Linux: ptrace 错误 EIO

在新的redhat8 出现EIO错误。

https://man7.org/linux/man-pages/man2/ptrace.2.html

这个错误的原是：

EIO request is invalid, or an attempt was made to read from or write to an invalid area in the tracer’s or the tracee’s memory, or there was a word-alignment violation, or an invalid signal was specified during a restart request.

原因是什么？