[PATCH 2/3] Fix numbers GSlist to be used in new missed calls

[Dmitriy Paliy <dmitriy.paliy@nokia.com>]

It is possible that phonebook_pull_read is invoked several times
submitting multiple pull requests without closing PBAP object. E.g. when
maxlistcount value is small and size of call history is large enough.

The result is possibility of different data structures (gstring and
contact_data) to be mixed in a single GSlist that may lead to undefined
behaviour.
---
 plugins/phonebook-tracker.c |   17 ++++++++++++-----
 1 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/plugins/phonebook-tracker.c b/plugins/phonebook-tracker.c
index 9c60ec3..52ed31b 100644
--- a/plugins/phonebook-tracker.c
+++ b/plugins/phonebook-tracker.c
@@ -948,6 +948,7 @@ struct phonebook_data {
 	gboolean vcardentry;
 	const struct apparam_field *params;
 	GSList *contacts;
+	GSList *numbers;
 	phonebook_cache_ready_cb ready_cb;
 	phonebook_entry_cb entry_cb;
 	int newmissedcalls;
@@ -1923,6 +1924,13 @@ static void gstring_free_helper(gpointer data, gpointer user_data)
 	g_string_free(data, TRUE);
 }
 
+static void free_data_numbers(struct phonebook_data *data)
+{
+	g_slist_foreach(data->numbers, gstring_free_helper, NULL);
+	g_slist_free(data->numbers);
+	data->numbers = NULL;
+}
+
 static int pull_newmissedcalls(const char **reply, int num_fields,
 							void *user_data)
 {
@@ -1934,12 +1942,12 @@ static int pull_newmissedcalls(const char **reply, int num_fields,
 	if (num_fields < 0 || reply == NULL)
 		goto done;
 
-	if (!find_checked_number(data->contacts, reply[1])) {
+	if (!find_checked_number(data->numbers, reply[1])) {
 		if (g_strcmp0(reply[2], "false") == 0)
 			data->newmissedcalls++;
 		else {
 			GString *number = g_string_new(reply[1]);
-			data->contacts = g_slist_append(data->contacts,
+			data->numbers = g_slist_append(data->numbers,
 								number);
 		}
 	}
@@ -1947,9 +1955,7 @@ static int pull_newmissedcalls(const char **reply, int num_fields,
 
 done:
 	DBG("newmissedcalls %d", data->newmissedcalls);
-	g_slist_foreach(data->contacts, gstring_free_helper, NULL);
-	g_slist_free(data->contacts);
-	data->contacts = NULL;
+	free_data_numbers(data);
 
 	if (num_fields < 0) {
 		data->cb(NULL, 0, num_fields, 0, TRUE, data->user_data);
@@ -1991,6 +1997,7 @@ void phonebook_req_finalize(void *request)
 		g_object_unref(data->query_canc);
 	}
 
+	free_data_numbers(data);
 	free_data_contacts(data);
 	g_free(data->req_name);
 	g_free(data);
-- 
1.7.4.1