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cmd: check argc for acpi dump

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'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>
This commit is contained in:
Heinrich Schuchardt 2023-12-09 18:05:36 +01:00 committed by Tom Rini
parent eb09c33084
commit aafbe1daa5
1 changed files with 3 additions and 0 deletions
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3
cmd/acpi.c
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@ -160,6 +160,9 @@ static int do_acpi_dump(struct cmd_tbl *cmdtp, int flag, int argc,
char sig[ACPI_NAME_LEN]; char sig[ACPI_NAME_LEN];
int ret; int ret;
if (argc < 2)
return CMD_RET_USAGE;
name = argv[1]; name = argv[1];
if (strlen(name) != ACPI_NAME_LEN) { if (strlen(name) != ACPI_NAME_LEN) {
printf("Table name '%s' must be four characters\n", name); printf("Table name '%s' must be four characters\n", name);