Wireshark-bugs: [Wireshark-bugs] [Bug 6622] Wireshark crashes in gsm_map dissector

Date: Mon, 28 Nov 2011 23:05:59 -0800 (PST)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6622

--- Comment #2 from Anders Broman <anders.broman@xxxxxxxxxxxx> 2011-11-28 23:05:58 PST ---
A "fix" Committed revision 40033.

Jeff's comments on the problem:

The REAL problem is that the GSM_MAP dissector is using this value_string_ext
in the hf without BASE_EXT_STRING:

    { &hf_gsm_old_localValue,
      { "localValue", "gsm_old.localValue",
        FT_INT32, BASE_DEC, &gsm_old_GSMMAPOperationLocalvalue_vals_ext, 0,
        "OperationLocalvalue", HFILL }},

This, in turn, appears to be caused because OperationLocalValue is an alias
for/of GSMMAPOperationLocalValue and only the latter is defined with
.USE_VALS_EXT.

I can fix it by doing:

Index: asn1/gsm_map/gsm_map.cnf
===================================================================
--- asn1/gsm_map/gsm_map.cnf    (revision 39628)
+++ asn1/gsm_map/gsm_map.cnf    (working copy)
@@ -54,6 +54,7 @@

 #.USE_VALS_EXT
 GSMMAPOperationLocalvalue
+OperationLocalvalue

 #.EXPORTS
 AddressString


But it seems to be that asn2wrs should arguably be figuring this out on its
own.

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