diff options
| -rw-r--r-- | libavcodec/libvorbisdec.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/libavcodec/libvorbisdec.c b/libavcodec/libvorbisdec.c index 89cbbb41b6..3c53b8fdaf 100644 --- a/libavcodec/libvorbisdec.c +++ b/libavcodec/libvorbisdec.c @@ -64,22 +64,25 @@ static int oggvorbis_decode_init(AVCodecContext *avccontext) { } } else if(*p == 2) { unsigned int offset = 1; + unsigned int sizesum = 1; p++; for(i=0; i<2; i++) { hsizes[i] = 0; - while((*p == 0xFF) && (offset < avccontext->extradata_size)) { + while((*p == 0xFF) && (sizesum < avccontext->extradata_size)) { hsizes[i] += 0xFF; offset++; + sizesum += 1 + 0xFF; p++; } - if(offset >= avccontext->extradata_size - 1) { + hsizes[i] += *p; + offset++; + sizesum += 1 + *p; + if(sizesum > avccontext->extradata_size) { av_log(avccontext, AV_LOG_ERROR, "vorbis header sizes damaged\n"); ret = AVERROR_INVALIDDATA; goto error; } - hsizes[i] += *p; - offset++; p++; } hsizes[2] = avccontext->extradata_size - hsizes[0]-hsizes[1]-offset; |