An issue was discovered in the Linux kernel before 4.18.7. In create_qp_common in drivers/infiniband/hw/mlx5/qp.c, mlx5_ib_create_qp_resp was never initialized, resulting in a leak of stack memory to userspace.
https://security.netapp.com/advisory/ntap-20190905-0002/
https://github.com/torvalds/linux/commit/0625b4ba1a5d4703c7fb01c497bd6c156908af00
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.7
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00056.html
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00055.html