From 7dcbdcce4b33473f679594403b98bdda330b1b49 Mon Sep 17 00:00:00 2001
From: John Stebbins <jstebbins.hb@gmail.com>
Date: Tue, 15 Jan 2019 16:35:27 -0800
Subject: Fix potential NULL pointer dereference

---
 libhb/fifo.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

(limited to 'libhb')

diff --git a/libhb/fifo.c b/libhb/fifo.c
index 4288f5700..70c3eca81 100644
--- a/libhb/fifo.c
+++ b/libhb/fifo.c
@@ -450,8 +450,11 @@ void hb_buffer_realloc( hb_buffer_t * b, int size )
         {
             return;
         }
-        memcpy(tmp, b->data, b->alloc);
-        av_free(b->data);
+        if (b->data != NULL)
+        {
+            memcpy(tmp, b->data, b->alloc);
+            av_free(b->data);
+        }
         b->data  = tmp;
         b->alloc = size;
 
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