linux-kernel - [PATCH] [92/99] net/ipv4: Check for mistakenly passed in non-IPv4 address

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Message-Id: <20110727214931.EC7142403FF@tassilo.jf.intel.com>
Date:	Wed, 27 Jul 2011 14:49:31 -0700 (PDT)
From:	Andi Kleen <andi@...stfloor.org>
To:	meissner@...e.de, max@...e.de, davem@...emloft.net, gregkh@...e.de,
	ak@...ux.intel.com, linux-kernel@...r.kernel.org,
	stable@...nel.org, tim.bird@...sony.com
Subject: [PATCH] [92/99] net/ipv4: Check for mistakenly passed in non-IPv4 address

2.6.35-longterm review patch.  If anyone has any objections, please let me know.

------------------

From: Marcus Meissner <meissner@...e.de>

[ Upstream commit d0733d2e29b652b2e7b1438ececa732e4eed98eb ]

Check against mistakenly passing in IPv6 addresses (which would result
in an INADDR_ANY bind) or similar incompatible sockaddrs.

Signed-off-by: Marcus Meissner <meissner@...e.de>
Cc: Reinhard Max <max@...e.de>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
Signed-off-by: Andi Kleen <ak@...ux.intel.com>

---
 net/ipv4/af_inet.c |    3 +++
 1 file changed, 3 insertions(+)

Index: linux-2.6.35.y/net/ipv4/af_inet.c
===================================================================
--- linux-2.6.35.y.orig/net/ipv4/af_inet.c
+++ linux-2.6.35.y/net/ipv4/af_inet.c
@@ -464,6 +464,9 @@ int inet_bind(struct socket *sock, struc
 	if (addr_len < sizeof(struct sockaddr_in))
 		goto out;
 
+	if (addr->sin_family != AF_INET)
+		goto out;
+
 	chk_addr_ret = inet_addr_type(sock_net(sk), addr->sin_addr.s_addr);
 
 	/* Not specified by any standard per-se, however it breaks too
--
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