From 946cd7df284175e5c36140349a4173ac64a76115 Mon Sep 17 00:00:00 2001
From: Corinna Vinschen <corinna@vinschen.de>
Date: Thu, 19 Jan 2017 21:11:22 +0100
Subject: [PATCH] check_iovec: Change test to be more robust against invalid
 iovcnt values

Stop running wild if iovcnt is < 0 to begin with.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
---
 winsup/cygwin/miscfuncs.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/winsup/cygwin/miscfuncs.cc b/winsup/cygwin/miscfuncs.cc
index e042d0082..63e60f0ef 100644
--- a/winsup/cygwin/miscfuncs.cc
+++ b/winsup/cygwin/miscfuncs.cc
@@ -60,7 +60,7 @@ check_iovec (const struct iovec *iov, int iovcnt, bool forwrite)
 
       size_t tot = 0;
 
-      while (iovcnt != 0)
+      while (iovcnt > 0)
 	{
 	  if (iov->iov_len > SSIZE_MAX || (tot += iov->iov_len) > SSIZE_MAX)
 	    {