[syslog-ng] [Bug 187] Syslog-ng truncates SDATA PARAM VALUE to 256 chars

bugzilla at bugzilla.balabit.com bugzilla at bugzilla.balabit.com
Fri Jul 27 07:46:24 CEST 2012


Balazs Scheidler <bazsi at balabit.hu> changed:

           What    |Removed                     |Added
         Resolution|                            |FIXED
             Status|NEW                         |RESOLVED

--- Comment #5 from Balazs Scheidler <bazsi at balabit.hu>  2012-07-27 07:46:23 ---
I think bumping the default limit to 64k should suffice, no real need to make this absolutely unbounded, as this is the first actual request to increase the

The patches below make this runtime configurable from the API side, even though it is not (yet) a configuration setting. Instead of alloca/scratch-buffers it
uses a gcc extension, if that proves unportable we can always change that.

I don't like allocating too much data from the stack, but I think 64k should be safe. The default stack limit on my x86_64 laptop is 8MB, I remember that 
being around 2MB on x86. 

commit bf69c41f696e7d94e424a40f5979bd5efcb33179
Author: Balazs Scheidler <bazsi at balabit.hu>
Date:   Fri Jul 27 07:42:18 2012 +0200

    msg-format: make sd_param_value maximum length adjustable via API

    Although this option is not (yet) introduced in the configuration file,
    the unit tests also try to cover the 'too-long-sdata' case, which is
    inpractical in case the new 64k default is to be overflown.

    It might make sense to make this value actually controllable by
    the configuration file, but for now I think it is enough to simply bump
    the default limit to 64k.

    This patch also fixes the test_msgparse unit test so it passes again.

    Signed-off-by: Balazs Scheidler <bazsi at balabit.hu>

commit ab9c013f7f06cbb024cae52905659450ddbdfaf1
Author: Balazs Scheidler <bazsi at balabit.hu>
Date:   Wed Jul 25 18:39:45 2012 +0200

    syslog-format: increase the limit for SDATA value length to 64k

    Reported-By: Sergey <cloun-rulez at yandex.ru>
    Signed-off-by: Balazs Scheidler <bazsi at balabit.hu>

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