[Matroska-users] Mkclean sigsev on a specific file

julroy67 julroy67 at gmail.com
Fri Jul 16 20:38:42 CEST 2010


Nice, good to hear it, thanks. But now, shall I report this to the
handbrake devs ? And second one, I trie the svn version, and it seems
to work, but now it is a libc segfault :
http://julroy67.free.fr/DL/bt_libc.log :(

But still thanks for the fix.

2010/7/16 Steve Lhomme <slhomme at matroska.org>:
> Hi again,
> I've identified the problem. It seems that Handbrake is writing a CRC
> element at the wrong location (second element of SegmentInfo) and with the
> wrong size (12 instead of 4). That made mkclean behave inconsistently. I've
> identified other possible problems in mkclean and they are all fixed in SVN.
> I am not going to make a release today as I have other things I want to put
> in the next one (hopefully this week-end).
> If you don't want to wait for the next release, you can get the latest
> sources from SVN
> at https://matroska.svn.sourceforge.net/svnroot/matroska/trunk/foundation_src
> You will need to copy <root>/mkclean/default_config.h into <root>/config.h
> before running "coremake gcc_linux_x64"
> Steve
> On Fri, Jul 16, 2010 at 4:41 PM, julroy67 <julroy67 at gmail.com> wrote:
>>
>> Ok, here is the dump http://julroy67.free.fr/DL/TGBS_4925_dump_1M>> dd if=Test.mkv of=TGBS_4925_dump_1M bs=1M count=1 » should be
>> correct).
>>
>> 2010/7/16 Steve Lhomme <slhomme at matroska.org>:
>> > OK that all looks correct. Can you cut the first 1 or 2 first MB of the
>> > file
>> > and send them to me ?
>> >
>> > On Fri, Jul 16, 2010 at 4:30 PM, julroy67 <julroy67 at gmail.com> wrote:
>> >>
>> >> Yes, it plays fine (VLC and Mplayer at least). The mkvinfo simple
>> >> output : http://julroy67.free.fr/DL/TGBS_4925_mkvinfo.txt
>> >>
>> >> 2010/7/16 Steve Lhomme <slhomme at matroska.org>:
>> >> > OK it seems your file has no (found) Tracks. Does it play correctly ?
>> >> > It's
>> >> > not normal for a file that big to have no Tracks (it's possible for
>> >> > files
>> >> > with only chapters or attachments). And theoretically the code should
>> >> > exit
>> >> > before the crash, as there is a check to see if there are Cluster but
>> >> > no
>> >> > matching Tracks. So I don't know how you are getting to that point.
>> >> > Can you send me the output of mkvinfo on that file ? You can use
>> >> > pastebin or
>> >> > that same web server you used.
>> >> > Thanks,
>> >> > Steve
>> >> >
>> >> > On Fri, Jul 16, 2010 at 3:50 PM, julroy67 <julroy67 at gmail.com> wrote:
>> >> >>
>> >> >> Here is the nice full output :
>> >> >> http://julroy67.free.fr/DL/mkclean_full_backtrace.log
>> >> >>
>> >> >> Sending the file can be made, but they all are over 1 Gb, the
>> >> >> smallest
>> >> >> is 1.2 Gb and would take a long time to upload if so.
>> >> >>
>> >> >> 2010/7/16 Steve Lhomme <slhomme at matroska.org>:
>> >> >> > Can you get a bigger backtrace, up to the main() if possible ? Is
>> >> >> > it
>> >> >> > possible to get one of the files that crash (the smallest) ?
>> >> >> >
>> >> >> > On Fri, Jul 16, 2010 at 3:26 PM, julroy67 <julroy67 at gmail.com>
>> >> >> > wrote:
>> >> >> >>
>> >> >> >> So, better, than before. The first version, with a clean build,
>> >> >> >> crashes like the arch package, same output. And now for the debug
>> >> >> >> version, the real output (I have missed up something in the other
>> >> >> >> version, that crashed at startup) :
>> >> >> >>
>> >> >> >> 15:23 julroy67 at momoko-laptop ~/Apps/mkclean/mkclean-0.4.1% gdb
>> >> >> >> release/gcc_linux_x64_debug/mkclean
>> >> >> >> GNU gdb (GDB) 7.1
>> >> >> >> Copyright (C) 2010 Free Software Foundation, Inc.
>> >> >> >> License GPLv3+: GNU GPL version 3 or later
>> >> >> >> <http://gnu.org/licenses/gpl.html>
>> >> >> >> This is free software: you are free to change and redistribute
>> >> >> >> it.
>> >> >> >> There is NO WARRANTY, to the extent permitted by law.  Type "show
>> >> >> >> copying"
>> >> >> >> and "show warranty" for details.
>> >> >> >> This GDB was configured as "x86_64-unknown-linux-gnu".
>> >> >> >> For bug reporting instructions, please see:
>> >> >> >> <http://www.gnu.org/software/gdb/bugs/>...
>> >> >> >> Reading symbols from
>> >> >> >>
>> >> >> >>
>> >> >> >>
>> >> >> >>
>> >> >> >> /home/julroy67/Apps/mkclean/mkclean-0.4.1/release/gcc_linux_x64_debug/mkclean...done.
>> >> >> >> (gdb) run --optimize --remux Test.mkv Test.mkv.2
>> >> >> >> Starting program:
>> >> >> >>
>> >> >> >>
>> >> >> >>
>> >> >> >>
>> >> >> >> /home/julroy67/Apps/mkclean/mkclean-0.4.1/release/gcc_linux_x64_debug/mkclean
>> >> >> >> --optimize --remux Test.mkv Test.mkv.2
>> >> >> >> [Thread debugging using libthread_db enabled]
>> >> >> >> Progress 1/3: 100%
>> >> >> >>
>> >> >> >> Program received signal SIGSEGV, Segmentation fault.
>> >> >> >> 0x000000000042b4af in EBML_MasterFindFirstElt (Element=0x0,
>> >> >> >> Context=0x656ce0, bCreateIfNull=0, SetDefault=0) at
>> >> >> >> ebmlmaster.c:46
>> >> >> >> 46          for
>> >> >> >> (i=EBML_MasterChildren(Element);i;i=EBML_MasterNext(i))
>> >> >> >>
>> >> >> >> This one is the good, I think.
>> >> >> >>
>> >> >> >> 2010/7/16 Steve Lhomme <slhomme at matroska.org>:
>> >> >> >> > Before starting to debug you should try to build it first like
>> >> >> >> > I
>> >> >> >> > just
>> >> >> >> > described you. Using the available source package
>> >> >> >> >
>> >> >> >> >
>> >> >> >> > here: http://dl.matroska.org/downloads/mkclean/mkclean-0.4.1.tar.bz2
>> >> >> >> > I don't know about archlinux and how you got that package and
>> >> >> >> > who
>> >> >> >> > made
>> >> >> >> > it.
>> >> >> >> > So I don't know what it contains and if it's correct. mkclean
>> >> >> >> > doesn't
>> >> >> >> > use
>> >> >> >> > the usual autoconf/automake system found on Linux, so maybe it
>> >> >> >> > was
>> >> >> >> > packaged
>> >> >> >> > incorrectly.
>> >> >> >> > If you manage to build it like I said and it still fails, you
>> >> >> >> > can
>> >> >> >> > try
>> >> >> >> > to
>> >> >> >> > rebuild it with debug informations like this:
>> >> >> >> > ./coremake distclean
>> >> >> >> > ./coremake gcc_linux_x64_debug
>> >> >> >> >
>> >> >> >> > Steve
>> >> >> >> > On Fri, Jul 16, 2010 at 3:05 PM, julroy67 <julroy67 at gmail.com>
>> >> >> >> > wrote:
>> >> >> >> >>
>> >> >> >> >> Mhh I don't know if I'm correctly generating the debug version
>> >> >> >> >> of
>> >> >> >> >> mkclean, could you say me step by step how to it. To be clear,
>> >> >> >> >> I'm
>> >> >> >> >> using archlinux, and archlinux AUR package of mkclean, it
>> >> >> >> >> works
>> >> >> >> >> for
>> >> >> >> >> most of the file, but for at least 2 of them, it crashes as
>> >> >> >> >> this
>> >> >> >> >> :
>> >> >> >> >>
>> >> >> >> >> 14:59 julroy67 at momoko-laptop ~% mkclean --optimize --remux
>> >> >> >> >> Test.mkv
>> >> >> >> >> Test.mkv.2
>> >> >> >> >> Progress 1/3: 100%
>> >> >> >> >> zsh: segmentation fault  mkclean --optimize --remux Test.mkv
>> >> >> >> >> Test.mkv.2
>> >> >> >> >>
>> >> >> >> >> And it seems that the debug binary that I've generated crashes
>> >> >> >> >> always,
>> >> >> >> >> so I'm doing wrong, but still, mkclean has a error somewhere
>> >> >> >> >> ^^'
>> >> >> >> >> So
>> >> >> >> >> to
>> >> >> >> >> be sure to do correctly, I think, a step by step debugging
>> >> >> >> >> guide
>> >> >> >> >> would
>> >> >> >> >> help. Sorry for the hassle.
