libavformat/matroskadec.c:959: error: Memory Leak
  memory dynamically allocated by call to `av_realloc()` at line 959, column 24 is not reachable after line 959, column 13.

libavformat/matroskadec.c:938:1: start of procedure matroska_decode_buffer()
936. }
937. 
938. static int matroska_decode_buffer(uint8_t** buf, int* buf_size,
     ^
939.                                   MatroskaTrack *track)
940. {

libavformat/matroskadec.c:941:5: 
939.                                   MatroskaTrack *track)
940. {
941.     MatroskaTrackEncoding *encodings = track->encodings.elem;
         ^
942.     uint8_t* data = *buf;
943.     int isize = *buf_size;

libavformat/matroskadec.c:942:5: 
940. {
941.     MatroskaTrackEncoding *encodings = track->encodings.elem;
942.     uint8_t* data = *buf;
         ^
943.     int isize = *buf_size;
944.     uint8_t* pkt_data = NULL;

libavformat/matroskadec.c:943:5: 
941.     MatroskaTrackEncoding *encodings = track->encodings.elem;
942.     uint8_t* data = *buf;
943.     int isize = *buf_size;
         ^
944.     uint8_t* pkt_data = NULL;
945.     uint8_t av_unused *newpktdata;

libavformat/matroskadec.c:944:5: 
942.     uint8_t* data = *buf;
943.     int isize = *buf_size;
944.     uint8_t* pkt_data = NULL;
         ^
945.     uint8_t av_unused *newpktdata;
946.     int pkt_size = isize;

libavformat/matroskadec.c:946:5: 
944.     uint8_t* pkt_data = NULL;
945.     uint8_t av_unused *newpktdata;
946.     int pkt_size = isize;
         ^
947.     int result = 0;
948.     int olen;

libavformat/matroskadec.c:947:5: 
945.     uint8_t av_unused *newpktdata;
946.     int pkt_size = isize;
947.     int result = 0;
         ^
948.     int olen;
949. 

libavformat/matroskadec.c:950:9: Taking false branch
948.     int olen;
949. 
950.     if (pkt_size >= 10000000)
             ^
951.         return -1;
952. 

libavformat/matroskadec.c:953:5: 
951.         return -1;
952. 
953.     switch (encodings[0].compression.algo) {
         ^
954.     case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
955.         return encodings[0].compression.settings.size;

libavformat/matroskadec.c:954:5: Switch condition is false. Skipping switch case
952. 
953.     switch (encodings[0].compression.algo) {
954.     case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
         ^
955.         return encodings[0].compression.settings.size;
956.     case MATROSKA_TRACK_ENCODING_COMP_LZO:

libavformat/matroskadec.c:956:5: Switch condition is true. Entering switch case
954.     case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
955.         return encodings[0].compression.settings.size;
956.     case MATROSKA_TRACK_ENCODING_COMP_LZO:
         ^
957.         do {
958.             olen = pkt_size *= 3;

libavformat/matroskadec.c:958:13: 
956.     case MATROSKA_TRACK_ENCODING_COMP_LZO:
957.         do {
958.             olen = pkt_size *= 3;
                 ^
959.             pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
960.             result = av_lzo1x_decode(pkt_data, &olen, data, &isize);

libavformat/matroskadec.c:959:13: 
957.         do {
958.             olen = pkt_size *= 3;
959.             pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
                 ^
960.             result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
961.         } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);

libavutil/mem.c:117:1: start of procedure av_realloc()
  115. }
  116. 
  117. void *av_realloc(void *ptr, size_t size)
       ^
  118. {
  119. #if CONFIG_MEMALIGN_HACK

libavutil/mem.c:124:8: Taking false branch
  122. 
  123.     /* let's disallow possible ambiguous cases */
  124.     if(size > (INT_MAX-16) )
              ^
  125.         return NULL;
  126. 

