Messages in this thread | | | Date | Tue, 16 Jul 2013 19:50:03 +0000 | From | "Serge E. Hallyn" <> | Subject | Re: [PATCH RFC] allow some kernel filesystems to be mounted in a user namespace |
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Quoting Al Viro (viro@ZenIV.linux.org.uk): > On Tue, Jul 16, 2013 at 02:29:20PM -0500, Serge Hallyn wrote: > > All the files will be owned by host root, so there's no security > > concern in allowing this. > > Files owned by root != very bad things can't be done by non-root. > Especially for debugfs, which is very much a "don't even think about > mounting that on a production box" thing...
I would prefer it not be mounted. But near as I can tell there should be no regression security-wise whether an unprivileged user on the host has access to it, or whether a user in a non-init user ns is allowed to mount it. (Obviously I could very well be wrong)
-serge
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