Hi Andrew,
You said: "... If a module is not marked RENT, you get a nice freshly
loaded copy every time. ..."
Is that true if a module is (from a LNKLSTd PDS and the module is)
cached by VLF?
Thanks and regards,
David
On 2021-08-30 19:23, Andrew Rowley wrote:
On 30/08/2021 11:49 pm, Jim Mulder wrote:
The behavior of loading RENT modules from authorized
libraries into subpool 252 (key 0) is to prevent them from
being modified by unauthorized programs. That is intended
to contribute to security.
That is true, but it is a consequence of marking it RENT, not the
purpose. Are RENT modules from authorized libraries more secure than
non-RENT modules?
It actually implies the opposite - RENT modules need additional
protection. When you execute a RENT module, you are executing
something that may have been loaded weeks ago, and without storage
protection may have been deliberately or accidentally modified. If a
module is not marked RENT, you get a nice freshly loaded copy every time.
----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
