Merge branch '2019-07-17-master-imports'

- Various FS/disk related fixes with security implications.
- Proper fix for the pci_ep test.
- Assorted bugfixes
- Some MediaTek updates.
- 'env erase' support.

3 files changed, 87 insertions, 0 deletions

diff --git a/cmd/Kconfig b/cmd/Kconfig
index 67284d8a5f6..175c6ad9e33 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -408,6 +408,14 @@ config CMD_SAVEENV
 	  Save all environment variables into the compiled-in persistent
 	  storage.
 
+config CMD_ERASEENV
+	bool "eraseenv"
+	default n
+	depends on CMD_SAVEENV
+	help
+	  Erase environment variables from the compiled-in persistent
+	  storage.
+
 config CMD_ENV_EXISTS
 	bool "env exists"
 	default y
@@ -563,6 +571,13 @@ config CMD_MEMORY
 	    base - print or set address offset
 	    loop - initialize loop on address range
 
+config CMD_RANDOM
+	bool "random"
+	default y
+	depends on CMD_MEMORY && (LIB_RAND || LIB_HW_RAND)
+	help
+	  random - fill memory with random data
+
 config CMD_MEMTEST
 	bool "memtest"
 	help
diff --git a/cmd/mem.c b/cmd/mem.c
index 392ed1756b6..c6b8038fc9d 100644
--- a/cmd/mem.c
+++ b/cmd/mem.c
@@ -1082,6 +1082,49 @@ static int do_mem_crc(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 
 #endif
 
+#ifdef CONFIG_CMD_RANDOM
+static int do_random(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	unsigned long addr, len;
+	unsigned long seed; // NOT INITIALIZED ON PURPOSE
+	unsigned int *buf, *start;
+	unsigned char *buf8;
+	unsigned int i;
+
+	if (argc < 3 || argc > 4) {
+		printf("usage: %s <addr> <len> [<seed>]\n", argv[0]);
+		return 0;
+	}
+
+	len = simple_strtoul(argv[2], NULL, 16);
+	addr = simple_strtoul(argv[1], NULL, 16);
+
+	if (argc == 4) {
+		seed = simple_strtoul(argv[3], NULL, 16);
+		if (seed == 0) {
+			printf("The seed cannot be 0. Using 0xDEADBEEF.\n");
+			seed = 0xDEADBEEF;
+		}
+	} else {
+		seed = get_timer(0) ^ rand();
+	}
+
+	srand(seed);
+	start = map_sysmem(addr, len);
+	buf = start;
+	for (i = 0; i < (len / 4); i++)
+		*buf++ = rand();
+
+	buf8 = (unsigned char *)buf;
+	for (i = 0; i < (len % 4); i++)
+		*buf8++ = rand() & 0xFF;
+
+	unmap_sysmem(start);
+	printf("%lu bytes filled with random data\n", len);
+	return 1;
+}
+#endif
+
 /**************************************************/
 U_BOOT_CMD(
 	md,	3,	1,	do_mem_md,
@@ -1250,3 +1293,12 @@ U_BOOT_CMD(
 	""
 );
 #endif
+
+#ifdef CONFIG_CMD_RANDOM
+U_BOOT_CMD(
+	random,	4,	0,	do_random,
+	"fill memory with random pattern",
+	"<addr> <len> [<seed>]\n"
+	"   - Fill 'len' bytes of memory starting at 'addr' with random data\n"
+);
+#endif
diff --git a/cmd/nvedit.c b/cmd/nvedit.c
index 7e468ab39d6..46b1e60f0ad 100644
--- a/cmd/nvedit.c
+++ b/cmd/nvedit.c
@@ -767,6 +767,20 @@ U_BOOT_CMD(
 	"save environment variables to persistent storage",
 	""
 );
+
+#if defined(CONFIG_CMD_ERASEENV)
+static int do_env_erase(cmd_tbl_t *cmdtp, int flag, int argc,
+			char * const argv[])
+{
+	return env_erase() ? 1 : 0;
+}
+
+U_BOOT_CMD(
+	eraseenv, 1, 0,	do_env_erase,
+	"erase environment variables from persistent storage",
+	""
+);
+#endif
 #endif
 #endif /* CONFIG_SPL_BUILD */
 
@@ -1316,6 +1330,9 @@ static cmd_tbl_t cmd_env_sub[] = {
 #endif
 #if defined(CONFIG_CMD_SAVEENV) && defined(ENV_IS_IN_DEVICE)
 	U_BOOT_CMD_MKENT(save, 1, 0, do_env_save, "", ""),
+#if defined(CONFIG_CMD_ERASEENV)
+	U_BOOT_CMD_MKENT(erase, 1, 0, do_env_erase, "", ""),
+#endif
 #endif
 	U_BOOT_CMD_MKENT(set, CONFIG_SYS_MAXARGS, 0, do_env_set, "", ""),
 #if defined(CONFIG_CMD_ENV_EXISTS)
@@ -1396,6 +1413,9 @@ static char env_help_text[] =
 #endif
 #if defined(CONFIG_CMD_SAVEENV) && defined(ENV_IS_IN_DEVICE)
 	"env save - save environment\n"
+#if defined(CONFIG_CMD_ERASEENV)
+	"env erase - erase environment\n"
+#endif
 #endif
 #if defined(CONFIG_CMD_NVEDIT_EFI)
 	"env set -e name [arg ...] - set UEFI variable; unset if 'arg' not specified\n"