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729738 - net-snmp dumps core in netsnmp_oid_find_prefix
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commit f9304c83f76202db0e684269ca1af32e43cd9db4
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Author: Jan Safranek <jsafranek@users.sourceforge.net>
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Date: Tue Feb 7 14:53:44 2012 +0100
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CHANGES: PATCH 1633670: fixed snmpd crashing when an AgentX subagent disconnect in the middle of processing of a request.
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I fixed also the memory leak reported in the tracker comments.
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diff --git a/agent/mibgroup/agentx/master.c b/agent/mibgroup/agentx/master.c
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index c42a42a..baeebaf 100644
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--- a/agent/mibgroup/agentx/master.c
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+++ b/agent/mibgroup/agentx/master.c
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@@ -219,6 +219,9 @@ agentx_got_response(int operation,
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if (!cache) {
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DEBUGMSGTL(("agentx/master", "response too late on session %8p\n",
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session));
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+ /* response is too late, free the cache */
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+ if (magic)
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+ netsnmp_free_delegated_cache((netsnmp_delegated_cache*) magic);
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return 0;
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}
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requests = cache->requests;
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@@ -606,6 +609,8 @@ agentx_master_handler(netsnmp_mib_handler *handler,
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result = snmp_async_send(ax_session, pdu, agentx_got_response, cb_data);
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if (result == 0) {
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snmp_free_pdu(pdu);
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+ if (cb_data)
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+ netsnmp_free_delegated_cache((netsnmp_delegated_cache*) cb_data);
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}
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return SNMP_ERR_NOERROR;
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diff --git a/agent/mibgroup/agentx/master_admin.c b/agent/mibgroup/agentx/master_admin.c
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index f16f392..b84b85e 100644
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--- a/agent/mibgroup/agentx/master_admin.c
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+++ b/agent/mibgroup/agentx/master_admin.c
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@@ -133,11 +133,16 @@ close_agentx_session(netsnmp_session * session, int sessid)
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* requests, so that the delegated request will be completed and
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* further requests can be processed
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*/
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- netsnmp_remove_delegated_requests_for_session(session);
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+ while (netsnmp_remove_delegated_requests_for_session(session)) {
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+ DEBUGMSGTL(("agentx/master", "Continue removing delegated reqests\n"));
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+ }
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+
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if (session->subsession != NULL) {
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netsnmp_session *subsession = session->subsession;
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for(; subsession; subsession = subsession->next) {
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- netsnmp_remove_delegated_requests_for_session(subsession);
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+ while (netsnmp_remove_delegated_requests_for_session(subsession)) {
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+ DEBUGMSGTL(("agentx/master", "Continue removing delegated subsession reqests\n"));
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+ }
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}
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}
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