[Bug 210655] ptrace.2: documentation is incorrect about access checking threads in same thread group

[Alejandro Colomar (man-pages)]

Hi,

There's a bug report: https://bugzilla.kernel.org/show_bug.cgi?id=210655

[[
Under "Ptrace access mode checking", the documentation states:
  "1. If the calling thread and the target thread are in the same thread
group, access is always allowed."

This is incorrect. A thread may never attach to another in the same group.

Reference, ptrace_attach()
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/kernel/ptrace.c?h=v5.9.14#n380
]]

I just wanted to make sure that it is a bug in the manual page, and not
in the implementation.


Thanks,

Alex

-- 
Alejandro Colomar
Linux man-pages comaintainer; https://www.kernel.org/doc/man-pages/
http://www.alejandro-colomar.es