netdev - [PATCH net] sunrpc: fix UDP memory accounting for v4.4 kernel

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Date:   Tue, 15 Oct 2019 07:21:41 +0000
From:   JABLONSKY Jan <Jan.JABLONSKY@...lesgroup.com>
To:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:     Trond Myklebust <trond.myklebust@...marydata.com>,
        Anna Schumaker <anna.schumaker@...app.com>,
        "J. Bruce Fields" <bfields@...ldses.org>,
        "Jeff Layton" <jlayton@...chiereds.net>,
        "David S. Miller" <davem@...emloft.net>,
        "linux-nfs@...r.kernel.org" <linux-nfs@...r.kernel.org>,
        Jan Stancek <jstancek@...hat.com>,
        Paolo Abeni <pabeni@...hat.com>
Subject: [PATCH net] sunrpc: fix UDP memory accounting for v4.4 kernel

The same warnings reported by Jan Stancek may appear also on 4.4
Based on Paolo Abeni's work.

WARNING: at net/ipv4/af_inet.c:155
CPU: 1 PID: 214 Comm: kworker/1:1H Not tainted 4.4.166 #1
Workqueue: rpciod .xprt_autoclose
task: c0000000366f57c0 ti: c000000034134000 task.ti: c000000034134000
NIP [c000000000662268] .inet_sock_destruct+0x158/0x200

Based on: "[net] sunrpc: fix UDP memory accounting"

Signed-off-by: Jan Jablonsky <jan.jablonsky@...lesgroup.com>
Signed-off-by: Paolo Abeni <pabeni@...hat.com>
Cc: Jan Stancek <jstancek@...hat.com>
---
 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 c9c0976d3bbb..72277cb9785e 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -1056,7 +1056,7 @@ static void xs_udp_data_receive(struct sock_xprt *transport)
 		if (skb == NULL)
 			break;
 		xs_udp_data_read_skb(&transport->xprt, sk, skb);
-		skb_free_datagram(sk, skb);
+		skb_free_datagram_locked(sk, skb);
 	}
 out:
 	mutex_unlock(&transport->recv_mutex);