>> >> >> >> >>
>> >> >> >> >> 2010/7/16 Steve Lhomme <slhomme at matroska.org>:
>> >> >> >> >> > Hi.
>> >> >> >> >> > Given the nature of the crash, it looks like it should
>> >> >> >> >> > always
>> >> >> >> >> > crash
>> >> >> >> >> > as
>> >> >> >> >> > that
>> >> >> >> >> > error is on the init. It may have to do with linux x64
>> >> >> >> >> > rather
>> >> >> >> >> > than
>> >> >> >> >> > 32
>> >> >> >> >> > bits.
>> >> >> >> >> > I'll give it a try on my side.
>> >> >> >> >> > Or did you compile it with a 32 bits tool chain ? The
>> >> >> >> >> > regular
>> >> >> >> >> > bootstrap.sh
>> >> >> >> >> > and subsequent "make" command are building for 32 bits. In
>> >> >> >> >> > 0.4.2
>> >> >> >> >> > that
>> >> >> >> >> > should
>> >> >> >> >> > be released soon I changed that and there is now a
>> >> >> >> >> > "configure"
>> >> >> >> >> > script.
>> >> >> >> >> > It
>> >> >> >> >> > will build the makefiles for 64 bits architecture on 64 bits
>> >> >> >> >> > ones...
>> >> >> >> >> > Meanwhile you can make sure or that by running that in the
>> >> >> >> >> > root
>> >> >> >> >> > folder
>> >> >> >> >> > of
>> >> >> >> >> > the sources:
>> >> >> >> >> > ./coremake distclean
>> >> >> >> >> > ./coremake gcc_linux_x64
>> >> >> >> >> > Then you run "make -C mkclean" and it should work.
>> >> >> >> >> >
>> >> >> >> >> > On Fri, Jul 16, 2010 at 2:41 PM, julroy67
>> >> >> >> >> > <julroy67 at gmail.com>
>> >> >> >> >> > wrote:
>> >> >> >> >> >>
>> >> >> >> >> >> Hello,
>> >> >> >> >> >>
>> >> >> >> >> >> I'm using mkclean to clean up my mkv files that are for the
>> >> >> >> >> >> most
>> >> >> >> >> >> not
>> >> >> >> >> >> valid as mkvalidate says, but on certain files, mkclean
>> >> >> >> >> >> crashes.
>> >> >> >> >> >> I've
>> >> >> >> >> >> managed to get the backtrace from gdb. But I'm not sure
>> >> >> >> >> >> where
>> >> >> >> >> >> I
>> >> >> >> >> >> have
>> >> >> >> >> >> to report the issue.
>> >> >> >> >> >>
>> >> >> >> >> >> For the backtrace here's it :
>> >> >> >> >> >>
>> >> >> >> >> >> 14:30 julroy67 at momoko-laptop
>> >> >> >> >> >> ~/Apps/mkclean/src/mkclean-0.4.1%
>> >> >> >> >> >> gdb
>> >> >> >> >> >> release/gcc_linux_x64/mkclean
>> >> >> >> >> >> GNU gdb (GDB) 7.1
>> >> >> >> >> >> Copyright (C) 2010 Free Software Foundation, Inc.
>> >> >> >> >> >> License GPLv3+: GNU GPL version 3 or later
>> >> >> >> >> >> <http://gnu.org/licenses/gpl.html>
>> >> >> >> >> >> This is free software: you are free to change and
>> >> >> >> >> >> redistribute
>> >> >> >> >> >> it.
>> >> >> >> >> >> There is NO WARRANTY, to the extent permitted by law.  Type
>> >> >> >> >> >> "show
>> >> >> >> >> >> copying"
>> >> >> >> >> >> and "show warranty" for details.
>> >> >> >> >> >> This GDB was configured as "x86_64-unknown-linux-gnu".
>> >> >> >> >> >> For bug reporting instructions, please see:
>> >> >> >> >> >> <http://www.gnu.org/software/gdb/bugs/>...
