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gst: Initialize optional event/message fields when parsing

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These might not exist inside the structure and then we would potentially
keep around uninitialized memory from the caller in the out parameter.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/887>
This commit is contained in:
Sebastian Dröge 2021-09-20 13:12:12 +03:00
parent 9289df4291
commit fea7f02a1d
2 changed files with 12 additions and 1 deletions
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11
gst/gstevent.c
View file

@ -863,6 +863,10 @@ gst_event_parse_gap_flags (GstEvent * event, GstGapFlags * flags)
g_return_if_fail (event != NULL);
g_return_if_fail (GST_EVENT_TYPE (event) == GST_EVENT_GAP);
/* Initialize to 0 for GAP events that don't have the field set */
if (flags)
*flags = 0;
gst_structure_id_get (GST_EVENT_STRUCTURE (event),
GST_QUARK (GAP_FLAGS), GST_TYPE_GAP_FLAGS, flags, NULL);
}
@ -1478,6 +1482,9 @@ gst_event_parse_seek_trickmode_interval (GstEvent * event,
g_return_if_fail (interval != NULL);
g_return_if_fail (GST_EVENT_TYPE (event) == GST_EVENT_SEEK);
if (interval)
*interval = GST_CLOCK_TIME_NONE;
gst_structure_id_get (GST_EVENT_STRUCTURE (event),
GST_QUARK (TRICKMODE_INTERVAL), GST_TYPE_CLOCK_TIME, interval, NULL);
}
@ -1814,10 +1821,10 @@ gst_event_parse_stream (GstEvent * event, GstStream ** stream)
g_return_if_fail (GST_EVENT_TYPE (event) == GST_EVENT_STREAM_START);
if (stream) {
*stream = NULL;
gst_structure_id_get (GST_EVENT_STRUCTURE (event),
GST_QUARK (STREAM), GST_TYPE_STREAM, stream, NULL);
}
}
/**
@ -1852,6 +1859,7 @@ gst_event_parse_stream_flags (GstEvent * event, GstStreamFlags * flags)
g_return_if_fail (GST_EVENT_TYPE (event) == GST_EVENT_STREAM_START);
if (flags) {
*flags = 0;
gst_structure_id_get (GST_EVENT_STRUCTURE (event),
GST_QUARK (FLAGS), GST_TYPE_STREAM_FLAGS, flags, NULL);
}
@ -1902,6 +1910,7 @@ gst_event_parse_group_id (GstEvent * event, guint * group_id)
FALSE);
if (group_id) {
*group_id = 0;
return gst_structure_id_get (GST_EVENT_STRUCTURE (event),
GST_QUARK (GROUP_ID), G_TYPE_UINT, group_id, NULL);
}

2
gst/gstmessage.c
View file

@ -2472,6 +2472,8 @@ gst_message_parse_group_id (GstMessage * message, guint * group_id)
if (!group_id)
return TRUE;
*group_id = 0;
structure = GST_MESSAGE_STRUCTURE (message);
v = gst_structure_id_get_value (structure, GST_QUARK (GROUP_ID));