irda: Free skb on irda_accept error path.

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@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/irda/af_irda.c b/net/irda/af_irda.c
index 8d2f7c9..ccc2444 100644 (file)
--- a/net/irda/af_irda.c
+++ b/net/irda/af_irda.c
@@ -832,7 +832,7 @@ static int irda_accept(struct socket *sock, struct socket *newsock, int flags)
        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);
@@ -900,7 +900,6 @@ static int irda_accept(struct socket *sock, struct socket *newsock, int flags)
        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;
        }
 
@@ -919,7 +918,6 @@ static int irda_accept(struct socket *sock, struct socket *newsock, int flags)
        /* 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;
@@ -927,6 +925,7 @@ static int irda_accept(struct socket *sock, struct socket *newsock, int flags)
        irda_connect_response(new);
        err = 0;
 out:
+       kfree_skb(skb);
        release_sock(sk);
        return err;
 }