afunix: Get userns from inskb in unixdiaggetexact().
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.10.159 by commit 575a6266f63dbb3b8eb1da03671451f0d81b8034, it was introduced in version v5.3 by commit cae9910e73446cac68a54e3a7b02aaa12b689026. For more details please see the references link.