KVM: x86: cleanup the page tracking SRCU instance
SRCU uses a delayed work item. Skip cleaning it up, and the result is use-after-free in the work item callbacks. Reported-by: NDmitry Vyukov <dvyukov@google.com> Suggested-by: NDmitry Vyukov <dvyukov@google.com> Cc: stable@vger.kernel.org Fixes: 0eb05bf2Reviewed-by: NXiao Guangrong <xiaoguangrong.eric@gmail.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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