[syslog-ng] Syslog-ng-2.05 Segmentation Fault

[Shashank Vinchurkar]

file : logmsg.c, 

function : 
void log_msg_clear_matches(LogMessage *self) 

replace line :
g_free(self->re_matches);
with
if (self->num_re_matches)
{
  g_free(self->re_matches);
} 

-----Original Message-----
From: syslog-ng-bounces at lists.balabit.hu
[mailto:syslog-ng-bounces at lists.balabit.hu] On Behalf Of Daniel
Szmandiuk
Sent: Thursday, November 08, 2007 4:32 PM
To: Syslog-ng users' and developers' mailing list
Subject: Re: [syslog-ng] Syslog-ng-2.05 Segmentation Fault

Shashank,

Unfortunately I'm no C programmer, but I can hack code with some
instructions. I'm not quite sure what I need to do get around the
problems. Can you supply me with some more detailed instructions?
Something like "change line x from A to B" would be great...

Daniel


-----Original Message-----
From: syslog-ng-bounces at lists.balabit.hu
[mailto:syslog-ng-bounces at lists.balabit.hu] On Behalf Of Shashank
Vinchurkar
Sent: Friday, 9 November 2007 10:44 AM
To: Syslog-ng users' and developers' mailing list
Subject: Re: [syslog-ng] Syslog-ng-2.05 Segmentation Fault

Daniel,

I didn't try with older version of syslog-ng. You can get around the
first problem with the changes I had suggested.

The second problem seemed to be related to glib library. I could get
around it by hacking the value of the Gstring returned by the
g_string_printf. But it didn't seem to be right solution. I tried older
version of glib but it didn't seem to work.

I was cross compiling both syslog-ng and glib.

-Shashank

-----Original Message-----
From: syslog-ng-bounces at lists.balabit.hu
[mailto:syslog-ng-bounces at lists.balabit.hu] On Behalf Of Daniel
Szmandiuk
Sent: Thursday, November 08, 2007 2:33 PM
To: Syslog-ng users' and developers' mailing list
Subject: Re: [syslog-ng] Syslog-ng-2.05 Segmentation Fault

Shashank,

Did you successfully get any older version of syslog-ng compiled &
working on your mips64 system? I'm trying to get a syslog-ng system up
and running for testing fairly quickly at the moment.

Daniel


-----Original Message-----
From: syslog-ng-bounces at lists.balabit.hu
[mailto:syslog-ng-bounces at lists.balabit.hu] On Behalf Of Shashank
Vinchurkar
Sent: Friday, 9 November 2007 5:35 AM
To: Syslog-ng users' and developers' mailing list
Subject: Re: [syslog-ng] Syslog-ng-2.05 Segmentation Fault

I was hitting this issue on mips64 (had reported it on this list).
Debugging the issue the culprit seemed to be the call
g_free(self->re_matches) in function log_msg_clear_matches (logmsg.c).
The values of the self->re_matches was zero when it was getting segfault
but the pointer self->re_matches had a non-null value. Making the g_free
conditional seemed to work for me.

I was able to get past this issue but was seeing some other strange
behavior and could not get the syslog-ng to work on mips64. I was not
able to get the messages to log to the log file /var/log/messages
(reported it on this list). Debugging the issue it seemed the
g_string_printf in log_write_format_log function was not working
properly on 64bit mips and thus the log was never written to the file or
any other output device.


-----Original Message-----
From: syslog-ng-bounces at lists.balabit.hu
[mailto:syslog-ng-bounces at lists.balabit.hu] On Behalf Of Balazs
Scheidler
Sent: Thursday, November 08, 2007 7:21 AM
To: Syslog-ng users' and developers' mailing list
Subject: Re: [syslog-ng] Syslog-ng-2.05 Segmentation Fault

Hm.. the same has been reported on a mips64 system. This must be a 64
bit related issue, then. I'll try to get a 64 compile environment.

Anyone else who uses syslog-ng 2.0.x on 64 bit systems?

On Thu, 2007-11-08 at 23:34 +1100, Daniel Szmandiuk wrote:
> Here's the backtrace:
> GNU gdb Red Hat Linux (6.5-16.el5rh)
> Copyright (C) 2006 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and 
> you are welcome to change it and/or distribute copies of it under 
> certain conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB.  Type "show warranty" for 
> details.
> This GDB was configured as "x86_64-redhat-linux-gnu"...Using host 
> libthread_db library "/lib64/libthread_db.so.1".

--
Bazsi

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