[PATCH v4 RFC] Smack: Check UDP-Lite and DCCP protocols during IPv6 handling

[Casey Schaufler]

On 7/19/2018 2:45 AM, Piotr Sawicki wrote:
> The smack_socket_sock_rcv_skb() function is checking smack labels
> only for UDP and TCP frames carried in IPv6 packets. From now on,
> it is able also to handle UDP-Lite and DCCP protocols.
>
> Signed-off-by: Piotr Sawicki <p.sawicki2 at partner.samsung.com>

Added to git://github.com/cschaufler/next-smack.git#smack-for-4.19-a

> ---
> Changes in v2:
>  - Add missing Signed-off-by field
> Changes in v3:
>  - Fix the email subject
> Changes in v4:
>  - Fix formatting issues caused by improper email client configuration
> ---
>  security/smack/smack_lsm.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
> index 8b6cd5a..c2282ac 100644
> --- a/security/smack/smack_lsm.c
> +++ b/security/smack/smack_lsm.c
> @@ -3896,6 +3896,7 @@ static int smk_skb_to_addr_ipv6(struct sk_buff *skb, struct sockaddr_in6 *sip)
>  			sip->sin6_port = th->source;
>  		break;
>  	case IPPROTO_UDP:
> +	case IPPROTO_UDPLITE:
>  		uh = skb_header_pointer(skb, offset, sizeof(_udph), &_udph);
>  		if (uh != NULL)
>  			sip->sin6_port = uh->source;
> @@ -3986,7 +3987,8 @@ static int smack_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
>  #if IS_ENABLED(CONFIG_IPV6)
>  	case PF_INET6:
>  		proto = smk_skb_to_addr_ipv6(skb, &sadd);
> -		if (proto != IPPROTO_UDP && proto != IPPROTO_TCP)
> +		if (proto != IPPROTO_UDP && proto != IPPROTO_UDPLITE &&
> +		    proto != IPPROTO_TCP && proto != IPPROTO_DCCP)
>  			break;
>  #ifdef SMACK_IPV6_SECMARK_LABELING
>  		if (skb && skb->secmark != 0)

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