Wireshark · Wireshark-bugs: [Wireshark-bugs] [Bug 6550] New: Bus Error on ia64-hp-hpux due to alignment in emem.h

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https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6550

           Summary: Bus Error on ia64-hp-hpux due to alignment in emem.h
           Product: Wireshark
           Version: 1.6.3
          Platform: Other
        OS/Version: HP-UX
            Status: NEW
          Severity: Major
          Priority: Low
         Component: Wireshark
        AssignedTo: bugzilla-admin@xxxxxxxxxxxxx
        ReportedBy: bugs-wireshark@xxxxxxxxxxxxxxxxxxxxxxxxx


Created an attachment (id=7388)
 --> (https://bugs.wireshark.org/bugzilla/attachment.cgi?id=7388)
patch to define and use WS_MEM_ALIGN macro instead of G_MEM_ALIGN

Build Information:
Version 1.6.3 (SVN Rev 39702 from /trunk-1.6)

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 GLib 2.26.1, with libpcap 1.1.1, with
libz 1.2.5, without POSIX capabilities, with libpcre (version unknown), with
SMI
0.4.8, with c-ares 1.7.5, with Lua 5.1, without Python, with GnuTLS 2.10.5,
with
Gcrypt 1.4.6, without Kerberos, without GeoIP, without PortAudio, without
AirPcap.

Running on HP-UX B.11.31, with libpcap version 1.1.1, with libz 1.2.5, GnuTLS
2.10.5, Gcrypt 1.4.6.
--
We got a SIGBUS at startup running wireshark on ia64/hpux. Investigation led us
straight to epan/emem.h where we saw:
 /* XXX, is G_MEM_ALIGN enough?
http://mail.gnome.org/archives/gtk-devel-list/2004-December/msg00091.html */

Attached patch worked for us, it uses a WS_MEM_ALIGN macro instead of
G_MEM_ALIGN, and defines it to '8' though (sizeof(double)) would also work.

The problem was, if I remember correctly, due to the alignment of the double
time_first_t4_data member of the t38_conv_info struct in
epan/dissectors/packet-t38.h, which was being aligned on a 4 byte boundary.

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