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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Anna Schumaker <Anna.Schumaker@Netapp.com>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.10 081/306] sunrpc: Fix return value of get_srcport()
Date:   Thu, 16 Sep 2021 17:57:06 +0200
Message-Id: <20210916155756.813372821@linuxfoundation.org>
In-Reply-To: <20210916155753.903069397@linuxfoundation.org>
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From: Anna Schumaker <Anna.Schumaker@Netapp.com>

[ Upstream commit 5d46dd04cb68771f77ba66dbf6fd323a4a2ce00d ]

Since bc1c56e9bbe9 transport->srcport may by unset, causing
get_srcport() to return 0 when called. Fix this by querying the port
from the underlying socket instead of the transport.

Fixes: bc1c56e9bbe9 (SUNRPC: prevent port reuse on transports which don't request it)
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/sunrpc/xprtsock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 7d7c08af54de..16c7758e7bf3 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -1642,7 +1642,7 @@ static int xs_get_srcport(struct sock_xprt *transport)
 unsigned short get_srcport(struct rpc_xprt *xprt)
 {
 	struct sock_xprt *sock = container_of(xprt, struct sock_xprt, xprt);
-	return sock->srcport;
+	return xs_sock_getport(sock->sock);
 }
 EXPORT_SYMBOL(get_srcport);
 
-- 
2.30.2