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436 lines
13 KiB
436 lines
13 KiB
From 0c0ca3a51e6edda6900a3f812c3a442a57b9c8d1 Mon Sep 17 00:00:00 2001 |
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From: Peter Jones <pjones@redhat.com> |
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Date: Thu, 18 Sep 2014 11:26:14 -0400 |
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Subject: [PATCH 152/237] Load arm with SB enabled. |
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Make sure we actually try to validate secure boot on this platform (even |
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though we're not shipping it enabled by default.) |
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|
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This means giving the kernel grub's loaded image as the vehicle for the |
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kernel command line, because we can't call systab->bs->LoadImage() if SB |
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is enabled. |
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--- |
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grub-core/Makefile.core.def | 2 + |
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grub-core/loader/arm64/linux.c | 108 ++++++++++++++++++++------------------ |
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grub-core/loader/efi/linux.c | 65 +++++++++++++++++++++++ |
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grub-core/loader/i386/efi/linux.c | 39 ++------------ |
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include/grub/arm64/linux.h | 8 +++ |
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include/grub/efi/linux.h | 31 +++++++++++ |
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6 files changed, 166 insertions(+), 87 deletions(-) |
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create mode 100644 grub-core/loader/efi/linux.c |
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create mode 100644 include/grub/efi/linux.h |
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diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def |
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index 9ff9ae5..9378c73 100644 |
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--- a/grub-core/Makefile.core.def |
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+++ b/grub-core/Makefile.core.def |
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@@ -1682,6 +1682,7 @@ module = { |
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ia64_efi = loader/ia64/efi/linux.c; |
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arm = loader/arm/linux.c; |
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arm64 = loader/arm64/linux.c; |
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+ arm64 = loader/efi/linux.c; |
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fdt = lib/fdt.c; |
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common = loader/linux.c; |
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common = lib/cmdline.c; |
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@@ -1718,6 +1719,7 @@ module = { |
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name = linuxefi; |
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efi = loader/i386/efi/linux.c; |
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efi = lib/cmdline.c; |
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+ efi = loader/efi/linux.c; |
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enable = i386_efi; |
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enable = x86_64_efi; |
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}; |
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diff --git a/grub-core/loader/arm64/linux.c b/grub-core/loader/arm64/linux.c |
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index 0dc144e..bdd9c9b 100644 |
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--- a/grub-core/loader/arm64/linux.c |
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+++ b/grub-core/loader/arm64/linux.c |
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@@ -27,6 +27,7 @@ |
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#include <grub/types.h> |
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#include <grub/cpu/linux.h> |
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#include <grub/efi/efi.h> |
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+#include <grub/efi/linux.h> |
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#include <grub/efi/pe32.h> |
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#include <grub/i18n.h> |
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#include <grub/lib/cmdline.h> |
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@@ -44,6 +45,7 @@ static int loaded; |
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static void *kernel_addr; |
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static grub_uint64_t kernel_size; |
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+static grub_uint32_t handover_offset; |
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static char *linux_args; |
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static grub_uint32_t cmdline_size; |
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@@ -135,7 +137,9 @@ finalize_params (void) |
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{ |
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grub_efi_boot_services_t *b; |
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grub_efi_status_t status; |
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+ grub_efi_loaded_image_t *loaded_image = NULL; |
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int node, retval; |
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+ int len; |
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get_fdt (); |
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if (!fdt) |
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@@ -172,6 +176,23 @@ finalize_params (void) |
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grub_dprintf ("linux", "Installed/updated FDT configuration table @ %p\n", |
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fdt); |
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+ /* Convert command line to UCS-2 */ |
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+ loaded_image = grub_efi_get_loaded_image (grub_efi_image_handle); |
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+ if (!loaded_image) |
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+ goto failure; |
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+ |
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+ loaded_image->load_options_size = len = |
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+ (grub_strlen (linux_args) + 1) * sizeof (grub_efi_char16_t); |
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+ loaded_image->load_options = |
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+ grub_efi_allocate_pages (0, |
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+ BYTES_TO_PAGES (loaded_image->load_options_size)); |
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+ if (!loaded_image->load_options) |
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+ return grub_error(GRUB_ERR_BAD_OS, "failed to create kernel parameters"); |
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+ |
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+ loaded_image->load_options_size = |
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+ 2 * grub_utf8_to_utf16 (loaded_image->load_options, len, |
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+ (grub_uint8_t *) linux_args, len, NULL); |
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+ |
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return GRUB_ERR_NONE; |
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failure: |
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@@ -181,6 +202,23 @@ failure: |
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return grub_error(GRUB_ERR_BAD_OS, "failed to install/update FDT"); |
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} |
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+static void |
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+free_params (void) |
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+{ |
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+ grub_efi_loaded_image_t *loaded_image = NULL; |
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+ |
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+ loaded_image = grub_efi_get_loaded_image (grub_efi_image_handle); |
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+ if (loaded_image) |
