Re: udevadm etc
Russell Coker <[email protected]>
| Newsgroups | org.kernel.vger.selinux-refpolicy |
|---|---|
| Message-ID | <5107170.hMIqiVgsFT@liv> |
On Thursday, 10 December 2020 9:00:38 AM AEDT Chris PeBenito wrote: > On 12/9/20 7:38 AM, Russell Coker wrote: > > In systemd verision 247.1 (which is in Debian/Unstable now) systemd-udevd > > is a symlink to udevadm. In systemd version 241 (in Debian/Buster) it's > > not a symlink. The systemd changelog doesn't mention this change so I > > don't know exactly when it happened. > > > > type_transition init_t udevadm_exec_t:process udevadm_t; > > type_transition initrc_t udevadm_exec_t:process udevadm_t; > > type_transition sysadm_t udevadm_exec_t:process udevadm_t; > > type_transition consolekit_t udev_exec_t:process udev_t; > > type_transition devicekit_disk_t udev_exec_t:process udev_t; > > type_transition hald_t udev_exec_t:process udev_t; > > type_transition hotplug_t udev_exec_t:process udev_t; > > type_transition init_t udev_exec_t:process udev_t; > > type_transition initrc_t udev_exec_t:process udev_t; > > type_transition kernel_t udev_exec_t:process udev_t; > > type_transition virtd_t udev_exec_t:process udev_t; > > > > Above is a list of the relevant type_transition rules from refpolicy taken > > from git 3 days ago (there don't appear to be any udev changes since > > then). > > > > I think that the only thing to do is to have init_t and initrc_t run > > udevadm in the udev_t domain. > > > > Is it worth having a udevadm_t domain just for running it from sysadm_t or > > should we have that run as udev_t too? > > The udevadm_t domain is much smaller than udev_t, and critically doesn't > have all the device access udev_t has. Systemd merging the binaries into > one doesn't necessarily mean the policy has to merge too. Currently only 3 domains can transition to udevadm_t. 2 of those 3 also transition to udev_t so they can't use udevadm_t without code changes. The only remaining domain is sysadm_t. The question is not "do we have to merge the policy because systemd merges binaries" but "should we have a separate domain only used for sysadm_t"? -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/