linux-kernel - Re: [PATCH v2 1/2] crypto: caam - fix pkcs1pad(rsa-caam, sha256) failure because of invalid input

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Message-ID: <VI1PR04MB44452D9C82BB8835DDF759298C010@VI1PR04MB4445.eurprd04.prod.outlook.com>
Date:   Thu, 23 May 2019 08:08:50 +0000
From:   Iuliana Prodan <iuliana.prodan@....com>
To:     Herbert Xu <herbert@...dor.apana.org.au>
CC:     Horia Geanta <horia.geanta@....com>,
        Aymen Sghaier <aymen.sghaier@....com>,
        "David S. Miller" <davem@...emloft.net>,
        "linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        dl-linux-imx <linux-imx@....com>
Subject: Re: [PATCH v2 1/2] crypto: caam - fix pkcs1pad(rsa-caam, sha256)
 failure because of invalid input

On 5/23/2019 9:12 AM, Herbert Xu wrote:
> On Wed, May 15, 2019 at 02:25:45PM +0300, Iuliana Prodan wrote:
>>
>> @@ -1058,6 +1105,14 @@ static int __init caam_pkc_init(void)
>>   		goto out_put_dev;
>>   	}
>>   
>> +	/* allocate zero buffer, used for padding input */
>> +	zero_buffer = kzalloc(CAAM_RSA_MAX_INPUT_SIZE - 1, GFP_DMA |
>> +			      GFP_KERNEL);
>> +	if (!zero_buffer) {
>> +		err = -ENOMEM;
>> +		goto out_put_dev;
>> +	}
>> +
>>   	err = crypto_register_akcipher(&caam_rsa);
>>   	if (err)
>>   		dev_warn(ctrldev, "%s alg registration failed\n",
> 
> This patch does not apply on top of the caam patch-series from Horia.
> You're also going to leak zero_buffer if crypto_register_akcipher
> fails.
> 
> Cheers,
> 

I'll fix the conflicts and also the leak of zero_buffer if 
crypto_register_akcipher fails and send a new version.

Regards,
Iulia