netdev - Re: [PATCH] net: macb: Truncate TX1519CNT for trailing NUL

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Message-ID: <Z8/l8eM5u7QeUROt@mev-dev.igk.intel.com>
Date: Tue, 11 Mar 2025 08:27:45 +0100
From: Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>
To: Kees Cook <kees@...nel.org>
Cc: Nicolas Ferre <nicolas.ferre@...rochip.com>,
	Claudiu Beznea <claudiu.beznea@...on.dev>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"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: macb: Truncate TX1519CNT for trailing NUL

On Mon, Mar 10, 2025 at 03:24:16PM -0700, Kees Cook wrote:
> GCC 15's -Wunterminated-string-initialization saw that this string was
> being truncated. Adjust the initializer so that the needed final NUL
> character will be present.
> 
> Cc: Nicolas Ferre <nicolas.ferre@...rochip.com>
> Cc: Claudiu Beznea <claudiu.beznea@...on.dev>
> Cc: Andrew Lunn <andrew+netdev@...n.ch>
> Cc: "David S. Miller" <davem@...emloft.net>
> Cc: Eric Dumazet <edumazet@...gle.com>
> Cc: Jakub Kicinski <kuba@...nel.org>
> Cc: Paolo Abeni <pabeni@...hat.com>
> Cc: netdev@...r.kernel.org
> Signed-off-by: Kees Cook <kees@...nel.org>
> ---
>  drivers/net/ethernet/cadence/macb.h | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/cadence/macb.h b/drivers/net/ethernet/cadence/macb.h
> index 2847278d9cd4..9a6acb97c82d 100644
> --- a/drivers/net/ethernet/cadence/macb.h
> +++ b/drivers/net/ethernet/cadence/macb.h
> @@ -1067,7 +1067,8 @@ static const struct gem_statistic gem_statistics[] = {
>  	GEM_STAT_TITLE(TX256CNT, "tx_256_511_byte_frames"),
>  	GEM_STAT_TITLE(TX512CNT, "tx_512_1023_byte_frames"),
>  	GEM_STAT_TITLE(TX1024CNT, "tx_1024_1518_byte_frames"),
> -	GEM_STAT_TITLE(TX1519CNT, "tx_greater_than_1518_byte_frames"),
> +	GEM_STAT_TITLE(TX1519CNT, "tx_greater_than_1518_byte_frame"),
> +
>  	GEM_STAT_TITLE_BITS(TXURUNCNT, "tx_underrun",
>  			    GEM_BIT(NDS_TXERR)|GEM_BIT(NDS_TXFIFOERR)),
>  	GEM_STAT_TITLE_BITS(SNGLCOLLCNT, "tx_single_collision_frames",

"rx_greater_than_1518_byte_frames" is also 32, probably you should fix
that too.

Thanks

> -- 
> 2.34.1
>