netdev - Re: [PATCH 3/5] net/netfilter/ipvs/ip_vs_ctl.c: drop argument range check just before the check for equality

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Message-ID: <CANZNk83dJCXAWrQ+i5rh=sdUuiiD5ZhzDua-rjJpBZCzzNGDJA@mail.gmail.com>
Date:	Sat, 19 Jul 2014 00:06:28 +0300
From:	Andrey Utkin <andrey.krieger.utkin@...il.com>
To:	Julian Anastasov <ja@....bg>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org, coreteam@...filter.org,
	netfilter-devel@...r.kernel.org, lvs-devel@...r.kernel.org,
	netdev@...r.kernel.org, dcb314@...mail.com,
	David Miller <davem@...emloft.net>, kadlec@...ckhole.kfki.hu,
	Patrick McHardy <kaber@...sh.net>, pablo@...filter.org,
	Simon Horman <horms@...ge.net.au>, wensong@...ux-vs.org
Subject: Re: [PATCH 3/5] net/netfilter/ipvs/ip_vs_ctl.c: drop argument range
 check just before the check for equality

2014-07-18 23:48 GMT+03:00 Julian Anastasov <ja@....bg>:
>         The above check ensures the set_arglen[] value (some
> struct size) does not exceed the arg[MAX_ARG_LEN] space. You can check
> commit 04bcef2a83f40c ("ipvs: Add boundary check on ioctl arguments")
> for more info.

Thanks for info.
What about static check at compilation time?

#if (DAEMON_ARG_LEN > MAX_ARG_LEN) \
 || (SERVICE_ARG_LEN > MAX_ARG_LEN) \
 || (SVCDEST_ARG_LEN > MAX_ARG_LEN)
#error MAX_ARG_LEN exceeded in set_arglen table
#endif

-- 
Andrey Utkin
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