>> >> >> >> >> >> Reading symbols from
>> >> >> >> >> >>
>> >> >> >> >> >>
>> >> >> >> >> >>
>> >> >> >> >> >>
>> >> >> >> >> >>
>> >> >> >> >> >>
>> >> >> >> >> >> /home/julroy67/Apps/mkclean/src/mkclean-0.4.1/release/gcc_linux_x64/mkclean...done.
>> >> >> >> >> >> (gdb) run --optimize --remux Test.mkv Test.mkv.2
>> >> >> >> >> >> Starting program:
>> >> >> >> >> >>
>> >> >> >> >> >>
>> >> >> >> >> >>
>> >> >> >> >> >>
>> >> >> >> >> >>
>> >> >> >> >> >>
>> >> >> >> >> >> /home/julroy67/Apps/mkclean/src/mkclean-0.4.1/release/gcc_linux_x64/mkclean
>> >> >> >> >> >> --optimize --remux Test.mkv Test.mkv.2
>> >> >> >> >> >> [Thread debugging using libthread_db enabled]
>> >> >> >> >> >>
>> >> >> >> >> >> Program received signal SIGSEGV, Segmentation fault.
>> >> >> >> >> >> 0x000000000040180e in ProjectSettings (p=0x7fffffffdc10) at
>> >> >> >> >> >> mkclean_stdafx.c:99
>> >> >> >> >> >> 99
>> >> >> >> >> >>
>> >> >> >> >> >>
>> >> >> >> >> >>
>> >> >> >> >> >>
>> >> >> >> >> >>
>> >> >> >> >> >>  Node_SetData((node*)p,NODECONTEXT_PROJECT_NAME,TYPE_STRING,PROJECT_NAME);
>> >> >> >> >> >>
>> >> >> >> >> >> or see here :
>> >> >> >> >> >> http://julroy67.free.fr/DL/mkclean_crash_backtrace.log
>> >> >> >> >> >>
>> >> >> >> >> >> So anyone can say what I've to do ?
>> >> >> >> >> >>
>> >> >> >> >> >> Thanks.
>> >> >> >> >> >> _______________________________________________
>> >> >> >> >> >> Matroska-users mailing list
>> >> >> >> >> >> Matroska-users at lists.matroska.org
>> >> >> >> >> >>
>> >> >> >> >> >>
>> >> >> >> >> >> http://lists.matroska.org/cgi-bin/mailman/listinfo/matroska-users
>> >> >> >> >> >> Read Matroska-Users on GMane:
>> >> >> >> >> >> http://dir.gmane.org/gmane.comp.multimedia.matroska.user
>> >> >> >> >> >
>> >> >> >> >> >
>> >> >> >> >> > _______________________________________________
>> >> >> >> >> > Matroska-users mailing list
>> >> >> >> >> > Matroska-users at lists.matroska.org
>> >> >> >> >> >
>> >> >> >> >> >
>> >> >> >> >> > http://lists.matroska.org/cgi-bin/mailman/listinfo/matroska-users
>> >> >> >> >> > Read Matroska-Users on GMane:
>> >> >> >> >> > http://dir.gmane.org/gmane.comp.multimedia.matroska.user
>> >> >> >> >> >
>> >> >> >> >> >
>> >> >> >> >> _______________________________________________
>> >> >> >> >> Matroska-users mailing list
>> >> >> >> >> Matroska-users at lists.matroska.org
>> >> >> >> >>
>> >> >> >> >> http://lists.matroska.org/cgi-bin/mailman/listinfo/matroska-users
>> >> >> >> >> Read Matroska-Users on GMane:
>> >> >> >> >> http://dir.gmane.org/gmane.comp.multimedia.matroska.user
>> >> >> >> >
>> >> >> >> >
>> >> >> >> > _______________________________________________
>> >> >> >> > Matroska-users mailing list
>> >> >> >> > Matroska-users at lists.matroska.org
>> >> >> >> >
>> >> >> >> > http://lists.matroska.org/cgi-bin/mailman/listinfo/matroska-users
>> >> >> >> > Read Matroska-Users on GMane:
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>> >> >> >> >
>> >> >> >> >
>> >> >> >> _______________________________________________
>> >> >> >> Matroska-users mailing list
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>> >> >> >
>> >> >> >
>> >> >> > _______________________________________________
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>> >> >> >
>> >> >> >
>> >> >> _______________________________________________
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>> >> >
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>> >> >
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>> >
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>
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