Pull request for UEFI sub-system for efi-2020-07-rc2

This pull request contains bug fixes needed due to the merged changes for
 EFI secure boot.
 
 Patches are supplied to identify EFI system partitions.
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Merge tag 'efi-2020-07-rc2' of https://gitlab.denx.de/u-boot/custodians/u-boot-efi

Pull request for UEFI sub-system for efi-2020-07-rc2

This pull request contains bug fixes needed due to the merged changes for
EFI secure boot.

Patches are supplied to identify EFI system partitions.

MAINTAINERS

@@ -625,6 +625,7 @@ F:	include/asm-generic/pe.h
 F:	lib/charset.c
 F:	lib/efi*/
 F:	test/py/tests/test_efi*
+F:	test/py/tests/test_efi*/
 F:	test/unicode_ut.c
 F:	cmd/bootefi.c
 F:	cmd/efidebug.c

cmd/bootefi.c

@@ -481,9 +481,7 @@ efi_status_t efi_run_image(void *source_buffer, efi_uintn_t source_size)
 	ret = do_bootefi_exec(handle);
 
 out:
-	if (mem_handle)
 	efi_delete_handle(mem_handle);
-	if (file_path)
 	efi_free_pool(file_path);
 	return ret;
 }

cmd/efidebug.c

@@ -395,6 +395,7 @@ static const char * const efi_mem_type_string[] = {
 	[EFI_MMAP_IO] = "IO",
 	[EFI_MMAP_IO_PORT] = "IO PORT",
 	[EFI_PAL_CODE] = "PAL",
+	[EFI_PERSISTENT_MEMORY_TYPE] = "PERSISTENT",
 };
 
 static const struct efi_mem_attrs {
@@ -482,7 +483,7 @@ static int do_efi_show_memmap(cmd_tbl_t *cmdtp, int flag,
 	printf("================ %.*s %.*s ==========\n",
 	       EFI_PHYS_ADDR_WIDTH, sep, EFI_PHYS_ADDR_WIDTH, sep);
 	for (i = 0, map = memmap; i < map_size / sizeof(*map); map++, i++) {
-		if (map->type < EFI_MAX_MEMORY_TYPE)
+		if (map->type < ARRAY_SIZE(efi_mem_type_string))
 			type = efi_mem_type_string[map->type];
 		else
 			type = "(unknown)";
@@ -682,13 +683,13 @@ static int do_efi_boot_rm(cmd_tbl_t *cmdtp, int flag,
 /**
  * show_efi_boot_opt_data() - dump UEFI load option
  *
- * @id:		load option number
+ * @varname16:	variable name
  * @data:	value of UEFI load option variable
  * @size:	size of the boot option
  *
  * Decode the value of UEFI load option variable and print information.
  */
-static void show_efi_boot_opt_data(int id, void *data, size_t size)
+static void show_efi_boot_opt_data(u16 *varname16, void *data, size_t size)
 {
 	struct efi_load_option lo;
 	char *label, *p;
@@ -705,8 +706,8 @@ static void show_efi_boot_opt_data(int id, void *data, size_t size)
 	p = label;
 	utf16_utf8_strncpy(&p, lo.label, label_len16);
 
-	printf("Boot%04X:\n", id);
+	printf("%ls:\nattributes: %c%c%c (0x%08x)\n",
-	printf("  attributes: %c%c%c (0x%08x)\n",
+	       varname16,
 	       /* ACTIVE */
 	       lo.attributes & LOAD_OPTION_ACTIVE ? 'A' : '-',
 	       /* FORCE RECONNECT */
@@ -730,37 +731,32 @@ static void show_efi_boot_opt_data(int id, void *data, size_t size)
 /**
  * show_efi_boot_opt() - dump UEFI load option
  *
- * @id:		Load option number
+ * @varname16:	variable name
  *
  * Dump information defined by UEFI load option.
  */
-static void show_efi_boot_opt(int id)
+static void show_efi_boot_opt(u16 *varname16)
 {
-	char var_name[9];
+	void *data;
-	u16 var_name16[9], *p;
-	efi_guid_t guid;
-	void *data = NULL;
 	efi_uintn_t size;
 	efi_status_t ret;
 
