No core dump on dbus-daemon crash

[Rick Mann]

User-vs-root or other core dump size limits?

http://www.akadia.com/services/ora_enable_core.html


> On Mar 16, 2015, at 09:43 , Jean-Pierre.Bogler at continental-corporation.com wrote:
> 
> Hello! 
> 
> I'm currently hunting a bug where the dbus-daemon (version 1.6.4) sporadically is killed 
> by a SIGSEGV during system start. Unfortunately, I don't get a core dump when the daemon 
> is started by the user "messagebus". 
> 
> root at imx6x-std:~# echo "/tmp/core" > /proc/sys/kernel/core_pattern 
> root at imx6x-std:~# dbus-daemon --address=unix:path=/tmp/bla1 --config-file=/etc/d 
> bus-1/system1.conf --nopidfile --fork 
> root at imx6x-std:~# busybox ps | grep dbus-daemon | head -n 1 
>  2504 messagebus 2548 S    dbus-daemon --address=unix:path=/tmp/bla1 --config-f 
> root at imx6x-std:~# kill -SEGV 2504 
> root at imx6x-std:~# ls /tmp/core* 
> ls: /tmp/core*: No such file or directory 
> 
> If I remove "<user>messagebus</user>" from the system(1).conf. The crash dumps are written! 
> Does someone have an idea why it doesn't work with user "messagebus"? 
> 
> Best regards 
> Jean-Pierre 
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-- 
Rick Mann
rmann at latencyzero.com