linux-hardening - Re: [PATCH] net: usb: replace deprecated strncpy with strscpy

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Message-ID: <db6662e2-ef0a-4a16-880e-bf58520c1a8a@lunn.ch>
Date: Sat, 14 Oct 2023 18:33:48 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Justin Stitt <justinstitt@...gle.com>
Cc: "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	linux-usb@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH] net: usb: replace deprecated strncpy with strscpy

On Thu, Oct 12, 2023 at 10:33:34PM +0000, Justin Stitt wrote:
> strncpy() is deprecated for use on NUL-terminated destination strings
> [1] and as such we should prefer more robust and less ambiguous string
> interfaces.
> 
> Other implementations of .*get_drvinfo use strscpy so this patch brings
> sr_get_drvinfo() in line as well:
> 
> igb/igb_ethtool.c +851
> static void igb_get_drvinfo(struct net_device *netdev,
> 
> igbvf/ethtool.c
> 167:static void igbvf_get_drvinfo(struct net_device *netdev,
> 
> i40e/i40e_ethtool.c
> 1999:static void i40e_get_drvinfo(struct net_device *netdev,
> 
> e1000/e1000_ethtool.c
> 529:static void e1000_get_drvinfo(struct net_device *netdev,
> 
> ixgbevf/ethtool.c
> 211:static void ixgbevf_get_drvinfo(struct net_device *netdev,
> 
> ...
> 
> Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings [1]
> Link: https://manpages.debian.org/testing/linux-manual-4.8/strscpy.9.en.html [2]
> Link: https://github.com/KSPP/linux/issues/90
> Cc: linux-hardening@...r.kernel.org
> Signed-off-by: Justin Stitt <justinstitt@...gle.com>

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew