Re: [libvirt] [PATCH] qemu: check for vm after starting a job

https://bugzilla.redhat.com/show_bug.cgi?id=638285 - when migrating a guest, it was very easy to provoke a race where an application could query block information on a VM that had just been migrated away. Any time qemu code obtains a job lock, it must also check that the VM was not taken down in the time where it was waiting for the lock. * src/qemu/qemu_driver.c (qemudDomainSetMemory) (qemudDomainGetInfo, qemuDomainGetBlockInfo): Check that vm still exists after obtaining job lock, before starting monitor action.

if (err < 0) { + endjob: if (qemuDomainObjEndJob(vm) == 0)

+ endjob: if (qemuDomainObjEndJob(vm) == 0)