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RE: RE : [lwip-devel] Crash Bug

From: Julian Gardner [RSD]
Subject: RE: RE : [lwip-devel] Crash Bug
Date: Fri, 18 May 2007 11:42:27 +0100

Well just started debugging the assert and the address I have for struct pbuf 
*p is 0x8c04260 which is NOT in my address map! Looks like something is 
corrupting memory pointers.


-----Original Message-----
From: address@hidden [mailto:address@hidden On Behalf Of Frédéric BERNON
Sent: 17 May 2007 19:20
To: lwip-devel
Subject: RE : [lwip-devel] Crash Bug

Some ideas: Simon also check in a fix for pbuf_free (in ethernetif.c, tcpip.c, 
slipif.c, loopif.c). Try it...

Another thing: do you use LWIP_SNMP? I also got a crash with last changes about 
mem.c, but it seems more that snmp do a memory overwrite, and that new mem.c is 
just more "sensible" to this problem (it's not sure to 100%, but I check with 
Frédéric BERNON 
Chef de projet informatique 
Microsoft Certified Professional 
Tél. : +33 (0)4-67-87-61-10 
Fax. : +33 (0)4-67-70-85-44 
Email : address@hidden 
Web Site : http://www.hymatom.fr 
P Avant d'imprimer, penser à l'environnement

-----Message d'origine-----
De : address@hidden [mailto:address@hidden De la part de Kieran Mansley
Envoyé : jeudi 17 mai 2007 16:36
À : lwip-devel
Objet : RE: [lwip-devel] Crash Bug

On Thu, 2007-05-17 at 15:25 +0100, Julian Gardner [RSD] wrote:
> Looking through the code it seems to use socket, setsockoption, 
> select, send and recv

So the sockets API.  That should have remained reasonably unchanged as far as 
applications are concerned, which means it's more likely a bug in the recent 

> Is there any debug I could turn on to try and find this problem!

Perhaps the most useful thing at this stage would be to narrow it down to a 
precise checkin.  Can you take the CVS code from around the time that you think 
it went wrong (i.e. before and after each checkin) and see which one is at 


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