libavcodec/ac3dec.c:1322: error: Buffer Overrun L3
  Offset: [-1, +oo] Size: 6 by call to `decode_audio_block`.

libavcodec/ac3dec.c:1321:10: Assignment
1319.     for (ch = 0; ch < s->out_channels; ch++)
1320.         output[ch] = s->output[channel_map[ch]];
1321.     for (blk = 0; blk < s->num_blocks; blk++) {
               ^
1322.         if (!err && decode_audio_block(s, blk)) {
1323.             av_log(avctx, AV_LOG_ERROR, "error decoding the audio block\n");

libavcodec/ac3dec.c:1322:21: Call
1320.         output[ch] = s->output[channel_map[ch]];
1321.     for (blk = 0; blk < s->num_blocks; blk++) {
1322.         if (!err && decode_audio_block(s, blk)) {
                          ^
1323.             av_log(avctx, AV_LOG_ERROR, "error decoding the audio block\n");
1324.             err = 1;

libavcodec/ac3dec.c:779:1: <Offset trace>
777.  * Decode a single audio block from the AC-3 bitstream.
778.  */
779. static int decode_audio_block(AC3DecodeContext *s, int blk)
     ^
780. {
781.     int fbw_channels = s->fbw_channels;

libavcodec/ac3dec.c:779:1: Parameter `blk`
  777.  * Decode a single audio block from the AC-3 bitstream.
  778.  */
  779. static int decode_audio_block(AC3DecodeContext *s, int blk)
       ^
  780. {
  781.     int fbw_channels = s->fbw_channels;

libavcodec/ac3dec.c:779:1: <Length trace>
777.  * Decode a single audio block from the AC-3 bitstream.
778.  */
779. static int decode_audio_block(AC3DecodeContext *s, int blk)
     ^
780. {
781.     int fbw_channels = s->fbw_channels;

libavcodec/ac3dec.c:779:1: Parameter `s->cpl_in_use[*]`
  777.  * Decode a single audio block from the AC-3 bitstream.
  778.  */
  779. static int decode_audio_block(AC3DecodeContext *s, int blk)
       ^
  780. {
  781.     int fbw_channels = s->fbw_channels;

libavcodec/ac3dec.c:895:34: Array access: Offset: [-1, +oo] Size: 6 by call to `decode_audio_block` 
  893.             return -1;
  894.         } else {
  895.             s->cpl_in_use[blk] = s->cpl_in_use[blk-1];
                                        ^
  896.         }
  897.     }
