leak of socket in netsnmp_unix_transport() function

[leeriorio]

Hello! In result of static analyse of net-snmp sources with Svace static analyzer I found minor error of cathegory "HANDLE_LEAK", which means that there is potential error with memory usage. There is creation of socket:

net-snmp/snmplib/transports/snmpUnixDomain.c

Line 353 in b3163b3

 t->sock = socket(PF_UNIX, SOCK_STREAM, 0); 

then, if we run unstructions in lines 363-364 below

net-snmp/snmplib/transports/snmpUnixDomain.c

Lines 364 to 366 in b3163b3

 if (t->local == NULL) { 
     netsnmp_transport_free(t); 
     return NULL; 

but calling netsnmp_transport_free() won't clear memory in t->sock, isn't it?

net-snmp/snmplib/snmp_transport.c

Lines 230 to 248 in b3163b3

 void 
 netsnmp_transport_free(netsnmp_transport *t) 
 { 
     if (NULL == t) 
         return; 
  
 #ifndef FEATURE_REMOVE_TRANSPORT_CACHE 
     /** don't free a transport that is currently shared */ 
     if (netsnmp_transport_cache_remove(t) == 1) 
         return; 
 #endif 
  
     SNMP_FREE(t->local); 
     SNMP_FREE(t->remote); 
     SNMP_FREE(t->data); 
     netsnmp_transport_free(t->base_transport); 
  
     SNMP_FREE(t); 
 } 

Found by Linux Verification Center (portal.linuxtesting.ru) with SVACE.
Author E.Zilotina.