8204667: Resources not freed on exception

Reviewed-by: skoivu, chegar

src/solaris/native/java/net/NetworkInterface.c

@@ -365,7 +365,9 @@ JNIEXPORT jobject JNICALL Java_java_net_NetworkInterface_getByInetAddress0
                     int address1 = htonl(
                         ((struct sockaddr_in *)addrP->addr)->sin_addr.s_addr);
                     int address2 = getInetAddress_addr(env, iaObj);
-                    JNU_CHECK_EXCEPTION_RETURN(env, NULL);
+                    if ((*env)->ExceptionCheck(env)) {
+                        goto cleanup;
+                    }
                     if (address1 == address2) {
                         match = JNI_TRUE;
                         break;
@@ -410,6 +412,7 @@ JNIEXPORT jobject JNICALL Java_java_net_NetworkInterface_getByInetAddress0
         obj = createNetworkInterface(env, curr);
     }
 
+cleanup:
     // release the interface list
     freeif(ifs);
 

src/windows/native/java/net/NetworkInterface.c

@@ -287,6 +287,7 @@ int enumInterfaces(JNIEnv *env, netif **netifPP)
             if (curr->name == NULL || curr->displayName == NULL) {
                 if (curr->name) free(curr->name);
                 if (curr->displayName) free(curr->displayName);
+                free(curr);
                 curr = NULL;
             }
         }
@@ -593,7 +594,10 @@ jobject createNetworkInterface
             /* default ctor will set family to AF_INET */
 
             setInetAddress_addr(env, iaObj, ntohl(addrs->addr.him4.sin_addr.s_addr));
-            JNU_CHECK_EXCEPTION_RETURN(env, NULL);
+            if ((*env)->ExceptionCheck(env)) {
+                free_netaddr(netaddrP);
+                return NULL;
+            }
             if (addrs->mask != -1) {
               ibObj = (*env)->NewObject(env, ni_ibcls, ni_ibctrID);
               if (ibObj == NULL) {
@@ -607,7 +611,10 @@ jobject createNetworkInterface
                 return NULL;
               }
               setInetAddress_addr(env, ia2Obj, ntohl(addrs->brdcast.him4.sin_addr.s_addr));
-              JNU_CHECK_EXCEPTION_RETURN(env, NULL);
+              if ((*env)->ExceptionCheck(env)) {
+                  free_netaddr(netaddrP);
+                  return NULL;
+              }
               (*env)->SetObjectField(env, ibObj, ni_ibbroadcastID, ia2Obj);
               (*env)->SetShortField(env, ibObj, ni_ibmaskID, addrs->mask);
               (*env)->SetObjectArrayElement(env, bindsArr, bind_index++, ibObj);
@@ -618,6 +625,7 @@ jobject createNetworkInterface
             if (iaObj) {
                 int ret = setInet6Address_ipaddress(env, iaObj,  (jbyte *)&(addrs->addr.him6.sin6_addr.s6_addr));
                 if (ret == JNI_FALSE) {
+                    free_netaddr(netaddrP);
                     return NULL;
                 }
 

src/windows/native/java/net/NetworkInterface_winXP.c

@@ -488,8 +488,9 @@ static jobject createNetworkInterfaceXP(JNIEnv *env, netif *ifs)
     jobjectArray addrArr, bindsArr, childArr;
     netaddr *addrs;
     jint addr_index;
-    int netaddrCount=ifs->naddrs;
-    netaddr *netaddrP=ifs->addrs;
+    int netaddrCount = ifs->naddrs;
+    netaddr *netaddrP = ifs->addrs;
+    netaddr *netaddrPToFree = NULL;
     jint bind_index;
 
     /*
@@ -520,21 +521,23 @@ static jobject createNetworkInterfaceXP(JNIEnv *env, netif *ifs)
      * Note that 0 is a valid number of addresses.
      */
     if (netaddrCount < 0) {
-        netaddrCount = enumAddresses_win(env, ifs, &netaddrP);
+        netaddrCount = enumAddresses_win(env, ifs, &netaddrPToFree);
         if (netaddrCount == -1) {
             return NULL;
         }
+        netaddrP = netaddrPToFree;
     }
 
     addrArr = (*env)->NewObjectArray(env, netaddrCount, ia_class, NULL);
     if (addrArr == NULL) {
+        free_netaddr(netaddrPToFree);
         return NULL;
     }
 
     bindsArr = (*env)->NewObjectArray(env, netaddrCount, ni_ibcls, NULL);
     if (bindsArr == NULL) {
-      free_netaddr(netaddrP);
-      return NULL;
+        free_netaddr(netaddrPToFree);
+        return NULL;
     }
 
     addrs = netaddrP;
@@ -546,26 +549,32 @@ static jobject createNetworkInterfaceXP(JNIEnv *env, netif *ifs)
         if (addrs->addr.him.sa_family == AF_INET) {
             iaObj = (*env)->NewObject(env, ia4_class, ia4_ctrID);
             if (iaObj == NULL) {
+                free_netaddr(netaddrPToFree);
                 return NULL;
             }
             /* default ctor will set family to AF_INET */
 
