From: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Date: Sat, 9 Dec 2023 17:05:36 +0000 (+0100)
Subject: cmd: check argc for acpi dump
X-Git-Url: http://git.dujemihanovic.xyz/%22http:/www.sics.se/static/git-logo.png?a=commitdiff_plain;h=aafbe1daa5b108635c6c20ae9f3b83db358e1827;p=u-boot.git

cmd: check argc for acpi dump

'acpi dump' without parameter results in a NULL dereference. Check the
number of arguments.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
---

diff --git a/cmd/acpi.c b/cmd/acpi.c
index 89970417a0..0c14409242 100644
--- a/cmd/acpi.c
+++ b/cmd/acpi.c
@@ -160,6 +160,9 @@ static int do_acpi_dump(struct cmd_tbl *cmdtp, int flag, int argc,
 	char sig[ACPI_NAME_LEN];
 	int ret;
 
+	if (argc < 2)
+		return CMD_RET_USAGE;
+
 	name = argv[1];
 	if (strlen(name) != ACPI_NAME_LEN) {
 		printf("Table name '%s' must be four characters\n", name);