-	sprintf(var_name, "Boot%04X", id);
-	p = var_name16;
-	utf8_utf16_strncpy(&p, var_name, 9);
-	guid = efi_global_variable_guid;
-
 	size = 0;
-	ret = EFI_CALL(RT->get_variable(var_name16, &guid, NULL, &size, NULL));
+	ret = EFI_CALL(efi_get_variable(varname16, &efi_global_variable_guid,
+					NULL, &size, NULL));
 	if (ret == EFI_BUFFER_TOO_SMALL) {
 		data = malloc(size);
-		ret = EFI_CALL(RT->get_variable(var_name16, &guid, NULL, &size,
+		if (!data) {
-						data));
+			printf("ERROR: Out of memory\n");
+			return;
 		}
+		ret = EFI_CALL(efi_get_variable(varname16,
+						&efi_global_variable_guid,
+						NULL, &size, data));
 		if (ret == EFI_SUCCESS)
-		show_efi_boot_opt_data(id, data, size);
+			show_efi_boot_opt_data(varname16, data, size);
-	else if (ret == EFI_NOT_FOUND)
-		printf("Boot%04X: not found\n", id);
-
 		free(data);
+	}
 }
 
 static int u16_tohex(u16 c)
@@ -839,7 +835,7 @@ static int do_efi_boot_dump(cmd_tbl_t *cmdtp, int flag,
 			id = (id << 4) + digit;
 		}
 		if (i == 4 && !var_name16[8])
-			show_efi_boot_opt(id);
+			show_efi_boot_opt(var_name16);
 	}
 
 	free(var_name16);
@@ -856,8 +852,7 @@ static int do_efi_boot_dump(cmd_tbl_t *cmdtp, int flag,
  */
 static int show_efi_boot_order(void)
 {
-	efi_guid_t guid;
+	u16 *bootorder;
-	u16 *bootorder = NULL;
 	efi_uintn_t size;
 	int num, i;
 	char var_name[9];
@@ -868,20 +863,25 @@ static int show_efi_boot_order(void)
 	size_t label_len16, label_len;
 	efi_status_t ret;
 
-	guid = efi_global_variable_guid;
 	size = 0;
-	ret = EFI_CALL(RT->get_variable(L"BootOrder", &guid, NULL, &size,
+	ret = EFI_CALL(RT->get_variable(L"BootOrder", &efi_global_variable_guid,
-					NULL));
+					NULL, &size, NULL));
-	if (ret == EFI_BUFFER_TOO_SMALL) {
+	if (ret != EFI_BUFFER_TOO_SMALL) {
-		bootorder = malloc(size);
-		ret = EFI_CALL(RT->get_variable(L"BootOrder", &guid, NULL,
-						&size, bootorder));
-	}
 		if (ret == EFI_NOT_FOUND) {
 			printf("BootOrder not defined\n");
-		ret = CMD_RET_SUCCESS;
+			return CMD_RET_SUCCESS;
-		goto out;
+		} else {
-	} else if (ret != EFI_SUCCESS) {
+			return CMD_RET_FAILURE;
+		}
+	}
+	bootorder = malloc(size);
+	if (!bootorder) {
+		printf("ERROR: Out of memory\n");
+		return CMD_RET_FAILURE;
+	}
+	ret = EFI_CALL(efi_get_variable(L"BootOrder", &efi_global_variable_guid,
+					NULL, &size, bootorder));
+	if (ret != EFI_SUCCESS) {
 		ret = CMD_RET_FAILURE;
 		goto out;
 	}
@@ -893,11 +893,11 @@ static int show_efi_boot_order(void)
 		utf8_utf16_strncpy(&p16, var_name, 9);
 
 		size = 0;
-		ret = EFI_CALL(RT->get_variable(var_name16, &guid, NULL, &size,
+		ret = EFI_CALL(efi_get_variable(var_name16,
-						NULL));
+						&efi_global_variable_guid, NULL,
+						&size, NULL));
 		if (ret != EFI_BUFFER_TOO_SMALL) {
-			printf("%2d: Boot%04X: (not defined)\n",
+			printf("%2d: %s: (not defined)\n", i + 1, var_name);
-			       i + 1, bootorder[i]);
 			continue;
 		}
 
