[PATCH 0/1][T/B] CVE-2018-14734 - Denial of Service in Infiniband core

[Tyler Hicks]

https://people.canonical.com/~ubuntu-security/cve/?cve=CVE-2018-14734

 drivers/infiniband/core/ucma.c in the Linux kernel through 4.17.11 allows
 ucma_leave_multicast to access a certain data structure after a cleanup
 step in ucma_process_join, which allows attackers to cause a denial of
 service (use-after-free).

Clean cherry pick to Bionic and Trusty. Xenial has already been fixed thanks to
the fix coming in via linux-stable. I was unable to test the affected code due
to lack of necessary hardware. However, the build logs are clean and the fix is
easy to review.

Tyler