netdev - Re: [PATCH net-next] sctp: add a checking for sctp_sysctl_net

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Date:	Thu, 8 May 2014 19:26:27 +0800
From:	Wang Weidong <wangweidong1@...wei.com>
To:	Neil Horman <nhorman@...driver.com>
CC:	David Miller <davem@...emloft.net>,
	Vlad Yasevich <vyasevich@...il.com>,
	Daniel Borkmann <dborkman@...hat.com>,
	<linux-sctp@...r.kernel.org>, <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next] sctp: add a checking for sctp_sysctl_net_register

On 2014/5/8 19:11, Neil Horman wrote:
> On Thu, May 08, 2014 at 03:55:05PM +0800, Wang Weidong wrote:
>> When register_net_sysctl failed, we should free the
>> sysctl_table while the net_namespace is not init_net.
>>
>> Signed-off-by: Wang Weidong <wangweidong1@...wei.com>
>> ---
>>  net/sctp/sysctl.c | 5 +++++
>>  1 file changed, 5 insertions(+)
>>
>> diff --git a/net/sctp/sysctl.c b/net/sctp/sysctl.c
>> index 844d2b0..4c17694 100644
>> --- a/net/sctp/sysctl.c
>> +++ b/net/sctp/sysctl.c
>> @@ -450,6 +450,11 @@ int sctp_sysctl_net_register(struct net *net)
>>  	}
>>  
>>  	net->sctp.sysctl_header = register_net_sysctl(net, "net/sctp", table);
>> +	if (net->sctp.sysctl_header == NULL) {
>> +		if (!net_eq(net, &init_net))
>> +			kfree(table);
>> +		return -ENOMEM;
>> +	}
> Sorry, we're not special casing this in 3 places.  Why not just revert the
> origonal commit so that all the sysctl tables can be handled the same way
> Neil
> 
Hi Neil,

The original commit avoids to kmemdup 

>>  	return 0;
>>  }
>>  
>> -- 
>> 1.7.12
>>
>>
>>
> --
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> 


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