linux-kernel - Re: [PATCH net v5 1/2] net: netfilter: Limit the number of ftp helper port attempts

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Date:   Mon, 20 Sep 2021 09:22:36 +0200
From:   Florian Westphal <fw@...len.de>
To:     Cole Dishington <Cole.Dishington@...iedtelesis.co.nz>
Cc:     pablo@...filter.org, kadlec@...filter.org, fw@...len.de,
        davem@...emloft.net, kuba@...nel.org, shuah@...nel.org,
        linux-kernel@...r.kernel.org, netfilter-devel@...r.kernel.org,
        coreteam@...filter.org, netdev@...r.kernel.org,
        Anthony Lineham <anthony.lineham@...iedtelesis.co.nz>,
        Scott Parlane <scott.parlane@...iedtelesis.co.nz>,
        Blair Steven <blair.steven@...iedtelesis.co.nz>
Subject: Re: [PATCH net v5 1/2] net: netfilter: Limit the number of ftp
 helper port attempts

Cole Dishington <Cole.Dishington@...iedtelesis.co.nz> wrote:
> In preparation of fixing the port selection of ftp helper when using
> NF_NAT_RANGE_PROTO_SPECIFIED, limit the number of ftp helper port
> attempts to 128.
> 
> Looping a large port range takes too long. Instead select a random
> offset within [ntohs(exp->saved_proto.tcp.port), 65535] and try 128
> ports.

LGTM, please fix the format argument error the kbuild robot reported
and resend.  You may add

Acked-by: Florian Westphal <fw@...len.de>

when doing so.