linux-kernel - Re: [PATCH] bonding: Fix sysfs attribute handling

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Message-ID: <18749.1206234754@death>
Date:	Sat, 22 Mar 2008 18:12:34 -0700
From:	Jay Vosburgh <fubar@...ibm.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
cc:	Libor Pechacek <lpechacek@...e.cz>,
	bonding-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, stable@...nel.org
Subject: Re: [PATCH] bonding: Fix sysfs attribute handling 

Andrew Morton <akpm@...ux-foundation.org> wrote:

>On Fri, 21 Mar 2008 14:52:55 +0100 Libor Pechacek <lpechacek@...e.cz> wrote:
>
>> bonding: Fix sysfs attribute handling
>> 
>> For bonding interfaces any attempt to read the sysfs directory contents after
>> module removal results in an oops.  The fix is to release sysfs attributes
>> for the interfaces upon module unload.
>> 
>> Signed-off-by: Libor Pechacek <lpechacek@...e.cz>
>> --
>>  drivers/net/bonding/bond_main.c |    3 +--
>>  1 files changed, 1 insertions(+), 2 deletions(-)
>> 
>> diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
>> index 0942d82..33767d4 100644
>> --- a/drivers/net/bonding/bond_main.c
>> +++ b/drivers/net/bonding/bond_main.c
>> @@ -4528,8 +4528,7 @@ static void bond_free_all(void)
>>  		netif_tx_unlock_bh(bond_dev);
>>  		/* Release the bonded slaves */
>>  		bond_release_all(bond_dev);
>> -		bond_deinit(bond_dev);
>> -		unregister_netdevice(bond_dev);
>> +		bond_destroy(bond);
>>  	}
>
>Is this also needed in 2.6.24.x?

	Yes (I haven't tested it personally, but the affected code is
the same).  I was going to forward this to stable when it was accepted
upstream.  The oops is fairly straightforward to create:

# modprobe bonding
# cd /sys/class/net/bond0/bonding
# rmmod bonding
# ls

	-J

---
	-Jay Vosburgh, IBM Linux Technology Center, fubar@...ibm.com
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