[FFmpeg-cvslog] avcodec/cfhd: Check transform type

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Fri Aug 28 00:17:41 2020 +0200| [659658d08bb2e7219001795c78efd24f381446e2] | committer: Michael Niedermayer

avcodec/cfhd: Check transform type

Fixes: out of array access
Fixes: 24823/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_CFHD_fuzzer-4855119863349248

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=659658d08bb2e7219001795c78efd24f381446e2
---

 libavcodec/cfhd.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libavcodec/cfhd.c b/libavcodec/cfhd.c
index d014aa2bb7..ea35f03869 100644
--- a/libavcodec/cfhd.c
+++ b/libavcodec/cfhd.c
@@ -490,6 +490,10 @@ static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame,
                 av_log(avctx, AV_LOG_ERROR, "Invalid transform type\n");
                 ret = AVERROR(EINVAL);
                 break;
+            } else if (data == 1) {
+                av_log(avctx, AV_LOG_ERROR, "unsupported transform type\n");
+                ret = AVERROR_PATCHWELCOME;
+                break;
             }
             s->transform_type = data;
             av_log(avctx, AV_LOG_DEBUG, "Transform type %"PRIu16"\n", data);