netdev - [PATCH net-next] soreuseport: fix merge conflict in tcp bind

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Date:	Mon, 22 Feb 2016 10:45:29 -0500
From:	Craig Gallek <kraigatgoog@...il.com>
To:	netdev@...r.kernel.org, David Miller <davem@...emloft.net>
Cc:	eric.dumazet@...il.com
Subject: [PATCH net-next] soreuseport: fix merge conflict in tcp bind

From: Craig Gallek <kraig@...gle.com>

One of the validation checks for the new array-based TCP SO_REUSEPORT
validation was unintentionally dropped in ea8add2b1903.  This adds it back.

Lack of this check allows the user to allocate multiple sock_reuseport
structures (leaking all but the first).

Fixes: ea8add2b1903 ("tcp/dccp: better use of ephemeral ports in bind()")
Signed-off-by: Craig Gallek <kraig@...gle.com>
---
 net/ipv4/inet_connection_sock.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index 3d28c6d5c3c3..fb0349acbd45 100644
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -202,6 +202,7 @@ tb_found:
 
 		if (((tb->fastreuse > 0 && reuse) ||
 		     (tb->fastreuseport > 0 &&
+		      !rcu_access_pointer(sk->sk_reuseport_cb) &&
 		      sk->sk_reuseport && uid_eq(tb->fastuid, uid))) &&
 		    smallest_size == -1)
 			goto success;
-- 
2.7.0.rc3.207.g0ac5344