[FFmpeg-cvslog] avcodec/indeo5: Do not leave frame_type set to an invalid value

[Michael Niedermayer]

ffmpeg | branch: release/3.0 | Michael Niedermayer <michael at niedermayer.cc> | Fri Jan 26 00:24:49 2018 +0100| [c1a133b610def6b920e9a3dcd0bc9b7771e685a4] | committer: Michael Niedermayer

avcodec/indeo5: Do not leave frame_type set to an invalid value

Fixes: null pointer dereference
Fixes: 5264/clusterfuzz-testcase-minimized-4621956621008896

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 2ff9f178519b68d4d1d606eb5451ad81da948efc)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=c1a133b610def6b920e9a3dcd0bc9b7771e685a4
---

 libavcodec/indeo5.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libavcodec/indeo5.c b/libavcodec/indeo5.c
index 5f931c8b98..5028def4bc 100644
--- a/libavcodec/indeo5.c
+++ b/libavcodec/indeo5.c
@@ -324,6 +324,7 @@ static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx)
     ctx->frame_type      = get_bits(&ctx->gb, 3);
     if (ctx->frame_type >= 5) {
         av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d \n", ctx->frame_type);
+        ctx->frame_type = FRAMETYPE_INTRA;
         return AVERROR_INVALIDDATA;
     }