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https://issues.apache.org/jira/browse/AXIS2C-1611?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alex Mantaut updated AXIS2C-1611:
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Attachment: axis2c_dep_engine_double_free.patch
Patch to solve the problem
> Seg fault if error on building conf
> -----------------------------------
>
> Key: AXIS2C-1611
> URL: https://issues.apache.org/jira/browse/AXIS2C-1611
> Project: Axis2-C
> Issue Type: Bug
> Components: core/engine
> Affects Versions: 1.6.0
> Environment: Linux
> Reporter: Alex Mantaut
> Labels: conf, core, dep_engine, patch
> Fix For: 1.7.0
>
> Attachments: axis2c_dep_engine_double_free.patch
>
> Original Estimate: 0.5h
> Remaining Estimate: 0.5h
>
> There is a segfault when an error ocurrs in creating conf.
>
> To reproduce the bug:
> - Install axis2c trunk, and compile samples
> - go to AXIS2C_HOME/lib and remove or move one of the libraries (cd
> $AXIS2C_HOME/lib &&sudo mv libaxis2_http_receiver.so.0.7.0
> libaxis2_http_receiver.so.0.7.0.1)
> - execute one of the samples (i.e. echo) it will segfault.
> Altough it is an error not beeing able to find an so, it should close
> gracefully, I think that this segfault may arise under other circumstances
> which cause conf building to fail...
> Examining the issue with valgrind it seems that there is a double freeing of
> dep_engine.
> dep_engine has a reference to conf and conf has a reference to dep_engine,
> and when it fails on creating conf, it deletes the conf (dep_engine.c:968)
> and when it exits the function tries to delete dep_engine again, which causes
> the segfault.
> The proposed solution is to set the dep_engine ptr from conf to NULL before
> deleting the conf.
> The proposed patch avoids the segfault, and doesn't leak memory in normal or
> error cases, please let me know if it is OK.
> Also I attach the valgrind analysis for the segfault (version prior applying
> the patch)
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