netdev - Re: [patch 1/1] [PATCH BUG_FIX] ipv6: fix refcnt problem related to POSTDAD state

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Message-ID: <20101025230132.GA5474@gondor.apana.org.au>
Date:	Mon, 25 Oct 2010 16:01:32 -0700
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Ursula Braun <ursula.braun@...ibm.com>
Cc:	netdev@...r.kernel.org, linux-s390@...r.kernel.org,
	vosburgh@...ibm.com, "David S. Miller" <davem@...emloft.net>
Subject: Re: [patch 1/1] [PATCH BUG_FIX] ipv6: fix refcnt problem related
	to POSTDAD state

On Mon, Oct 25, 2010 at 11:06:43AM +0200, Ursula Braun wrote:
> Subject: [patch 1/1] [PATCH BUG_FIX] ipv6: fix refcnt problem related to POSTDAD state
> 
> From: Ursula Braun <ursula.braun@...ibm.com>
> 
> After running this bonding setup script
>     modprobe bonding miimon=100 mode=0 max_bonds=1
>     ifconfig bond0 10.1.1.1/16
>     ifenslave bond0 eth1
>     ifenslave bond0 eth3
> on s390 with qeth-driven slaves, modprobe -r fails with this message
>     unregister_netdevice: waiting for bond0 to become free. Usage count = 1
> due to twice detection of duplicate address.
> Problem is caused by a missing decrease of ifp->refcnt in addrconf_dad_failure.
> An extra call of in6_ifa_put(ifp) solves it.
> Problem has been introduced with commit f2344a131bccdbfc5338e17fa71a807dee7944fa.
> 
> Signed-off-by: Ursula Braun <ursula.braun@...ibm.com>
> Cc: David S. Miller <davem@...emloft.net>

Acked-by: Herbert Xu <herbert@...dor.apana.org.au>

Thanks for catching this!
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
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