Date: Thu, 22 Jul 2004 08:43:11 GMT From: Matthias Schuendehuette <msch@snafu.de> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/69420: chown(8) not possible on NFS Filesystems from a FreeBSD Server Message-ID: <200407220843.i6M8hBxG003617@www.freebsd.org> Resent-Message-ID: <200407220850.i6M8oRMZ094294@freefall.freebsd.org>
next in thread | raw e-mail | index | archive | help
>Number: 69420
>Category: kern
>Synopsis: chown(8) not possible on NFS Filesystems from a FreeBSD Server
>Confidential: no
>Severity: serious
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Thu Jul 22 08:50:27 GMT 2004
>Closed-Date:
>Last-Modified:
>Originator: Matthias Schuendehuette
>Release: FreeBSD 5.2.1-RELEASE-p9
>Organization:
SIEMENS AG
>Environment:
FreeBSD blnn719x.ww004.siemens.net 5.2.1-RELEASE-p9 FreeBSD 5.2.1-RELEASE-p9 #2: Fri Jul 2 09:50:02 CEST 2004 root@blnn719x.ww004.siemens.net:/usr/obj/usr/src/sys/BLNN719X i386
>Description:
If I try as an ordinary user to chown(8) a file which is owned by that user, the (FreeBSD-) NFS-Server responds with 'not owner' and refuses the change of ownership.
It works as 'root' if root-access is enabled on that filesystem.
chmod(1) and chgrp(1) are working as expected.
I tested on NFS-Servers with FreeBSD 4.10-STABLE, 5.2.1-RELEASE-p9 and 5.2-CURRENT (of Jul 20, 2004) and HP-UX 11.11 - the HP-UX Server behaves as expected and lets a user change the ownership of his files.
I have libpcap-format networktraces of the SETATTR call&reply available for NFSv2 and NFSv3. Especially with NFSv3 one can see the RPC-credentials (UID) and the unchanged UID of the fileowner in question - they are explicitly the same. The returncode of the SETATTR-call is ERR_PERM(1).
Priority is 'high' because this occurs on two production servers :-(
>How-To-Repeat:
Mount a filesystem from a FreeBSD-Server and try (as a non-root user) to change the ownership of your files,
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200407220843.i6M8hBxG003617>