libavcodec/smacker.c:139: error: Integer Overflow L2
  ([0, 126+max(64, `bc->bits_left`)] - 9):unsigned32 by call to `bitstream_read_vlc`.

libavcodec/smacker.c:129:1: Parameter `bc->bits_left`
127.  * Decode header tree
128.  */
129. static int smacker_decode_bigtree(BitstreamContext *bc, HuffContext *hc,
     ^
130.                                   DBCtx *ctx)
131. {

libavcodec/smacker.c:136:10: Call
134.         return -1;
135.     }
136.     if (!bitstream_read_bit(bc)) { // Leaf
              ^
137.         int val, i1, i2;
138.         i1 = ctx->v1->table ? bitstream_read_vlc(bc, ctx->v1->table, SMKTREE_BITS, 3) : 0;

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: 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: Assignment
    137.     bc->bits <<= n;
    138. #endif
    139.     bc->bits_left -= n;
             ^
    140. 
    141.     return ret;

libavcodec/smacker.c:139:31: Call
137.         int val, i1, i2;
138.         i1 = ctx->v1->table ? bitstream_read_vlc(bc, ctx->v1->table, SMKTREE_BITS, 3) : 0;
139.         i2 = ctx->v2->table ? bitstream_read_vlc(bc, ctx->v2->table, SMKTREE_BITS, 3) : 0;
                                   ^
140.         if (i1 < 0 || i2 < 0)
141.             return -1;

libavcodec/bitstream.h:313:1: Parameter `bits`
  311.  * If the VLC code is invalid and max_depth > 1, then the number of bits removed
  312.  * is undefined. */
  313. static inline int bitstream_read_vlc(BitstreamContext *bc, VLC_TYPE (*table)[2],
       ^
  314.                                      int bits, int max_depth)
  315. {

libavcodec/bitstream.h:322:9: Call
  320. 
  321.     if (max_depth > 1 && n < 0) {
  322.         skip_remaining(bc, bits);
               ^
  323.         code = set_idx(bc, code, &n, &nb_bits, table);
  324.         if (max_depth > 2 && n < 0) {

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, 126+max(64, bc->bits_left)] - 9):unsigned32 by call to `bitstream_read_vlc` 
    235.     bc->bits <<= n;
    236. #endif
    237.     bc->bits_left -= n;
             ^
    238. }
    239. 
