From 4770eac663da306fc8298ff8b73ebeabdc23489c Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Fri, 19 Aug 2016 10:28:22 +0200
Subject: [PATCH] avformat/swfdec: Fix inflate() error code check
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Fixes infinite loop
Fixes endless.poc

Found-by: 连一汉 <lianyihan@360.cn>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit a453bbb68f3eec202673728988bba3bc76071761)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavformat/swfdec.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavformat/swfdec.c b/libavformat/swfdec.c
index fa2435e0a0..c6f5fe669e 100644
--- a/libavformat/swfdec.c
+++ b/libavformat/swfdec.c
@@ -119,10 +119,10 @@ retry:
     z->avail_out = buf_size;
 
     ret = inflate(z, Z_NO_FLUSH);
-    if (ret < 0)
-        return AVERROR(EINVAL);
     if (ret == Z_STREAM_END)
         return AVERROR_EOF;
+    if (ret != Z_OK)
+        return AVERROR(EINVAL);
 
     if (buf_size - z->avail_out == 0)
         goto retry;