[PATCH 1/1][SRU][B/C/D] CVE-2018-14625 - AF_VSOCK info leak

[Tyler Hicks]

https://people.canonical.com/~ubuntu-security/cve/2018/CVE-2018-14625.html

 A flaw was found in the Linux Kernel where an attacker may be able to have
 an uncontrolled read to kernel-memory from within a vm guest. A race
 condition between connect() and close() function may allow an attacker
 using the AF_VSOCK protocol to gather a 4 byte information leak or possibly
 intercept or corrupt AF_VSOCK messages destined to other clients.

This is a clean cherry pick to Bionic, Cosmic, and Disco/4.19. The
unstable/4.20 tree already has the fix applied.

Tyler