CVE-2025-39872

In the Linux kernel, the following vulnerability has been resolved:

hsr: hold rcu and dev lock for hsr_get_port_ndev

hsr_get_port_ndev calls hsr_for_each_port, which need to hold rcu lock.
On the other hand, before return the port device, we need to hold the
device reference to avoid UaF in the caller function.

More information : https://git.kernel.org/stable/c/68a6729afd3e8e9a2a32538642ce92b96ccf9b1d