linux-kernel - Re: [patch v2 2/3] staging: speakup: check and convert dev name or ser to dev

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Message-ID: <20170619053921.GA389@sanghar>
Date:   Mon, 19 Jun 2017 06:39:21 +0100
From:   Okash Khawaja <okash.khawaja@...il.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Jiri Slaby <jslaby@...e.com>,
        Samuel Thibault <samuel.thibault@...-lyon.org>,
        linux-kernel@...r.kernel.org, devel@...verdev.osuosl.org,
        Kirk Reiser <kirk@...sers.ca>, speakup@...ux-speakup.org,
        Chris Brannon <chris@...-brannons.com>
Subject: Re: [patch v2 2/3] staging: speakup: check and convert dev name or
 ser to dev_t

On Mon, Jun 19, 2017 at 09:15:33AM +0800, Greg Kroah-Hartman wrote:
> > +int ser_to_dev(int ser, dev_t *dev_no)
> > +{
> > +	if (ser < 0 || ser > (255 - 64)) {
> > +                pr_err("speakup: Invalid ser param. \
> > +				Must be between 0 and 191 inclusive.\n");
> 
> As Andy pointed out, never do this for a C string, it's not doing what
> you think it is :)
Of course! I am sorry I should address such issues before submitting.
Will watch out more carefully next time.

> 
> Worse case, do this like the following:
> 		pr_err("speakup: Invalid ser param."
> 			"Must be between 0 and 191 inclusive.\n");
> 
> Also note, you are using spaces here in the patch, always run
> checkpatch.pl on your patches, so you don't get a grumpy maintainer
> telling you to run checkpatch.pl on your patches :)
Sure.

Thanks for the patience.

Okash