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SubjectRe: ioperm is preserved across fork and execve, but iopl is not
> As recently as October 2012, 32-bit Linux kernels preserved both iopl
> and ioperm across fork and execve, but the behavior of iopl changed
> with this commit:

Missed this thread initially. That perhaps does argue for it being safer
to put back.

> And the man page for iopl continues to state "permissions are
> inherited by fork and execve":
> A test program demonstrating the problem is attached

Is there a real world use case ?


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