Hi,
I do not know if anyone supports these sources any more but I found a memleak in
UCD-SNMP 4.2.5 yesterday.
It is a special case but it eats up memory very quickly:
If there is an SNMPv1 GET-Request which contains multiple OIDs
AND there are unknown OIDs in it
AND there are known OIDs before the first unknown which are handled by an
agentx-subagent
the agent allocates agentx-request with cb_data and a pdu but only the requests
are getting freed.
The problem lies in handle_next_pass in snmp_agent.c, if handle_var_list returns
an error and there are outstanding requests.
I also checked 4.2.6 and the code is the same.
Here is the code-part (starting at line 787 in snmp_agent.c, version 4.2.6)
else {
/* discard outstanding requests */
for ( req_p = asp->outstanding_requests ;
req_p != NULL ; req_p = next_req ) {
next_req = req_p->next_request;
free( req_p );
}
after changing it to
else {
/* discard outstanding requests */
for ( req_p = asp->outstanding_requests ;
req_p != NULL ; req_p = next_req ) {
next_req = req_p->next_request;
if(req_p->pdu)
{
snmp_free_pdu(req_p->pdu);
}
if(req_p->cb_data)
{
free(req_p->cb_data);
}
free( req_p );
}
the agent no longer eats up memory.
greetings
Wolfgang Pedot
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