Ed J wrote on 13/06/2008 04:14:24 AM:

> We just opened APAR OA25468 against z/OS UNIX. If you run with REFRPROT 
> in PROGxx, you can be hit by this.
> 
> IIUC, z/OS UNIX fork processing uses the OC instruction, while in PSW 
> key zero, to WRITE on EVERY PAGE of EVERY MODULE in the private area of 
> the address space! (Who designed this???!)
> 
> That's the scary part.

Be careful what you ask for - they're just as likely to do something along 
the lines of following, and bypass REFRPROT all the time ...
<quote>
| Note that debuggers, such as TSO TEST and UNIX debugging 
| environments, will override REFRPROT protection for particular TCBs so 
| that they can modify module storage in order to set breakpoints. 
</quote>

Shane ...

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