If you're referring to OS/360, even MVT was a Swiss cheese. As for MVS, there were certainly installations that shot themselves in the foot, but I doubt that there were ever half a dozen known integrity exposures in IBM's code at the same time.
-- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Assembler List <[email protected]> on behalf of Charles Mills <[email protected]> Sent: Saturday, August 8, 2020 5:19 PM To: [email protected] Subject: Re: Case Study: IBM SYSTEM/360-370 ARCHITECTURE (1987) Or a dozen or more other non-magic ways of getting into supervisor state. Charles -----Original Message----- From: IBM Mainframe Assembler List [mailto:[email protected]] On Behalf Of Robert Netzlof Sent: Saturday, August 8, 2020 10:20 AM To: [email protected] Subject: Re: Case Study: IBM SYSTEM/360-370 ARCHITECTURE (1987) But do remember that in Ye Gude Auld Days, there was a widely known "magic" SVC which granted authorization to the user. On 8/8/20, Doug Wegscheid <[email protected]> wrote: > Site-specific SVC to do so? > > On Saturday, August 8, 2020, 12:11:14 PM EDT, <[email protected]> > wrote: > > Interesting are the two paragraphs on page 302, bottom RHS. > > Case says that nobody used the ASCII capability of the S/360. > > Padegs says that "none of our operating systems were [sic] programmed > to turn in the [ASCII] bit". > > So, no-one was able to use the ASCII facility. > > On 2020-08-08 12:19, Jim Mulder wrote: >> https://secure-web.cisco.com/1BEZXLLirhr8iVyJvinGMvcSSpuLxffS5lC_0gurza2yeQqqXl1Cu5iKvKontNtxdgL_bJ3KDzCPUqy4K6JztHf8b5TtpbrwtxSBPohVfBXHavDinuDdmlvt4o27CsOqBZcNO1Zzl8Nj28qZAfs9QOW8uJ00o2t14uc_o9qJw48qJjcghhsJ4O_LCILmS0Eu6T8HITDvnE0QTWvYdSx_n43XkZbHbYbDjKAkrdpkj_O3MJoU9ltU2szVIUbOles3o5inhIRSrPpYQqp8e2NjslRtJWzMutBj8jF4RzqWTWWr3JruB9gTniVtvb--mNZ9v7FBIcAiNVMFzrsx3qxglkMStx9ST1nfobJyXeH982F98OtIxb7EwDhz9_HvoshLCbeccucIg2mmLTLfm5XRNwNsCQTuMQfRx2NOZNGkByethG6fEuX3a0uXVuGEwMO7M/https%3A%2F%2Fwww.cs.tufts.edu%2Fcomp%2F150FP%2Farchive%2Falfred-spector%2Fspector87ibm.pdf >> >> >> Jim Mulder z/OS Diagnosis, Design, Development, Test IBM Corp. >> Poughkeepsie NY > > -- Bob Netzlof a/k/a Sweet Old Bob
