selinux: support IPPROTO_SMC in socket_type_to_security_class()

[Jeongjun Park <aha310510@gmail.com>]

IPPROTO_SMC feature has been added to net/smc. It is now possible to 
create smc sockets in the following way:

  /* create v4 smc sock */
  v4 = socket(AF_INET, SOCK_STREAM, IPPROTO_SMC);

  /* create v6 smc sock */
  v6 = socket(AF_INET6, SOCK_STREAM, IPPROTO_SMC);

Therefore, we need to add code to support IPPROTO_SMC in 
socket_type_to_security_class().

Signed-off-by: Jeongjun Park <aha310510@gmail.com>
---
 security/selinux/hooks.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index bfa61e005aac..36f951f0c574 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -1176,6 +1176,8 @@ static inline u16 socket_type_to_security_class(int family, int type, int protoc
 				return SECCLASS_TCP_SOCKET;
 			else if (extsockclass && protocol == IPPROTO_SCTP)
 				return SECCLASS_SCTP_SOCKET;
+			else if (extsockclass && protocol == IPPROTO_SMC)
+				return SECCLASS_SMC_SOCKET;
 			else
 				return SECCLASS_RAWIP_SOCKET;
 		case SOCK_DGRAM:
--