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Message-ID: <CAFhGd8pmq3UKBE_6ZbLyvRRhXJzaWMQ2GfosvcEEeAS-n7M4aQ@mail.gmail.com>
Date: Fri, 13 Oct 2023 12:53:53 -0700
From: Justin Stitt <justinstitt@...gle.com>
To: Andrew Lunn <andrew@...n.ch>
Cc: Heiner Kallweit <hkallweit1@...il.com>,
Russell King <linux@...linux.org.uk>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH] net: phy: tja11xx: replace deprecated strncpy with ethtool_sprintf
On Fri, Oct 13, 2023 at 5:22 AM Andrew Lunn <andrew@...n.ch> wrote:
>
> > - for (i = 0; i < ARRAY_SIZE(tja11xx_hw_stats); i++) {
> > - strncpy(data + i * ETH_GSTRING_LEN,
> > - tja11xx_hw_stats[i].string, ETH_GSTRING_LEN);
> > - }
> > + for (i = 0; i < ARRAY_SIZE(tja11xx_hw_stats); i++)
> > + ethtool_sprintf(&data, "%s", tja11xx_hw_stats[i].string);
> > }
>
> I assume you are using "%s" because tja11xx_hw_stats[i].string cannot
> be trusted as a format string? Is this indicating we need an
> ethtool_puts() ?
Indeed, it would trigger a -Wformat-security warning.
An ethtool_puts() would be useful for this situation.
>
> Andrew
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