libavcodec/smacker.c:610: error: Null Dereference
  pointer `&gb->buffer` last assigned on line 608 could be null and is dereferenced by call to `get_bits1()` at line 610, column 9.

libavcodec/smacker.c:584:1: start of procedure smka_decode_frame()
582.  * Decode Smacker audio data
583.  */
584. static int smka_decode_frame(AVCodecContext *avctx, void *data,
     ^
585.                              int *got_frame_ptr, AVPacket *avpkt)
586. {

libavcodec/smacker.c:587:5: 
585.                              int *got_frame_ptr, AVPacket *avpkt)
586. {
587.     SmackerAudioContext *s = avctx->priv_data;
         ^
588.     const uint8_t *buf = avpkt->data;
589.     int buf_size = avpkt->size;

libavcodec/smacker.c:588:5: 
586. {
587.     SmackerAudioContext *s = avctx->priv_data;
588.     const uint8_t *buf = avpkt->data;
         ^
589.     int buf_size = avpkt->size;
590.     GetBitContext gb;

libavcodec/smacker.c:589:5: 
587.     SmackerAudioContext *s = avctx->priv_data;
588.     const uint8_t *buf = avpkt->data;
589.     int buf_size = avpkt->size;
         ^
590.     GetBitContext gb;
591.     HuffContext h[4] = { { 0 } };

libavcodec/smacker.c:591:5: 
589.     int buf_size = avpkt->size;
590.     GetBitContext gb;
591.     HuffContext h[4] = { { 0 } };
         ^
592.     VLC vlc[4]       = { { 0 } };
593.     int16_t *samples;

libavcodec/smacker.c:592:5: 
590.     GetBitContext gb;
591.     HuffContext h[4] = { { 0 } };
592.     VLC vlc[4]       = { { 0 } };
         ^
593.     int16_t *samples;
594.     uint8_t *samples8;

libavcodec/smacker.c:599:5: 
597.     int unp_size;
598.     int bits, stereo;
599.     int pred[2] = {0, 0};
         ^
600. 
601.     if (buf_size <= 4) {

libavcodec/smacker.c:601:9: Taking false branch
599.     int pred[2] = {0, 0};
600. 
601.     if (buf_size <= 4) {
             ^
602.         av_log(avctx, AV_LOG_ERROR, "packet is too small\n");
603.         return AVERROR(EINVAL);

libavcodec/smacker.c:606:5: 
604.     }
605. 
606.     unp_size = AV_RL32(buf);
         ^
607. 
608.     init_get_bits(&gb, buf + 4, (buf_size - 4) * 8);

libavcodec/smacker.c:608:5: 
606.     unp_size = AV_RL32(buf);
607. 
608.     init_get_bits(&gb, buf + 4, (buf_size - 4) * 8);
         ^
609. 
610.     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 true 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:357:9: 
  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;
  359.     }

libavcodec/get_bits.h:358:9: 
  356.     if (buffer_size < 0 || bit_size < 0) {
  357.         buffer_size = bit_size = 0;
  358.         buffer = NULL;
               ^
  359.     }
  360. 

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:610:9: 
608.     init_get_bits(&gb, buf + 4, (buf_size - 4) * 8);
609. 
610.     if(!get_bits1(&gb)){
             ^
611.         av_log(avctx, AV_LOG_INFO, "Sound: no data\n");
612.         *got_frame_ptr = 0;

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;
