diff options
| -rw-r--r-- | libavcodec/shorten.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/libavcodec/shorten.c b/libavcodec/shorten.c index 80b1b4dba5..8f7436e0a9 100644 --- a/libavcodec/shorten.c +++ b/libavcodec/shorten.c @@ -482,9 +482,15 @@ static int shorten_decode_frame(AVCodecContext *avctx, case FN_BITSHIFT: s->bitshift = get_ur_golomb_shorten(&s->gb, BITSHIFTSIZE); break; - case FN_BLOCKSIZE: - s->blocksize = get_uint(s, av_log2(s->blocksize)); + case FN_BLOCKSIZE: { + int blocksize = get_uint(s, av_log2(s->blocksize)); + if (blocksize > s->blocksize) { + av_log(avctx, AV_LOG_ERROR, "Increasing block size is not supported\n"); + return AVERROR_PATCHWELCOME; + } + s->blocksize = blocksize; break; + } case FN_QUIT: *data_size = 0; return buf_size; |