On Mon, 2012-02-20 at 20:18 +0100, Lennart Poettering wrote: > On Mon, 20.02.12 20:06, Roberto Sassu (roberto.sassu@xxxxxxxxx) wrote: > > > >We moved SELinux loading out of the initrd into systemd, in order to > > >support fully featured initrd-less boots. I don't think we should reopen > > >this problem set by having IMA in the initrd. I believe IMA should be > > >treated pretty much exactly like SELinux here: the policy should be > > >loaded from PID1 and it needs to be a compile time option, and it needs > > >a kernel cmdline option to disable it (i.e. like selinux=0). > > > > > > > If the SELinux module in dracut is to be considered definitively broken > > probably also the IMA module should be removed, because it will not be > > possible to load policies with LSM rules. But i don't know how this > > feature can be supported by distributions without Systemd installed. > > Well, if the rumours I keep hearing are true Ubuntu might join the > systemd camp too after their LTS release. Maybe the supporting > non-systemd systems issues solves itself by that for you? > > > Regarding the kernel option, actually there is no a specific parameter > > to disable IMA. However, it can be introduced in the patches proposed > > by Mimi Zohar about the 'ima-appraisal' feature. This can allow to > > disable IMA or to put it in permissive/enforce mode as it happens for > > example in SELinux. > > Whether there is a kernel option to enable/disable IMA will not stop > these patches from getting into systemd. But I am quite sure they will > stop IMA from getting any wider coverage in the mainstream distributions > (if you care for that). Really? The original IMA patch set defined CONFIG_IMA_BOOTPARAM and CONFIG_IMA_BOOTPARAM_VALUE, but based on the lkml discussion, I removed support for them. (May 2008) In lieu of a switch to enable/disable IMA, the default measurement policy is null, so that nothing is measured, unless 'ima_tcb' is provided on the boot command line. > Oh, and one more thing: it matters to me that this doesn't break my > build. So it needs to allow me booting when enabled in configure, but > without any IMA policy around. > > Lennart Of course IMA should work with/without updating the measurement policy. thanks, Mimi -- To unsubscribe from this list: send the line "unsubscribe initramfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
