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From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Kees Cook <keescook@chromium.org>
Cc: "Jonathan Cameron" <jic23@kernel.org>,
	"Lars-Peter Clausen" <lars@metafoo.de>,
	"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
	"Nuno Sá" <nuno.sa@analog.com>,
	linux-iio@vger.kernel.org,
	"Nathan Chancellor" <nathan@kernel.org>,
	"Nick Desaulniers" <ndesaulniers@google.com>,
	"Bill Wendling" <morbo@google.com>,
	"Justin Stitt" <justinstitt@google.com>,
	llvm@lists.linux.dev, "Tomislav Denis" <tomislav.denis@avl.com>,
	linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org
Subject: Re: [PATCH v2] iio: pressure: dlhl60d: Initialize empty DLH bytes
Date: Fri, 23 Feb 2024 19:49:10 +0200	[thread overview]
Message-ID: <ZdjallR88R5KkATw@smile.fi.intel.com> (raw)
In-Reply-To: <ZdjaOLVd1yxNXhsp@smile.fi.intel.com>

On Fri, Feb 23, 2024 at 07:47:36PM +0200, Andy Shevchenko wrote:
> On Fri, Feb 23, 2024 at 09:29:39AM -0800, Kees Cook wrote:
> > 3 bytes were being read but 4 were being written. Explicitly initialize
> > the unused bytes to 0 and refactor the loop to use direct array
> > indexing, which appears to silence a Clang false positive warning[1].

...

> >  	for_each_set_bit(chn, indio_dev->active_scan_mask,
> > -		indio_dev->masklength) {
> > -		memcpy(tmp_buf + i,
> > +			 indio_dev->masklength) {
> > +		memcpy(&tmp_buf[i++],
> >  			&st->rx_buf[1] + chn * DLH_NUM_DATA_BYTES,
> >  			DLH_NUM_DATA_BYTES);
> > -		i++;
> >  	}
> 
> Not that I'm against the changes, but they (in accordance with the commit
> message) are irrelevant to this fix. I prefer fixes to be more focused on
> the real issues.

Ah, sorry, there are two changes here:
- indentation (which is indeed irrelevant)
- and indexing, which seems the needed one.

Whatever,
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

-- 
With Best Regards,
Andy Shevchenko



  reply	other threads:[~2024-02-23 17:49 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-02-23 17:29 [PATCH v2] iio: pressure: dlhl60d: Initialize empty DLH bytes Kees Cook
2024-02-23 17:47 ` Andy Shevchenko
2024-02-23 17:49   ` Andy Shevchenko [this message]
2024-02-23 17:50   ` Kees Cook
2024-02-25 12:14     ` Jonathan Cameron

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