netdev - Re: [PATCH] ipv6: fix incorrect route 'expires' value passed to userspace.

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Date:	Mon, 16 Jul 2012 22:26:21 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	shemminger@...tta.com
Cc:	lw@...fujitsu.com, netdev@...r.kernel.org
Subject: Re: [PATCH] ipv6: fix incorrect route 'expires' value passed to
 userspace.

From: Stephen Hemminger <shemminger@...tta.com>
Date: Mon, 16 Jul 2012 09:41:24 -0700

> On Mon, 16 Jul 2012 16:09:37 +0800
> Li Wei <lw@...fujitsu.com> wrote:
> 
>> diff --git a/net/ipv6/route.c b/net/ipv6/route.c
>> index becb048..a7fec9d 100644
>> --- a/net/ipv6/route.c
>> +++ b/net/ipv6/route.c
>> @@ -2516,7 +2516,7 @@ static int rt6_fill_node(struct net *net,
>>  		goto nla_put_failure;
>>  	if (!(rt->rt6i_flags & RTF_EXPIRES))
>>  		expires = 0;
>> -	else if (rt->dst.expires - jiffies < INT_MAX)
>> +	else if ((int)(rt->dst.expires - jiffies) < INT_MAX)
>>  		expires = rt->dst.expires - jiffies;
>>  	else
>>  		expires = INT_MAX;
> 
> Why not use time_is_after_jiffies() macro?

This test has a wider window of acceptance.
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