@@ -906,8 +906,9 @@ static int show_efi_boot_order(void)
 			ret = CMD_RET_FAILURE;
 			goto out;
 		}
-		ret = EFI_CALL(RT->get_variable(var_name16, &guid, NULL, &size,
+		ret = EFI_CALL(efi_get_variable(var_name16,
-						data));
+						&efi_global_variable_guid, NULL,
+						&size, data));
 		if (ret != EFI_SUCCESS) {
 			free(data);
 			ret = CMD_RET_FAILURE;
@@ -926,7 +927,7 @@ static int show_efi_boot_order(void)
 		}
 		p = label;
 		utf16_utf8_strncpy(&p, lo.label, label_len16);
-		printf("%2d: Boot%04X: %s\n", i + 1, bootorder[i], label);
+		printf("%2d: %s: %s\n", i + 1, var_name, label);
 		free(label);
 
 		free(data);

cmd/gpt.c

@@ -245,7 +245,7 @@ static void print_gpt_info(void)
 		printf("Block size %lu, name %s\n", curr->gpt_part_info.blksz,
 		       curr->gpt_part_info.name);
 		printf("Type %s, bootable %d\n", curr->gpt_part_info.type,
-		       curr->gpt_part_info.bootable);
+		       curr->gpt_part_info.bootable & PART_BOOTABLE);
 #ifdef CONFIG_PARTITION_UUIDS
 		printf("UUID %s\n", curr->gpt_part_info.uuid);
 #endif
@@ -535,7 +535,7 @@ static int set_gpt_info(struct blk_desc *dev_desc,
 
 		/* bootable */
 		if (found_key(tok, "bootable"))
-			parts[i].bootable = 1;
+			parts[i].bootable = PART_BOOTABLE;
 	}
 
 	*parts_count = p_count;

disk/part_dos.c

@@ -45,9 +45,15 @@ static inline int is_extended(int part_type)
 	    part_type == 0x85);
 }
 
-static inline int is_bootable(dos_partition_t *p)
+static int get_bootable(dos_partition_t *p)
 {
-	return (p->sys_ind == 0xef) || (p->boot_ind == 0x80);
+	int ret = 0;
+
+	if (p->sys_ind == 0xef)
+		ret |= PART_EFI_SYSTEM_PARTITION;
+	if (p->boot_ind == 0x80)
+		ret |= PART_BOOTABLE;
+	return ret;
 }
 
 static void print_one_part(dos_partition_t *p, lbaint_t ext_part_sector,
@@ -60,7 +66,7 @@ static void print_one_part(dos_partition_t *p, lbaint_t ext_part_sector,
 		"u\t%08x-%02x\t%02x%s%s\n",
 		part_num, lba_start, lba_size, disksig, part_num, p->sys_ind,
 		(is_extended(p->sys_ind) ? " Extd" : ""),
-		(is_bootable(p) ? " Boot" : ""));
+		(get_bootable(p) ? " Boot" : ""));
 }
 
 static int test_block_type(unsigned char *buffer)
@@ -258,7 +264,7 @@ static int part_get_info_extended(struct blk_desc *dev_desc,
 					      (char *)info->name);
 			/* sprintf(info->type, "%d, pt->sys_ind); */
 			strcpy((char *)info->type, "U-Boot");
-			info->bootable = is_bootable(pt);
+			info->bootable = get_bootable(pt);
 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
 			sprintf(info->uuid, "%08x-%02x", disksig, part_num);
 #endif

disk/part_efi.c

@@ -71,11 +71,15 @@ static char *print_efiname(gpt_entry *pte)
 
 static const efi_guid_t system_guid = PARTITION_SYSTEM_GUID;
 
-static inline int is_bootable(gpt_entry *p)
+static int get_bootable(gpt_entry *p)
 {
-	return p->attributes.fields.legacy_bios_bootable ||
+	int ret = 0;
-		!memcmp(&(p->partition_type_guid), &system_guid,
+
-			sizeof(efi_guid_t));
+	if (!memcmp(&p->partition_type_guid, &system_guid, sizeof(efi_guid_t)))
+		ret |=  PART_EFI_SYSTEM_PARTITION;
+	if (p->attributes.fields.legacy_bios_bootable)
+		ret |=  PART_BOOTABLE;
+	return ret;
 }
 
 static int validate_gpt_header(gpt_header *gpt_h, lbaint_t lba,
@@ -286,7 +290,7 @@ int part_get_info_efi(struct blk_desc *dev_desc, int part,
 	snprintf((char *)info->name, sizeof(info->name), "%s",
 		 print_efiname(&gpt_pte[part - 1]));
 	strcpy((char *)info->type, "U-Boot");
-	info->bootable = is_bootable(&gpt_pte[part - 1]);
+	info->bootable = get_bootable(&gpt_pte[part - 1]);
 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
 	uuid_bin_to_str(gpt_pte[part - 1].unique_partition_guid.b, info->uuid,
 			UUID_STR_FORMAT_GUID);
@@ -501,7 +505,7 @@ int gpt_fill_pte(struct blk_desc *dev_desc,
 		memset(&gpt_e[i].attributes, 0,
 		       sizeof(gpt_entry_attributes));
 
