Avoid crash while receiving an misformated FU header.

src/voip/h265-nal-unpacker.cpp

@@ -54,10 +54,7 @@ mblk_t *H265NalUnpacker::FuAggregator::feed(mblk_t *packet) {
 	}
 
 	if (fuHeader.getPosition() == H265FuHeader::Position::End) {
-		mblk_t *m = _m;
-		msgpullup(m, -1);
-		_m = nullptr;
-		return m;
+		return completeAggregation();
 	} else return nullptr;
 }
 
@@ -67,7 +64,9 @@ void H265NalUnpacker::FuAggregator::reset() {
 }
 
 mblk_t *H265NalUnpacker::FuAggregator::completeAggregation() {
+	if (!isAggregating()) return nullptr;
 	mblk_t *res = _m;
+	msgpullup(res, -1);
 	_m = nullptr;
 	return res;
 }

src/voip/nal-unpacker.cpp

@@ -18,7 +18,10 @@
 */
 
 #include <bitset>
+#include <stdexcept>
+
 #include "mediastreamer2/msqueue.h"
+
 #include "nal-unpacker.h"
 
 using namespace std;
@@ -87,9 +90,15 @@ NalUnpacker::Status NalUnpacker::unpack(mblk_t *im, MSQueue *out) {
 			storeNal(im);
 			break;
 		case PacketType::FragmentationUnit: {
-			ms_debug("Receiving FU-A");
-			mblk_t *o = _fuAggregator->feed(im);
-			if (o) storeNal(o);
+			try {
+				ms_debug("Receiving FU-A");
+				mblk_t *o = _fuAggregator->feed(im);
+				if (o) storeNal(o);
+			} catch (const invalid_argument &e) {
+				ms_error("%s", e.what());
+				_fuAggregator->reset();
+				_status.frameCorrupted = true;
+			}
 			break;
 		}
 		case PacketType::AggregationPacket: