On Wed, 26 Aug 2009, Rainer Gerhards wrote:

>> -----Original Message-----
>> From: [email protected] [mailto:rsyslog-
>> [email protected]] On Behalf Of [email protected]
>> Sent: Wednesday, August 26, 2009 3:42 PM
>> To: rsyslog-users
>> Subject: Re: [rsyslog] abort in 4.2.1
>>
>> (gdb) thread 1
>> [Switching to thread 1 (process 11534)]#0  sanitizeMessage
>> (pMsg=0x7f312c001530) at parser.c:222
>> 222                     if(pszMsg[iSrc] == '\0') { /* guard against \0
>> characters... */
>>
>> (gdb) print sanitizeMessage::pszMsg
>> $10 = (uchar *) 0x7f312c001658 ""
>> (gdb) print sanitizeMessage::szSanBuf
>> $11 =
>> "?Z\224J\\002\\010\\031\\025*8\\006+?\\007?\204\\011\\002\\010\\031\\02
>
> On quick look, this looks seriously malformed, so I think either the message
> object or the pointer to it (more likely) was corrupted some time before it
> was passed to the function that than malfunctioned. Will look now more
> in-depth, but it looks like we need to have one of these situations where the
> bug bites at a totally unrelated section of the code but causes a crash
> somewhere else.
>
> Would it be possible to run the instance under valgrind control? It will run
> 5 to 10 times slower, but if that would be fast enough, it could (could!)
> help to pinpoint the root cause. I can talk you through using the tool if you
> do not have used it before (its quite trivial).

that would be hard to so for a couple reasons

at 5-10 times slower the system may not be able to keep up (even with the 
'slower' afternoon traffic)

this is running on a very hardened production server, getting valgrind 
installed there would require permission from the SVP level.

David Lang
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