-		if (partitions[i].bootable)
+		if (partitions[i].bootable & PART_BOOTABLE)
 			gpt_e[i].attributes.fields.legacy_bios_bootable = 1;
 
 		/* partition name */

doc/uefi/uefi.rst

@@ -100,47 +100,57 @@ See doc/uImage.FIT/howto.txt for an introduction to FIT images.
 Configuring UEFI secure boot
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-UEFI specification[1] defines a secure way of executing UEFI images
+The UEFI specification[1] defines a secure way of executing UEFI images
 by verifying a signature (or message digest) of image with certificates.
 This feature on U-Boot is enabled with::
 
     CONFIG_UEFI_SECURE_BOOT=y
 
 To make the boot sequence safe, you need to establish a chain of trust;
-In UEFI secure boot, you can make it with the UEFI variables, "PK"
+In UEFI secure boot the chain trust is defined by the following UEFI variables
-(Platform Key), "KEK" (Key Exchange Keys), "db" (white list database)
-and "dbx" (black list database).
 
-There are many online documents that describe what UEFI secure boot is
+* PK - Platform Key
-and how it works. Please consult some of them for details.
+* KEK - Key Exchange Keys
+* db - white list database
+* dbx - black list database
 
-Here is a simple example that you can follow for your initial attempt
+An in depth description of UEFI secure boot is beyond the scope of this
-(Please note that the actual steps would absolutely depend on your system
+document. Please, refer to the UEFI specification and available online
-and environment.):
+documentation. Here is a simple example that you can follow for your initial
+attempt (Please note that the actual steps will depend on your system and
+environment.):
 
-1. Install utility commands on your host
+Install the required tools on your host
-    * openssl
-    * efitools
-    * sbsigntool
 
-2. Create signing keys and key database files on your host
+* openssl
-    for PK::
+* efitools
+* sbsigntool
 
-        $ openssl req -x509 -sha256 -newkey rsa:2048 -subj /CN=TEST_PK/ \
+Create signing keys and the key database on your host:
+
+The platform key
+
+.. code-block:: bash
+
+    openssl req -x509 -sha256 -newkey rsa:2048 -subj /CN=TEST_PK/ \
             -keyout PK.key -out PK.crt -nodes -days 365
-        $ cert-to-efi-sig-list -g 11111111-2222-3333-4444-123456789abc \
+    cert-to-efi-sig-list -g 11111111-2222-3333-4444-123456789abc \
             PK.crt PK.esl;
-        $ sign-efi-sig-list -c PK.crt -k PK.key PK PK.esl PK.auth
+    sign-efi-sig-list -c PK.crt -k PK.key PK PK.esl PK.auth
 
-    for KEK::
+The key exchange keys
 
-        $ openssl req -x509 -sha256 -newkey rsa:2048 -subj /CN=TEST_KEK/ \
+.. code-block:: bash
+
+    openssl req -x509 -sha256 -newkey rsa:2048 -subj /CN=TEST_KEK/ \
             -keyout KEK.key -out KEK.crt -nodes -days 365
-        $ cert-to-efi-sig-list -g 11111111-2222-3333-4444-123456789abc \
+    cert-to-efi-sig-list -g 11111111-2222-3333-4444-123456789abc \
             KEK.crt KEK.esl
-        $ sign-efi-sig-list -c PK.crt -k PK.key KEK KEK.esl KEK.auth
+    sign-efi-sig-list -c PK.crt -k PK.key KEK KEK.esl KEK.auth
 
-    for db::
+The whitelist database
+
+.. code-block:: bash
 
     $ openssl req -x509 -sha256 -newkey rsa:2048 -subj /CN=TEST_db/ \
             -keyout db.key -out db.crt -nodes -days 365
@@ -148,31 +158,35 @@ and environment.):
             db.crt db.esl
     $ sign-efi-sig-list -c KEK.crt -k KEK.key db db.esl db.auth
 
-    Copy \*.auth to media, say mmc, that is accessible from U-Boot.
+Copy the \*.auth files to media, say mmc, that is accessible from U-Boot.
 
