[FFmpeg-cvslog] avcodec/truemotion2rt: Fix rounding in input size check

[Michael Niedermayer]

ffmpeg | branch: release/4.1 | Michael Niedermayer <michael at niedermayer.cc> | Sat Nov 17 09:24:30 2018 +0100| [90db1e441fcd927a76690a7acf3f3225583d7b4e] | committer: Michael Niedermayer

avcodec/truemotion2rt: Fix rounding in input size check

Fixes: Timeout
Fixes: 11332/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TRUEMOTION2RT_fuzzer-5678456612847616

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 7f22a4ebc97817fd0968f5ea8295c9a59a6292e0)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=90db1e441fcd927a76690a7acf3f3225583d7b4e
---

 libavcodec/truemotion2rt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/truemotion2rt.c b/libavcodec/truemotion2rt.c
index 9df0b527bb..e3ab998fda 100644
--- a/libavcodec/truemotion2rt.c
+++ b/libavcodec/truemotion2rt.c
@@ -116,7 +116,7 @@ static int truemotion2rt_decode_frame(AVCodecContext *avctx, void *data,
     if (ret < 0)
         return ret;
 
-    if (avctx->width / s->hscale * avctx->height * s->delta_size > avpkt->size * 8LL * 4)
+    if ((avctx->width + s->hscale - 1)/ s->hscale * avctx->height * s->delta_size > avpkt->size * 8LL * 4)
         return AVERROR_INVALIDDATA;
 
     ret = init_get_bits8(gb, avpkt->data + ret, avpkt->size - ret);