From 2ffbe0345dd606cffcc30cbfce437762f5fcb496 Mon Sep 17 00:00:00 2001
From: akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 9 May 2013 13:01:08 +0000
Subject: * ext/socket/ancdata.c (bsock_sendmsg_internal): controls_num should 
  not be negative.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40626 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ext/socket/ancdata.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'ext/socket/ancdata.c')

diff --git a/ext/socket/ancdata.c b/ext/socket/ancdata.c
index db5e7fd657..3e6431ebbf 100644
--- a/ext/socket/ancdata.c
+++ b/ext/socket/ancdata.c
@@ -1153,7 +1153,7 @@ bsock_sendmsg_internal(int argc, VALUE *argv, VALUE sock, int nonblock)
     data = argv[0];
     if (1 < argc) vflags = argv[1];
     if (2 < argc) dest_sockaddr = argv[2];
-    controls_num = argc - 3;
+    controls_num = 3 < argc ? argc - 3 : 0;
 #if defined(HAVE_STRUCT_MSGHDR_MSG_CONTROL)
     if (3 < argc) { controls_ptr = &argv[3]; }
 #endif
-- 
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