linux-kernel - Re: [NETFILTER] early

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]

Message-ID: <4682582D.7080501@sw.ru>
Date:	Wed, 27 Jun 2007 16:29:33 +0400
From:	Vasily Averin <vvs@...ru>
To:	Patrick McHardy <kaber@...sh.net>
CC:	netfilter-devel@...ts.netfilter.org, rusty@...tcorp.com.au,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Eric Dumazet <dada1@...mosbay.com>,
	Jan Engelhardt <jengelh@...putergmbh.de>,
	"David S. Miller" <davem@...emloft.net>, devel@...nvz.org
Subject: Re: [NETFILTER] early_drop() imrovement (v4)

Patrick McHardy wrote:
> +	for (i = 0; i < NF_CT_EVICTION_RANGE; i++) {
> +		hlist_for_each_entry(h, n, &nf_conntrack_hash[hash], hnode) {
> +			tmp = nf_ct_tuplehash_to_ctrack(h);
> +			if (!test_bit(IPS_ASSURED_BIT, &tmp->status))
> +				ct = tmp;
> +		}
> +		if (ct) {
> +			atomic_inc(&ct->ct_general.use);
> +			break;
> +		}
> +		hash = (hash + 1) % nf_conntrack_htable_size;

it is incorrect,
We should count the number of checked _conntracks_, but you count the number of
hash buckets. I.e "i" should be incremented/checked inside the nested loop.

Thank you,
	Vasily Averin
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/