From d276bc6a82fb2285eccd49ad3665988a0a19040b Mon Sep 17 00:00:00 2001
From: Matthias Vogelgesang <matthias.vogelgesang@kit.edu>
Date: Fri, 24 Feb 2017 16:29:20 +0100
Subject: Require at least a 4K block for decoding

---
 src/ufodecode.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ufodecode.c b/src/ufodecode.c
index a00ac9f..a3c07ec 100644
--- a/src/ufodecode.c
+++ b/src/ufodecode.c
@@ -531,7 +531,7 @@ ufo_decoder_get_next_frame (UfoDecoder *decoder, uint16_t **pixels, UfoDecoderMe
     if (pixels == NULL)
         return 0;
 
-    if (pos >= num_words)
+    if ((pos >= num_words) || ((num_words - pos) < 4096))
         return EIO;
 
     if (num_words < 16)
-- 
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