Messages in this thread | | | Date | Wed, 15 Sep 2004 23:03:48 +0200 | From | Kay Sievers <> | Subject | Re: [patch] kernel sysfs events layer |
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On Wed, Sep 15, 2004 at 01:56:43PM -0700, Tim Hockin wrote: > On Wed, Sep 15, 2004 at 04:49:18PM -0400, Robert Love wrote: > > On Wed, 2004-09-15 at 13:47 -0700, Tim Hockin wrote: > > > > > Are you not sending it with some specific device as the source? Or is it > > > just coming from some abstract root kobject? > > > > It comes the the physical device. > > > > Is there really a specific issue that you are seeing? > > Well, two. > > 1) If you send me an event "/dev/hda3 mounted", but it was for some other > namespace, you just leaked potentially useful information.
You can listen only as root! All information is already in /proc/mounts.
> I'm no security expert, but that seems to me to be a gratuitous leak.
I don't aggree on the second part :)
> Maybe it's just another example of why namespaces need to go away. > > 2) If you send me an event "/dev/hda3 mounted" do I also get an event when > I loopback mount /tmp/rh9.0-1.iso or when I bind mount /foo to /bar or > when I mount server:/export/home on /home?
You get an event if fs-code claims/relases a genhd. It's a claim/release event to be more precise. Only the first mount will emit a event and the last umount.
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