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Code Issues 1 Projects Releases Wiki Activity

typefindfunctions: Increase xml typefinder closing brace limit

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If the first XML element in a DASH manifest has its closing brance
beyond the first 512 bytes (because of, e.g. lots of attributes),
the MPD typefinder fails. Try to read a larger block, and then
smaller blocks until 512 bytes.

Fixes https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/2385

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4302>
This commit is contained in:
Ilie Halip 2023-03-18 11:54:15 +02:00 committed by GStreamer Marge Bot
parent d2678a1f54
commit 476a8aca78
1 changed files with 8 additions and 6 deletions
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14
subprojects/gst-plugins-base/gst/typefind/gsttypefindfunctions.c
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@ -660,15 +660,17 @@ xml_check_first_element (GstTypeFind * tf, const gchar * element, guint elen,
length = gst_type_find_get_length (tf);
/* try a default that should be enough */
if (length == 0)
length = 512;
else if (length < 32)
if (length == 0) {
length = 4096;
while (!(data = gst_type_find_peek (tf, 0, length)) && length >= 512)
length /= 2;
} else if (length < 32) {
return FALSE;
else /* the first few bytes should be enough */
} else { /* the first few bytes should be enough */
length = MIN (4096, length);
data = gst_type_find_peek (tf, 0, length);
}
data = gst_type_find_peek (tf, 0, length);
if (!data)
return FALSE;