-3. Sign an image with one key in "db" on your host::
+Sign an image with one of the keys in "db" on your host
 
-    $ sbsign --key db.key --cert db.crt helloworld.efi
+.. code-block:: bash
 
-4. Install keys on your board::
+    sbsign --key db.key --cert db.crt helloworld.efi
 
-    ==> fatload mmc 0:1 <tmpaddr> PK.auth
+Now in U-Boot install the keys on your board::
-    ==> setenv -e -nv -bs -rt -at -i <tmpaddr>,$filesize PK
-    ==> fatload mmc 0:1 <tmpaddr> KEK.auth
-    ==> setenv -e -nv -bs -rt -at -i <tmpaddr>,$filesize KEK
-    ==> fatload mmc 0:1 <tmpaddr> db.auth
-    ==> setenv -e -nv -bs -rt -at -i <tmpaddr>,$filesize db
 
-5. Set up boot parameters on your board::
+    fatload mmc 0:1 <tmpaddr> PK.auth
+    setenv -e -nv -bs -rt -at -i <tmpaddr>,$filesize PK
+    fatload mmc 0:1 <tmpaddr> KEK.auth
+    setenv -e -nv -bs -rt -at -i <tmpaddr>,$filesize KEK
+    fatload mmc 0:1 <tmpaddr> db.auth
+    setenv -e -nv -bs -rt -at -i <tmpaddr>,$filesize db
 
-    ==> efidebug boot add 1 HELLO mmc 0:1 /helloworld.efi.signed ""
+Set up boot parameters on your board::
 
-Then your board runs that image from Boot manager (See below).
+    efidebug boot add 1 HELLO mmc 0:1 /helloworld.efi.signed ""
+
+Now your board can run the signed image via the boot manager (see below).
 You can also try this sequence by running Pytest, test_efi_secboot,
-on sandbox::
+on the sandbox
 
-    $ cd <U-Boot source directory>
+.. code-block:: bash
-    $ pytest.py test/py/tests/test_efi_secboot/test_signed.py --bd sandbox
+
+    cd <U-Boot source directory>
+    pytest.py test/py/tests/test_efi_secboot/test_signed.py --bd sandbox
 
