netdev - Re: [PATCH net 1/3] bonding: Fix race condition between bond_enslave() and bond_3ad_update_lacp

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Message-Id: <20130219.005229.193592350299221718.davem@davemloft.net>
Date:	Tue, 19 Feb 2013 00:52:29 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	fubar@...ibm.com
Cc:	nikolay@...hat.com, netdev@...r.kernel.org, andy@...yhouse.net
Subject: Re: [PATCH net 1/3] bonding: Fix race condition between
 bond_enslave() and bond_3ad_update_lacp_rate()

From: Jay Vosburgh <fubar@...ibm.com>
Date: Mon, 18 Feb 2013 13:09:13 -0800

> Nikolay Aleksandrov <nikolay@...hat.com> wrote:
> 
>>port->slave can be NULL since it's being initialized in bond_enslave
>>thus dereferencing a NULL pointer in bond_3ad_update_lacp_rate()
>>Also fix a minor bug, which could cause a port not to have
>>AD_STATE_LACP_TIMEOUT since there's no sync between
>>bond_3ad_update_lacp_rate() and bond_3ad_bind_slave(), by changing
>>the read_lock to a write_lock_bh in bond_3ad_update_lacp_rate().
> 
> Signed-off-by: Jay Vosburgh <fubar@...ibm.com>
> 
>>Signed-off-by: Nikolay Aleksandrov <nikolay@...hat.com>

Applied
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