linux-kernel - Re: [PATCH net 4/4] net: dsa: mv88e6xxx: Utilize strncpy() for ethtool::get

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Message-ID: <20180302030804.GB12656@lunn.ch>
Date:   Fri, 2 Mar 2018 04:08:04 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     netdev@...r.kernel.org,
        Vivien Didelot <vivien.didelot@...oirfairelinux.com>,
        Woojung Huh <Woojung.Huh@...rochip.com>,
        Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net 4/4] net: dsa: mv88e6xxx: Utilize strncpy() for
 ethtool::get_strings

On Thu, Mar 01, 2018 at 04:25:29PM -0800, Florian Fainelli wrote:
> Do not use memcpy() which is not safe, but instead use strncpy() which
> will make sure that the string is NUL terminated (in the Linux
> implementation) if the string is smaller than the length specified. This
> fixes KASAN out of bounds warnings while fetching port statistics.
> 
> Fixes: f5e2ed022dff ("dsa: mv88e6xxx: Add Second back of statistics")

I'm sure it goes back much further than that.

> Signed-off-by: Florian Fainelli <f.fainelli@...il.com>

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

    Andrew