Axis2/C AXIOM libxml2 parser frees the IO context before calling the
AXIS2_CLOSE_INPUT_CALLBACK
-----------------------------------------------------------------------------------------------
Key: AXIS2C-1222
URL: https://issues.apache.org/jira/browse/AXIS2C-1222
Project: Axis2-C
Issue Type: Bug
Components: xml/parser
Affects Versions: 1.4.0
Environment: Linux/Unix with libxml2 parser
Reporter: Chris Rose
Running under valgrind, I get this invalid read error:
==21882== Invalid read of size 4
==21882== at 0x43F6F69: axiom_close_gstream (axis2c_util.c:246)
==21882== by 0x44F418F: axis2_libxml2_reader_wrapper_close_input_callback
(libxml2_reader_wrapper.c:964)
==21882== by 0x451BD8C: xmlFreeParserInputBuffer (xmlIO.c:2307)
==21882== by 0x4571E6A: xmlTextReaderClose (xmlreader.c:2255)
==21882== by 0x44F381C: axis2_libxml2_reader_wrapper_free
(libxml2_reader_wrapper.c:505)
==21882== by 0x44F2686: axiom_xml_reader_free (xml_reader.c:34)
==21882== by 0x444F914: axiom_stax_builder_free (om_stax_builder.c:909)
==21882== by 0x43F6D65: Axis2_axiom_deserialize_buffer (axis2c_util.c:152)
==21882== by 0x43F6820: Axis2c_cmd_svc_client (axis2c.c:419)
==21882== by 0x402EA62: TclEvalObjvInternal (tclBasic.c:3084)
==21882== by 0x402F56B: Tcl_EvalEx (tclBasic.c:3674)
==21882== by 0x4083D91: Tcl_FSEvalFile (tclIOUtil.c:1651)
==21882== Address 0x47616F0 is 0 bytes inside a block of size 56 free'd
==21882== at 0x400513F: free (vg_replace_malloc.c:233)
==21882== by 0x441AEA3: axutil_allocator_free_impl (allocator.c:91)
==21882== by 0x44F3804: axis2_libxml2_reader_wrapper_free
(libxml2_reader_wrapper.c:500)
==21882== by 0x44F2686: axiom_xml_reader_free (xml_reader.c:34)
==21882== by 0x444F914: axiom_stax_builder_free (om_stax_builder.c:909)
==21882== by 0x43F6D65: Axis2_axiom_deserialize_buffer (axis2c_util.c:152)
==21882== by 0x43F6820: Axis2c_cmd_svc_client (axis2c.c:419)
==21882== by 0x402EA62: TclEvalObjvInternal (tclBasic.c:3084)
==21882== by 0x402F56B: Tcl_EvalEx (tclBasic.c:3674)
==21882== by 0x4083D91: Tcl_FSEvalFile (tclIOUtil.c:1651)
==21882== by 0x408C036: Tcl_Main (tclMain.c:292)
==21882== by 0x80486B3: main (in /home/rosec/install/fc/bin/tclsh8.4)
>From this I can see that in the libxml2 reader wrapper code, the context of
>the parser -- provided when the IO parser was created -- is freed before the
>close callback is invoked by calling xmlFreeTextReader. This is an error in
>this instance, because the context handle cannot simply be free()d, in our
>application it requires specific destructor work to occur. This might be a
>lack of undestanding of the purpose of the close callback, but it's clear that
>AXIS2_FREE is invoked on the context handle before the close callback is
>invoked.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
