[FFmpeg-cvslog] avcodec/speedhq: Width < 8 is not supported

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Wed Mar 17 13:14:39 2021 +0100| [462b8261aa3c4f9844b2e050c74b9a2018e3649d] | committer: Michael Niedermayer

avcodec/speedhq: Width < 8 is not supported

Fixes: out of array access
Fixes: 31733/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SPEEDHQ_fuzzer-4704307963363328
Fixes: 31736/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SPEEDHQ_fuzzer-6190960292790272

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=462b8261aa3c4f9844b2e050c74b9a2018e3649d
---

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

diff --git a/libavcodec/speedhq.c b/libavcodec/speedhq.c
index 5861b7f6b5..711bcd66d7 100644
--- a/libavcodec/speedhq.c
+++ b/libavcodec/speedhq.c
@@ -498,7 +498,7 @@ static int speedhq_decode_frame(AVCodecContext *avctx,
     uint32_t second_field_offset;
     int ret;
 
-    if (buf_size < 4)
+    if (buf_size < 4 || avctx->width < 8)
         return AVERROR_INVALIDDATA;
 
     quality = buf[0];