[PATCH v3 RFC] Smack: Check UDP-Lite and DCCP protocols during IPv6 handling

[Piotr Sawicki]

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>
---
  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)
-- 
2.7.4
--
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