From 17603094d57faf95bee00d557fe6de84a05352ef Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Thu, 17 Oct 2019 23:57:26 +0200 Subject: [PATCH] avcodec/rasc: Check input size in decode_fint() Fixes: Timeout (11sec -> 42ms) Fixes: 18287/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_RASC_fuzzer-5637866331308032 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/rasc.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavcodec/rasc.c b/libavcodec/rasc.c index 21fc43f325..cdf20a6db9 100644 --- a/libavcodec/rasc.c +++ b/libavcodec/rasc.c @@ -124,6 +124,8 @@ static int decode_fint(AVCodecContext *avctx, clear_plane(avctx, s->frame1); return 0; } + if (bytestream2_get_bytes_left(gb) < 72) + return AVERROR_INVALIDDATA; bytestream2_skip(gb, 8); w = bytestream2_get_le32(gb);