Re: wheezy, message log being spammed by segfaults from apt_check.py
On Thursday 14 January 2016 08:43:53 Johann Klammer wrote:
> On 01/14/2016 04:00 AM, Gene Heskett wrote:
> > Greetings all;
> >
> > Intermittently but sometimes several times an hour from the times
> > recorded. The error portion of the logged line:word wrapped
> >
> > segfault at 0 ip b7614966 sp bf9b64c8 error 6 in
> > libc-2.13.so[b759b000+15e000
> >
> > No clue what an error 6 means. No errors shown in the man page, just
> > mild horn blowing.
> >
> > And the segfault goes away if root runs it, so I have to assume root
> > is not running it. Does anyone have a clue what I should be looking
> > at and what to check for?
> >
> > Thanks.
> >
> > Cheers, Gene Heskett
>
> segfaults are always bad. It's dereferencing a NULL pointer here.
> the exact numbers are in some intel processor manual,
> but won't help you unless you want to debug the program.
> It's probably an at or cron job running this script.
> Perhaps something involved with auto-updating.
On a hunch, I just ran synaptic via tdesudo, then checked the log after
every operation, like reload, and the message appears at the very end of
the reload as its redrawing the file listings
But, when I ran it from synaptic-pkexec the log message appeared at the
end of the reload as it was redrawing the file list. Same as above.
Since I use synaptic to keep all my machines up to date, I'll go check
the logs on the other three. ssh'd into each so I only have one terminal
screen, but I ran synaptic-pkexec, updated all 3 machines, without
generating a segfault, so its local to this machine. The first machine I
checked, has also had TDE installed, the other 2 are still on KDE for a
user facing gui. Other than that, all 4 machines were installed from
the same hybride-iso image you can get from linuxcnc.org. Its based on
debian wheezy, but with a pinned kernel on the other 3 machines, the
kernels haveing been patched with the RTAI kit for realtime usage. All
4 machines are running a 3.4-9-rtai-686-pae kernel, which unfortunately
for this machine, pae doesn't work after the rtai patch, but this is the
only machine with sufficient (8Gb) memory to make use of the pae.
There is a 3.16-something or other kernel that it wants me to update to,
and which is installed, but its a 64 bit kernel and linuxcnc will not run
on a 64 bit kernel for realtime stuff. So I always reboot to the one I
know works as I quite often develop the gcode I write, on this machine,
verifying it runs in the simulator & then shipping it to the machine
that will make the part.
But I think I'll reboot to that kernel image and find out. Later.
But I've no clue where to look next. Synaptic itself does not appear to
be effected by it. If it actually mis-behaved somehow, that would be a
better clue.
Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>
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