Return-Path: From: Andrei Emeltchenko To: linux-bluetooth@vger.kernel.org Subject: [PATCHv2 6/6] gdbus: Fix use after free Date: Fri, 1 Aug 2014 11:29:12 +0300 Message-Id: <1406881752-24897-6-git-send-email-Andrei.Emeltchenko.news@gmail.com> In-Reply-To: <1406881752-24897-1-git-send-email-Andrei.Emeltchenko.news@gmail.com> References: <1406881752-24897-1-git-send-email-Andrei.Emeltchenko.news@gmail.com> Sender: linux-bluetooth-owner@vger.kernel.org List-ID: From: Andrei Emeltchenko Refactor filter_data_remove_callback so that we do not iterate over freed pointer. --- gdbus/watch.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/gdbus/watch.c b/gdbus/watch.c index 0f99f4f..e18ca1f 100644 --- a/gdbus/watch.c +++ b/gdbus/watch.c @@ -362,6 +362,7 @@ static void service_data_free(struct service_data *data) callback->data = NULL; } +/* Returns TRUE if data is freed */ static gboolean filter_data_remove_callback(struct filter_data *data, struct filter_callback *cb) { @@ -383,7 +384,7 @@ static gboolean filter_data_remove_callback(struct filter_data *data, /* Don't remove the filter if other callbacks exist or data is lock * processing callbacks */ if (data->callbacks || data->lock) - return TRUE; + return FALSE; if (data->registered && !remove_match(data)) return FALSE; @@ -405,7 +406,9 @@ static DBusHandlerResult signal_filter(DBusConnection *connection, if (cb->signal_func && !cb->signal_func(connection, message, cb->user_data)) { - filter_data_remove_callback(data, cb); + if (filter_data_remove_callback(data, cb)) + break; + continue; } @@ -489,7 +492,9 @@ static DBusHandlerResult service_filter(DBusConnection *connection, /* Only auto remove if it is a bus name watch */ if (data->argument[0] == ':' && (cb->conn_func == NULL || cb->disc_func == NULL)) { - filter_data_remove_callback(data, cb); + if(filter_data_remove_callback(data, cb)) + break; + continue; } -- 1.9.1