From: Heinrich Schuchardt <xypron.glpk@gmx.de>
Date: Sat, 20 Apr 2019 19:24:43 +0000 (+0000)
Subject: efi_loader: correctly split device path of loaded image
X-Git-Tag: v2019.07-rc1~8^2~7
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=1e15a9cb7f2d616325cd855895b5f1283c1ac911;p=oweals%2Fu-boot.git

efi_loader: correctly split device path of loaded image

When the LoadImage() service is called for an image that is already loaded
to memory the file path may be NULL or it will contain both a device path
as well as a media path. We should not assume that there is no media path.

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 abc295e392..72897dc2c8 100644
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -1699,19 +1699,11 @@ efi_status_t EFIAPI efi_load_image(bool boot_policy,
 					       &source_size);
 		if (ret != EFI_SUCCESS)
 			goto error;
-		/*
-		 * split file_path which contains both the device and
-		 * file parts:
-		 */
-		efi_dp_split_file_path(file_path, &dp, &fp);
 	} else {
-		/* In this case, file_path is the "device" path, i.e.
-		 * something like a HARDWARE_DEVICE:MEMORY_MAPPED
-		 */
 		dest_buffer = source_buffer;
-		dp = file_path;
-		fp = NULL;
 	}
+	/* split file_path which contains both the device and file parts */
+	efi_dp_split_file_path(file_path, &dp, &fp);
 	ret = efi_setup_loaded_image(dp, fp, image_obj, &info);
 	if (ret == EFI_SUCCESS)
 		ret = efi_load_pe(*image_obj, dest_buffer, info);