CVE request -- Linux kernel: selinux: rate-limit unrecognized netlink message warnings in selinux_nlmsg_perm()

[Vladis Dronov <vdronov () redhat com>]

It was found that the kernel produces unlimited number of warning
messages in case certain malformed NETLINK packets are received.

A local, unprivileged user could generate such packets unlimitedly
and potentially flood the kernel and the system log with excessive
warning messages.

Upstream patch proposal:
http://article.gmane.org/gmane.linux.kernel.lsm/25958

References:
https://bugzilla.redhat.com/show_bug.cgi?id=1278005

Thanks,
Vladis