[FFmpeg-cvslog] avcodec/rasc: unref both frames on reinit

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Tue Oct  2 03:04:52 2018 +0200| [f515c978f63f818d22d94eac9b6ba47f762e6ad9] | committer: Michael Niedermayer

avcodec/rasc: unref both frames on reinit

Fixes: integer overflow
Fixes: inconsistent frame dimensions
Fixes: 10454/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_RASC_fuzzer-5656301162463232

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda at gmail.com>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f515c978f63f818d22d94eac9b6ba47f762e6ad9
---

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

diff --git a/libavcodec/rasc.c b/libavcodec/rasc.c
index eb021681c6..e8e0740ddd 100644
--- a/libavcodec/rasc.c
+++ b/libavcodec/rasc.c
@@ -95,10 +95,10 @@ static int init_frames(AVCodecContext *avctx)
     int ret;
 
     av_frame_unref(s->frame1);
+    av_frame_unref(s->frame2);
     if ((ret = ff_get_buffer(avctx, s->frame1, 0)) < 0)
         return ret;
 
-    av_frame_unref(s->frame2);
     if ((ret = ff_get_buffer(avctx, s->frame2, 0)) < 0)
         return ret;