From 97c78caf3e8f7ec4df3d3123b5e8d0e7541319e6 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Wed, 15 Apr 2020 20:27:27 +0200
Subject: [PATCH] avformat/thp: Require a video stream

The demuxer code assumes the existence of a video stream

Fixes: assertion failure
Fixes: 21512/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5699660783288320

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavformat/thp.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavformat/thp.c b/libavformat/thp.c
index 332ed79128..d3ae86c645 100644
--- a/libavformat/thp.c
+++ b/libavformat/thp.c
@@ -145,6 +145,9 @@ static int thp_read_header(AVFormatContext *s)
         }
     }
 
+    if (!thp->vst)
+        return AVERROR_INVALIDDATA;
+
     return 0;
 }