libavcodec/g2meet.c:252: error: Null Dereference
  pointer `c->buf` last assigned on line 249 could be null and is dereferenced by call to `jpg_unescape()` at line 252, column 5.

libavcodec/g2meet.c:237:1: start of procedure jpg_decode_data()
235. }
236. 
237. static int jpg_decode_data(JPGContext *c, int width, int height,
     ^
238.                            const uint8_t *src, int src_size,
239.                            uint8_t *dst, int dst_stride,

libavcodec/g2meet.c:249:9: 
247.     int ret;
248. 
249.     if ((ret = av_reallocp(&c->buf,
             ^
250.                            src_size + FF_INPUT_BUFFER_PADDING_SIZE)) < 0)
251.         return ret;

libavutil/mem.c:140:1: start of procedure av_reallocp()
  138. }
  139. 
  140. int av_reallocp(void *ptr, size_t size)
       ^
  141. {
  142.     void **ptrptr = ptr;

libavutil/mem.c:142:5: 
  140. int av_reallocp(void *ptr, size_t size)
  141. {
  142.     void **ptrptr = ptr;
           ^
  143.     void *ret;
  144. 

libavutil/mem.c:145:10: Taking true branch
  143.     void *ret;
  144. 
  145.     if (!size) {
                ^
  146.         av_freep(ptr);
  147.         return 0;

libavutil/mem.c:146:9: 
  144. 
  145.     if (!size) {
  146.         av_freep(ptr);
               ^
  147.         return 0;
  148.     }

libavutil/mem.c:198:1: start of procedure av_freep()
    196. }
    197. 
    198. void av_freep(void *arg)
         ^
    199. {
    200.     void **ptr = (void **)arg;

libavutil/mem.c:200:5: 
    198. void av_freep(void *arg)
    199. {
    200.     void **ptr = (void **)arg;
             ^
    201.     av_free(*ptr);
    202.     *ptr = NULL;

libavutil/mem.c:201:5: 
    199. {
    200.     void **ptr = (void **)arg;
    201.     av_free(*ptr);
             ^
    202.     *ptr = NULL;
    203. }

libavutil/mem.c:186:1: start of procedure av_free()
      184. }
      185. 
      186. void av_free(void *ptr)
           ^
      187. {
      188. #if CONFIG_MEMALIGN_HACK

libavutil/mem.c:194:5: 
      192.     _aligned_free(ptr);
      193. #else
      194.     free(ptr);
               ^
      195. #endif
      196. }

libavutil/mem.c:196:1: return from a call to av_free
      194.     free(ptr);
      195. #endif
      196. }
           ^
      197. 
      198. void av_freep(void *arg)

libavutil/mem.c:202:5: 
    200.     void **ptr = (void **)arg;
    201.     av_free(*ptr);
    202.     *ptr = NULL;
             ^
    203. }
    204. 

libavutil/mem.c:203:1: return from a call to av_freep
    201.     av_free(*ptr);
    202.     *ptr = NULL;
    203. }
         ^
    204. 
    205. void *av_mallocz(size_t size)

libavutil/mem.c:147:9: 
  145.     if (!size) {
  146.         av_freep(ptr);
  147.         return 0;
               ^
  148.     }
  149.     ret = av_realloc(*ptrptr, size);

libavutil/mem.c:158:1: return from a call to av_reallocp
  156.     *ptrptr = ret;
  157.     return 0;
  158. }
       ^
  159. 
  160. void *av_realloc_array(void *ptr, size_t nmemb, size_t size)

libavcodec/g2meet.c:249:9: Taking false branch
247.     int ret;
248. 
249.     if ((ret = av_reallocp(&c->buf,
             ^
250.                            src_size + FF_INPUT_BUFFER_PADDING_SIZE)) < 0)
251.         return ret;

libavcodec/g2meet.c:252:5: 
250.                            src_size + FF_INPUT_BUFFER_PADDING_SIZE)) < 0)
251.         return ret;
252.     jpg_unescape(src, src_size, c->buf, &unesc_size);
         ^
253.     memset(c->buf + unesc_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
254.     init_get_bits(&gb, c->buf, unesc_size * 8);

libavcodec/g2meet.c:176:1: start of procedure jpg_unescape()
  174. }
  175. 
  176. static void jpg_unescape(const uint8_t *src, int src_size,
       ^
  177.                          uint8_t *dst, int *dst_size)
  178. {

libavcodec/g2meet.c:179:5: 
  177.                          uint8_t *dst, int *dst_size)
  178. {
  179.     const uint8_t *src_end = src + src_size;
           ^
  180.     uint8_t *dst_start = dst;
  181. 

libavcodec/g2meet.c:180:5: 
  178. {
  179.     const uint8_t *src_end = src + src_size;
  180.     uint8_t *dst_start = dst;
           ^
  181. 
  182.     while (src < src_end) {

libavcodec/g2meet.c:182:12: Loop condition is false. Leaving loop
  180.     uint8_t *dst_start = dst;
  181. 
  182.     while (src < src_end) {
                  ^
  183.         uint8_t x = *src++;
  184. 

libavcodec/g2meet.c:190:5: 
  188.             src++;
  189.     }
  190.     *dst_size = dst - dst_start;
           ^
  191. }
  192. 

libavcodec/g2meet.c:191:1: return from a call to jpg_unescape
  189.     }
  190.     *dst_size = dst - dst_start;
  191. }
       ^
  192. 
  193. static int jpg_decode_block(JPGContext *c, GetBitContext *gb,
