[PATCH 0/3 v11] add reserved e820 ranges to the kdump kernel e820 table

Borislav Petkov bp at alien8.de
Sat Jun 8 02:10:30 PDT 2019


On Sat, Jun 08, 2019 at 11:54:51AM +0800, Baoquan He wrote:
> Is it a UEFI box?

Yes.

> If it's uefi machine, it should relate to below issue. Because kexec
> always fails to randomly choose a new position for kernel.

The kernel succeeds in selecting a position for the kernel - the kexec
kernel doesn't load when a panic happens. Rather, the box panics and
nothing more.

> The current kexec code fills boot_params->efi_info->efi_loader_signature,
> but doesn't contruct efi_memmap table. The kexec/kdump kernel will always
> fail to find available slot for KASLR in process_efi_entries.

Kernel has

# CONFIG_RANDOMIZE_BASE is not set

so no KASLR.

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.



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