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Date:	Fri,  5 Dec 2014 14:45:10 -0800
From:	Greg Kroah-Hartman <>
Cc:	Greg Kroah-Hartman <>,, "David S. Miller" <>,
	Alexey Kuznetsov <>,
	James Morris <>,
	Hideaki YOSHIFUJI <>,
	Patrick McHardy <>,,
	Jane Zhou <>,
	Yiwei Zhao <>
Subject: [PATCH 3.14 64/73] net/ping: handle protocol mismatching scenario

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 <>
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
+		} else {
+			continue;
 		if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)

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