@@ -2655,6 +2655,21 @@ static int mov_read_stsc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
}
sc->stsc_count = i;
+ for (i = sc->stsc_count - 1; i < UINT_MAX; i--) {
+ if ((i+1 < sc->stsc_count && sc->stsc_data[i].first >= sc->stsc_data[i+1].first) ||
+ (i > 0 && sc->stsc_data[i].first <= sc->stsc_data[i-1].first) ||
+ sc->stsc_data[i].first < 1 ||
+ sc->stsc_data[i].count < 1 ||
+ sc->stsc_data[i].id < 1) {
+ av_log(c->fc, AV_LOG_WARNING, "STSC entry %d is invalid (first=%d count=%d id=%d)\n", i, sc->stsc_data[i].first, sc->stsc_data[i].count, sc->stsc_data[i].id);
+ if (i+1 >= sc->stsc_count || sc->stsc_data[i+1].first < 2)
+ return AVERROR_INVALIDDATA;
+ // We replace this entry by the next valid
+ sc->stsc_data[i].first = sc->stsc_data[i+1].first - 1;
+ sc->stsc_data[i].count = sc->stsc_data[i+1].count;
+ sc->stsc_data[i].id = sc->stsc_data[i+1].id;
+ }
+ }
if (pb->eof_reached) {
av_log(c->fc, AV_LOG_WARNING, "reached eof, corrupted STSC atom\n");
@@ -4144,6 +4159,11 @@ static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
st->index);
return 0;
}
+ if (sc->stsc_count && sc->stsc_data[ sc->stsc_count - 1 ].first > sc->chunk_count) {
+ av_log(c->fc, AV_LOG_ERROR, "stream %d, contradictionary STSC and STCO\n",
+ st->index);
+ return AVERROR_INVALIDDATA;
+ }
fix_timescale(c, sc);