aio-epoll: Fix use-after-free of node aio_epoll_update needs the fields in node, so delay the free. Reported-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Fam Zheng <famz@redhat.com> Message-id: 1447655534-13974-1-git-send-email-famz@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>