efi_loader: LoadImage() check source size

If the size of the source buffer is 0, return EFI_LOAD_ERROR.
(UEFI SCT II 2017: 3.4.1 LoadImage() - 5.1.4.1.6)

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

diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
index ef9e3781899c371e2c2220afcc40b40deb444d87..89966a2f12904dc7f5a736f7e0e415cdd8233fe3 100644 (file)
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -1781,6 +1781,10 @@ efi_status_t EFIAPI efi_load_image(bool boot_policy,
                if (ret != EFI_SUCCESS)
                        goto error;
        } else {
+               if (!source_size) {
+                       ret = EFI_LOAD_ERROR;
+                       goto error;
+               }
                dest_buffer = source_buffer;
        }
        /* split file_path which contains both the device and file parts */