Messages in this thread | | | Date | Wed, 15 Nov 2006 12:54:46 -0500 | From | Karl MacMillan <> | Subject | Re: [PATCH 12/19] CacheFiles: Permit a process's create SID to be overridden |
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James Morris wrote: > On Wed, 15 Nov 2006, David Howells wrote: > >> James Morris <jmorris@namei.org> wrote: >> >>> The ability to set this needs to be mediated via MAC policy. >> Something like this, you mean? > > Yes, although perhaps writing to tsec->kern_create_sid or similar, which > then overrides tsec->create_sid if set. Also need > /proc/pid/attr/kern_fscreate as a read only node. > > >> + error = task_has_perm(current, current, PROCESS__SETFSCREATE); > > I wonder if we also need 'relabelto' and 'relabelfrom' permissions, to > control which labels are being used. >
No - assuming the existing checks are called, the controls on file/dir/etc creation should be sufficient to control which labels are used. Setting fscreate is not a relabel operation nor does it result in a relabel operation as the sid is only used for creation.
Karl
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