From 15e10c3d3b012342562035aa3c08ecc1cfd42c69 Mon Sep 17 00:00:00 2001
From: Martin Sustrik <sustrik@250bpm.com>
Date: Thu, 16 Feb 2012 10:29:16 +0900
Subject: Some additional parameter checking for ZMQ_(UN)SUBSCRIBE

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
---
 src/sub.cpp | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src')

diff --git a/src/sub.cpp b/src/sub.cpp
index ad55ea3..94bb20d 100644
--- a/src/sub.cpp
+++ b/src/sub.cpp
@@ -44,6 +44,11 @@ int xs::sub_t::xsetsockopt (int option_, const void *optval_,
         return -1;
     }
 
+    if (optvallen_ > 0 && !optval_) {
+        errno = EFAULT;
+        return -1;
+    }
+
     //  Create the subscription message.
     msg_t msg;
     int rc = msg.init_size (optvallen_ + 1);
-- 
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