[PATCH v5 13/20] x86/kexec: Mark relocate_kernel page as ROX instead of RWX

[David Woodhouse]

On Thu, 2024-12-12 at 11:03 +0800, Ning, Hongyu wrote:
> 
> Hi David,
> 
> I've hit some kdump/kexec regression issue for guest kernel in KVM/QEMU 
> based VM and reported in https://bugzilla.kernel.org/show_bug.cgi?id=219592.
> 
> based on further git bisect, it seems to be related with this commit,
> would you help to take a look?

Thanks for the report; I'll take a look. Please could you share your
kernel .config?

Also, you say that this is in QEMU running on an IA64 host. Is that
true, or did you mean x86_64 host? Are you using OVMF or SeaBIOS as the
QEMU firmware?

In the short term, I think that just reverting the 'offending' commit
should be OK. I'd *prefer* not to leave the page RWX for the whole time
period that the image is loaded, but that's how it's been on i386 for
ever anyway.
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