From 86e3289ffdec88f771ce8ec039ef5b90eb70b4cd Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Sun, 25 Mar 2012 04:15:51 +0200
Subject: [PATCH] mov: fix heap buffer overflow

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
 libavformat/mov.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavformat/mov.c b/libavformat/mov.c
index 785d284b86..0e9566fe3a 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -1830,7 +1830,7 @@ static void mov_build_index(MOVContext *mov, AVStream *st)
 
         current_dts -= sc->dts_shift;
 
-        if (!sc->sample_count)
+        if (!sc->sample_count || st->nb_index_entries)
             return;
         if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries))
             return;