linux-hardening - Re: [PATCH RESEND][next] net/packet: Fix fall-through warnings for Clang

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Date:   Tue, 20 Apr 2021 15:10:42 -0500
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-hardening@...r.kernel.org
Subject: Re: [PATCH RESEND][next] net/packet: Fix fall-through warnings for
 Clang

Hi all,

Friendly ping: who can take this, please?

Thanks
--
Gustavo

On 3/5/21 03:44, Gustavo A. R. Silva wrote:
> In preparation to enable -Wimplicit-fallthrough for Clang, fix a warning
> by explicitly adding a break statement instead of letting the code fall
> through to the next case.
> 
> Link: https://github.com/KSPP/linux/issues/115
> Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
> ---
>  net/packet/af_packet.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
> index e24b2841c643..880a1ab9a305 100644
> --- a/net/packet/af_packet.c
> +++ b/net/packet/af_packet.c
> @@ -1652,6 +1652,7 @@ static int fanout_add(struct sock *sk, struct fanout_args *args)
>  	case PACKET_FANOUT_ROLLOVER:
>  		if (type_flags & PACKET_FANOUT_FLAG_ROLLOVER)
>  			return -EINVAL;
> +		break;
>  	case PACKET_FANOUT_HASH:
>  	case PACKET_FANOUT_LB:
>  	case PACKET_FANOUT_CPU:
>