[master] wrong dlopen filename caused segfault

3878.	[bug]		Using the incorrect filename for a DLZ module
			caused a segmentation fault on startup. [RT #36286]

CHANGES

+3878.	[bug]		Using the incorrect filename for a DLZ module
+			caused a segmentation fault on startup. [RT #36286]
+
 3877.	[bug]		Inserting and deleting parent and child nodes
 			in response policy zones could trigger an assertion
 			failure. [RT #36272]

bin/named/unix/dlz_dlopen_driver.c

@@ -245,11 +245,13 @@ dlopen_dlz_create(const char *dlzname, unsigned int argc, char *argv[],
 
 	cd->dl_path = isc_mem_strdup(cd->mctx, argv[1]);
 	if (cd->dl_path == NULL) {
+		result = ISC_R_NOMEMORY;
 		goto failed;
 	}
 
 	cd->dlzname = isc_mem_strdup(cd->mctx, dlzname);
 	if (cd->dlzname == NULL) {
+		result = ISC_R_NOMEMORY;
 		goto failed;
 	}
 
@@ -279,6 +281,7 @@ dlopen_dlz_create(const char *dlzname, unsigned int argc, char *argv[],
 		dlopen_log(ISC_LOG_ERROR,
 			   "dlz_dlopen failed to open library '%s' - %s",
 			   cd->dl_path, dlerror());
+		result = ISC_R_FAILURE;
 		goto failed;
 	}
 
@@ -298,6 +301,7 @@ dlopen_dlz_create(const char *dlzname, unsigned int argc, char *argv[],
 	    cd->dlz_findzonedb == NULL)
 	{
 		/* We're missing a required symbol */
+		result = ISC_R_FAILURE;
 		goto failed;
 	}
 
@@ -379,7 +383,6 @@ failed:
 	return (result);
 }
 
-
 /*
  * Called when bind is shutting down
  */

bin/named/win32/dlz_dlopen_driver.c

@@ -244,11 +244,13 @@ dlopen_dlz_create(const char *dlzname, unsigned int argc, char *argv[],
 
 	cd->dl_path = isc_mem_strdup(cd->mctx, argv[1]);
 	if (cd->dl_path == NULL) {
+		result = ISC_R_NOMEMORY;
 		goto failed;
 	}
 
 	cd->dlzname = isc_mem_strdup(cd->mctx, dlzname);
 	if (cd->dlzname == NULL) {
+		result = ISC_R_NOMEMORY;
 		goto failed;
 	}
 
@@ -265,6 +267,7 @@ dlopen_dlz_create(const char *dlzname, unsigned int argc, char *argv[],
 		dlopen_log(ISC_LOG_ERROR,
 			   "dlz_dlopen failed to open library '%s' - %u",
 			   cd->dl_path, error);
+		result = ISC_R_FAILURE;
 		goto failed;
 	}
 
@@ -284,6 +287,7 @@ dlopen_dlz_create(const char *dlzname, unsigned int argc, char *argv[],
 	    cd->dlz_findzonedb == NULL)
 	{
 		/* We're missing a required symbol */
+		result = ISC_R_FAILURE;
 		goto failed;
 	}