libavcodec/wmalosslessdec.c:350: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned32 by call to `bitstream_read_bit`.

libavcodec/wmalosslessdec.c:364:29: Call
362. 
363.         /* get subframe length, subframe_len == 0 is not allowed */
364.         if ((subframe_len = decode_subframe_length(s, min_channel_len)) <= 0)
                                 ^
365.             return AVERROR_INVALIDDATA;
366.         /* add subframes to the individual channels and find new min_channel_len */

libavcodec/wmalosslessdec.c:280:1: Parameter `s->bc.bits_left`
  278.  * @return decoded subframe length on success, < 0 in case of an error
  279.  */
  280. static int decode_subframe_length(WmallDecodeCtx *s, int offset)
       ^
  281. {
  282.     int frame_len_ratio, subframe_len, len;

libavcodec/wmalosslessdec.c:350:25: Call
348.                     contains_subframe[c] = in_use = 1;
349.                 } else {
350.                     if (bitstream_read_bit(&s->bc))
                             ^
351.                         contains_subframe[c] = in_use = 1;
352.                 }

libavcodec/bitstream.h:145:1: Parameter `bc->bits_left`
  143. 
  144. /* Return one bit from the buffer. */
  145. static inline unsigned bitstream_read_bit(BitstreamContext *bc)
       ^
  146. {
  147.     if (!bc->bits_left)

libavcodec/bitstream.h:150:12: Call
  148.         refill_64(bc);
  149. 
  150.     return get_val(bc, 1);
                  ^
  151. }
  152. 

libavcodec/bitstream.h:130:1: <LHS trace>
128. }
129. 
130. static inline uint64_t get_val(BitstreamContext *bc, unsigned n)
     ^
131. {
132. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:130:1: Parameter `bc->bits_left`
    128. }
    129. 
    130. static inline uint64_t get_val(BitstreamContext *bc, unsigned n)
         ^
    131. {
    132. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:130:1: <RHS trace>
128. }
129. 
130. static inline uint64_t get_val(BitstreamContext *bc, unsigned n)
     ^
131. {
132. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:130:1: Parameter `n`
    128. }
    129. 
    130. static inline uint64_t get_val(BitstreamContext *bc, unsigned n)
         ^
    131. {
    132. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:139:5: Binary operation: ([0, +oo] - 1):unsigned32 by call to `bitstream_read_bit` 
    137.     bc->bits <<= n;
    138. #endif
    139.     bc->bits_left -= n;
             ^
    140. 
    141.     return ret;
