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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Chris Coulson <chris.coulson@canonical.com>
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Date: Thu, 28 Apr 2022 21:53:36 +0100
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Subject: [PATCH] loader/efi/chainloader: grub_load_and_start_image doesn't
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load and start
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grub_load_and_start_image only loads an image - it still requires the
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caller to start it. This renames it to grub_load_image.
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It's called from 2 places:
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- grub_cmd_chainloader when not using the shim protocol.
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- grub_secureboot_chainloader_boot if handle_image returns an error.
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In this case, the image is loaded and then nothing else happens which
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seems strange. I assume the intention is that it falls back to LoadImage
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and StartImage if handle_image fails, so I've made it do that.
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Signed-off-by: Chris Coulson <chris.coulson@canonical.com>
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(cherry picked from commit b4d70820a65c00561045856b7b8355461a9545f6)
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(cherry picked from commit 05b16a6be50b1910609740a66b561276fa490538)
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---
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grub-core/loader/efi/chainloader.c | 16 +++++++++++++---
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1 file changed, 13 insertions(+), 3 deletions(-)
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diff --git a/grub-core/loader/efi/chainloader.c b/grub-core/loader/efi/chainloader.c
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index 3af6b12292..39158e679e 100644
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--- a/grub-core/loader/efi/chainloader.c
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+++ b/grub-core/loader/efi/chainloader.c
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@@ -841,7 +841,7 @@ grub_secureboot_chainloader_unload (void)
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}
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static grub_err_t
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-grub_load_and_start_image(void *boot_image)
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+grub_load_image(void *boot_image)
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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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@@ -883,13 +883,23 @@ grub_load_and_start_image(void *boot_image)
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static grub_err_t
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grub_secureboot_chainloader_boot (void)
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{
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+ grub_efi_boot_services_t *b;
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int rc;
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+
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rc = handle_image ((void *)(unsigned long)address, fsize);
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if (rc == 0)
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{
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- grub_load_and_start_image((void *)(unsigned long)address);
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+ /* We weren't able to attempt to execute the image, so fall back
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+ * to LoadImage / StartImage.
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+ */
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+ rc = grub_load_image((void *)(unsigned long)address);
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+ if (rc == 0)
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+ grub_chainloader_boot ();
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}
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+ b = grub_efi_system_table->boot_services;
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+ efi_call_1 (b->unload_image, image_handle);
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+
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grub_loader_unset ();
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return grub_errno;
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}
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@@ -1094,7 +1104,7 @@ grub_cmd_chainloader (grub_command_t cmd __attribute__ ((unused)),
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}
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else if (rc == 0)
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{
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- grub_load_and_start_image(boot_image);
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+ grub_load_image(boot_image);
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grub_file_close (file);
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grub_device_close (dev);
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grub_loader_set (grub_chainloader_boot, grub_chainloader_unload, 0);
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