Message ID | 20190219200924.3179-3-michael@niedermayer.cc |
---|---|
State | Accepted |
Commit | 976dae8b32f48d17cccfd6b19d2beb01770dfa7c |
Headers | show |
diff --git a/libavcodec/wcmv.c b/libavcodec/wcmv.c index f03761b343..2988c15b23 100644 --- a/libavcodec/wcmv.c +++ b/libavcodec/wcmv.c @@ -56,11 +56,13 @@ static int decode_frame(AVCodecContext *avctx, } bytestream2_init(&gb, avpkt->data, avpkt->size); + blocks = bytestream2_get_le16(&gb); + if (!blocks) + return avpkt->size; if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0) return ret; - blocks = bytestream2_get_le16(&gb); if (blocks > 5) { GetByteContext bgb; int x = 0, size;
Improves speed of the testcase by about a factor of 10 Fixes: Timeout Fixes: 13132/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WCMV_fuzzer-5664190616829952 Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> --- libavcodec/wcmv.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)