* Gerd v. Egidy (lists@egidy.de) wrote:
Hi Chris,
I traced the issue down to a missing CAP_SYS_RAWIO.The kvm kernel module requires CAP_SYS_RAWIO to use the KVM_ASSIGN_DEV_IRQ ioctl.
There is some pending work in KVM to deal with this. It simply removes CAP_SYS_RAWIO. Need to finish auditing this.
Thanks for confirming the issue.
Dropping all but CAP_SYS_RAWIO in libvirt isn't a good final solution since it drastically undermines the value of dropping privileges.
Wouldn't it make sense to do just that as a temporary solution until the real fix is finished?
Without a fix for this issue, Fedora 13 will, when released, not be able to do pci device passthrough or SR-IOV. This is a regression from F12, where SR-IOV was one of the key features (like device passthrough was in F11).
There's another issue w/ CAP_SYS_ADMIN. At that point we may as well not drop any privileges. So, best is to fix the issues. thanks, -chris