Linux Kernel PowerPC Refcount Leak Vulnerability in secvar

A refcount leak vulnerability has been identified in the Linux kernel's PowerPC secvar component. This issue arises in the format_show function, where the refcount is not properly managed, leading to a leak when the function returns an error. The vulnerability can be addressed by implementing a unified management of the of_node_put function to prevent the refcount leak.

Impact

The vulnerability causes a refcount leak, which can lead to memory management issues such as improper resource deallocation or memory exhaustion over time.