libavcodec/smacker.c:290: error: Null Dereference
  pointer `smk->mmap_tbl` last assigned on line 289 could be null and is dereferenced at line 290, column 9.

libavcodec/smacker.c:276:1: start of procedure decode_header_trees()
274. }
275. 
276. static int decode_header_trees(SmackVContext *smk) {
     ^
277.     GetBitContext gb;
278.     int mmap_size, mclr_size, full_size, type_size;

libavcodec/smacker.c:280:5: 
278.     int mmap_size, mclr_size, full_size, type_size;
279. 
280.     mmap_size = AV_RL32(smk->avctx->extradata);
         ^
281.     mclr_size = AV_RL32(smk->avctx->extradata + 4);
282.     full_size = AV_RL32(smk->avctx->extradata + 8);

libavcodec/smacker.c:281:5: 
279. 
280.     mmap_size = AV_RL32(smk->avctx->extradata);
281.     mclr_size = AV_RL32(smk->avctx->extradata + 4);
         ^
282.     full_size = AV_RL32(smk->avctx->extradata + 8);
283.     type_size = AV_RL32(smk->avctx->extradata + 12);

libavcodec/smacker.c:282:5: 
280.     mmap_size = AV_RL32(smk->avctx->extradata);
281.     mclr_size = AV_RL32(smk->avctx->extradata + 4);
282.     full_size = AV_RL32(smk->avctx->extradata + 8);
         ^
283.     type_size = AV_RL32(smk->avctx->extradata + 12);
284. 

libavcodec/smacker.c:283:5: 
281.     mclr_size = AV_RL32(smk->avctx->extradata + 4);
282.     full_size = AV_RL32(smk->avctx->extradata + 8);
283.     type_size = AV_RL32(smk->avctx->extradata + 12);
         ^
284. 
285.     init_get_bits(&gb, smk->avctx->extradata + 16, (smk->avctx->extradata_size - 16) * 8);

libavcodec/smacker.c:285:5: 
283.     type_size = AV_RL32(smk->avctx->extradata + 12);
284. 
285.     init_get_bits(&gb, smk->avctx->extradata + 16, (smk->avctx->extradata_size - 16) * 8);
         ^
286. 
287.     if(!get_bits1(&gb)) {

libavcodec/get_bits.h:352:1: start of procedure init_get_bits()
  350.  * @param bit_size the size of the buffer in bits
  351.  */
  352. static inline void init_get_bits(GetBitContext *s, const uint8_t *buffer,
       ^
  353.                                  int bit_size)
  354. {

libavcodec/get_bits.h:355:5: 
  353.                                  int bit_size)
  354. {
  355.     int buffer_size = (bit_size+7)>>3;
           ^
  356.     if (buffer_size < 0 || bit_size < 0) {
  357.         buffer_size = bit_size = 0;

libavcodec/get_bits.h:356:9: Taking false branch
  354. {
  355.     int buffer_size = (bit_size+7)>>3;
  356.     if (buffer_size < 0 || bit_size < 0) {
               ^
  357.         buffer_size = bit_size = 0;
  358.         buffer = NULL;

libavcodec/get_bits.h:356:28: Taking false branch
  354. {
  355.     int buffer_size = (bit_size+7)>>3;
  356.     if (buffer_size < 0 || bit_size < 0) {
                                  ^
  357.         buffer_size = bit_size = 0;
  358.         buffer = NULL;

libavcodec/get_bits.h:361:5: 
  359.     }
  360. 
  361.     s->buffer       = buffer;
           ^
  362.     s->size_in_bits = bit_size;
  363. #if !UNCHECKED_BITSTREAM_READER

libavcodec/get_bits.h:362:5: 
  360. 
  361.     s->buffer       = buffer;
  362.     s->size_in_bits = bit_size;
           ^
  363. #if !UNCHECKED_BITSTREAM_READER
  364.     s->size_in_bits_plus8 = bit_size + 8;

libavcodec/get_bits.h:364:5: 
  362.     s->size_in_bits = bit_size;
  363. #if !UNCHECKED_BITSTREAM_READER
  364.     s->size_in_bits_plus8 = bit_size + 8;
           ^
  365. #endif
  366.     s->buffer_end   = buffer + buffer_size;

libavcodec/get_bits.h:366:5: 
  364.     s->size_in_bits_plus8 = bit_size + 8;
  365. #endif
  366.     s->buffer_end   = buffer + buffer_size;
           ^
  367.     s->index        = 0;
  368. }

libavcodec/get_bits.h:367:5: 
  365. #endif
  366.     s->buffer_end   = buffer + buffer_size;
  367.     s->index        = 0;
           ^
  368. }
  369. 

libavcodec/get_bits.h:368:1: return from a call to init_get_bits
  366.     s->buffer_end   = buffer + buffer_size;
  367.     s->index        = 0;
  368. }
       ^
  369. 
  370. static inline void align_get_bits(GetBitContext *s)

libavcodec/smacker.c:287:9: 
285.     init_get_bits(&gb, smk->avctx->extradata + 16, (smk->avctx->extradata_size - 16) * 8);
286. 
287.     if(!get_bits1(&gb)) {
             ^
288.         av_log(smk->avctx, AV_LOG_INFO, "Skipping MMAP tree\n");
289.         smk->mmap_tbl = av_malloc(sizeof(int) * 2);

libavcodec/get_bits.h:268:1: start of procedure get_bits1()
  266. }
  267. 
  268. static inline unsigned int get_bits1(GetBitContext *s)
       ^
  269. {
  270.     unsigned int index = s->index;

