Ethereal-users: Re: [Ethereal-users] Ethereal 10.8 (win and linux) crashing - x11

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From: LEGO <luis.ontanon@xxxxxxxxx>
Date: Mon, 10 Jan 2005 20:13:12 +0100
On Mon, 10 Jan 2005 18:20:05 +0100, Matevž Pustišek
<matevz.pustisek@xxxxxxxxxxxx> wrote:
>  
> Matevž Pustišek wrote: 
> Hi!
> I have captured some network traffic using Ethereal 10.8 on a Debian
> machine. The capturing went well. During the analysis of the captured file,
> Ethereal 10.8. (both linux and win) crashes and tethereal reports a
> segmentation fault. I managed to locate (one of) the problematic packet (it
> is attached to this email). In widows version opening the file causes the
> crash. With tethereal (win) I have to specify some filtering to cause it,
> eg:
> tethereal -r crashing-2005-01-07.cap -w abc.cap tcp
> The linux version of tetheral reports a segmentation fault in this case. I
> managed to get the following message in some cases with windows version: 
> 
> 
> tethereal 0.10.8 (SVN 20050103222645)
> Compiled with GLib 2.4.6, with libpcap 0.8.3, with libz 1.1.4, with libpcre
> 4.4, with Net-SNMP 5.1, with ADNS.
> Running with libpcap version 0.8.3 on Linux 2.4.21.
> 
> has no problems with it on my box:
> 
> : tethereal -r ~/mail/crashing-2005-01-07.cap
> 1 0.000000 193.2.72.62 -> 213.157.237.128 TCP [TCP segment of a reassembled
> PDU] 
>   
> Please, Andy, could you try with tcp filter: 
> : tethereal -r ~/mail/crashing-2005-01-07.cap tcp 
>   
> (with tetheral it crashes only when applying some filtering, in the case of
> ethereal already opening the file causes the problem) 
>   
> I tested the case on two more machines (Win, Ethereal 10.7 and 10.4) and it
> doesn't work there either. 

In my case tethereal crashes only when given "tcp" as filter, oddly
enough I do not get a full backtrace. This is what I get:
(gdb) run  -r crashing-2005-01-07.cap tcp
Starting program: /opt/local/bin/tethereal -r crashing-2005-01-07.cap tcp

Program received signal EXC_BAD_ACCESS, Could not access memory.
do_throw (except=0xbfffbad0) at except.c:174
174                 const except_id_t *pi = catcher->except_id;
(gdb) bt
#0  do_throw (except=0xbfffbad0) at except.c:174
#1  0x01a76960 in except_throw (group=1768322109, code=2,
msg=0x1e42800 "XCEPT_GROUP_ETHEREAL") at except.c:256
#2  0x01a904f4 in ensure_contiguous (tvb=0xbfffbad0, offset=2,
length=31729664) at tvbuff.c:857
#3  0x01dfd9a0 in listOfKeycode (tvb=0x38cf6e8, offsetp=0xbfffc030,
t=0x1e42800, hf=-1073759536, modifiermap=0x68bc44,
keycodes_per_modifier=230, little_endian=824174292) at
packet-x11.c:1802
#4  0x53686966 in ?? ()
(gdb) frame 3
#3  0x01dfd9a0 in listOfKeycode (tvb=0x38cf6e8, offsetp=0xbfffc030,
t=0x1e42800, hf=-1073759536, modifiermap=0x68bc44,
keycodes_per_modifier=230, little_endian=824174292) at
packet-x11.c:1802
1802                p = tvb_get_ptr(tvb, *offsetp, keycodes_per_modifier);
(gdb) p tvb
$13 = (tvbuff_t *) 0x38cf6e8
(gdb) p *offsetp
$14 = 1026700568
(gdb)