31 lines
1.1 KiB
Diff
31 lines
1.1 KiB
Diff
From: Josh Boyer <jwboyer@redhat.com>
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Date: Wed, 8 Nov 2017 15:11:34 +0000
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Subject: [16/29] acpi: Ignore acpi_rsdp kernel param when the kernel has been
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locked down
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Origin: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/commit?id=67890a0361626ec3e035264656896c77670c414b
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This option allows userspace to pass the RSDP address to the kernel, which
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makes it possible for a user to modify the workings of hardware . Reject
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the option when the kernel is locked down.
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Signed-off-by: Josh Boyer <jwboyer@redhat.com>
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Signed-off-by: David Howells <dhowells@redhat.com>
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Reviewed-by: "Lee, Chun-Yi" <jlee@suse.com>
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cc: Dave Young <dyoung@redhat.com>
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cc: linux-acpi@vger.kernel.org
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---
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drivers/acpi/osl.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/drivers/acpi/osl.c
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+++ b/drivers/acpi/osl.c
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@@ -192,7 +192,7 @@ acpi_physical_address __init acpi_os_get
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acpi_physical_address pa;
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#ifdef CONFIG_KEXEC
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- if (acpi_rsdp)
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+ if (acpi_rsdp && !kernel_is_locked_down("ACPI RSDP specification"))
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return acpi_rsdp;
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#endif
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pa = acpi_arch_get_root_pointer();
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