SELinux is preventing qemu-kvm (qemu_t) "execute" to /dev/zero (zero_device_t). (full alert below)
I thought that maybe the latest selinux-policy update would fix this, but after updating and 'sudo /sbin/restorecon -v /dev/zero' again, I still have the same SELinux denial.
I browsed the CentOS bug tracker extensively (with search and browsing the categories kvm, selinux-policy and selinux-policy-targeted) but did not find a similar issue.
Should I book an issue in the bug tracker at this stage? (I'm pretty surprised though that nobody encountered this, since it is systematic, but my system is pretty much a vanilla CentOS 5.4 x86_64 with regard to SELinux and QEMU/KVM...)