This is a note to let you know that I've just added the patch titled
irda: Free skb on irda_accept error path.
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
irda-free-skb-on-irda_accept-error-path.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 8ab86c00e349cef9fb14719093a7f198bcc72629 Mon Sep 17 00:00:00 2001
From: "phil.turnbull@xxxxxxxxxx" <phil.turnbull@xxxxxxxxxx>
Date: Thu, 15 Sep 2016 12:41:44 -0400
Subject: irda: Free skb on irda_accept error path.
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;
}
Patches currently in stable-queue which might be from phil.turnbull@xxxxxxxxxx are
queue-4.4/irda-free-skb-on-irda_accept-error-path.patch
