31 lines
1.2 KiB
Diff
31 lines
1.2 KiB
Diff
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From: Dave Young <dyoung@redhat.com>
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[PATCH] kexec/uefi: copy secure_boot flag in boot params across kexec reboot
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Kexec reboot in case secure boot being enabled does not keep the secure boot
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mode in new kernel, so later one can load unsigned kernel via legacy kexec_load.
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In this state, the system is missing the protections provided by secure boot.
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Adding a patch to fix this by retain the secure_boot flag in original kernel.
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secure_boot flag in boot_params is set in EFI stub, but kexec bypasses the stub.
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Fixing this issue by copying secure_boot flag across kexec reboot.
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Signed-off-by: Dave Young <dyoung@redhat.com>
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---
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arch/x86/kernel/kexec-bzimage64.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/arch/x86/kernel/kexec-bzimage64.c b/arch/x86/kernel/kexec-bzimage64.c
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index 9642b9b..0539ec7 100644
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--- a/arch/x86/kernel/kexec-bzimage64.c
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+++ b/arch/x86/kernel/kexec-bzimage64.c
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@@ -178,6 +178,7 @@ setup_efi_state(struct boot_params *params, unsigned long params_load_addr,
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if (efi_enabled(EFI_OLD_MEMMAP))
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return 0;
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+ params->secure_boot = boot_params.secure_boot;
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ei->efi_loader_signature = current_ei->efi_loader_signature;
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ei->efi_systab = current_ei->efi_systab;
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ei->efi_systab_hi = current_ei->efi_systab_hi;
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