netdev - Re: [PATCH 2/2] net: dsa: remove phy

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 15 Feb 2016 09:52:50 +0100
From:	Neil Armstrong <narmstrong@...libre.com>
To:	Vivien Didelot <vivien.didelot@...oirfairelinux.com>,
	Sascha Hauer <s.hauer@...gutronix.de>, netdev@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Andrew Lunn <andrew@...n.ch>,
	Guenter Roeck <linux@...ck-us.net>
Subject: Re: [PATCH 2/2] net: dsa: remove phy_disconnect from error path

On 02/11/2016 04:39 PM, Vivien Didelot wrote:
> Hi Sascha,
> 
> Sascha Hauer <s.hauer@...gutronix.de> writes:
> 
>> The phy has not been initialized, disconnecting it in the error
>> path results in a NULL pointer exception. Drop the phy_disconnect
>> from the error path.
>>
>> Signed-off-by: Sascha Hauer <s.hauer@...gutronix.de>
>> ---
>>  net/dsa/slave.c | 1 -
>>  1 file changed, 1 deletion(-)
>>
>> diff --git a/net/dsa/slave.c b/net/dsa/slave.c
>> index 40b9ca7..91e3b2f 100644
>> --- a/net/dsa/slave.c
>> +++ b/net/dsa/slave.c
>> @@ -1194,7 +1194,6 @@ int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
>>  	if (ret) {
>>  		netdev_err(master, "error %d registering interface %s\n",
>>  			   ret, slave_dev->name);
>> -		phy_disconnect(p->phy);
>>  		ds->ports[port] = NULL;
>>  		free_netdev(slave_dev);
>>  		return ret;
> 
> I'm adding Neil in the loop, since he did some work similar to this, if
> I'm not mistaken.
> 
> Thanks,
> -v
> 

He's right, the phy is not yet created in this error path.

Acked-by: Neil Armstrong <narmstrong@...libre.com>

Thanks Vivien,
Neil