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| author | Andrei Emeltchenko <andrei.emeltchenko@intel.com> | 2014-08-11 10:50:44 +0300 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2014-09-08 05:46:01 +0200 |
| commit | f8ff755b68a0af40176c528640add94452a71274 (patch) | |
| tree | 294b55e405a2399a25b0dbc8f8155e333fac4041 | |
| parent | d16f07a7c31c61bf637177f97948845333ce7c8e (diff) | |
| download | pacrunner-f8ff755b68a0af40176c528640add94452a71274.tar.gz | |
gdbus: Fix use after free
Refactor filter_data_remove_callback so that we do not iterate over
freed pointer.
| -rw-r--r-- | gdbus/watch.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/gdbus/watch.c b/gdbus/watch.c index 0f99f4f..474d3d4 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; } |