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From: Gleb Smirnoff <glebius@FreeBSD.org>
Date: Mon, 11 Mar 2013 13:05:12 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r248159 - head/lib/libnetgraph
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Author: glebius
Date: Mon Mar 11 13:05:11 2013
New Revision: 248159
URL: http://svnweb.freebsd.org/changeset/base/248159

Log:
  Fix for quite a special case when userland emulates a netgraph node, and
  userland can reply to a message with NGM_HASREPLY bit set. In this case
  we should not wait for a response to a responce.
  
  PR:		176771
  Submitted by:	Keith Reynolds <keith.reynolds tidalscale.com>

Modified:
  head/lib/libnetgraph/msg.c

Modified: head/lib/libnetgraph/msg.c
==============================================================================
--- head/lib/libnetgraph/msg.c	Mon Mar 11 12:22:44 2013	(r248158)
+++ head/lib/libnetgraph/msg.c	Mon Mar 11 13:05:11 2013	(r248159)
@@ -234,7 +234,7 @@ NgDeliverMsg(int cs, const char *path,
 	}
 
 	/* Wait for reply if there should be one. */
-	if (msg->header.cmd & NGM_HASREPLY) {
+	if (msg->header.cmd & NGM_HASREPLY && !(msg->header.flags & NGF_RESP)) {
 		struct pollfd rfds;
 		int n;