On 12/05/2016 08:54 AM, Jan Kurik wrote:
= System Wide Change: Enable coredumpctl by default = https://fedoraproject.org/wiki/Changes/coredumpctl Change owner(s): * Michael Catanzaro <mcatanzaro AT gnome DOT org> Enable coredumpctl by default. Core dumps will be stored in the system journal rather than created in the crashing process's current working directory by ABRT.
systemd-coredump (or, rather, journald) ignores the split between system accounts and user accounts as configured in /etc/login.defs ("the authoritative definition of UID/GID space allocation", according to the Fedora wiki) and instead hard codes 1000 as the split*.
The end result is that when systemd-coredump enabled, unprivileged users cannot access their own core dumps. (Or any of their own logs in journald.)
This means that if you are a loyal Fedora user that initially installed before the change from 500 to 1000 (Fedora 15 or earlier) and have been faithfully upgrading from release to release, enabling systemd-coredump by default in Fedora 26 will be a regression in functionality.
systemd-coredump should not be enabled by default in Fedora until this bug is fixed by the systemd developers.
*: It's actually more egregious than that: /etc/login.defs is parsed on the build machine at compile time and the extracted value is hard coded into the various systemd executables which then completely ignore /etc/login.defs at run time.
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