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From: Anthony Martin <ality@pbrane.org>
To: 9front@9front.org
Subject: [9front] Re: [PATCH] kernel: disallow executing from #| or #d
Date: Tue, 10 May 2022 13:52:20 -0700	[thread overview]
Message-ID: <YnrQhMox4b9ncElU@alice> (raw)
In-Reply-To: <28db6450-6d7c-977f-aaff-62f152e79968@posixcafe.org>

Jacob Moody <moody@mail.posixcafe.org> once said:
> I believe this would also work for binaries
> if the writer could predict what parts of the binary
> the kernel will want to read. I am inclined to
> block this behavior but would be curious what others
> think. Included is a patch to error on OEXEC opens
> in devdup and devpipe.

OREAD and OEXEC are essentially the same thing on
Plan 9. If you can open and read a file, you can always
just copy the contents to a new file that you own and
change the mode. Unix retains the illusion.

Cheers,
  Anthony

      parent reply	other threads:[~2022-05-10 20:54 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-10  6:40 [9front] " Jacob Moody
2022-05-10 14:40 ` ori
2022-05-10 16:34   ` Jacob Moody
2022-05-10 19:59     ` Amavect
2022-05-10 22:47       ` Jacob Moody
2022-05-11  4:21         ` Amavect
2022-05-11  6:31           ` Jacob Moody
2022-05-11 16:32             ` Amavect
2022-05-11 16:50               ` Jacob Moody
2022-05-15  2:43                 ` Amavect
2022-05-15 15:26                   ` Amavect
2022-05-15 16:28                     ` Jacob Moody
2022-05-10 20:52 ` Anthony Martin [this message]

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