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Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_
From: |
Borislav Petkov |
Subject: |
Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data |
Date: |
Sat, 31 Dec 2022 15:24:32 +0100 |
On Sat, Dec 31, 2022 at 02:51:28PM +0100, Jason A. Donenfeld wrote:
> That failure is unrelated to the ident mapping issue Peter and
> I discussed. The original failure is described in the commit message:
> decompression clobbers the data, so sd->next points to garbage.
Right, and the fact that the kernel overwrites it still feels kinda wrong: the
kernel knows where setup_data is - the address is in the setup header so
*actually*, it should take care of not to clobber it.
But hpa would correct me if I'm missing an aspect about whose responsibility it
is to do what here...
Thx.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data, (continued)
- 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, H. Peter Anvin, 2022/12/30
- 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, H. Peter Anvin, 2022/12/30
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data, H. Peter Anvin, 2022/12/30
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data, Jason A. Donenfeld, 2022/12/31
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data, Borislav Petkov, 2022/12/31
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data, Jason A. Donenfeld, 2022/12/31
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data, Borislav Petkov, 2022/12/31
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data, Jason A. Donenfeld, 2022/12/31
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data,
Borislav Petkov <=
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data, Jason A. Donenfeld, 2022/12/31
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data, Borislav Petkov, 2022/12/31
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data, H. Peter Anvin, 2022/12/31
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data, H. Peter Anvin, 2022/12/31
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data, H. Peter Anvin, 2022/12/31
- 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, Jason A. Donenfeld, 2022/12/30
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data, H. Peter Anvin, 2022/12/30
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data, Borislav Petkov, 2022/12/31
- Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup_data, Jason A. Donenfeld, 2022/12/31