Description of problem:

While running one of the qemu-kvm unit test (called access), the qemu process
gets to a state that it cannot be killed. When killed, the process get's zombied
but continue to consume resources.

Version-Release number of selected component (if applicable):
kvm-83-143.el5

How reproducible:
Consistently, every time.

Steps to Reproduce:
1. qemu-kvm -kernel access.flat (the attached test-case)

   This test-case was/can be built from qemu-kvm unit tests.
   clone an upstream qemu-kvm git repo, go to its subdir kvm/user and type make
   test-cases are created in test/x86 subdir, including access.flat
   Intended test runs with following parameters to produce output:
    "-kernel access.flat -device testdev,chardev=testlog -chardev file,id=testlog,path=access.log", where access.log is an example of an output file
2. wait about 5 minutes

   Actually, the test-case runs lots of sub-test-cases until it reaches the problematic sub-test-case that causes this problem. You can follow the output to see when it's stuck.

3. try to kill qemu-kvm process
  
Actual results:
qemu-kvm process keeps running

Expected results:
qemu-kvm process killed and disappear

Additional info: