From mboxrd@z Thu Jan 1 00:00:00 1970 From: Greg Kroah-Hartman Subject: [PATCH 3.14 64/73] net/ping: handle protocol mismatching scenario Date: Fri, 5 Dec 2014 14:45:10 -0800 Message-ID: <20141205224435.849117278@linuxfoundation.org> References: <20141205224433.921659956@linuxfoundation.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Cc: Greg Kroah-Hartman , stable@vger.kernel.org, "David S. Miller" , Alexey Kuznetsov , James Morris , Hideaki YOSHIFUJI , Patrick McHardy , netdev@vger.kernel.org, Jane Zhou , Yiwei Zhao To: linux-kernel@vger.kernel.org Return-path: In-Reply-To: <20141205224433.921659956@linuxfoundation.org> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org 3.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jane Zhou commit 91a0b603469069cdcce4d572b7525ffc9fd352a6 upstream. ping_lookup() may return a wrong sock if sk_buff's and sock's protocols dont' match. For example, sk_buff's protocol is ETH_P_IPV6, but sock's sk_family is AF_INET, in that case, if sk->sk_bound_dev_if is zero, a wrong sock will be returned. the fix is to "continue" the searching, if no matching, return NULL. Cc: "David S. Miller" Cc: Alexey Kuznetsov Cc: James Morris Cc: Hideaki YOSHIFUJI Cc: Patrick McHardy Cc: netdev@vger.kernel.org Signed-off-by: Jane Zhou Signed-off-by: Yiwei Zhao Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/ipv4/ping.c | 2 ++ 1 file changed, 2 insertions(+) --- a/net/ipv4/ping.c +++ b/net/ipv4/ping.c @@ -217,6 +217,8 @@ static struct sock *ping_lookup(struct n &ipv6_hdr(skb)->daddr)) continue; #endif + } else { + continue; } if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)