             setInetAddress_addr(env, iaObj, ntohl(addrs->addr.him4.sin_addr.s_addr));
-
-            JNU_CHECK_EXCEPTION_RETURN(env, NULL);
+            if ((*env)->ExceptionCheck(env)) {
+                free_netaddr(netaddrPToFree);
+                return NULL;
+            }
             ibObj = (*env)->NewObject(env, ni_ibcls, ni_ibctrID);
             if (ibObj == NULL) {
-              free_netaddr(netaddrP);
-              return NULL;
+                free_netaddr(netaddrPToFree);
+                return NULL;
             }
             (*env)->SetObjectField(env, ibObj, ni_ibaddressID, iaObj);
             ia2Obj = (*env)->NewObject(env, ia4_class, ia4_ctrID);
             if (ia2Obj == NULL) {
-              free_netaddr(netaddrP);
-              return NULL;
+                free_netaddr(netaddrPToFree);
+                return NULL;
             }
             setInetAddress_addr(env, ia2Obj, ntohl(addrs->brdcast.him4.sin_addr.s_addr));
-            JNU_CHECK_EXCEPTION_RETURN(env, NULL);
+            if ((*env)->ExceptionCheck(env)) {
+                free_netaddr(netaddrPToFree);
+                return NULL;
+            }
             (*env)->SetObjectField(env, ibObj, ni_ibbroadcastID, ia2Obj);
             (*env)->SetShortField(env, ibObj, ni_ibmaskID, addrs->mask);
             (*env)->SetObjectArrayElement(env, bindsArr, bind_index++, ibObj);
@@ -574,10 +583,12 @@ static jobject createNetworkInterfaceXP(JNIEnv *env, netif *ifs)
             int ret;
             iaObj = (*env)->NewObject(env, ia6_class, ia6_ctrID);
             if (iaObj == NULL) {
+                free_netaddr(netaddrPToFree);
                 return NULL;
             }
             ret = setInet6Address_ipaddress(env, iaObj, (jbyte *)&(addrs->addr.him6.sin6_addr.s6_addr));
             if (ret == JNI_FALSE) {
+                free_netaddr(netaddrPToFree);
                 return NULL;
             }
             scope = addrs->addr.him6.sin6_scope_id;
@@ -587,8 +598,8 @@ static jobject createNetworkInterfaceXP(JNIEnv *env, netif *ifs)
             }
             ibObj = (*env)->NewObject(env, ni_ibcls, ni_ibctrID);
             if (ibObj == NULL) {
-              free_netaddr(netaddrP);
-              return NULL;
+                free_netaddr(netaddrPToFree);
+                return NULL;
             }
             (*env)->SetObjectField(env, ibObj, ni_ibaddressID, iaObj);
             (*env)->SetShortField(env, ibObj, ni_ibmaskID, addrs->mask);
@@ -601,6 +612,8 @@ static jobject createNetworkInterfaceXP(JNIEnv *env, netif *ifs)
     (*env)->SetObjectField(env, netifObj, ni_addrsID, addrArr);
     (*env)->SetObjectField(env, netifObj, ni_bindsID, bindsArr);
 
+    free_netaddr(netaddrPToFree);
+
     /*
      * Windows doesn't have virtual interfaces, so child array
      * is always empty.
@@ -640,7 +653,7 @@ JNIEXPORT jobject JNICALL Java_java_net_NetworkInterface_getByName0_XP
     }
 
     /* if found create a NetworkInterface */
-    if (curr != NULL) {;
+    if (curr != NULL) {
         netifObj = createNetworkInterfaceXP(env, curr);
     }
 
@@ -767,6 +780,7 @@ JNIEXPORT jobjectArray JNICALL Java_java_net_NetworkInterface_getAll_XP
     /* allocate a NetworkInterface array */
     netIFArr = (*env)->NewObjectArray(env, count, cls, NULL);
     if (netIFArr == NULL) {
+        free_netif(ifList);
         return NULL;
     }
 
@@ -781,6 +795,7 @@ JNIEXPORT jobjectArray JNICALL Java_java_net_NetworkInterface_getAll_XP
 
         netifObj = createNetworkInterfaceXP(env, curr);
         if (netifObj == NULL) {
+            free_netif(ifList);
             return NULL;
         }
 

src/windows/native/java/net/TwoStacksPlainDatagramSocketImpl.c

@@ -445,7 +445,6 @@ Java_java_net_TwoStacksPlainDatagramSocketImpl_bind0(JNIEnv *env, jobject this,
                         "Protocol family not supported");
         return;
     }
-    JNU_CHECK_EXCEPTION(env);
     if (IS_NULL(fdObj) || (ipv6_supported && IS_NULL(fd1Obj))) {
         JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "socket closed");
         return;