Probes fixes for v6.9-rc3:

- kprobes: Fix possible use-after-free issue on kprobe registration. Since
  check_kprobe_address_safe() uses `is_module_text_address()` and
  `__module_text_address()` separately, if the probe address is on an
  unloading module, the first `is_module_text_address()` return true but
  the second `__module_text_address()` returns NULL (module is unloaded
  between them). Thus it expects the probe is on the kernel text, and
  skips to get the module reference. In this case, when it arms a breakpoint
  on the probe address, it may cause a use-after-free problem.
  To fix this issue, we only use `__module_text_address()` once and tries
  to get reference of the module, if it fails, reject the probe.
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