 Executing the boot manager
 ~~~~~~~~~~~~~~~~~~~~~~~~~~

include/efi_loader.h

@@ -11,6 +11,7 @@
 #include <common.h>
 #include <part_efi.h>
 #include <efi_api.h>
+#include <image.h>
 #include <pe.h>
 
 static inline int guidcmp(const void *g1, const void *g2)
@@ -47,6 +48,13 @@ static inline void *guidcpy(void *dst, const void *src)
 /* Root node */
 extern efi_handle_t efi_root;
 
+/* EFI system partition */
+extern struct efi_system_partition {
+	enum if_type if_type;
+	int devnum;
+	u8 part;
+} efi_system_partition;
+
 int __efi_entry_check(void);
 int __efi_exit_check(void);
 const char *__efi_nesting(void);
@@ -695,9 +703,6 @@ void efi_deserialize_load_option(struct efi_load_option *lo, u8 *data);
 unsigned long efi_serialize_load_option(struct efi_load_option *lo, u8 **data);
 efi_status_t efi_bootmgr_load(efi_handle_t *handle);
 
-#ifdef CONFIG_EFI_SECURE_BOOT
-#include <image.h>
-
 /**
  * efi_image_regions - A list of memory regions
  *
@@ -767,7 +772,6 @@ bool efi_secure_boot_enabled(void);
 
 bool efi_image_parse(void *efi, size_t len, struct efi_image_regions **regp,
 		     WIN_CERTIFICATE **auth, size_t *auth_len);
-#endif /* CONFIG_EFI_SECURE_BOOT */
 
 #else /* CONFIG_IS_ENABLED(EFI_LOADER) */
 

include/part.h

@@ -51,13 +51,22 @@ struct block_drvr {
 #define PART_TYPE_LEN 32
 #define MAX_SEARCH_PARTITIONS 64
 
+#define PART_BOOTABLE			((int)BIT(0))
+#define PART_EFI_SYSTEM_PARTITION	((int)BIT(1))
+
 typedef struct disk_partition {
 	lbaint_t	start;	/* # of first block in partition	*/
 	lbaint_t	size;	/* number of blocks in partition	*/
 	ulong	blksz;		/* block size in bytes			*/
 	uchar	name[PART_NAME_LEN];	/* partition name			*/
 	uchar	type[PART_TYPE_LEN];	/* string type description		*/
-	int	bootable;	/* Active/Bootable flag is set		*/
+	/*
+	 * The bootable is a bitmask with the following fields:
+	 *
+	 * PART_BOOTABLE		the MBR bootable flag is set
+	 * PART_EFI_SYSTEM_PARTITION	the partition is an EFI system partition
+	 */
+	int	bootable;
 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
 	char	uuid[UUID_STR_LEN + 1];	/* filesystem UUID as string, if exists	*/
 #endif

lib/efi_loader/efi_disk.c

@@ -13,6 +13,8 @@
 #include <part.h>
 #include <malloc.h>
 
+struct efi_system_partition efi_system_partition;
+
 const efi_guid_t efi_block_io_guid = EFI_BLOCK_IO_PROTOCOL_GUID;
 
 /**
@@ -418,6 +420,24 @@ static efi_status_t efi_disk_add_dev(
 	diskobj->ops.media = &diskobj->media;
 	if (disk)
 		*disk = diskobj;
+
+	/* Store first EFI system partition */
+	if (part && !efi_system_partition.if_type) {
+		int r;
+		disk_partition_t info;
+
+		r = part_get_info(desc, part, &info);
+		if (r)
+			return EFI_DEVICE_ERROR;
+		if (info.bootable & PART_EFI_SYSTEM_PARTITION) {
+			efi_system_partition.if_type = desc->if_type;
+			efi_system_partition.devnum = desc->devnum;
+			efi_system_partition.part = part;
+			EFI_PRINT("EFI system partition: %s %d:%d\n",
+				  blk_get_if_type_name(desc->if_type),
+				  desc->devnum, part);
+		}
+	}
 	return EFI_SUCCESS;
 }
 

test/py/tests/test_efi_secboot/conftest.py

@@ -43,7 +43,8 @@ def efi_boot_env(request, u_boot_config):
         HELLO_PATH = u_boot_config.build_dir + '/lib/efi_loader/helloworld.efi'
 
     try:
-        non_root = tool_is_in_path('udisksctl')
+        mnt_point = u_boot_config.persistent_data_dir + '/mnt_efisecure'
+        check_call('mkdir -p {}'.format(mnt_point), shell=True)
 
         # create a disk/partition
         check_call('dd if=/dev/zero of=%s bs=1MiB count=%d'
@@ -57,25 +58,11 @@ def efi_boot_env(request, u_boot_config):
         check_call('dd if=%s.tmp of=%s bs=1MiB seek=1 count=%d conv=notrunc'
                             % (image_path, image_path, 1), shell=True)
         check_call('rm %s.tmp' % image_path, shell=True)
-        if non_root:
-            out_data = check_output('udisksctl loop-setup -f %s -o %d'
-                                % (image_path, 1048576), shell=True).decode()
-            m = re.search('(?<= as )(.*)\.', out_data)
-            loop_dev = m.group(1)
-            # print 'loop device is: %s' % loop_dev
-            out_data = check_output('udisksctl info -b %s'
-                                % loop_dev, shell=True).decode()
-            m = re.search('MountPoints:[ \t]+(.*)', out_data)
-            mnt_point = m.group(1)
-        else:
         loop_dev = check_output('sudo losetup -o 1MiB --sizelimit %dMiB --show -f %s | tr -d "\n"'
                                 % (part_size, image_path), shell=True).decode()
-            mnt_point = '/mnt'
         check_output('sudo mount -t %s -o umask=000 %s %s'
                                 % (fs_type, loop_dev, mnt_point), shell=True)
 
-        # print 'mount point is: %s' % mnt_point
-
         # suffix
         # *.key: RSA private key in PEM
         # *.crt: X509 certificate (self-signed) in PEM
@@ -134,11 +121,6 @@ def efi_boot_env(request, u_boot_config):
                             % (mnt_point, EFITOOLS_PATH, EFITOOLS_PATH),
                             shell=True)
 
-        if non_root:
-            check_call('udisksctl unmount -b %s' % loop_dev, shell=True)
-            # not needed
-            # check_call('udisksctl loop-delete -b %s' % loop_dev, shell=True)
-        else:
         check_call('sudo umount %s' % loop_dev, shell=True)
         check_call('sudo losetup -d %s' % loop_dev, shell=True)