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Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_
From: |
Jason A. Donenfeld |
Subject: |
Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data |
Date: |
Wed, 28 Dec 2022 17:57:54 +0100 |
HELLO H. PETER ANVIN,
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On Wed, Dec 28, 2022 at 05:30:30PM +0100, Jason A. Donenfeld wrote:
> > Fix looks good, glad you figured out the problem.
>
> I mean, kind of. The solution here sucks, especially given that in the
> worst case, setup_data just gets dropped. I'm half inclined to consider
> this a kernel bug instead, and add some code to relocate setup_data
> prior to decompression, and then fix up all the links. It seems like
> this would be a lot more robust.
>
> I just wish the people who wrote this stuff would chime in. I've had
> x86@kernel.org CC'd but so far, no input from them.
Apparently you are the x86 boot guru. What do you want to happen here?
Your input would be very instrumental.
Jason
- [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data, Jason A. Donenfeld, 2022/12/28
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data, Philippe Mathieu-Daudé, 2022/12/28
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data, Jason A. Donenfeld, 2022/12/28
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data,
Jason A. Donenfeld <=
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data, H. Peter Anvin, 2022/12/28
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data, H. Peter Anvin, 2022/12/28
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data, Jason A. Donenfeld, 2022/12/28
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data, Philippe Mathieu-Daudé, 2022/12/29
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data, H. Peter Anvin, 2022/12/29
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data, H. Peter Anvin, 2022/12/29
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data, Borislav Petkov, 2022/12/29
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data, Jason A. Donenfeld, 2022/12/30
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data, Borislav Petkov, 2022/12/30
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data, Jason A. Donenfeld, 2022/12/30