linux-kernel - Re: [PATCH] scsi: mpt2sas: mpt2sas_base.c: Cleaning up missing null-terminate after strncpy call

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Message-ID: <CAFo99gaC_D=RbvTRbkSCsxUF7AWpbENEt63+gisdi5z=YL_t+Q@mail.gmail.com>
Date:	Thu, 5 Jun 2014 00:25:49 +0200
From:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
To:	Joe Perches <joe@...ches.com>
Cc:	Nagalakshmi Nandigama <Nagalakshmi.Nandigama@....com>,
	Sreekanth Reddy <Sreekanth.Reddy@....com>, support@....com,
	"James E.J. Bottomley" <JBottomley@...allels.com>,
	DL-MPTFusionLinux@....com, linux-scsi@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] scsi: mpt2sas: mpt2sas_base.c: Cleaning up missing
 null-terminate after strncpy call

Hi

A little embarrassing, but I actually did not know that there was a
better replacement for strncpy.

Sorry, but I will send a new platch based on strlcpy instead then.

Will investigate cover letter then to.


Best regards
Rickard Strandqvist


2014-06-05 0:01 GMT+02:00 Joe Perches <joe@...ches.com>:
> On Wed, 2014-06-04 at 23:36 +0200, Rickard Strandqvist wrote:
>> Added a guaranteed null-terminate after call to strncpy.
>
> Next time you submit a patch series like this
> can you please use a cover letter?
>
> That way I can reply to the cover letter with
> a comment about the series instead of multiple
> replies to various patches.
>
> I think all of these should be using strlcpy not
> strncpy.
>
>> diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.c b/drivers/scsi/mpt2sas/mpt2sas_base.c
> []
>> @@ -2097,7 +2097,8 @@ _base_display_ioc_capabilities(struct MPT2SAS_ADAPTER *ioc)
>>       u32 bios_version;
>>
>>       bios_version = le32_to_cpu(ioc->bios_pg3.BiosVersion);
>> -     strncpy(desc, ioc->manu_pg0.ChipName, 16);
>> +     strncpy(desc, ioc->manu_pg0.ChipName, sizeof(desc));
>> +     desc[sizeof(desc) - 1] = '\0';
>
>
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