Date: Mon, 28 Aug 2000 13:35:32 -0400 (EDT) From: Robert Watson <rwatson@FreeBSD.ORG> To: Poul-Henning Kamp <phk@critter.freebsd.dk> Cc: freebsd-fs@FreeBSD.ORG Subject: Re: procfs_lookup() and jail interaction Message-ID: <Pine.NEB.3.96L.1000828133358.84062N-100000@fledge.watson.org> In-Reply-To: <11832.967483188@critter>
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On Mon, 28 Aug 2000, Poul-Henning Kamp wrote: > >So the check is still happening above the VFS layer. > > > >I'll look at the code further this evening. > > Hmm, but vn_open needs to find the vnode first, and that means > a VOP_LOOKUP into procfs doesn't it ? How else (when the vfscache > isn't used) would it know which vnode ? Sure enough, procfs_lookup() was missing a call to {PRISON_CHECK(), p_cansee()}, so adding one now gives the right results: alsvid:~> touch /proc/1 touch: /proc/1: Read-only file system I'll update p_stuff, and keep looking for other problems. Thanks, Robert N M Watson robert@fledge.watson.org http://www.watson.org/~robert/ PGP key fingerprint: AF B5 5F FF A6 4A 79 37 ED 5F 55 E9 58 04 6A B1 TIS Labs at Network Associates, Safeport Network Services To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message
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