Re: [x86] 45fc8757d1: BUG:unable_to_handle_kernel

From	Linus Torvalds <torvalds@linux-foundation.org>
Newsgroups	linux.kernel
Subject	Re: [x86] 45fc8757d1: BUG:unable_to_handle_kernel
Date	2017-03-17 22:50 +0100
Message-ID	<tm6vT-3sM-7@gated-at.bofh.it> (permalink)
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On Fri, Mar 17, 2017 at 11:20 AM, Andy Lutomirski <luto@kernel.org> wrote:
>
> I can easily imagine that breaking WINE or DOSEMU because it'll affect
> the LDT, too.

Can they even *read* the LDT contents, though? The whole accessed bit
doesn't show up in 'struct user_desc', so you can neither set it nor
read it.

> How about this:

I don't think that's _wrong_, but..

I'd really rather just do it in fill_ldt() itself, unless you can
explain how it would be visible to anybody..

               Linus

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Re: [x86] 45fc8757d1: BUG:unable_to_handle_kernel Linus Torvalds <torvalds@linux-foundation.org> - 2017-03-17 19:00 +0100
  Re: [x86] 45fc8757d1: BUG:unable_to_handle_kernel Linus Torvalds <torvalds@linux-foundation.org> - 2017-03-17 19:10 +0100
    Re: [x86] 45fc8757d1: BUG:unable_to_handle_kernel Linus Torvalds <torvalds@linux-foundation.org> - 2017-03-17 19:10 +0100
      Re: [x86] 45fc8757d1: BUG:unable_to_handle_kernel Andy Lutomirski <luto@kernel.org> - 2017-03-17 19:30 +0100
        Re: [x86] 45fc8757d1: BUG:unable_to_handle_kernel Andy Lutomirski <luto@amacapital.net> - 2017-03-17 21:20 +0100
          Re: [x86] 45fc8757d1: BUG:unable_to_handle_kernel Linus Torvalds <torvalds@linux-foundation.org> - 2017-03-17 22:20 +0100
        Re: [x86] 45fc8757d1: BUG:unable_to_handle_kernel Linus Torvalds <torvalds@linux-foundation.org> - 2017-03-17 22:50 +0100

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