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

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

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

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

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

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

libavcodec/bitstream.h:237:5: Binary operation: ([0, +oo] - [0, 2147483647]):unsigned32 by call to `bitstream_skip` 
    235.     bc->bits <<= n;
    236. #endif
    237.     bc->bits_left -= n;
             ^
    238. }
    239. 
