[FFmpeg-cvslog] avcodec/vp8_parser: Do not leave data/size uninitialized

[Michael Niedermayer]

ffmpeg | branch: release/3.3 | Michael Niedermayer <michael at niedermayer.cc> | Fri Jul  6 12:01:46 2018 +0200| [68fb93be04a40b9a90f7d118e459f9c09be3c913] | committer: Michael Niedermayer

avcodec/vp8_parser: Do not leave data/size uninitialized

This is identical to what the VP9 parser does

Fixes: 9215/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_LIBVPX_VP8_fuzzer-5768227253649408
Fixes: out of memory access

This may also fix oss fuzz issue 9212

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 284dde24dab30225ed3e233b0e5908d67d7e13e7)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=68fb93be04a40b9a90f7d118e459f9c09be3c913
---

 libavcodec/vp8_parser.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavcodec/vp8_parser.c b/libavcodec/vp8_parser.c
index 609f5077d1..e2d91b271f 100644
--- a/libavcodec/vp8_parser.c
+++ b/libavcodec/vp8_parser.c
@@ -28,6 +28,9 @@ static int parse(AVCodecParserContext *s,
     unsigned int frame_type;
     unsigned int profile;
 
+    *poutbuf      = buf;
+    *poutbuf_size = buf_size;
+
     if (buf_size < 3)
         return buf_size;