libavcodec/get_bits.h:270:5: 
  268. static inline unsigned int get_bits1(GetBitContext *s)
  269. {
  270.     unsigned int index = s->index;
           ^
  271.     uint8_t result = s->buffer[index>>3];
  272. #ifdef BITSTREAM_READER_LE

libavcodec/get_bits.h:271:5: 
  269. {
  270.     unsigned int index = s->index;
  271.     uint8_t result = s->buffer[index>>3];
           ^
  272. #ifdef BITSTREAM_READER_LE
  273.     result >>= index & 7;

libavcodec/get_bits.h:273:5: 
  271.     uint8_t result = s->buffer[index>>3];
  272. #ifdef BITSTREAM_READER_LE
  273.     result >>= index & 7;
           ^
  274.     result &= 1;
  275. #else

libavcodec/get_bits.h:274:5: 
  272. #ifdef BITSTREAM_READER_LE
  273.     result >>= index & 7;
  274.     result &= 1;
           ^
  275. #else
  276.     result <<= index & 7;

libavcodec/get_bits.h:280:9: Taking false branch
  278. #endif
  279. #if !UNCHECKED_BITSTREAM_READER
  280.     if (s->index < s->size_in_bits_plus8)
               ^
  281. #endif
  282.         index++;

libavcodec/get_bits.h:283:5: 
  281. #endif
  282.         index++;
  283.     s->index = index;
           ^
  284. 
  285.     return result;

libavcodec/get_bits.h:285:5: 
  283.     s->index = index;
  284. 
  285.     return result;
           ^
  286. }
  287. 

libavcodec/get_bits.h:286:1: return from a call to get_bits1
  284. 
  285.     return result;
  286. }
       ^
  287. 
  288. static inline unsigned int show_bits1(GetBitContext *s)

libavcodec/smacker.c:287:9: Taking true branch
285.     init_get_bits(&gb, smk->avctx->extradata + 16, (smk->avctx->extradata_size - 16) * 8);
286. 
287.     if(!get_bits1(&gb)) {
             ^
288.         av_log(smk->avctx, AV_LOG_INFO, "Skipping MMAP tree\n");
289.         smk->mmap_tbl = av_malloc(sizeof(int) * 2);

libavcodec/smacker.c:288:9: Skipping av_log(): empty list of specs
286. 
287.     if(!get_bits1(&gb)) {
288.         av_log(smk->avctx, AV_LOG_INFO, "Skipping MMAP tree\n");
             ^
289.         smk->mmap_tbl = av_malloc(sizeof(int) * 2);
290.         smk->mmap_tbl[0] = 0;

libavcodec/smacker.c:289:9: 
287.     if(!get_bits1(&gb)) {
288.         av_log(smk->avctx, AV_LOG_INFO, "Skipping MMAP tree\n");
289.         smk->mmap_tbl = av_malloc(sizeof(int) * 2);
             ^
290.         smk->mmap_tbl[0] = 0;
291.         smk->mmap_last[0] = smk->mmap_last[1] = smk->mmap_last[2] = 1;

libavutil/mem.c:64:1: start of procedure av_malloc()
  62.    linker will do it automatically. */
  63. 
  64. void *av_malloc(size_t size)
      ^
  65. {
  66.     void *ptr = NULL;

libavutil/mem.c:66:5: 
  64. void *av_malloc(size_t size)
  65. {
  66.     void *ptr = NULL;
          ^
  67. #if CONFIG_MEMALIGN_HACK
  68.     long diff;

libavutil/mem.c:71:5: 
  69. #endif
  70. 
  71.     assert(size);
          ^
  72. 
  73.     /* let's disallow possible ambiguous cases */

libavutil/mem.c:74:9: Taking false branch
  72. 
  73.     /* let's disallow possible ambiguous cases */
  74.     if (size > (INT_MAX-32) || !size)
              ^
  75.         return NULL;
  76. 

libavutil/mem.c:74:33: Taking false branch
  72. 
  73.     /* let's disallow possible ambiguous cases */
  74.     if (size > (INT_MAX-32) || !size)
                                      ^
  75.         return NULL;
  76. 

libavutil/mem.c:85:9: Taking true branch
  83.     ((char*)ptr)[-1]= diff;
  84. #elif HAVE_POSIX_MEMALIGN
  85.     if (posix_memalign(&ptr,32,size))
              ^
  86.         ptr = NULL;
  87. #elif HAVE_ALIGNED_MALLOC

libavutil/mem.c:86:9: 
  84. #elif HAVE_POSIX_MEMALIGN
  85.     if (posix_memalign(&ptr,32,size))
  86.         ptr = NULL;
              ^
  87. #elif HAVE_ALIGNED_MALLOC
  88.     ptr = _aligned_malloc(size, 32);

libavutil/mem.c:118:5: 
  116.     ptr = malloc(size);
  117. #endif
  118.     return ptr;
           ^
  119. }
  120. 

libavutil/mem.c:119:1: return from a call to av_malloc
  117. #endif
  118.     return ptr;
  119. }
       ^
  120. 
  121. void *av_realloc(void *ptr, size_t size)

libavcodec/smacker.c:290:9: 
288.         av_log(smk->avctx, AV_LOG_INFO, "Skipping MMAP tree\n");
289.         smk->mmap_tbl = av_malloc(sizeof(int) * 2);
290.         smk->mmap_tbl[0] = 0;
             ^
291.         smk->mmap_last[0] = smk->mmap_last[1] = smk->mmap_last[2] = 1;
292.     } else {
