this vulnerability leads to a memory refcount leak, which can potentially be exploited to cause a use-after-free condition.