On 18.3.2012 22:29, Martin Matuska wrote: > On 17.3.2012 16:35, Alexander Leidinger wrote: >> On Fri, 16 Mar 2012 21:30:26 +0000 (UTC) Martin Matuska >> <m...@freebsd.org> wrote: >> >>> Author: mm >>> Date: Fri Mar 16 21:30:26 2012 >>> New Revision: 233048 >>> URL: http://svn.freebsd.org/changeset/base/233048 >>> >>> Log: >>> Unhide /dev/zfs in devfsrules_jail. >>> >>> The /dev/zfs device is required for managing jailed ZFS datasets. >> This may give more info to a jail (ZFS is in use on this machine) than >> what someone may want to provide. I have separate rulesets for jails >> without and with ZFS (actually the one without is the default one and >> the one with is a new one): >> ---snip--- >> ... >> >> [devfsrules_unhide_zfs=12] >> add path zfs unhide >> >> ... >> >> [devfsrules_jail_withzfs=16] >> add include $devfsrules_hide_all >> add include $devfsrules_unhide_basic >> add include $devfsrules_unhide_login >> add include $devfsrules_unhide_zfs >> ---snip--- >> >> Anyone with arguments why this may be overly paranoid? If not, I would >> suggest that we go this way instead. >> >> Bye, >> Alexander. >> > The only disclosed information I know of is whether the zfs module is > loaded on your system. > Other alternative I was thinking of would be using a new ruleset (e.g. > devfsrules_jail_zfs=5). > The disadvantage here is that users that already have defined a ruleset > with this number should be informed somehow. > Btw. jail has access to sysctl(8) and this discloses a *LOT* of information, including if ZFS is loaded or not (existence of vfs.zfs) and all its settings and statistics, hardware devices, geom devices, network card counters and many more. Compared to this is /dev/zfs really a minor issue :-) Until we limit the output of sysctl() we don't hide this information just by hiding /dev/zfs.
-- Martin Matuska FreeBSD committer http://blog.vx.sk _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
