libavcodec/wmalosslessdec.c:419: error: Integer Overflow L2
  ([1, +oo] - 4):unsigned32 by call to `bitstream_read`.

libavcodec/wmalosslessdec.c:419:25: Call
417. static void decode_mclms(WmallDecodeCtx *s)
418. {
419.     s->mclms_order   = (bitstream_read(&s->bc, 4) + 1) * 2;
                             ^
420.     s->mclms_scaling =  bitstream_read(&s->bc, 4);
421.     if (bitstream_read_bit(&s->bc)) {

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:194:12: Call
  192.     }
  193. 
  194.     return get_val(bc, n);
                  ^
  195. }
  196. 

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: ([1, +oo] - 4):unsigned32 by call to `bitstream_read` 
    137.     bc->bits <<= n;
    138. #endif
    139.     bc->bits_left -= n;
             ^
    140. 
    141.     return ret;

static inline uint64_t get_val(BitstreamContext *bc, unsigned n)
{
#ifdef BITSTREAM_READER_LE
    uint64_t ret = bc->bits & ((UINT64_C(1) << n) - 1);
    bc->bits >>= n;
#else
    uint64_t ret = bc->bits >> (64 - n);
    bc->bits <<= n;
#endif
    bc->bits_left -= n;
    return ret;
}
['static void decode_mclms(WmallDecodeCtx *s)\n{\n    s->mclms_order   = (bitstream_read(&s->bc, 4) + 1) * 2;\n    s->mclms_scaling =  bitstream_read(&s->bc, 4);\n    if (bitstream_read_bit(&s->bc)) {\n        int i, send_coef_bits;\n        int cbits = av_log2(s->mclms_scaling + 1);\n        if (1 << cbits < s->mclms_scaling + 1)\n            cbits++;\n        send_coef_bits = bitstream_read(&s->bc, cbits) + 2;\n        for (i = 0; i < s->mclms_order * s->num_channels * s->num_channels; i++)\n            s->mclms_coeffs[i] = bitstream_read(&s->bc, send_coef_bits);\n        for (i = 0; i < s->num_channels; i++) {\n            int c;\n            for (c = 0; c < i; c++)\n                s->mclms_coeffs_cur[i * s->num_channels + c] = bitstream_read(&s->bc, send_coef_bits);\n        }\n    }\n}', 'static inline uint32_t bitstream_read(BitstreamContext *bc, unsigned n)\n{\n    if (!n)\n        return 0;\n    if (n > bc->bits_left) {\n        refill_32(bc);\n        if (bc->bits_left < 32)\n            bc->bits_left = n;\n    }\n    return get_val(bc, n);\n}', 'static inline uint64_t get_val(BitstreamContext *bc, unsigned n)\n{\n#ifdef BITSTREAM_READER_LE\n    uint64_t ret = bc->bits & ((UINT64_C(1) << n) - 1);\n    bc->bits >>= n;\n#else\n    uint64_t ret = bc->bits >> (64 - n);\n    bc->bits <<= n;\n#endif\n    bc->bits_left -= n;\n    return ret;\n}']