Fix more memory leaks

This patch adds to what was fixed in r366880.  Specifically, it addresses the
following:

* chan_sip:   dispose of an allocated frame in off nominal code paths in
              sip_rtp_read
* func_odbc:  when disposing of an allocated resultset, ensure that any rows
              that were appended to that resultset are also disposed of
* cli:        free the created return string buffer in another off nominal code
              path
* chan_dahdi: free a frame that was allocated by the dsp layer if we choose
              not to process that frame

(issue ASTERISK-19665)
Reported by: Matt Jordan

Review: https://reviewboard.asterisk.org/r/1922/
........

Merged revisions 366944 from http://svn.asterisk.org/svn/asterisk/branches/1.8
........

Merged revisions 366948 from http://svn.asterisk.org/svn/asterisk/branches/10


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@366955 65c4cc65-6c06-0410-ace0-fbb531ad65f3

1 files changed, 10 insertions, 5 deletions

diff --git a/funcs/func_odbc.c b/funcs/func_odbc.c
index 72a87cc0b..5b24878a6 100644
--- a/funcs/func_odbc.c
+++ b/funcs/func_odbc.c
@@ -151,6 +151,11 @@ static void odbc_datastore_free(void *data)
 {
 	struct odbc_datastore *result = data;
 	struct odbc_datastore_row *row;
+
+	if (!result) {
+		return;
+	}
+
 	AST_LIST_LOCK(result);
 	while ((row = AST_LIST_REMOVE_HEAD(result, list))) {
 		ast_free(row);
@@ -539,7 +544,7 @@ static int acf_odbc_read(struct ast_channel *chan, const char *cmd, char *s, cha
 			pbx_builtin_setvar_helper(chan, "ODBCROWS", rowcount);
 			ast_autoservice_stop(chan);
 		}
-		ast_free(resultset);
+		odbc_datastore_free(resultset);
 		return -1;
 	}
 
@@ -554,7 +559,7 @@ static int acf_odbc_read(struct ast_channel *chan, const char *cmd, char *s, cha
 			pbx_builtin_setvar_helper(chan, "ODBCROWS", rowcount);
 			ast_autoservice_stop(chan);
 		}
-		ast_free(resultset);
+		odbc_datastore_free(resultset);
 		return -1;
 	}
 
@@ -580,7 +585,7 @@ static int acf_odbc_read(struct ast_channel *chan, const char *cmd, char *s, cha
 			pbx_builtin_setvar_helper(chan, "ODBCSTATUS", status);
 			ast_autoservice_stop(chan);
 		}
-		ast_free(resultset);
+		odbc_datastore_free(resultset);
 		return res1;
 	}
 
@@ -594,7 +599,7 @@ static int acf_odbc_read(struct ast_channel *chan, const char *cmd, char *s, cha
 			char *ptrcoldata;
 
 			if (!coldata) {
-				ast_free(resultset);
+				odbc_datastore_free(resultset);
 				SQLCloseCursor(stmt);
 				SQLFreeHandle(SQL_HANDLE_STMT, stmt);
 				ast_odbc_release_obj(obj);
@@ -627,7 +632,7 @@ static int acf_odbc_read(struct ast_channel *chan, const char *cmd, char *s, cha
 					void *tmp = ast_realloc(resultset, sizeof(*resultset) + ast_str_strlen(colnames) + 1);
 					if (!tmp) {
 						ast_log(LOG_ERROR, "No space for a new resultset?\n");
-						ast_free(resultset);
+						odbc_datastore_free(resultset);
 						SQLCloseCursor(stmt);
 						SQLFreeHandle(SQL_HANDLE_STMT, stmt);
 						ast_odbc_release_obj(obj);