Yama is a LSM which restricts debugging. This prevents processes from
snooping on another. It can be easily disabled with sysctl.
This was initially included in #14392 and disabled by default by
86721a5f78.
This has been part of the hardened configuration, but many other distros
ship this for quite some time (Ubuntu for about ten years), so I'd say
it might make sense to enable this per default.
1ee5a5b6ed