From fc8eb4c1f9847b0a465bab5cfbcc8069e9e6b308 Mon Sep 17 00:00:00 2001
From: Lukasz Marek <lukasz.m.luki@gmail.com>
Date: Fri, 4 Apr 2014 19:28:45 +0200
Subject: [PATCH] lavu/opt: validate range before dereference

This change make error handling simplier.
av_opt_freep_ranges may be called when some ranges are NULL,
for example after memory allocation fail.

Signed-off-by: Lukasz Marek <lukasz.m.luki@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 3aac5fcfa9d3748659d78ab2a66d0ccce22cfd4f)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
 libavutil/opt.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/libavutil/opt.c b/libavutil/opt.c
index 652a2ddbb3..64901f2736 100644
--- a/libavutil/opt.c
+++ b/libavutil/opt.c
@@ -1599,8 +1599,10 @@ void av_opt_freep_ranges(AVOptionRanges **rangesp)
 
     for (i = 0; i < ranges->nb_ranges; i++) {
         AVOptionRange *range = ranges->range[i];
-        av_freep(&range->str);
-        av_freep(&ranges->range[i]);
+        if (range) {
+            av_freep(&range->str);
+            av_freep(&ranges->range[i]);
+        }
     }
     av_freep(&ranges->range);
     av_freep(rangesp);