writing oom_score_adj error: Permission denied

On Debian testing with dbus-daemon 1.12.20 (from dbus-daemon package version 1.12.20-3) the system log contains several:

dbus-daemon[1234]: writing oom_score_adj error: Permission denied

The logs indicate that this occurs during service activation of services in the user session such as at-spi2-registryd for org.a11y.atspi.Registry, mako for org.freedesktop.Notifications, xfconfd for org.xfce.Xfconf, and tumbler for org.freedesktop.thumbnails.Thumbnailer1 on my system.

It appears that dbus-daemon is run at oom_score_adj 200 for user sessions when started by systemd v250 and later due to https://github.com/systemd/systemd/pull/20893 . Presumably this prevents the activated service from decreasing oom_score_adj due to lacking CAP_SYS_RESOURCE.

Since Bug 32851, which introduced the OOM score adjustment, appears to be aimed at increasing the score adjustment (from -900 to 0), perhaps it would make sense to skip it when oom_score_adj is already <= 0?

Thanks, Kevin