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+ { |
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+ if (loaded_image->load_options) |
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+ grub_efi_free_pages ((grub_efi_physical_address_t) |
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+ loaded_image->load_options, |
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+ BYTES_TO_PAGES (loaded_image->load_options_size)); |
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+ loaded_image->load_options = NULL; |
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+ loaded_image->load_options_size = 0; |
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+ } |
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+} |
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+ |
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static grub_err_t |
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grub_cmd_devicetree (grub_command_t cmd __attribute__ ((unused)), |
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int argc, char *argv[]) |
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@@ -199,6 +237,10 @@ grub_cmd_devicetree (grub_command_t cmd __attribute__ ((unused)), |
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if (argc != 1) |
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return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected")); |
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+ if (grub_efi_secure_boot ()) |
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+ return grub_error (GRUB_ERR_INVALID_COMMAND, |
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+ N_("Not loading devicetree - Secure Boot is enabled")); |
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+ |
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if (loaded_fdt) |
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grub_free (loaded_fdt); |
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loaded_fdt = NULL; |
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@@ -243,65 +285,20 @@ out: |
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static grub_err_t |
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grub_linux_boot (void) |
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{ |
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- grub_efi_memory_mapped_device_path_t *mempath; |
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- grub_efi_handle_t image_handle; |
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- grub_efi_boot_services_t *b; |
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- grub_efi_status_t status; |
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grub_err_t retval; |
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- grub_efi_loaded_image_t *loaded_image; |
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- int len; |
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retval = finalize_params(); |
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if (retval != GRUB_ERR_NONE) |
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return retval; |
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- mempath = grub_malloc (2 * sizeof (grub_efi_memory_mapped_device_path_t)); |
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- if (!mempath) |
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- return grub_errno; |
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- |
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- mempath[0].header.type = GRUB_EFI_HARDWARE_DEVICE_PATH_TYPE; |
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- mempath[0].header.subtype = GRUB_EFI_MEMORY_MAPPED_DEVICE_PATH_SUBTYPE; |
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- mempath[0].header.length = grub_cpu_to_le16_compile_time (sizeof (*mempath)); |
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- mempath[0].memory_type = GRUB_EFI_LOADER_DATA; |
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- mempath[0].start_address = (grub_addr_t) kernel_addr; |
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- mempath[0].end_address = (grub_addr_t) kernel_addr + kernel_size; |
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- |
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- mempath[1].header.type = GRUB_EFI_END_DEVICE_PATH_TYPE; |
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- mempath[1].header.subtype = GRUB_EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE; |
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- mempath[1].header.length = sizeof (grub_efi_device_path_t); |
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- |
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- b = grub_efi_system_table->boot_services; |
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- status = b->load_image (0, grub_efi_image_handle, |
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- (grub_efi_device_path_t *) mempath, |
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- kernel_addr, kernel_size, &image_handle); |
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- if (status != GRUB_EFI_SUCCESS) |
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- return grub_error (GRUB_ERR_BAD_OS, "cannot load image"); |
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- |
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grub_dprintf ("linux", "linux command line: '%s'\n", linux_args); |
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- /* Convert command line to UCS-2 */ |
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- loaded_image = grub_efi_get_loaded_image (image_handle); |
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- loaded_image->load_options_size = len = |
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- (grub_strlen (linux_args) + 1) * sizeof (grub_efi_char16_t); |
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- loaded_image->load_options = |
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- grub_efi_allocate_pages (0, |
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- BYTES_TO_PAGES (loaded_image->load_options_size)); |
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- if (!loaded_image->load_options) |
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- return grub_errno; |
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+ retval = grub_efi_linux_boot ((char *)kernel_addr, handover_offset, |
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+ kernel_addr); |
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- loaded_image->load_options_size = |
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- 2 * grub_utf8_to_utf16 (loaded_image->load_options, len, |
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- (grub_uint8_t *) linux_args, len, NULL); |
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- |
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- grub_dprintf("linux", "starting image %p\n", image_handle); |
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- status = b->start_image (image_handle, 0, NULL); |
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- |
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- /* When successful, not reached */ |
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- b->unload_image (image_handle); |
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- grub_efi_free_pages ((grub_efi_physical_address_t) loaded_image->load_options, |
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- BYTES_TO_PAGES (loaded_image->load_options_size)); |
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- |
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- return grub_errno; |
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+ /* Never reached... */ |
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+ free_params(); |
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+ return retval; |
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} |
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|
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static grub_err_t |
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@@ -382,6 +379,7 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)), |
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{ |
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grub_file_t file = 0; |
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struct grub_arm64_linux_kernel_header lh; |
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+ struct grub_arm64_linux_pe_header *pe; |
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grub_dl_ref (my_mod); |
