Re: [PATCH 11/20] ethernet: ucc_geth: fix use-after-free in ucc_geth_remove()

[Rasmus Villemoes]

On 05/12/2020 21.48, Jakub Kicinski wrote:
> On Sat,  5 Dec 2020 20:17:34 +0100 Rasmus Villemoes wrote:
>> -	unregister_netdev(dev);
>> -	free_netdev(dev);
>>  	ucc_geth_memclean(ugeth);
>>  	if (of_phy_is_fixed_link(np))
>>  		of_phy_deregister_fixed_link(np);
>>  	of_node_put(ugeth->ug_info->tbi_node);
>>  	of_node_put(ugeth->ug_info->phy_node);
>> +	unregister_netdev(dev);
>> +	free_netdev(dev);
> 
> Are you sure you want to move the unregister_netdev() as well as the
> free?
> 

Hm, dunno, I don't think it's needed per se, but it also shouldn't hurt
from what I can tell. It seems more natural that they go together, but
if you prefer a minimal patch that's of course also possible.

I only noticed because I needed to add a free of the ug_info in a later
patch.

Rasmus