[PATCH 4.4 095/312] irda: Free skb on irda_accept error path.

[Greg Kroah-Hartman]

From: phil.turnbull@xxxxxxxxxx <phil.turnbull@xxxxxxxxxx>

commit 8ab86c00e349cef9fb14719093a7f198bcc72629 upstream.

skb is not freed if newsk is NULL. Rework the error path so free_skb is
unconditionally called on function exit.

Fixes: c3ea9fa27413 ("[IrDA] af_irda: IRDA_ASSERT cleanups")
Signed-off-by: Phil Turnbull <phil.turnbull@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 net/irda/af_irda.c |    5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

--- a/net/irda/af_irda.c
+++ b/net/irda/af_irda.c
@@ -839,7 +839,7 @@ static int irda_accept(struct socket *so
 	struct sock *sk = sock->sk;
 	struct irda_sock *new, *self = irda_sk(sk);
 	struct sock *newsk;
-	struct sk_buff *skb;
+	struct sk_buff *skb = NULL;
 	int err;
 
 	err = irda_create(sock_net(sk), newsock, sk->sk_protocol, 0);
@@ -907,7 +907,6 @@ static int irda_accept(struct socket *so
 	err = -EPERM; /* value does not seem to make sense. -arnd */
 	if (!new->tsap) {
 		pr_debug("%s(), dup failed!\n", __func__);
-		kfree_skb(skb);
 		goto out;
 	}
 
@@ -926,7 +925,6 @@ static int irda_accept(struct socket *so
 	/* Clean up the original one to keep it in listen state */
 	irttp_listen(self->tsap);
 
-	kfree_skb(skb);
 	sk->sk_ack_backlog--;
 
 	newsock->state = SS_CONNECTED;
@@ -934,6 +932,7 @@ static int irda_accept(struct socket *so
 	irda_connect_response(new);
 	err = 0;
 out:
+	kfree_skb(skb);
 	release_sock(sk);
 	return err;
 }