linux-kernel - Re: [PATCH v6 3/4] ipmi: ssif_bmc: Return -EFAULT if copy_from

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Date:   Thu, 17 Mar 2022 11:38:46 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Quan Nguyen <quan@...amperecomputing.com>
Cc:     Wolfram Sang <wsa@...nel.org>, Corey Minyard <minyard@....org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Joel Stanley <joel@....id.au>,
        Andrew Jeffery <andrew@...id.au>,
        Brendan Higgins <brendanhiggins@...gle.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        openipmi-developer@...ts.sourceforge.net,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-aspeed@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        linux-i2c@...r.kernel.org, openbmc@...ts.ozlabs.org,
        Open Source Submission <patches@...erecomputing.com>,
        Phong Vo <phong@...amperecomputing.com>,
        "Thang Q . Nguyen" <thang@...amperecomputing.com>
Subject: Re: [PATCH v6 3/4] ipmi: ssif_bmc: Return -EFAULT if
 copy_from_user() fails

On Thu, Mar 17, 2022 at 02:45:19PM +0700, Quan Nguyen wrote:
> Added Dan as I have missed Dan's email address in the first place.
> My apologize,
> - Quan
> 
> On 11/03/2022 13:58, Wolfram Sang wrote:
> > On Thu, Mar 10, 2022 at 06:41:18PM +0700, Quan Nguyen wrote:
> > > From: Dan Carpenter <dan.carpenter@...cle.com>
> > > 
> > > The copy_from_user() function returns the number of bytes remaining to
> > > be copied but we should return -EFAULT here.
> > > 
> > > Fixes: 501c25b59508 ("ipmi: ssif_bmc: Add SSIF BMC driver")
> > > Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
> > > Signed-off-by: Corey Minyard <cminyard@...sta.com>
> > > Signed-off-by: Quan Nguyen <quan@...amperecomputing.com>
> > 
> > It is nice that you want to keep this patch seperate to give Dan
> > credits, but I still think it should be merged into patch 1, so the
> > initial driver is as flawless as it can be. You could give Dan still
> > credits by mentioning him in the commit message IMO. Dan, would you be
> > fine with this?

Yes, that's no problem.  Thanks!

regards,
dan carpenter