Date: Thu, 7 Apr 2005 13:36:26 -0700 From: Kris Kennaway <kris@obsecurity.org> To: Brooks Davis <brooks@one-eyed-alien.net> Cc: stable@freebsd.org Subject: Re: nfsiod tasks started in error Message-ID: <20050407203626.GB33137@xor.obsecurity.org> In-Reply-To: <20050407202947.GB21190@odin.ac.hmc.edu> References: <MIEPLLIBMLEEABPDBIEGKELKHDAA.bob@a1poweruser.com> <20050407202947.GB21190@odin.ac.hmc.edu>
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--GID0FwUMdk1T2AWN Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Apr 07, 2005 at 01:29:48PM -0700, Brooks Davis wrote: > On Thu, Apr 07, 2005 at 04:11:55PM -0400, bob@a1poweruser.com wrote: > > During sysinstall answered no to the server and client nfs questions > > and after installed completed and system rebooted I see task > > nfsiod1,2,3,4 running in output of ps ax command. This was not the > > case in any of the 4.x releases. This can be looked upon as a > > security leak. This may be a error in the new boot up process. This > > was first reported 1/16/2004 in 5.2 RC2 as Problem Report kern/61438 > > and again in 5.3 as Problem Report kern/79539 > >=20 > > I tried to run /usr/local/etc/rc.d/killnfs.sh script to kill these > > unwanted tasks but that does not work. > >=20 > > Any suggestions on how I can kill these bogus nfs tasks as part of > > boot up or what to change in the boot up process so these tasks > > don't get started in the first place? Doing a manual recompile of > > the kernel to remove the nfs statements is not a viable solution. >=20 > nfsiod now runs as a kernel process and is control by these sysctls: >=20 > vfs.nfs.iodmaxidle: 120 > vfs.nfs.iodmin: 4 > vfs.nfs.iodmax: 20 >=20 > It looks like setting vfs.nfs.iodmin=3D0 and then klling them off works. > We probably should think about changing the default to 0 and setting > appropriate values via /etc/rc.d/nfs. Over all, I can't say this is a > very high priority though patches would certaintly be accepted. This was a deliberate change by Peter, since if you have NFSCLIENT in the kernel it's assumed you want to use the machine as a NFS client. Kris --GID0FwUMdk1T2AWN Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (FreeBSD) iD8DBQFCVZnKWry0BWjoQKURAkoPAJ9Z3AUxg9Di+GVsWbloagDHZBM6MwCfahQt XXlsiiBz0p3PyOaizTgKkmY= =D3Y0 -----END PGP SIGNATURE----- --GID0FwUMdk1T2AWN--
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