linux-kernel - Re: [PATCH] crypto: hisilicon/hpre - fix unmapping invalid dma address

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Date:   Mon, 19 Apr 2021 19:50:17 +0800
From:   Hui Tang <tanghui20@...wei.com>
To:     Herbert Xu <herbert@...dor.apana.org.au>
CC:     <davem@...emloft.net>, <linux-crypto@...r.kernel.org>,
        <xuzaibo@...wei.com>, <wangzhou1@...ilicon.com>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] crypto: hisilicon/hpre - fix unmapping invalid dma
 address



On 2021/4/16 19:26, Herbert Xu wrote:
> On Sat, Apr 10, 2021 at 05:49:17PM +0800, Hui Tang wrote:
>> Currently, an invalid dma address may be unmapped when calling
>> 'xx_data_clr_all' in error path, so check dma address of sqe in/out
>> whether it has been mapped before calling 'dma_free_coherent' or
>> 'dma_unmap_single'.
>>
>> An abnormal case is as follows:
>> hpre_curve25519_compute_value
>> 	-> hpre_curve25519_src_init
>> 	-> hpre_curve25519_hw_data_clr_all
>>
>> Fixes: a9214b0b6ed2(crypto: hisilicon - fix the check on dma address)
>> Signed-off-by: Hui Tang <tanghui20@...wei.com>
>> ---
>>  drivers/crypto/hisilicon/hpre/hpre_crypto.c | 18 ++++++++++++++++++
>>  1 file changed, 18 insertions(+)
>
> This triggers new sparse warnings.

Thanks, I will fix it in 5.13 rc1.