Wireshark-bugs: [Wireshark-bugs] [Bug 12364] New: Crash in SCCP dissector UAT (Qt UI only)
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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Fri, 22 Apr 2016 20:08:34 +0000
Bug ID 12364
Summary Crash in SCCP dissector UAT (Qt UI only)
Product Wireshark
Version Git
Hardware All
OS All
Status UNCONFIRMED
Severity Major
Priority Low
Component Qt UI
Assignee bugzilla-admin@wireshark.org
Reporter jeff.morriss.ws@gmail.com 

Build Information:
Saw this in 2.0.2 and git but in the Qt UI only; Gtk+ is unaffected
--
While looking for another solution to:

https://ask.wireshark.org/questions/51860/unable-to-decode-gsm_map-protocol-layershowing-upto-sccp

I tried using the SCCP dissector's User Table.  While playing around with it
(changing values in the UAT) Wireshark kept crashing.

To repeat:

Open the capture file from that trace.
Click packet 3
Create a new SCCP Users Table entry but get the values (e.g., the DPC) wrong.
OK out, see that it doesn't work.
Edit the table again, fix the value that was wrong.  DO NOT HIT ENTER AFTER
TYPING.  Click on the OK button.
OK out so redissection happens.
--> crash.

The Gtk UI does not have this problem.

Investigation showed that the UAT's update callback was not being called (and
the SCCP dissector uses that to do some work--specifically, setting the handlep
value).

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