libavcodec/vorbis_dec.c:834: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned64 by call to `vorbis_parse_setup_hdr_floors`.

libavcodec/vorbis_dec.c:826:9: Call
824.     }
825. 
826.     if (vorbis_parse_setup_hdr_codebooks(vc)) {
             ^
827.         av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
828.         return -2;

libavcodec/vorbis_dec.c:248:10: Assignment
  246.     tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(uint32_t));
  247. 
  248.     for (cb = 0; cb < vc->codebook_count; ++cb) {
                ^
  249.         vorbis_codebook *codebook_setup = &vc->codebooks[cb];
  250.         uint_fast8_t ordered;

libavcodec/vorbis_dec.c:834:9: Call
832.         return -3;
833.     }
834.     if (vorbis_parse_setup_hdr_floors(vc)) {
             ^
835.         av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
836.         return -4;

libavcodec/vorbis_dec.c:460:1: <LHS trace>
458. static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc,
459.                                          vorbis_floor_data *vfu, float *vec);
460. static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
     ^
461. {
462.     GetBitContext *gb = &vc->gb;

libavcodec/vorbis_dec.c:460:1: Parameter `vc->codebook_count`
  458. static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc,
  459.                                          vorbis_floor_data *vfu, float *vec);
  460. static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
       ^
  461. {
  462.     GetBitContext *gb = &vc->gb;

libavcodec/vorbis_dec.c:507:21: Binary operation: ([0, +oo] - 1):unsigned64 by call to `vorbis_parse_setup_hdr_floors` 
  505. 
  506.                 if (floor_setup->data.t1.class_subclasses[j]) {
  507.                     GET_VALIDATED_INDEX(floor_setup->data.t1.class_masterbook[j], 8, vc->codebook_count)
                           ^
  508. 
  509.                     AV_DEBUG("   masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
