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Wireshark-bugs: [Wireshark-bugs] [Bug 6278] New: PACKET_UPLINK_ACK_NACK gsm_rlcmac_dl causing er

Date: Mon, 29 Aug 2011 04:10:54 -0700 (PDT)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6278

           Summary: PACKET_UPLINK_ACK_NACK gsm_rlcmac_dl causing error
                    when decoding paddin bits
           Product: Wireshark
           Version: 1.7.x (Experimental)
          Platform: x86
        OS/Version: Windows XP
            Status: NEW
          Severity: Normal
          Priority: Low
         Component: Wireshark
        AssignedTo: bugzilla-admin@xxxxxxxxxxxxx
        ReportedBy: angelbartomeu@xxxxxxxxx


Created an attachment (id=6882)
 --> (https://bugs.wireshark.org/bugzilla/attachment.cgi?id=6882)
failed assertion "DISSECTOR_ASSERT_NOT_REACHED" error decoding EGPRS ack/Nack

Build Information:
Version 1.7.0 (SVN Rev 38745 from /trunk)

Copyright 1998-2011 Gerald Combs <gerald@xxxxxxxxxxxxx> and contributors.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Compiled (32-bit) with GTK+ 2.22.1, with Cairo 1.10.2, with Pango 1.28.3, with
GLib 2.26.1, with WinPcap (version unknown), with libz 1.2.5, without POSIX
capabilities, with threads support, with SMI 0.4.8, with c-ares 1.7.1, with Lua
5.1, without Python, with GnuTLS 2.10.3, with Gcrypt 1.4.6, with MIT Kerberos,
with GeoIP, with PortAudio V19-devel (built Aug 25 2011), with AirPcap.

Running on Windows XP Service Pack 3, build 2600, with WinPcap version 4.1.2
(packet.dll version 4.1.0.2001), based on libpcap version 1.0 branch 1_0_rel0b
(20091008), GnuTLS 2.10.3, Gcrypt 1.4.6, without AirPcap.

Built using Microsoft Visual C++ 9.0 build 30729

--
[Dissector bug, protocol GSM RLC MAC: tvbuff.c:1793: failed assertion
"DISSECTOR_ASSERT_NOT_REACHED"] 

Did the fix for https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6266 break
this case?
is M_LEFT_VAR_BMP able to precess a zero bits URBB?

The bug is NOT present in Version 1.6.1 (SVN Rev 38096 from /trunk-1.6)

See attached file.

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