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On rhel7.2 release version also hit this issue. Pkg version: qemu-kvm-1.5.3-105.el7.x86_64 qemu-img-1.5.3-105.el7.x86_64 kernel-3.10.0-327.el7.x86_64 steps and results are the same as bug description.
As already stated in the original RHEL 6 bug, this is harmless. Getting rid of the leaks in the long run would be nice, but this is probably not a change to make for the stable qemu-kvm version of RHEL.