The last user of .tunnel_sock is pppol2tp_connect() which defensively
uses it to verify internal data consistency.
This check isn't necessary: l2tp_session_get() guarantees that the
returned session belongs to the tunnel passed as parameter. And
.tunnel_sock is never updated, so checking that it still points to
the parent tunnel socket is useless; that test can never fail.
Signed-off-by: Guillaume Nault <g.na...@alphalink.fr>
---
net/l2tp/l2tp_ppp.c | 10 ----------
1 file changed, 10 deletions(-)
diff --git a/net/l2tp/l2tp_ppp.c b/net/l2tp/l2tp_ppp.c
index 88b4cb1b7cde..b412fc3351dc 100644
--- a/net/l2tp/l2tp_ppp.c
+++ b/net/l2tp/l2tp_ppp.c
@@ -127,8 +127,6 @@ struct pppol2tp_session {
* PPPoX socket */
struct sock *__sk; /* Copy of .sk, for cleanup */
struct rcu_head rcu; /* For asynchronous release */
- struct sock *tunnel_sock; /* Pointer to the tunnel UDP
- * socket */
int flags; /* accessed by PPPIOCGFLAGS.
* Unused. */
};
@@ -592,7 +590,6 @@ static void pppol2tp_session_init(struct l2tp_session
*session)
ps = l2tp_session_priv(session);
mutex_init(&ps->sk_lock);
- ps->tunnel_sock = session->tunnel->sock;
ps->owner = current->pid;
/* If PMTU discovery was enabled, use the MTU that was discovered */
@@ -743,13 +740,6 @@ static int pppol2tp_connect(struct socket *sock, struct
sockaddr *uservaddr,
error = -EEXIST;
goto end;
}
-
- /* consistency checks */
- if (ps->tunnel_sock != tunnel->sock) {
- mutex_unlock(&ps->sk_lock);
- error = -EEXIST;
- goto end;
- }
} else {
/* Default MTU must allow space for UDP/L2TP/PPP headers */
cfg.mtu = 1500 - PPPOL2TP_HEADER_OVERHEAD;
--
2.11.0
