Re: Review of ptrace Yama ptrace_scope description

Hi Jann,
...

quoted

So I've made that section of text:

       A  process  that  has the CAP_SYS_PTRACE capability can update the
       /proc/sys/kernel/yama/ptrace_scope file with one of the  following
       values:

       0 ("classic ptrace permissions")
              No  additional  restrictions  on  operations  that  perform
              PTRACE_MODE_ATTACH checks (beyond those imposed by the com‐
              moncap and other LSMs).

              The use of PTRACE_TRACEME is unchanged.

       1 ("restricted ptrace") [default value]
              When    performing    an    operation   that   requires   a
              PTRACE_MODE_ATTACH check, the calling process  must  either
              have the CAP_SYS_PTRACE capability in the user namespace of
              the target process or it  have  a  predefined  relationship
              with  the target process.

Nit: The grammar in this sentence seems wrong to me.
s/or it have/or it must have/?

Yep, thanks for catching that. Fixed now.

Cheers,

Michael


-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/