From a7aae21ad0506972cade99171949aeeabb86d3cd Mon Sep 17 00:00:00 2001
From: gpoirier <gpoirier@b3059339-0415-0410-9bf9-f77b7e298cf2>
Date: Sat, 8 Sep 2007 14:43:10 +0000
Subject: Add a check for c->head being NULL in pullup_free_context(). This
 fixes crashes when an invalid filter chain is built Patch by Alexander
 Strange % astrange A ithinksw P com % Original thread: date: Sep 7, 2007 8:47
 PM subject: [MPlayer-dev-eng] [PATCH] crash in pullup with invalid filters

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@24370 b3059339-0415-0410-9bf9-f77b7e298cf2
---
 libmpcodecs/pullup.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'libmpcodecs')

diff --git a/libmpcodecs/pullup.c b/libmpcodecs/pullup.c
index 006934fc6f..04f2106572 100644
--- a/libmpcodecs/pullup.c
+++ b/libmpcodecs/pullup.c
@@ -795,6 +795,7 @@ void pullup_free_context(struct pullup_context *c)
 	free(c->buffers);
 	f = c->head;
 	do {
+		if (!f) break;
 		free(f->diffs);
 		free(f->comb);
 		f = f->next;
-- 
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