From a9fb2f8c80d4c76854773bf654175573942312a9 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Mon, 15 Jan 2018 19:03:48 +0100 Subject: [PATCH] avcodec/ulti: Check number of blocks at init Fixes: Timeout Fixes: 4832/clusterfuzz-testcase-4699096590843904 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit 725353525e73bbe5b6b4d01528252675f2417a02) Signed-off-by: Michael Niedermayer --- libavcodec/ulti.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavcodec/ulti.c b/libavcodec/ulti.c index e6f4374981..9e4c088b10 100644 --- a/libavcodec/ulti.c +++ b/libavcodec/ulti.c @@ -50,6 +50,8 @@ static av_cold int ulti_decode_init(AVCodecContext *avctx) s->width = avctx->width; s->height = avctx->height; s->blocks = (s->width / 8) * (s->height / 8); + if (s->blocks == 0) + return AVERROR_INVALIDDATA; avctx->pix_fmt = AV_PIX_FMT_YUV410P; s->ulti_codebook = ulti_codebook;