[mythtv-commits] Ticket #9005: mythbackend segfault

[MythTV]

#9005: mythbackend segfault
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 Reporter:  Free Denizen <freedenizen@…>          |           Owner:  beirdo    
     Type:  defect                                |          Status:  assigned  
 Priority:  minor                                 |       Milestone:  unknown   
Component:  MythTV - General                      |         Version:  Trunk Head
 Severity:  medium                                |      Resolution:            
 Keywords:                                        |   Ticket locked:  0         
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Description changed by beirdo:

Old description:

> I'm not sure of the trigger for the crash, it seems to happen randomly,
> but it does not occur when running under gdb. Attaching backtrace from a
> core dump.  Running trunk rev 26497
> The only thing I see in the logs are:
> *** glibc detected *** /usr/local/bin/mythbackend: corrupted double-
> linked list: 0xa5e19e10 ***
> ======= Backtrace: =========
> /lib/libc.so.6(+0x6c534)[0xb49e6534]
> /lib/libc.so.6(+0x6ca92)[0xb49e6a92]
> /lib/libc.so.6(+0x6eab6)[0xb49e8ab6]
> /lib/libc.so.6(__libc_malloc+0x5e)[0xb49eae5e]
> /usr/lib/qt4/libQtCore.so.4(_Z7qMallocj+0x1e)[0xb4d46634]
> /usr/lib/qt4/libQtCore.so.4(_ZN7QString17fromLatin1_helperEPKci+0x3f)[0xb4d91689]
> /usr/lib/qt4/libQtCore.so.4(_ZN7QString16fromAscii_helperEPKci+0xd9)[0xb4d9833b]
> /usr/local/bin/mythbackend(_ZN7QStringC1EPKc+0x19)[0x807f317]
> /usr/local/lib/libmythupnp-0.24.so.0(_ZN4SSDP11ProcessDataEP13MSocketDevice+0xcb)[0xb6934741]
> /usr/local/lib/libmythupnp-0.24.so.0(_ZN4SSDP3runEv+0x1ea)[0xb69356a8]
> /usr/lib/qt4/libQtCore.so.4(+0x637b5)[0xb4d4b7b5]
> /lib/libpthread.so.0(+0x666f)[0xb4be266f]
> /lib/libc.so.6(clone+0x5e)[0xb4a4b95e]
>
> Followed by the memory map, please let me know if that would be useful to
> attach.  I'm also seeing previewgen segfaulting as well.  It is possible
> that this is just an error on my machine but if so I've been unable to
> locate the cause.

New description:

 I'm not sure of the trigger for the crash, it seems to happen randomly,
 but it does not occur when running under gdb. Attaching backtrace from a
 core dump.  Running trunk rev 26497
 The only thing I see in the logs are:
 {{{
 *** glibc detected *** /usr/local/bin/mythbackend: corrupted double-linked
 list: 0xa5e19e10 ***
 ======= Backtrace: =========
 /lib/libc.so.6(+0x6c534)[0xb49e6534]
 /lib/libc.so.6(+0x6ca92)[0xb49e6a92]
 /lib/libc.so.6(+0x6eab6)[0xb49e8ab6]
 /lib/libc.so.6(__libc_malloc+0x5e)[0xb49eae5e]
 /usr/lib/qt4/libQtCore.so.4(_Z7qMallocj+0x1e)[0xb4d46634]
 /usr/lib/qt4/libQtCore.so.4(_ZN7QString17fromLatin1_helperEPKci+0x3f)[0xb4d91689]
 /usr/lib/qt4/libQtCore.so.4(_ZN7QString16fromAscii_helperEPKci+0xd9)[0xb4d9833b]
 /usr/local/bin/mythbackend(_ZN7QStringC1EPKc+0x19)[0x807f317]
 /usr/local/lib/libmythupnp-0.24.so.0(_ZN4SSDP11ProcessDataEP13MSocketDevice+0xcb)[0xb6934741]
 /usr/local/lib/libmythupnp-0.24.so.0(_ZN4SSDP3runEv+0x1ea)[0xb69356a8]
 /usr/lib/qt4/libQtCore.so.4(+0x637b5)[0xb4d4b7b5]
 /lib/libpthread.so.0(+0x666f)[0xb4be266f]
 /lib/libc.so.6(clone+0x5e)[0xb4a4b95e]
 }}}

 Followed by the memory map, please let me know if that would be useful to
 attach.  I'm also seeing previewgen segfaulting as well.  It is possible
 that this is just an error on my machine but if so I've been unable to
 locate the cause.

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Ticket URL: <http://svn.mythtv.org/trac/ticket/9005#comment:2>
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