[Libevent-users] libevent (svn revision 651) segfaults on linux 2.6.12, ARM little endian architecture

[Frank Schaeckermann]

Yep... the build process actually pulled a completely fresh copy of 
libevent when compiling the transmission-daemon. I'll do some more 
debugging over the weekend. Maybe I can find out, where the rogue event 
is coming from.

Frank

Niels Provos provos-at-citi.umich.edu |libevent| wrote:
> Here is a silly question for you.   Did you you do a make clean after
> svn up?  There have also been some changes to the autoconf files in
> trunk that might require running autogen again.
>
> Niels.
>
> On Fri, Feb 22, 2008 at 1:54 AM, Frank Schaeckermann
> <6622n8e02 at sneakemail.com> wrote:
>   
>> I have installed transmission-daemon (a Bittorrent client) svn revision
>>  5051 on my Maxtor Shared Storage II (ARM little endian) with Linux
>>  2.6.12. Very soon after starting the daemon it segfaults.
>>
>>  I have re-compiled and re-installed transmission-daemon with debug
>>  information and ran it in gdb. The segfault happens in epoll.c line 217
>>  (libevent svn revision 651) in epoll_dispatch. Apparently an event comes
>>  in that does not have its data pointer set properly. I fixed the problem
>>  by adding a check for a valid data pointer before doing anything with it
>>  and now transmission does not segfault anymore.
>>
>>  But the event that is to be dispatched now does not do anything anymore.
>>  Which means I have cured the symptoms but not the cause. Somebody needs
>>  to figure out, why and from where invalid events get to epoll_dispatch.
>>  Or maybe it is okay if that happens, but then epoll.c needs to be
>>  patched accordingly.
>>
>>  If there is anything I can help with, please let me know!
>>
>>  Regards, Frank
>>
>>  P.S. I have already posted this in the transmissionbt forum but was
>>  asked by the developers to report it upstream to libevent as well.
>>
>>
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>>     
>
>