30 lines
1.0 KiB
Diff
30 lines
1.0 KiB
Diff
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From: Josh Boyer <jwboyer@redhat.com>
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Date: Wed, 5 Apr 2017 17:40:31 +0100
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Subject: [55/62] 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=1e915addf2f56a29d84dfc899017a926de9c0264
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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 circumvent any restrictions imposed on
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loading modules. Ignore 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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---
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drivers/acpi/osl.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
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index db78d353bab1..d4d4ba348451 100644
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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_root_pointer(void)
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acpi_physical_address pa = 0;
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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())
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return acpi_rsdp;
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#endif
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