netdev - Re: [PATCH V2 resend] ipv6: fix incorrect route 'expires' value passed to userspace

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 20 Jul 2012 11:22:41 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	David.Laight@...LAB.COM
Cc:	lw@...fujitsu.com, netdev@...r.kernel.org, shemminger@...tta.com
Subject: Re: [PATCH V2 resend] ipv6: fix incorrect route 'expires' value
 passed to userspace

From: "David Laight" <David.Laight@...LAB.COM>
Date: Fri, 20 Jul 2012 11:32:05 +0100

>> -	else if (rt->dst.expires - jiffies < INT_MAX)
>> -		expires = rt->dst.expires - jiffies;
>> +	else if ((long)rt->dst.expires - (long)jiffies > INT_MIN
>> +			&& (long)rt->dst.expires - (long)jiffies <
> INT_MAX)
>> +		expires = (long)rt->dst.expires - (long)jiffies;
>>  	else
>> -		expires = INT_MAX;
>> +		expires = time_is_after_jiffies(rt->dst.expires) ?
> INT_MAX : INT_MIN;
> 
> I can't help feeling there is a better way to do this.
> Maybe:
> 	long expires = rt->dst.expires - jiffies;
> 	if (expires != (int)expires)
> 		expires = expires > 0 ? INT_MAX : INT_MIN;
> Although maybe -INT_MAX instead of INT_MIN.

This patch also does not apply at all to net-next, so needs to be
redone regardless.

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html