Linux: ptrace 錯誤 EIO

在新的redhat8 出現EIO錯誤。

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

這個錯誤的原是：

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.

原因是什麼？