So closing it with "fix released". (which had a complication for me: I changed status for ubuntu package instead of changing it for qemu line, and now I can't restore it back for ubuntu - since I don't know how/when ubuntu bugs are closed, only upstream)
** Changed in: qemu-kvm (Ubuntu) Status: Confirmed => Fix Released ** Changed in: qemu Status: Confirmed => Fix Released -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/658610 Title: Check whether images have write permissions Status in QEMU: Fix Released Status in “qemu-kvm” package in Ubuntu: Fix Released Bug description: KVM/Qemu should check whether the disk images have write permissions in order to prevent users from getting weird IO errors in their VMs without understanding what's happening. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/658610/+subscriptions