cmd: fdt: Check argc before accessing argv in fdt bootcpu
On case 'fdt bootcpu' is invoked without parameters, argv[2] is not
valid and this command would SEGFAULT in sandbox environment. Add
missing argc test to avoid the crash and rather print usage help
message.
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/cmd/fdt.c b/cmd/fdt.c
index 29d7488..734c9b3 100644
--- a/cmd/fdt.c
+++ b/cmd/fdt.c
@@ -597,7 +597,12 @@
* Set boot cpu id
*/
} else if (strncmp(argv[1], "boo", 3) == 0) {
- unsigned long tmp = hextoul(argv[2], NULL);
+ unsigned long tmp;
+
+ if (argc != 3)
+ return CMD_RET_USAGE;
+
+ tmp = hextoul(argv[2], NULL);
fdt_set_boot_cpuid_phys(working_fdt, tmp);
/*