From 2632616bc484de9281bc2a1f5b033325783f8a10 Mon Sep 17 00:00:00 2001
From: Eric Dumazet <edumazet@google.com>
Date: Fri, 13 May 2016 06:14:37 -0700
Subject: sock: propagate __sock_cmsg_send() error

__sock_cmsg_send() might return different error codes, not only -EINVAL.

Fixes: 24025c465f77 ("ipv4: process socket-level control messages in IPv4")
Fixes: ad1e46a83716 ("ipv6: process socket-level control messages in IPv6")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Soheil Hassas Yeganeh <soheil@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index 5805762..71a52f4d 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -247,8 +247,9 @@ int ip_cmsg_send(struct sock *sk, struct msghdr *msg, struct ipcm_cookie *ipc,
 		}
 #endif
 		if (cmsg->cmsg_level == SOL_SOCKET) {
-			if (__sock_cmsg_send(sk, msg, cmsg, &ipc->sockc))
-				return -EINVAL;
+			err = __sock_cmsg_send(sk, msg, cmsg, &ipc->sockc);
+			if (err)
+				return err;
 			continue;
 		}
 
diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c
index 00d0c29..37874e2 100644
--- a/net/ipv6/datagram.c
+++ b/net/ipv6/datagram.c
@@ -746,8 +746,9 @@ int ip6_datagram_send_ctl(struct net *net, struct sock *sk,
 		}
 
 		if (cmsg->cmsg_level == SOL_SOCKET) {
-			if (__sock_cmsg_send(sk, msg, cmsg, sockc))
-				return -EINVAL;
+			err = __sock_cmsg_send(sk, msg, cmsg, sockc);
+			if (err)
+				return err;
 			continue;
 		}
 
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