kern/64573: mmap with PROT_NONE, but still could be read

[David G. Lawrence]

>  First, there is a much simpler program to reproduce the bug.  This is
>  from 5.2-current as of April 6, 2004.
>  
>  /*
>   * Test mmap() and PROT_NONE.  The first printf() should fail with seg
>   * fault or bus error because the segment has protection PROT_NONE,
>   * but actually, it runs ok.
>   */

   Why would anyone want to mmap a file with PROT_NONE?

-DG

David G. Lawrence
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