AZL-77781

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

rocker: fix memory leak in rockerworldportpostfini()

In rockerworldportpreinit(), rockerport->wpriv is allocated with kzalloc(wops->portprivsize, GFPKERNEL). However, in rockerworldportpostfini(), the memory is only freed when wops->portpostfini callback is set:

if (!wops->port_post_fini)
    return;
wops->port_post_fini(rocker_port);
kfree(rocker_port->wpriv);

Since rockerofdpaops does not implement portpostfini callback (it is NULL), the wpriv memory allocated for each port is never freed when ports are removed. This leads to a memory leak of sizeof(struct ofdpa_port) bytes per port on every device removal.

Fix this by always calling kfree(rockerport->wpriv) regardless of whether the portpost_fini callback exists.