From 5d208aac52538e67d76c3fdd173e24ada876ca47 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Tue, 5 Mar 2019 00:48:18 +0100
Subject: [PATCH] avformat/gdv: Check fps

Fixes: Division by 0
Fixes: ffmpeg_zero_division.bin

Found-by: Anatoly Trosinenko <anatoly.trosinenko@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 38381400fca45d1ae6e7604335b507b7dc70a903)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavformat/gdv.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavformat/gdv.c b/libavformat/gdv.c
index a69c349cab..3ead383892 100644
--- a/libavformat/gdv.c
+++ b/libavformat/gdv.c
@@ -86,6 +86,9 @@ static int gdv_read_header(AVFormatContext *ctx)
     vst->nb_frames         = avio_rl16(pb);
 
     fps = avio_rl16(pb);
+    if (!fps)
+        return AVERROR_INVALIDDATA;
+
     snd_flags = avio_rl16(pb);
     if (snd_flags & 1) {
         ast = avformat_new_stream(ctx, 0);