netdev - [PATCH 2/2] net: tls: allow MSG_CMSG

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Message-Id: <20200805122501.4856-2-r.czerwinski@pengutronix.de>
Date:   Wed,  5 Aug 2020 14:25:04 +0200
From:   Rouven Czerwinski <r.czerwinski@...gutronix.de>
To:     Boris Pismenny <borisp@...lanox.com>,
        Aviad Yehezkel <aviadye@...lanox.com>,
        John Fastabend <john.fastabend@...il.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>
Cc:     Rouven Czerwinski <r.czerwinski@...gutronix.de>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] net: tls: allow MSG_CMSG_COMPAT in sendmsg

The MSG_CMSG_COMPAT flag is valid if the system has CONFIG_COMPAT
enabled and a 32bit userspace.

Signed-off-by: Rouven Czerwinski <r.czerwinski@...gutronix.de>
---
 net/tls/tls_sw.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index 24f64bc0de18..a332ae123bda 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -935,7 +935,8 @@ int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size)
 	int ret = 0;
 	int pending;
 
-	if (msg->msg_flags & ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL))
+	if (msg->msg_flags & ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL |
+			       MSG_CMSG_COMPAT))
 		return -EOPNOTSUPP;
 
 	mutex_lock(&tls_ctx->tx_lock);
-- 
2.27.0