efi_loader: rounding of image size

We should not first allocate memory and then report a rounded up value as
image size. Instead first round up according to section allocation and then
allocate the memory.

Fixes: 82786754b9d2 ("efi_loader: ImageSize must be multiple of SectionAlignment")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>

diff --git a/lib/efi_loader/efi_image_loader.c b/lib/efi_loader/efi_image_loader.c
index 838e3a7..e9572d4 100644 (file)
--- a/lib/efi_loader/efi_image_loader.c
+++ b/lib/efi_loader/efi_image_loader.c
@@ -898,6 +898,7 @@ 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);
                if (!efi_reloc) {
@@ -908,12 +909,12 @@ efi_status_t efi_load_pe(struct efi_loaded_image_obj *handle,
                handle->entry = efi_reloc + opt->AddressOfEntryPoint;
                rel_size = opt->DataDirectory[rel_idx].Size;
                rel = efi_reloc + opt->DataDirectory[rel_idx].VirtualAddress;
-               virt_size = ALIGN(virt_size, opt->SectionAlignment);
        } else if (nt->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR32_MAGIC) {
                IMAGE_OPTIONAL_HEADER32 *opt = &nt->OptionalHeader;
                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);
                if (!efi_reloc) {
@@ -924,7 +925,6 @@ efi_status_t efi_load_pe(struct efi_loaded_image_obj *handle,
                handle->entry = efi_reloc + opt->AddressOfEntryPoint;
                rel_size = opt->DataDirectory[rel_idx].Size;
                rel = efi_reloc + opt->DataDirectory[rel_idx].VirtualAddress;
-               virt_size = ALIGN(virt_size, opt->SectionAlignment);
        } else {
                log_err("Invalid optional header magic %x\n",
                        nt->OptionalHeader.Magic);