dvdspu: Make sure enough data is allocated for the available data

If the size read from the stream is smaller than the currently available
data then the size is bogus and the data should simply be discarded.

Fixes ZDI-CAN-20994
Fixes https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/2660

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4896>
This commit is contained in:
Sebastian Dröge 2023-06-13 14:23:47 +03:00 committed by GStreamer Marge Bot
parent 3144f63302
commit 7ed446dca9

View file

@ -593,6 +593,9 @@ parse_set_object_data (GstDVDSpu * dvdspu, guint8 type, guint8 * payload,
obj->rle_data_size = GST_READ_UINT24_BE (payload);
payload += 3;
if (end - payload > obj->rle_data_size)
return 0;
PGS_DUMP ("%d bytes of RLE data, of %d bytes total.\n",
(int) (end - payload), obj->rle_data_size);