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@@ -426,6 +424,15 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)), |
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grub_dprintf ("linux", "kernel @ %p\n", kernel_addr); |
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+ if (!grub_linuxefi_secure_validate (kernel_addr, kernel_size)) |
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+ { |
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+ grub_error (GRUB_ERR_INVALID_COMMAND, N_("%s has invalid signature"), argv[0]); |
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+ goto fail; |
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+ } |
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+ |
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+ pe = (void *)((unsigned long)kernel_addr + lh.hdr_offset); |
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+ handover_offset = pe->opt.entry_addr; |
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+ |
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cmdline_size = grub_loader_cmdline_size (argc, argv) + sizeof (LINUX_IMAGE); |
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linux_args = grub_malloc (cmdline_size); |
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if (!linux_args) |
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@@ -464,7 +471,6 @@ fail: |
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return grub_errno; |
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} |
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- |
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static grub_command_t cmd_linux, cmd_initrd, cmd_devicetree; |
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GRUB_MOD_INIT (linux) |
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diff --git a/grub-core/loader/efi/linux.c b/grub-core/loader/efi/linux.c |
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new file mode 100644 |
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index 0000000..aea378a |
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--- /dev/null |
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+++ b/grub-core/loader/efi/linux.c |
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@@ -0,0 +1,65 @@ |
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+/* |
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+ * GRUB -- GRand Unified Bootloader |
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+ * Copyright (C) 2014 Free Software Foundation, Inc. |
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+ * |
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+ * GRUB is free software: you can redistribute it and/or modify |
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+ * it under the terms of the GNU General Public License as published by |
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+ * the Free Software Foundation, either version 3 of the License, or |
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+ * (at your option) any later version. |
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+ * |
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+ * GRUB is distributed in the hope that it will be useful, |
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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+ * GNU General Public License for more details. |
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+ * |
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+ * You should have received a copy of the GNU General Public License |
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+ * along with GRUB. If not, see <http://www.gnu.org/licenses/>. |
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+ */ |
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+ |
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+#include <grub/err.h> |
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+#include <grub/mm.h> |
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+#include <grub/types.h> |
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+#include <grub/cpu/linux.h> |
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+#include <grub/efi/efi.h> |
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+#include <grub/efi/pe32.h> |
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+#include <grub/efi/linux.h> |
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+ |
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+#define SHIM_LOCK_GUID \ |
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+ { 0x605dab50, 0xe046, 0x4300, {0xab, 0xb6, 0x3d, 0xd8, 0x10, 0xdd, 0x8b, 0x23} } |
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+ |
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+struct grub_efi_shim_lock |
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+{ |
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+ grub_efi_status_t (*verify) (void *buffer, grub_uint32_t size); |
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+}; |
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+typedef struct grub_efi_shim_lock grub_efi_shim_lock_t; |
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+ |
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+grub_efi_boolean_t |
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+grub_linuxefi_secure_validate (void *data, grub_uint32_t size) |
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+{ |
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+ grub_efi_guid_t guid = SHIM_LOCK_GUID; |
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+ grub_efi_shim_lock_t *shim_lock; |
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+ |
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+ shim_lock = grub_efi_locate_protocol(&guid, NULL); |
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+ |
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+ if (!shim_lock) |
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+ return 1; |
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+ |
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+ if (shim_lock->verify(data, size) == GRUB_EFI_SUCCESS) |
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+ return 1; |
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+ |
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+ return 0; |
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+} |
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+ |
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+typedef void (*handover_func) (void *, grub_efi_system_table_t *, void *); |
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+ |
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+grub_err_t |
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+grub_efi_linux_boot (void *kernel_addr, grub_off_t offset, |
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+ void *kernel_params) |
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+{ |
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+ handover_func hf; |
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+ |
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+ hf = (handover_func)((char *)kernel_addr + offset); |
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+ hf (grub_efi_image_handle, grub_efi_system_table, kernel_params); |
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+ |
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+ return GRUB_ERR_BUG; |
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+} |
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diff --git a/grub-core/loader/i386/efi/linux.c b/grub-core/loader/i386/efi/linux.c |
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index b79e632..e5b7785 100644 |
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--- a/grub-core/loader/i386/efi/linux.c |
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+++ b/grub-core/loader/i386/efi/linux.c |
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@@ -26,6 +26,7 @@ |
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#include <grub/i18n.h> |
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#include <grub/lib/cmdline.h> |
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#include <grub/efi/efi.h> |
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+#include <grub/efi/linux.h> |
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GRUB_MOD_LICENSE ("GPLv3+"); |
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@@ -40,52 +41,18 @@ static char *linux_cmdline; |
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#define BYTES_TO_PAGES(bytes) (((bytes) + 0xfff) >> 12) |
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-#define SHIM_LOCK_GUID \ |
