linux-kernel - Re: [PATCH] w1: Use kfree_sensitive to clear sensitive information

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Message-ID: <Y82Tl92T7k7LoyJa@ubun2204.myguest.virtualbox.org>
Date:   Mon, 23 Jan 2023 01:20:47 +0530
From:   Deepak R Varma <drv@...lo.com>
To:     Evgeniy Polyakov <zbr@...emap.net>, linux-kernel@...r.kernel.org
Cc:     Saurabh Singh Sengar <ssengar@...rosoft.com>,
        Praveen Kumar <kumarpraveen@...ux.microsoft.com>
Subject: Re: [PATCH] w1: Use kfree_sensitive to clear sensitive information

On Sun, Jan 08, 2023 at 01:41:18AM +0530, Deepak R Varma wrote:
> On Fri, Dec 23, 2022 at 04:09:22AM +0530, Deepak R Varma wrote:
> > Replace combination of 'memset(0) + kfree()' by kfree_sensitive() as it
> > prevents compiler from optimizing away from zeroing out memory at the
> > end of a scope. kfree_sensitive() is also safe in case the memory
> > pointer turns out to be null, which simply gets ignored.
> >
> > Issue identified using kfree_sensitive.cocci coccinelle semantic patch.
> >
> > Signed-off-by: Deepak R Varma <drv@...lo.com>
> > ---
> 
> Hello,
> Requesting a review and feedback on this patch proposal.

Hello,
Requesting a review and feedback on this patch proposal please.

Thank you,
./drv

> 
> Thank you,
> ./drv