without it, you'll find that, inside a container, /proc/1/fd/14 points to /proc/1234/status. This breaks some software, like Anbox (https://github.com/anbox/anbox/issues/1397).
/proc/1/fd/14
/proc/1234/status
https://github.com/anbox/anbox/issues/1397
This MR backports the patch and repairs Anbox.