libavcodec/alsdec.c:390: error: Integer Overflow L2
  ([0, +oo] - [0, 2147483647]):unsigned32 by call to `bitstream_skip`.

libavcodec/alsdec.c:376:9: Assignment
374.     trailer_size = bitstream_read(&bc, 32);
375.     if (header_size  == 0xFFFFFFFF)
376.         header_size  = 0;
             ^
377.     if (trailer_size == 0xFFFFFFFF)
378.         trailer_size = 0;

libavcodec/alsdec.c:380:5: Assignment
378.         trailer_size = 0;
379. 
380.     ht_size = ((int64_t)(header_size) + (int64_t)(trailer_size)) << 3;
         ^
381. 
382. 

libavcodec/alsdec.c:390:5: Call
388.         return AVERROR_PATCHWELCOME;
389. 
390.     bitstream_skip(&bc, ht_size);
         ^
391. 
392. 

libavcodec/bitstream.h:240:1: Parameter `n`
  238. 
  239. /* Skip n bits in the buffer. */
  240. static inline void bitstream_skip(BitstreamContext *bc, unsigned n)
       ^
  241. {
  242.     if (n < bc->bits_left)

libavcodec/bitstream.h:243:9: Call
  241. {
  242.     if (n < bc->bits_left)
  243.         skip_remaining(bc, n);
               ^
  244.     else {
  245.         n -= bc->bits_left;

libavcodec/bitstream.h:229:1: <LHS trace>
227. }
228. 
229. static inline void skip_remaining(BitstreamContext *bc, unsigned n)
     ^
230. {
231. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:229:1: Parameter `bc->bits_left`
    227. }
    228. 
    229. static inline void skip_remaining(BitstreamContext *bc, unsigned n)
         ^
    230. {
    231. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:229:1: <RHS trace>
227. }
228. 
229. static inline void skip_remaining(BitstreamContext *bc, unsigned n)
     ^
230. {
231. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:229:1: Parameter `n`
    227. }
    228. 
    229. static inline void skip_remaining(BitstreamContext *bc, unsigned n)
         ^
    230. {
    231. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:236:5: Binary operation: ([0, +oo] - [0, 2147483647]):unsigned32 by call to `bitstream_skip` 
    234.     bc->bits <<= n;
    235. #endif
    236.     bc->bits_left -= n;
             ^
    237. }
    238. 
