netdev - [PATCH] pppoe: drop PPPOX_ZOMBIEs in pppoe

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Message-ID: <CANEcBPR8EvBTsJ0tG+kqvn578qXnqTMwdciS_WChe9sm5yKdaw@mail.gmail.com>
Date:	Sat, 22 Sep 2012 18:09:32 +0800
From:	Xiaodong Xu <stid.smth@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	netdev@...r.kernel.org
Subject: [PATCH] pppoe: drop PPPOX_ZOMBIEs in pppoe_release

From: Xiaodong Xu <stid.smth@...il.com>

When PPPOE is running over a virtual ethernet interface (e.g., a
bonding interface) and the user tries to delete the interface in case
the PPPOE state is ZOMBIE, the kernel will loop forever while
unregistering net_device for the reference count is not decreased to
zero which should have been done with dev_put().

Signed-off-by: Xiaodong Xu <stid.smth@...il.com>

---

--- linux/drivers/net/ppp/pppoe.c.orig	2012-09-19 11:49:27.921826868 +0800
+++ linux/drivers/net/ppp/pppoe.c	2012-09-22 17:44:03.642730082 +0800
@@ -570,7 +570,7 @@ static int pppoe_release(struct socket *

 	po = pppox_sk(sk);

-	if (sk->sk_state & (PPPOX_CONNECTED | PPPOX_BOUND)) {
+	if (sk->sk_state & (PPPOX_CONNECTED | PPPOX_BOUND | PPPOX_ZOMBIE)) {
 		dev_put(po->pppoe_dev);
 		po->pppoe_dev = NULL;
 	}

-- 
Regards,
Xiaodong Xu
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