libavutil/mem.c:133:5: 
  131.     return (char*)realloc((char*)ptr - diff, size + diff) + diff;
  132. #else
  133.     return realloc(ptr, size);
           ^
  134. #endif
  135. }

libavutil/mem.c:135:1: return from a call to av_realloc
  133.     return realloc(ptr, size);
  134. #endif
  135. }
       ^
  136. 
  137. void av_free(void *ptr)

libavformat/matroskadec.c:960:13: Skipping av_lzo1x_decode(): empty list of specs
958.             olen = pkt_size *= 3;
959.             pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
960.             result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
                 ^
961.         } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);
962.         if (result)

libavformat/matroskadec.c:961:18: Loop condition is true. Entering loop body
959.             pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
960.             result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
961.         } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);
                      ^
962.         if (result)
963.             goto failed;

libavformat/matroskadec.c:961:48: Loop condition is true. Entering loop body
959.             pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
960.             result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
961.         } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);
                                                    ^
962.         if (result)
963.             goto failed;

libavformat/matroskadec.c:958:13: 
956.     case MATROSKA_TRACK_ENCODING_COMP_LZO:
957.         do {
958.             olen = pkt_size *= 3;
                 ^
959.             pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
960.             result = av_lzo1x_decode(pkt_data, &olen, data, &isize);

libavformat/matroskadec.c:959:13: 
957.         do {
958.             olen = pkt_size *= 3;
959.             pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
                 ^
960.             result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
961.         } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);

libavutil/mem.c:117:1: start of procedure av_realloc()
  115. }
  116. 
  117. void *av_realloc(void *ptr, size_t size)
       ^
  118. {
  119. #if CONFIG_MEMALIGN_HACK

libavutil/mem.c:124:8: Taking true branch
  122. 
  123.     /* let's disallow possible ambiguous cases */
  124.     if(size > (INT_MAX-16) )
              ^
  125.         return NULL;
  126. 

libavutil/mem.c:125:9: 
  123.     /* let's disallow possible ambiguous cases */
  124.     if(size > (INT_MAX-16) )
  125.         return NULL;
               ^
  126. 
  127. #if CONFIG_MEMALIGN_HACK

libavutil/mem.c:135:1: return from a call to av_realloc
  133.     return realloc(ptr, size);
  134. #endif
  135. }
       ^
  136. 
  137. void av_free(void *ptr)

