From ad19e7fe0adc99d5710eff1ed48d91a7b75a950e Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Thu, 12 Jul 2018 21:22:19 +0200
Subject: fix stack smashing issue reported by 54kinghuang@163.com as
 crash-19b19795b4eb9a0b31689ba9bf2c08d4c2de0621 on the mailinglist

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

diff --git a/src/common/unzip.c b/src/common/unzip.c
index 0de7778..a13f129 100644
--- a/src/common/unzip.c
+++ b/src/common/unzip.c
@@ -1347,7 +1347,7 @@ ec_read_file_func (voidpf opaque,
     {
       ret = ec->read (ec->cls,
 		      &ptr,
-		      size);
+		      size - done);
       if (ret <= 0)
 	return done;
       memcpy (buf + done, ptr, ret);
-- 
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