Date: Tue, 4 Jul 2000 10:03:05 +0100 From: David Malone <dwmalone@maths.tcd.ie> To: cjclark@alum.mit.edu Cc: Brad Knowles <blk@skynet.be>, Vivek Khera <khera@kciLink.com>, freebsd-stable@FreeBSD.ORG Subject: Re: fstab mount options Message-ID: <20000704100305.A10201@walton.maths.tcd.ie> In-Reply-To: <20000703163045.A248@dialin-client.earthlink.net>; from cristjc@earthlink.net on Mon, Jul 03, 2000 at 04:30:45PM -0700 References: <m266qmc43b.fsf@reader.ptw.com> <14689.1084.894512.504331@onceler.kcilink.com> <v0422082db586be8b6c6b@[195.238.1.121]> <20000703163045.A248@dialin-client.earthlink.net>
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On Mon, Jul 03, 2000 at 04:30:45PM -0700, Crist J. Clark wrote: > The risk I see is does this method let users mount with setuid? Not by the looks of things - you can also only mount on directories owned by yourself. It's enforced in the mount syscall. temp1# sysctl -w vfs.usermount=1 vfs.usermount: 0 -> 1 temp1# suspend Suspended > mount vn0 /mnt mount: Operation not permitted > mkdir blah > mount vn0 blah > mount | fgrep blah vn0 on /usr/home/dwmalone/blah (ufs, local, nodev, nosuid, mounted by dwmalone, writes: sync 2 async 0, reads: sync 14 async 0) > umount blah > fg su temp1# sysctl -w vfs.usermount=0 David. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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