static int matroska_decode_buffer(uint8_t** buf, int* buf_size,
                                  MatroskaTrack *track)
{
    MatroskaTrackEncoding *encodings = track->encodings.elem;
    uint8_t* data = *buf;
    int isize = *buf_size;
    uint8_t* pkt_data = NULL;
    uint8_t av_unused *newpktdata;
    int pkt_size = isize;
    int result = 0;
    int olen;
    if (pkt_size >= 10000000)
        return -1;
    switch (encodings[0].compression.algo) {
    case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
        return encodings[0].compression.settings.size;
    case MATROSKA_TRACK_ENCODING_COMP_LZO:
        do {
            olen = pkt_size *= 3;
            pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
            result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
        } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);
        if (result)
            goto failed;
        pkt_size -= olen;
        break;
#if CONFIG_ZLIB
    case MATROSKA_TRACK_ENCODING_COMP_ZLIB: {
        z_stream zstream = {0};
        if (inflateInit(&zstream) != Z_OK)
            return -1;
        zstream.next_in = data;
        zstream.avail_in = isize;
        do {
            pkt_size *= 3;
            newpktdata = av_realloc(pkt_data, pkt_size);
            if (!newpktdata) {
                inflateEnd(&zstream);
                goto failed;
            }
            pkt_data = newpktdata;
            zstream.avail_out = pkt_size - zstream.total_out;
            zstream.next_out = pkt_data + zstream.total_out;
            result = inflate(&zstream, Z_NO_FLUSH);
        } while (result==Z_OK && pkt_size<10000000);
        pkt_size = zstream.total_out;
        inflateEnd(&zstream);
        if (result != Z_STREAM_END)
            goto failed;
        break;
    }
#endif
#if CONFIG_BZLIB
    case MATROSKA_TRACK_ENCODING_COMP_BZLIB: {
        bz_stream bzstream = {0};
        if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
            return -1;
        bzstream.next_in = data;
        bzstream.avail_in = isize;
        do {
            pkt_size *= 3;
            newpktdata = av_realloc(pkt_data, pkt_size);
            if (!newpktdata) {
                BZ2_bzDecompressEnd(&bzstream);
                goto failed;
            }
            pkt_data = newpktdata;
            bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
            bzstream.next_out = pkt_data + bzstream.total_out_lo32;
            result = BZ2_bzDecompress(&bzstream);
        } while (result==BZ_OK && pkt_size<10000000);
        pkt_size = bzstream.total_out_lo32;
        BZ2_bzDecompressEnd(&bzstream);
        if (result != BZ_STREAM_END)
            goto failed;
        break;
    }
#endif
    default:
        return -1;
    }
    *buf = pkt_data;
    *buf_size = pkt_size;
    return 0;
 failed:
    av_free(pkt_data);
    return -1;
}
['static int matroska_decode_buffer(uint8_t** buf, int* buf_size,\n                                  MatroskaTrack *track)\n{\n    MatroskaTrackEncoding *encodings = track->encodings.elem;\n    uint8_t* data = *buf;\n    int isize = *buf_size;\n    uint8_t* pkt_data = NULL;\n    uint8_t av_unused *newpktdata;\n    int pkt_size = isize;\n    int result = 0;\n    int olen;\n    if (pkt_size >= 10000000)\n        return -1;\n    switch (encodings[0].compression.algo) {\n    case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:\n        return encodings[0].compression.settings.size;\n    case MATROSKA_TRACK_ENCODING_COMP_LZO:\n        do {\n            olen = pkt_size *= 3;\n            pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);\n            result = av_lzo1x_decode(pkt_data, &olen, data, &isize);\n        } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);\n        if (result)\n            goto failed;\n        pkt_size -= olen;\n        break;\n#if CONFIG_ZLIB\n    case MATROSKA_TRACK_ENCODING_COMP_ZLIB: {\n        z_stream zstream = {0};\n        if (inflateInit(&zstream) != Z_OK)\n            return -1;\n        zstream.next_in = data;\n        zstream.avail_in = isize;\n        do {\n            pkt_size *= 3;\n            newpktdata = av_realloc(pkt_data, pkt_size);\n            if (!newpktdata) {\n                inflateEnd(&zstream);\n                goto failed;\n            }\n            pkt_data = newpktdata;\n            zstream.avail_out = pkt_size - zstream.total_out;\n            zstream.next_out = pkt_data + zstream.total_out;\n            result = inflate(&zstream, Z_NO_FLUSH);\n        } while (result==Z_OK && pkt_size<10000000);\n        pkt_size = zstream.total_out;\n        inflateEnd(&zstream);\n        if (result != Z_STREAM_END)\n            goto failed;\n        break;\n    }\n#endif\n#if CONFIG_BZLIB\n    case MATROSKA_TRACK_ENCODING_COMP_BZLIB: {\n        bz_stream bzstream = {0};\n        if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)\n            return -1;\n        bzstream.next_in = data;\n        bzstream.avail_in = isize;\n        do {\n            pkt_size *= 3;\n            newpktdata = av_realloc(pkt_data, pkt_size);\n            if (!newpktdata) {\n                BZ2_bzDecompressEnd(&bzstream);\n                goto failed;\n            }\n            pkt_data = newpktdata;\n            bzstream.avail_out = pkt_size - bzstream.total_out_lo32;\n            bzstream.next_out = pkt_data + bzstream.total_out_lo32;\n            result = BZ2_bzDecompress(&bzstream);\n        } while (result==BZ_OK && pkt_size<10000000);\n        pkt_size = bzstream.total_out_lo32;\n        BZ2_bzDecompressEnd(&bzstream);\n        if (result != BZ_STREAM_END)\n            goto failed;\n        break;\n    }\n#endif\n    default:\n        return -1;\n    }\n    *buf = pkt_data;\n    *buf_size = pkt_size;\n    return 0;\n failed:\n    av_free(pkt_data);\n    return -1;\n}', 'void *av_realloc(void *ptr, size_t size)\n{\n#if CONFIG_MEMALIGN_HACK\n    int diff;\n#endif\n    if(size > (INT_MAX-16) )\n        return NULL;\n#if CONFIG_MEMALIGN_HACK\n    if(!ptr) return av_malloc(size);\n    diff= ((char*)ptr)[-1];\n    return (char*)realloc((char*)ptr - diff, size + diff) + diff;\n#else\n    return realloc(ptr, size);\n#endif\n}']