On 02.02.2018 19:24, Michael Biebl wrote:
> Am 02.02.2018 um 14:58 schrieb Sven Hartge:

>> The upstream commit db256aab13d8a89d583ecd2bacf0aca87c66effc "core: be 
>> stricter when handling PID files and MAINPID sd_notify() messages"
>> breaks several daemons in Debian.
>> Known issues exist for
>>   - munin-node https://bugs.debian.org/889073
>>   - ulogd2
>>   - dnsmasq https://lists.debian.org/debian-user/2018/01/msg01331.html
>> and possibly others.
>> Symptom is a timeout during service start, constant service restarts (if
>> configured) and log messages like:
>> Feb  2 14:22:49 HOST systemd[1]: ulogd2.service: Permission denied while 
>> opening PID file or unsafe symlink chain: /run/ulog/ulogd.pid
>> Feb  2 14:23:54 HOST systemd[1]: munin-node.service: Permission denied while 
>> opening PID file or unsafe symlink chain: /run/munin/munin-node.pid
>> Problem lies, as far as I understand the change, in the permissions of
>> the directory in which the PIDfile is created by the daemon. In all
>> cases it does not belong root:root but the respective service user:
> Do those services drop privileges on their own?

munin-node runs as root.

ulogd2 drops its priviliges on its own. It needs to start as root to
connect to the netlink sockets.


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