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

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Message-ID: <89aa0c11-4f6a-e196-f5a1-89b886a61a4e@embeddedor.com>
Date:   Mon, 17 May 2021 19:58:19 -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,

If you don't mind, I'm taking this in my -next[1] branch for v5.14.

Thanks
--
Gustavo

[1] https://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux.git/log/?h=for-next/kspp

On 4/20/21 15:10, Gustavo A. R. Silva wrote:
> 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:
>>