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efi_loader: Fix loaded image alignment

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We are ignoring the alignment communicated via the PE/COFF header.
Starting 5.10 the Linux kernel will loudly complain about it. For more
details look at [1] (in linux kernel).

So add a function that can allocate aligned EFI memory and use it for our
relocated loaded image.

[1] c32ac11da3f83 ("efi/libstub: arm64: Double check image alignment at entry")

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Tested-by: Vincent Stehlé <vincent.stehle@arm.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Ilias Apalodimas
2021-10-11 15:10:23 +03:00
committed by Heinrich Schuchardt
parent fa00b6fc3f
commit ebdea88d57
3 changed files with 60 additions and 6 deletions
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12
lib/efi_loader/efi_image_loader.c
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@@ -898,9 +898,9 @@ efi_status_t efi_load_pe(struct efi_loaded_image_obj *handle,
image_base = opt->ImageBase;
efi_set_code_and_data_type(loaded_image_info, opt->Subsystem);
handle->image_type = opt->Subsystem;
virt_size = ALIGN(virt_size, opt->SectionAlignment);
efi_reloc = efi_alloc(virt_size,
loaded_image_info->image_code_type);
efi_reloc = efi_alloc_aligned_pages(virt_size,
loaded_image_info->image_code_type,
opt->SectionAlignment);
if (!efi_reloc) {
log_err("Out of memory\n");
ret = EFI_OUT_OF_RESOURCES;
@@ -914,9 +914,9 @@ efi_status_t efi_load_pe(struct efi_loaded_image_obj *handle,
image_base = opt->ImageBase;
efi_set_code_and_data_type(loaded_image_info, opt->Subsystem);
handle->image_type = opt->Subsystem;
virt_size = ALIGN(virt_size, opt->SectionAlignment);
efi_reloc = efi_alloc(virt_size,
loaded_image_info->image_code_type);
efi_reloc = efi_alloc_aligned_pages(virt_size,
loaded_image_info->image_code_type,
opt->SectionAlignment);
if (!efi_reloc) {
log_err("Out of memory\n");
ret = EFI_OUT_OF_RESOURCES;