st = s->streams[n];
break;
}
- if (n == s->nb_streams)
+ if (n == s->nb_streams) {
+ av_log(s, AV_LOG_ERROR,
+ "Invalid stream index %d for index at pos %"PRId64"\n",
+ str_id, avio_tell(pb));
goto skip;
+ } else if ((avio_size(pb) - avio_tell(pb)) / 14 < n_pkts) {
+ av_log(s, AV_LOG_ERROR,
+ "Nr. of packets in packet index for stream index %d "
+ "exceeds filesize (%"PRId64" at %"PRId64" = %d)\n",
+ str_id, avio_size(pb), avio_tell(pb),
+ (avio_size(pb) - avio_tell(pb)) / 14);
+ goto skip;
+ }
for (n = 0; n < n_pkts; n++) {
avio_skip(pb, 2);
}
skip:
- if (next_off && avio_tell(pb) != next_off &&
- avio_seek(pb, next_off, SEEK_SET) < 0)
+ if (next_off && avio_tell(pb) < next_off &&
+ avio_seek(pb, next_off, SEEK_SET) < 0) {
+ av_log(s, AV_LOG_ERROR,
+ "Non-linear index detected, not supported\n");
return -1;
+ }
} while (next_off);
return 0;