efi_loader: do not miss last relocation block

If the last block in the relocation table contains only a single
relocation, the current coding ignores it.

Fix the determination of the end of the relocation table.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

diff --git a/lib/efi_loader/efi_image_loader.c b/lib/efi_loader/efi_image_loader.c
index cec17eabaa353c3fef96d5f8b524638dd94ff458..fe66e7b9ffe1146a8bb27e28403649071c4bbd04 100644 (file)
--- a/lib/efi_loader/efi_image_loader.c
+++ b/lib/efi_loader/efi_image_loader.c
@@ -111,7 +111,7 @@ static efi_status_t efi_loader_relocate(const IMAGE_BASE_RELOCATION *rel,
                return EFI_SUCCESS;
 
        end = (const IMAGE_BASE_RELOCATION *)((const char *)rel + rel_size);
-       while (rel < end - 1 && rel->SizeOfBlock) {
+       while (rel < end && rel->SizeOfBlock) {
                const uint16_t *relocs = (const uint16_t *)(rel + 1);
                i = (rel->SizeOfBlock - sizeof(*rel)) / sizeof(uint16_t);
                while (i--) {