linux-kernel - Re: [PATCH] ima: drop vla in ima_audit

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Message-ID: <CAHp75VfoiQ_PxBph8JnNzun4y5Z-9z_rUcjGyM7A2CAwynddeA@mail.gmail.com>
Date:   Thu, 8 Mar 2018 19:47:37 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Tycho Andersen <tycho@...ho.ws>
Cc:     Mimi Zohar <zohar@...ux.vnet.ibm.com>,
        Dmitry Kasatkin <dmitry.kasatkin@...il.com>,
        linux-integrity@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        kernel-hardening@...ts.openwall.com
Subject: Re: [PATCH] ima: drop vla in ima_audit_measurement()

On Thu, Mar 8, 2018 at 7:14 PM, Tycho Andersen <tycho@...ho.ws> wrote:
> In keeping with the directive to get rid of VLAs [1], let's drop the VLA
> from ima_audit_measurement(). We need to adjust the return type of
> ima_audit_measurement, because now this function can fail if an allocation
> fails.



> +       algo_hash_len = hash_len + strlen(algo_name) + 2;
> +       algo_hash = kzalloc(algo_hash_len, GFP_KERNEL);

> -       snprintf(algo_hash, sizeof(algo_hash), "%s:%s", algo_name, hash);
> +       snprintf(algo_hash, algo_hash_len, "%s:%s", algo_name, hash);

kasprintf() ?

-- 
With Best Regards,
Andy Shevchenko