[AXIS2C-1664] Memory leak when replacing value of item in hash table

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.7.0
• Fix Version/s: 1.7.0
• Component/s: core/transport
• Environment: Windows 7
• Assignee: Unassigned
• Reporter: Seth McCarus
• Created: 21/Feb/14 16:36
• Updated: 07/Apr/20 19:36

Description

axis2_libcurl_send() in axis2c\src\core\transport\http\sender\libcurl\axis2_libcurl.c has this call:

axis2_transport_in_desc_add_param(transport_in, env, param_expose_http_headers);

this has the effect of replacing the existing "exposeHeaders" parameter in the http transport_in object with a new parameter of the same name. axis2_transport_in_desc_add_param() calls axutil_param_container_add_param(), which calls axutil_hash_set() to replace the param in the hash table. axutil_hash_set has this code:

/* replace entry */
(*hep)->val = val;
/* check that the collision rate isn't too high */
if(ht->count > ht->max)

{ axutil_hash_expand_array(ht); }

however the original "val" is not freed, so the existing parameter is leaked. the proper fix would be to delete val before replacing it, but I'm not sure how that could be done (in my limited knowledge of Axis). my fix was to delete the exposeHeaders param in axis2_transport_in_desc_add_param by calling axutil_param_container_delete_param before calling axutil_param_container_add_param, but this fixes only the specific case, and not other cases of hash table leaks.

This was observed in v1.7.0.

Issue Links

• blocks: AXIS2C-1681 Apache Axis2C Roadmap 1.7 Planning
• relates to: AXIS2C-1591 axiom_element_add_attribute and duplicate names