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charset="utf-8" key might contain private part of the key, so better use kfree_sensitive to free it. Signed-off-by: Wang Ming --- drivers/platform/x86/think-lmi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/platform/x86/think-lmi.c b/drivers/platform/x86/think-= lmi.c index 52d1ce8dfe44..79346881cadb 100644 --- a/drivers/platform/x86/think-lmi.c +++ b/drivers/platform/x86/think-lmi.c @@ -719,12 +719,12 @@ static ssize_t cert_to_password_store(struct kobject = *kobj, /* Format: 'Password,Signature' */ auth_str =3D kasprintf(GFP_KERNEL, "%s,%s", passwd, setting->signature); if (!auth_str) { - kfree(passwd); + kfree_sensitive(passwd); return -ENOMEM; } ret =3D tlmi_simple_call(LENOVO_CERT_TO_PASSWORD_GUID, auth_str); kfree(auth_str); - kfree(passwd); + kfree_sensitive(passwd); =20 return ret ?: count; } --=20 2.25.1