Date: Mon, 22 Sep 2008 15:17:18 -0700 From: Maxim Sobolev <sobomax@FreeBSD.org> To: Maksim Yevmenkin <maksim.yevmenkin@gmail.com> Cc: Alexey Shuvaev <shuvaev@physik.uni-wuerzburg.de>, freebsd-current@FreeBSD.org Subject: Re: Interface auto-cloning bug or feature? Message-ID: <48D8196E.7020005@FreeBSD.org> In-Reply-To: <bb4a86c70809191551y774c233g5e664c431be62a50@mail.gmail.com> References: <48D2F942.4070801@FreeBSD.org> <20080919084201.GD44330@wep4035.physik.uni-wuerzburg.de> <48D38DFF.8000803@FreeBSD.org> <20080919203310.GA34131@localhost.my.domain> <bb4a86c70809191543y7f3d38ex73c48186dfd163c5@mail.gmail.com> <bb4a86c70809191551y774c233g5e664c431be62a50@mail.gmail.com>
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Patch works for me just fine. Thanks! -Maxim Maksim Yevmenkin wrote: > On Fri, Sep 19, 2008 at 3:43 PM, Maksim Yevmenkin > <maksim.yevmenkin@gmail.com> wrote: >> [....] >> >>>> That what has caused me to look into this issue. You can find patch for >>>> security/vpnc to prevent unbounded interface cloning here: >>>> >>>> http://sobomax.sippysoft.com/~sobomax/vpnc.diff >>>> >>> Ok, the patch prevents interface cloning, but I think it doesn't solve >>> the actual problem. >>> Let's wait for Maksim :) >> ok, how about attached patch. i put it together *very* quickly and >> only gave it a light testing. its for tap(4), because i could compile >> it as a module and tun(4) is compiled into kernel by default, but the >> idea should identical for tun(4). should be even simpler for tun(4) >> because it does not have to deal with 2 kind of devices (i.e. tap and >> vmnet). give it a try, and see if it works. please try both cloning >> paths, i.e. >> >> 1) cat /dev/tap (/dev/vmnet) with and/or without unit number >> >> and >> >> 2) ifconfig tapX (vmnetX) create/destroy >> >> in the mean time i will prepare something similar for tun(4). > > attached is similar patch for tun(4). i only made sure it compiles :) > rebuilding kernel now... > > thanks, > max >
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