From: David Teigland <teigland@redhat.com>
Date: Thu, 29 Nov 2007 10:25:26 -0600
Subject: [dlm] zero unused parts of sockaddr_storage
Message-id: 20071129162526.GB8513@redhat.com
O-Subject: [RHEL5.2 PATCH] dlm: zero unused parts of sockaddr_storage
Bugzilla: 358771

bz 358771

When we build a sockaddr_storage for an IP address, clear the unused parts as
they could be used for node comparisons.

I have seen this occasionally make sctp connections fail.

Signed-Off-By: Patrick Caulfield <pcaulfie@redhat.com>

Upstream commit
http://git.kernel.org/gitweb.cgi?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=01c8cab25863de007fe8c598d0033919ea8ae65e

Acked-by: Bob Peterson <rpeterso@redhat.com>

diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index d7be4b4..2e81536 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -313,6 +313,7 @@ static void make_sockaddr(struct sockaddr_storage *saddr, uint16_t port,
 		in6_addr->sin6_port = cpu_to_be16(port);
 		*addr_len = sizeof(struct sockaddr_in6);
 	}
+	memset((char *)saddr + *addr_len, 0, sizeof(struct sockaddr_storage) - *addr_len);
 }
 
 /* Close a remote connection and tidy up */