netdev - Re: [PATCH net-next] net: ndisc.c: reduce size of __ndisc_fill_addr

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Date:   Mon, 29 May 2017 21:42:16 -0600
From:   David Ahern <dsahern@...il.com>
To:     Joe Perches <joe@...ches.com>, David Miller <davem@...emloft.net>,
        cugyly@....com
Cc:     netdev@...r.kernel.org, Linyu.Yuan@...atel-sbell.com.cn
Subject: Re: [PATCH net-next] net: ndisc.c: reduce size of
 __ndisc_fill_addr_option()

On 5/29/17 9:41 PM, Joe Perches wrote:
> On Mon, 2017-05-29 at 23:30 -0400, David Miller wrote:
>> From: yuan linyu <cugyly@....com>
>> Date: Sat, 27 May 2017 06:00:52 +0800
>>
>>> From: yuan linyu <Linyu.Yuan@...atel-sbell.com.cn>
>>>
>>> Signed-off-by: yuan linyu <Linyu.Yuan@...atel-sbell.com.cn>
>> Applied, thanks.
> OK, but is it really safe though?
> 
> Could "space" (an int) ever be negative after
> subtracting "pad" and "data_len"?
> 

that function should be converted to skb_put_zero once it hits net-next.