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28 lines
885 B
28 lines
885 B
From: Felix Fietkau <nbd@openwrt.org>
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Date: Sat, 9 May 2015 23:08:38 +0200
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Subject: [PATCH] pppoe: drop pppoe device in pppoe_unbind_sock_work
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After receiving a PADT and the socket is closed, user space will no
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longer drop the reference to the pppoe device.
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This leads to errors like this:
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[ 488.570000] unregister_netdevice: waiting for eth0.2 to become free. Usage count = 2
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Fixes: 287f3a943fe ("pppoe: Use workqueue to die properly when a PADT is received")
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Signed-off-by: Felix Fietkau <nbd@openwrt.org>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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--- a/drivers/net/ppp/pppoe.c
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+++ b/drivers/net/ppp/pppoe.c
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@@ -465,6 +465,10 @@ static void pppoe_unbind_sock_work(struc
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struct sock *sk = sk_pppox(po);
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lock_sock(sk);
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+ if (po->pppoe_dev) {
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+ dev_put(po->pppoe_dev);
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+ po->pppoe_dev = NULL;
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+ }
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pppox_unbind_sock(sk);
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release_sock(sk);
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sock_put(sk);
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