[Asterisk-bugs] [Asterisk 0010184]: Invalid memory reference crash in aji_handle_presence

[noreply at bugs.digium.com]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=10184 
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Reported By:                danmckeehan
Assigned To:                phsultan
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Project:                    Asterisk
Issue ID:                   10184
Category:                   Resources/res_jabber
Reproducibility:            random
Severity:                   crash
Priority:                   normal
Status:                     assigned
Asterisk Version:            SVN 
SVN Branch (only for SVN checkouts, not tarball releases):  trunk 
SVN Revision (number only!): 74204 
Disclaimer on File?:        No 
Request Review:              
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Date Submitted:             07-11-2007 15:22 CDT
Last Modified:              07-17-2007 03:42 CDT
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Summary:                    Invalid memory reference crash in
aji_handle_presence
Description: 
I have had the following crash several times.  Crash is in res_jabber:
http://bugs.digium.com/view.php?id=7  0x0012bf8b in aji_handle_presence
(client=Cannot access memory at
address 0xb02b102c
) at res_jabber.c:1283
        status = Cannot access memory at address 0xb02b1018

1283                    if (!strcasecmp(tmp->resource,
pak->from->resource)) {

(gdb) bt full
http://bugs.digium.com/view.php?id=0  0x005388f7 in strcasecmp () from
/lib/libc.so.6
No symbol table info available.
http://bugs.digium.com/view.php?id=1  0x000000b0 in ?? ()
No symbol table info available.
http://bugs.digium.com/view.php?id=2  0x0000006c in ?? ()
No symbol table info available.
http://bugs.digium.com/view.php?id=3  0x00133130 in ?? () from
/usr/lib/asterisk/modules/res_jabber.so
No symbol table info available.
http://bugs.digium.com/view.php?id=4  0x092b1024 in ?? ()
No symbol table info available.
http://bugs.digium.com/view.php?id=5  0x0913ae04 in ?? ()
No symbol table info available.
http://bugs.digium.com/view.php?id=6  0xb7d37e78 in ?? ()
No symbol table info available.
http://bugs.digium.com/view.php?id=7  0x0012bf8b in aji_handle_presence
(client=Cannot access memory at
address 0xb02b102c
) at res_jabber.c:1283
        status = Cannot access memory at address 0xb02b1018


(gdb) list res_jabber.c:1283
warning: Source file is more recent than executable.

1278            priority = atoi((iks_find_cdata(pak->x, "priority")) ?
iks_find_cdata(pak->x, "priority") : "0");
1279            tmp = buddy->resources;
1280            descrip = ast_strdup(iks_find_cdata(pak->x,"status"));
1281
1282            while (tmp) {
1283                    if (!strcasecmp(tmp->resource,
pak->from->resource)) {
1284                            tmp->status = status;
1285                            if (tmp->description)
ast_free(tmp->description);
1286                            tmp->description = descrip;
1287                            found = tmp;

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---------------------------------------------------------------------- 
 phsultan - 07-17-07 03:42  
---------------------------------------------------------------------- 
Did you try the trunk revision without modifying it? You can post your diff
file here too if you want, so that we can make sure that your modifications
are not the cause of the problem.

Anyhow, we must work on a common basis.

Please also turn the debug messages on (see my previous note), and apply
the attached log patch. We need to spot the 'resource' value that's
crashing Asterisk, which in your case is apparently not a NULL pointer. 

Issue History 
Date Modified   Username       Field                    Change               
====================================================================== 
07-17-07 03:42  phsultan       Note Added: 0067421                          
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