netdev - Re: [PATCH net-next v2] drivers: net: sky2: Fix -Wstringop-truncation with W=1

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Message-ID: <20201109220616.7c3ecf02@hermes.local>
Date:   Mon, 9 Nov 2020 22:06:16 -0800
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Jakub Kicinski <kuba@...nel.org>, netdev <netdev@...r.kernel.org>,
        Mirko Lindner <mlindner@...vell.com>
Subject: Re: [PATCH net-next v2] drivers: net: sky2: Fix
 -Wstringop-truncation with W=1

On Tue, 10 Nov 2020 03:32:22 +0100
Andrew Lunn <andrew@...n.ch> wrote:

> In function ‘strncpy’,
>     inlined from ‘sky2_name’ at drivers/net/ethernet/marvell/sky2.c:4903:3,
>     inlined from ‘sky2_probe’ at drivers/net/ethernet/marvell/sky2.c:5049:2:
> ./include/linux/string.h:297:30: warning: ‘__builtin_strncpy’ specified bound 16 equals destination size [-Wstringop-truncation]
> 
> None of the device names are 16 characters long, so it was never an
> issue. But replace the strncpy with an snprintf() to prevent the
> theoretical overflow.
> 
> Suggested-by: Stephen Hemminger <stephen@...workplumber.org>
> Signed-off-by: Andrew Lunn <andrew@...n.ch>

Acked-by: Stephen Hemminger <stephen@...workplumber.org>