From: Eric Dumazet <edumazet@google.com>
Date: Mon, 24 Sep 2012 07:00:11 +0000 (+0000)
Subject: net: guard tcp_set_keepalive() to tcp sockets
X-Git-Tag: v2.6.34.15~170
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5b377aafbb0b58c2a87f9fdae44c649aa4d79272;p=thirdparty%2Fkernel%2Fstable.git

net: guard tcp_set_keepalive() to tcp sockets

commit 3e10986d1d698140747fcfc2761ec9cb64c1d582 upstream.

Its possible to use RAW sockets to get a crash in
tcp_set_keepalive() / sk_reset_timer()

Fix is to make sure socket is a SOCK_STREAM one.

Reported-by: Dave Jones <davej@redhat.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
---

diff --git a/net/core/sock.c b/net/core/sock.c
index 4b45ad8f6b9e3..8ad61ba17a39e 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -582,7 +582,8 @@ set_rcvbuf:
 
 	case SO_KEEPALIVE:
 #ifdef CONFIG_INET
-		if (sk->sk_protocol == IPPROTO_TCP)
+		if (sk->sk_protocol == IPPROTO_TCP &&
+		    sk->sk_type == SOCK_STREAM)
 			tcp_set_keepalive(sk, valbool);
 #endif
 		sock_valbool_flag(sk, SOCK_KEEPOPEN, valbool);