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- { 0x605dab50, 0xe046, 0x4300, {0xab, 0xb6, 0x3d, 0xd8, 0x10, 0xdd, 0x8b, 0x23} } |
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- |
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-struct grub_efi_shim_lock |
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-{ |
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- grub_efi_status_t (*verify) (void *buffer, grub_uint32_t size); |
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-}; |
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-typedef struct grub_efi_shim_lock grub_efi_shim_lock_t; |
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- |
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-static grub_efi_boolean_t |
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-grub_linuxefi_secure_validate (void *data, grub_uint32_t size) |
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-{ |
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- grub_efi_guid_t guid = SHIM_LOCK_GUID; |
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- grub_efi_shim_lock_t *shim_lock; |
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- |
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- shim_lock = grub_efi_locate_protocol(&guid, NULL); |
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- |
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- if (!shim_lock) |
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- return 1; |
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- |
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- if (shim_lock->verify(data, size) == GRUB_EFI_SUCCESS) |
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- return 1; |
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- |
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- return 0; |
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-} |
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- |
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-typedef void(*handover_func)(void *, grub_efi_system_table_t *, struct linux_kernel_params *); |
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- |
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static grub_err_t |
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grub_linuxefi_boot (void) |
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{ |
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- handover_func hf; |
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int offset = 0; |
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#ifdef __x86_64__ |
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offset = 512; |
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#endif |
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- |
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- hf = (handover_func)((char *)kernel_mem + handover_offset + offset); |
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- |
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asm volatile ("cli"); |
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- hf (grub_efi_image_handle, grub_efi_system_table, params); |
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- |
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- /* Not reached */ |
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- return GRUB_ERR_NONE; |
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+ return grub_efi_linux_boot ((char *)kernel_mem, handover_offset + offset, |
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+ params); |
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} |
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|
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static grub_err_t |
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diff --git a/include/grub/arm64/linux.h b/include/grub/arm64/linux.h |
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index 864e5dc..2cbd64f 100644 |
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--- a/include/grub/arm64/linux.h |
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+++ b/include/grub/arm64/linux.h |
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@@ -20,6 +20,7 @@ |
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#define GRUB_LINUX_CPU_HEADER 1 |
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#include <grub/efi/efi.h> |
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+#include <grub/efi/pe32.h> |
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#define GRUB_ARM64_LINUX_MAGIC 0x644d5241 /* 'ARM\x64' */ |
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@@ -38,4 +39,11 @@ struct grub_arm64_linux_kernel_header |
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grub_uint32_t hdr_offset; /* Offset of PE/COFF header */ |
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}; |
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+struct grub_arm64_linux_pe_header |
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+{ |
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+ grub_uint32_t magic; |
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+ struct grub_pe32_coff_header coff; |
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+ struct grub_pe64_optional_header opt; |
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+}; |
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+ |
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#endif /* ! GRUB_LINUX_CPU_HEADER */ |
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diff --git a/include/grub/efi/linux.h b/include/grub/efi/linux.h |
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new file mode 100644 |
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index 0000000..d9ede36 |
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--- /dev/null |
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+++ b/include/grub/efi/linux.h |
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@@ -0,0 +1,31 @@ |
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+/* |
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+ * GRUB -- GRand Unified Bootloader |
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+ * Copyright (C) 2014 Free Software Foundation, Inc. |
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+ * |
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+ * GRUB is free software: you can redistribute it and/or modify |
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+ * it under the terms of the GNU General Public License as published by |
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+ * the Free Software Foundation, either version 3 of the License, or |
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+ * (at your option) any later version. |
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+ * |
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+ * GRUB is distributed in the hope that it will be useful, |
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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+ * GNU General Public License for more details. |
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+ * |
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+ * You should have received a copy of the GNU General Public License |
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+ * along with GRUB. If not, see <http://www.gnu.org/licenses/>. |
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+ */ |
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+#ifndef GRUB_EFI_LINUX_HEADER |
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+#define GRUB_EFI_LINUX_HEADER 1 |
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+ |
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+#include <grub/efi/api.h> |
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+#include <grub/err.h> |
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+#include <grub/symbol.h> |
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+ |
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+grub_efi_boolean_t |
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+EXPORT_FUNC(grub_linuxefi_secure_validate) (void *data, grub_uint32_t size); |
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+grub_err_t |
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+EXPORT_FUNC(grub_efi_linux_boot) (void *kernel_address, grub_off_t offset, |
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+ void *kernel_param); |
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+ |
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+#endif /* ! GRUB_EFI_LINUX_HEADER */ |
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-- |
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2.9.3 |
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