netdev - Re: [PATCH] ipv6: parameter p.name is empty

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Date:   Thu, 3 Jun 2021 11:09:13 -0600
From:   David Ahern <dsahern@...il.com>
To:     nicolas.dichtel@...nd.com, zhang kai <zhangkaiheb@....com>,
        davem@...emloft.net, yoshfuji@...ux-ipv6.org, dsahern@...nel.org,
        kuba@...nel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ipv6: parameter p.name is empty

On 6/3/21 10:29 AM, Nicolas Dichtel wrote:
> Le 03/06/2021 à 17:15, David Ahern a écrit :
>> On 6/3/21 7:33 AM, Nicolas Dichtel wrote:
>>> Le 03/06/2021 à 11:50, zhang kai a écrit :
>>>> so do not check it.
>>>>
>>>> Signed-off-by: zhang kai <zhangkaiheb@....com>
>>>> ---
>>>>  net/ipv6/addrconf.c | 3 ---
>>>>  1 file changed, 3 deletions(-)
>>>>
>>>> diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
>>>> index b0ef65eb9..4c6b3fc7e 100644
>>>> --- a/net/ipv6/addrconf.c
>>>> +++ b/net/ipv6/addrconf.c
>>>> @@ -2833,9 +2833,6 @@ static int addrconf_set_sit_dstaddr(struct net *net, struct net_device *dev,
>>>>  	if (err)
>>>>  		return err;
>>>>  
>>>> -	dev = __dev_get_by_name(net, p.name);
>>>> -	if (!dev)
>>>> -		return -ENOBUFS;
>>>>  	return dev_open(dev, NULL);
>>>>  }
>>>>  
>>>>
>>> This bug seems to exist since the beginning of the SIT driver (24 years!):
>>> https://git.kernel.org/pub/scm/linux/kernel/git/davem/netdev-vger-cvs.git/commit/?id=e5afd356a411a
>>> Search addrconf_set_dstaddr()
>>>
>>> Acked-by: Nicolas Dichtel <nicolas.dichtel@...nd.com>
>>>
>>
>> A patch was sent yesterday, "sit: set name of device back to struct
>> parms", to set the name field in params.
>>
> Oh yes, it was in my spam folder ...
> 

Really a question for zhang kai about the patches - why both of these.

And from there how did this ever work? addrconf_set_sit_dstaddr should
have been failing for the last 24 years so why fix it vs just ripping it
out.