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Date: Sat, 8 Jun 2019 11:10:30 +0200 From: Borislav Petkov <bp@...en8.de> To: Baoquan He <bhe@...hat.com> Cc: lijiang <lijiang@...hat.com>, linux-kernel@...r.kernel.org, kexec@...ts.infradead.org, tglx@...utronix.de, mingo@...hat.com, akpm@...ux-foundation.org, dave.hansen@...ux.intel.com, luto@...nel.org, peterz@...radead.org, x86@...nel.org, hpa@...or.com, dyoung@...hat.com, Thomas.Lendacky@....com Subject: Re: [PATCH 0/3 v11] add reserved e820 ranges to the kdump kernel e820 table 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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