As pointed out be Kees Cook if we return -EIO because the
obj->type != ACPI_TYPE_BUFFER, then we must kfree the
output buffer before the return.
Fixes:
1a258e670434 ("platform/x86: dell-smbios-wmi: Add new WMI dispatcher driver")
Reported-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20210826140822.71198-1-hdegoede@redhat.com
if (obj->type == ACPI_TYPE_INTEGER)
dev_dbg(&wdev->dev, "SMBIOS call failed: %llu\n",
obj->integer.value);
+ kfree(output.pointer);
return -EIO;
}
memcpy(input.pointer, obj->buffer.pointer, obj->buffer.length);