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Description of problem: If identifier of virtual device or driver does not start with a letter, qemu should refuse be started. For rhel7, already has such limitation, so file this bug to limit it in rhel6 Version-Release number of selected component (if applicable): # rpm -q qemu-kvm qemu-kvm-0.12.1.2-2.400.el6.x86_64 How reproducible: 100% Steps to Reproduce: 1.Try to boot a guest w/ devices that "id"s do not start with letters. e.g. /usr/libexec/qemu-kvm -cpu SandyBridge -enable-kvm -m 8G -smp 4,sockets=1,cores=4,threads=1 -name rhel6base -drive file=rhel6u4uzcp1.qcow2,if=none,id=-drive-virtio-disk0,format=qcow2,werror=stop,rerror=stop,aio=native -device virtio-blk-pci,drive=-drive-virtio-disk0,id=_virtio-disk0 -boot menu=on -monitor stdio -netdev tap,id=0hostnet0,ifname=guest2,script=/etc/qemu-ifup -device e1000,netdev=0hostnet0,mac=54:52:1b:35:3c:17,id=1net -nodefaults -nodefconfig -vnc :20 -vga std -device virtio-balloon-pci,id,id=1b -chardev socket,id=~a,path=/tmp/monitor,server,nowait -mon chardev=~a,mode=readline 2. 3. Actual results: Guest can boot up Expected results: Qemu should refuse to boot when the value of "id" is not started w/ a letter. Additional info:
Restricting the allowed IDs after the fact in RHEL 6 has only little advantage (basically just that you can't accidentally create a command line that won't work any more in RHEL 7), but could possibly break existing users. Not worth taking the risk at this point in the RHEL 6 lifecycle.