From: Tom Parkin <tparkin@katalix.com>
Date: Tue, 19 Mar 2013 06:11:17 +0000 (+0000)
Subject: l2tp: take a reference for kernel sockets in l2tp_tunnel_sock_lookup
X-Git-Tag: Ubuntu-5.13.0-19.19~22632^2~27^2~6
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=8abbbe8ff572fd84d1b98eb9acf30611a97cf72e;p=mirror_ubuntu-jammy-kernel.git

l2tp: take a reference for kernel sockets in l2tp_tunnel_sock_lookup

When looking up the tunnel socket in struct l2tp_tunnel, hold a reference
whether the socket was created by the kernel or by userspace.

Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/l2tp/l2tp_core.c b/net/l2tp/l2tp_core.c
index 0dd50c079f29..45373fee38c5 100644
--- a/net/l2tp/l2tp_core.c
+++ b/net/l2tp/l2tp_core.c
@@ -191,6 +191,7 @@ struct sock *l2tp_tunnel_sock_lookup(struct l2tp_tunnel *tunnel)
 	} else {
 		/* Socket is owned by kernelspace */
 		sk = tunnel->sock;
+		sock_hold(sk);
 	}
 
 out:
@@ -209,6 +210,7 @@ void l2tp_tunnel_sock_put(struct sock *sk)
 		}
 		sock_put(sk);
 	}
+	sock_put(sk);
 }
 EXPORT_SYMBOL_GPL(l2tp_tunnel_sock_put);