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

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Date:	Wed, 04 Jun 2014 15:01:23 -0700
From:	Joe Perches <joe@...ches.com>
To:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
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
Subject: Re: [PATCH] scsi: mpt2sas: mpt2sas_base.c:  Cleaning up missing
 null-terminate after strncpy call

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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