linux-kernel - Re: [PATCH] net: inet: diag: Fix an error handling

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Message-ID: <3861cfae-c325-c6c1-803a-3996ee3e8242@wanadoo.fr>
Date:   Mon, 12 Sep 2016 20:20:53 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     David Ahern <dsa@...ulusnetworks.com>, davem@...emloft.net,
        kuznet@....inr.ac.ru, jmorris@...ei.org, yoshfuji@...ux-ipv6.org,
        kaber@...sh.net
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] net: inet: diag: Fix an error handling

Le 12/09/2016 à 16:35, David Ahern a écrit :
> On 9/12/16 12:02 AM, Christophe JAILLET wrote:
>> diff --git a/net/ipv4/inet_diag.c b/net/ipv4/inet_diag.c
>> index abfbe492ebfe..795af25cf84c 100644
>> --- a/net/ipv4/inet_diag.c
>> +++ b/net/ipv4/inet_diag.c
>> @@ -1134,7 +1134,6 @@ int inet_diag_handler_get_info(struct sk_buff *skb, struct sock *sk)
>>   
>>   	handler = inet_diag_lock_handler(sk->sk_protocol);
>>   	if (IS_ERR(handler)) {
>> -		inet_diag_unlock_handler(handler);
>>   		nlmsg_cancel(skb, nlh);
>>   		return PTR_ERR(handler);
>>   	}
>>
> That call is needed. inet_diag_unlock_handler does not operate on the input arg but a global mutex. Perhaps a better patch is to change inet_diag_unlock_handler() to a void.
This is obvious. Sorry for the noise.

CJ