linux-kernel - [014/107] net/ipv4: Check for mistakenly passed in non-IPv4 address

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Message-Id: <20110708001654.128105432@clark.kroah.org>
Date:	Thu, 07 Jul 2011 17:15:46 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Marcus Meissner <meissner@...e.de>, Reinhard Max <max@...e.de>,
	"David S. Miller" <davem@...emloft.net>
Subject: [014/107] net/ipv4: Check for mistakenly passed in non-IPv4 address

2.6.39-stable review patch.  If anyone has any objections, please let us 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>
---
 net/ipv4/af_inet.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/net/ipv4/af_inet.c
+++ b/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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