From 7e4f32f4e4b93c95dcc872cb844c5548e69f352e Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Thu, 23 Feb 2017 15:19:32 +0100
Subject: [PATCH] avutil/frame: Disallow zero sized frame side data

There should be no case that needs this and its a potential for
creating corner cases

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavutil/frame.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavutil/frame.c b/libavutil/frame.c
index 8811dcdcfe..69ee240758 100644
--- a/libavutil/frame.c
+++ b/libavutil/frame.c
@@ -668,6 +668,8 @@ AVFrameSideData *av_frame_new_side_data(AVFrame *frame,
                                         enum AVFrameSideDataType type,
                                         int size)
 {
+    if (size <= 0)
+        return NULL;
 
     return frame_new_side_data(frame, type, av_buffer_alloc(size));
 }