Re: F18: abrt not catching segfaults by cups und dnsmasq

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Hi Michal,

yes, stupid me.

echo 2 > /proc/sys/fs/suid_dumpable

and abrt catches the dnsmasq crash.

btw: the dnsmasq bug was fixed in upstream today.

cu romal

Am 19.02.13 09:18, schrieb Michal Toman:
On 18.02.2013 20:40, Adam Williamson  wrote:
On 18/02/13 10:38 AM, Robert M. Albrecht wrote:
Hi,

yes, we are both talking about the clients running as root.

dnsmasq is compiled with gcc, so CCpp should catch the crash.

I compiled dnsmasq from source and tested this binary (which also
crashes due to the same bug). These crashes are overlooked also.

ProcessUnpackaged ist set to yes.

Even killall -ABRT dnsmasq manages to escape ABRT.

I updated abrt* from updates-testing, no changes.

Starting to sound like a bug, then. Maybe file it against the ccpp
plugin?

Hi,

this is not really a bug. AFAIK dnsmasq drops privileges and thus calls
setuid(). Applications doing this are not dumped by default because of
security reasons - kernel does not even call the coredump hook. You can
enable this by setting the value of /proc/sys/fs/suid_dumpable to either
1 or 2. See man 5 proc for details.

Michal
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