CVE request Linux kernel: filter: prevent nla extensions to peek beyond the end of the message

[P J P <ppandit () redhat com>]

   Hello,

Linux kenrel built with the BPF interpreter support in the networking core is 
vulnerable to an out of bounds buffer access flaw. It occurs when accessing a 
netlink attribute from the skb->data buffer.

An unprivileged user/program could use this flaw to crash the system kernel 
resulting in DoS.

Upstream fix:
-------------
  -> https://git.kernel.org/linus/05ab8f2647e4221cbdb3856dd7d32bd5407316b3

Introduced by:
--------------
  -> https://git.kernel.org/linus/4738c1db1593687713869fa69e733eebc7b0d6d8
  -> https://git.kernel.org/linus/d214c7537bbf2f247991fb65b3420b0b3d712c67

Thank you.
--
Prasad J Pandit / Red Hat Security Response Team