From 4a660fac9899191d4121cde02f2a98977b1303b6 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Tue, 24 Sep 2019 01:43:35 +0200 Subject: [PATCH] avcodec/truemotion1: Check that the input has enough space for a minimal index_stream Fixes: Timeout (18sec -> 0.4sec) Fixes: 17585/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TRUEMOTION1_fuzzer-5117015135617024 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/truemotion1.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavcodec/truemotion1.c b/libavcodec/truemotion1.c index bcfe473852..b6481cbd7c 100644 --- a/libavcodec/truemotion1.c +++ b/libavcodec/truemotion1.c @@ -444,6 +444,8 @@ static int truemotion1_decode_header(TrueMotion1Context *s) if (s->flags & FLAG_KEYFRAME) { /* no change bits specified for a keyframe; only index bytes */ s->index_stream = s->mb_change_bits; + if (s->avctx->width * s->avctx->height / 2048 + header.header_size > s->size) + return AVERROR_INVALIDDATA; } else { /* one change bit per 4x4 block */ s->index_stream = s->mb_change_bits +