libavcodec/atrac3.c:650: error: Integer Overflow L2
  (32 - [0, 64]):unsigned32 by call to `decode_channel_sound_unit`.

libavcodec/atrac3.c:648:9: Call
646.         /* channel coupling mode */
647.         /* decode Sound Unit 1 */
648.         bitstream_init(&q->bc, databuf, avctx->block_align * 8);
             ^
649. 
650.         ret = decode_channel_sound_unit(q, &q->bc, q->units, out_samples[0], 0,

libavcodec/bitstream.h:85:9: Assignment
  83.         bc->buffer    =
  84.         bc->ptr       = NULL;
  85.         bc->bits_left = 0;
              ^
  86.         return AVERROR_INVALIDDATA;
  87.     }

libavcodec/atrac3.c:650:15: Call
648.         bitstream_init(&q->bc, databuf, avctx->block_align * 8);
649. 
650.         ret = decode_channel_sound_unit(q, &q->bc, q->units, out_samples[0], 0,
                   ^
651.                                         JOINT_STEREO);
652.         if (ret != 0)

libavcodec/atrac3.c:571:1: Parameter `bc->bits_left`
  569.  * @param coding_mode   the coding mode (JOINT_STEREO or regular stereo/mono)
  570.  */
  571. static int decode_channel_sound_unit(ATRAC3Context *q, BitstreamContext *bc,
       ^
  572.                                      ChannelUnit *snd, float *output,
  573.                                      int channel_num, int coding_mode)

libavcodec/atrac3.c:585:13: Call
  583.         }
  584.     } else {
  585.         if (bitstream_read(bc, 6) != 0x28) {
                   ^
  586.             av_log(NULL,AV_LOG_ERROR,"Sound Unit id != 0x28.\n");
  587.             return AVERROR_INVALIDDATA;

libavcodec/bitstream.h:183:1: Parameter `n`
    181. 
    182. /* Return n bits from the buffer. n has to be in the 0-32 range. */
    183. static inline uint32_t bitstream_read(BitstreamContext *bc, unsigned n)
         ^
    184. {
    185.     if (!n)

libavcodec/bitstream.h:189:9: Call
    187. 
    188.     if (n > bc->bits_left) {
    189.         refill_32(bc);
                 ^
    190.         if (bc->bits_left < 32)
    191.             bc->bits_left = n;

libavcodec/bitstream.h:60:1: <RHS trace>
58. }
59. 
60. static inline void refill_32(BitstreamContext *bc)
    ^
61. {
62.     if (bc->ptr >= bc->buffer_end)

libavcodec/bitstream.h:60:1: Parameter `bc->bits_left`
      58. }
      59. 
      60. static inline void refill_32(BitstreamContext *bc)
          ^
      61. {
      62.     if (bc->ptr >= bc->buffer_end)

libavcodec/bitstream.h:68:5: Binary operation: (32 - [0, 64]):unsigned32 by call to `decode_channel_sound_unit` 
      66.     bc->bits       = (uint64_t)AV_RL32(bc->ptr) << bc->bits_left | bc->bits;
      67. #else
      68.     bc->bits       = bc->bits | (uint64_t)AV_RB32(bc->ptr) << (32 - bc->bits_left);
              ^
      69. #endif
      70.     bc->ptr       += 4;
