From: Zhangfei Gao <zhangfei.gao@linaro.org>
To: Eric Biggers <ebiggers@kernel.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jonathan Cameron <Jonathan.Cameron@huawei.com>,
wangzhou1 <wangzhou1@hisilicon.com>,
linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org,
kbuild-all@lists.01.org
Subject: Re: [PATCH] crypto: hisilicon - fix strncpy warning with strlcpy
Date: Sat, 6 Jun 2020 09:42:50 +0800 [thread overview]
Message-ID: <e17e20cf-c62b-e4a6-4acc-e08e1c655c90@linaro.org> (raw)
In-Reply-To: <20200605154902.GA1373@sol.localdomain>
On 2020/6/5 下午11:49, Eric Biggers wrote:
> On Fri, Jun 05, 2020 at 11:26:20PM +0800, Zhangfei Gao wrote:
>>
>> On 2020/6/5 下午8:17, Herbert Xu wrote:
>>> On Fri, Jun 05, 2020 at 05:34:32PM +0800, Zhangfei Gao wrote:
>>>> Will add a check after the copy.
>>>>
>>>> strlcpy(interface.name, pdev->driver->name, sizeof(interface.name));
>>>> if (strlen(pdev->driver->name) != strlen(interface.name))
>>>> return -EINVAL;
>>> You don't need to do strlen. The function strlcpy returns the
>>> length of the source string.
>>>
>>> Better yet use strscpy which will even return an error for you.
>>>
>>>
>> Yes, good idea, we can use strscpy.
>>
>> + int ret;
>>
>> - strncpy(interface.name, pdev->driver->name, sizeof(interface.name));
>> + ret = strscpy(interface.name, pdev->driver->name,
>> sizeof(interface.name));
>> + if (ret < 0)
>> + return ret;
> You might want to use -ENAMETOOLONG instead of the strscpy return value of
> -E2BIG.
Yes, make sense, thanks Eric
next prev parent reply other threads:[~2020-06-06 1:43 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <202006032110.BEbKqovX%lkp@intel.com>
2020-06-04 3:32 ` [PATCH] crypto: hisilicon - fix strncpy warning with strlcpy Zhangfei Gao
2020-06-04 3:39 ` Herbert Xu
2020-06-04 6:10 ` Zhangfei Gao
2020-06-04 6:18 ` Herbert Xu
2020-06-04 6:44 ` Zhangfei Gao
2020-06-04 6:50 ` Herbert Xu
2020-06-04 13:52 ` Zhou Wang
2020-06-05 9:34 ` Zhangfei Gao
2020-06-05 12:17 ` Herbert Xu
2020-06-05 15:26 ` Zhangfei Gao
2020-06-05 15:49 ` Eric Biggers
2020-06-06 1:42 ` Zhangfei Gao [this message]
2020-06-07 13:03 ` David Laight
2020-06-10 6:56 ` Eric Biggers
2020-06-15 3:38 ` [PATCH v2] crypto: hisilicon - fix strncpy warning with strscpy Zhangfei Gao
2020-06-26 6:06 ` Herbert Xu
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