Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/selinux-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/selinux-2.6:
  selinux: preserve boolean values across policy reloads
  selinux: change numbering of boolean directory inodes in selinuxfs
  selinux: remove unused enumeration constant from selinuxfs
  selinux: explicitly number all selinuxfs inodes
  selinux: export initial SID contexts via selinuxfs
  selinux: remove userland security class and permission definitions
  SELinux: move security_skb_extlbl_sid() out of the security server
  MAINTAINERS: update selinux entry
  SELinux: rename selinux_netlabel.h to netlabel.h
  SELinux: extract the NetLabel SELinux support from the security server
  NetLabel: convert a BUG_ON in the CIPSO code to a runtime check
  NetLabel: cleanup and document CIPSO constants

MAINTAINERS

@@ -2980,8 +2980,10 @@ P:	Stephen Smalley
 M:	sds@tycho.nsa.gov
 P:	James Morris
 M:	jmorris@namei.org
+P:	Eric Paris
+M:	eparis@parisplace.org
 L:	linux-kernel@vger.kernel.org (kernel issues)
-L: 	selinux@tycho.nsa.gov (general discussion)
+L: 	selinux@tycho.nsa.gov (subscribers-only, general discussion)
 W:	http://www.nsa.gov/selinux
 S:	Supported
 

net/ipv4/cipso_ipv4.c

@@ -91,6 +91,33 @@ static struct cipso_v4_map_cache_bkt *cipso_v4_cache = NULL;
 int cipso_v4_rbm_optfmt = 0;
 int cipso_v4_rbm_strictvalid = 1;
 
+/*
+ * Protocol Constants
+ */
+
+/* Maximum size of the CIPSO IP option, derived from the fact that the maximum
+ * IPv4 header size is 60 bytes and the base IPv4 header is 20 bytes long. */
+#define CIPSO_V4_OPT_LEN_MAX          40
+
+/* Length of the base CIPSO option, this includes the option type (1 byte), the
+ * option length (1 byte), and the DOI (4 bytes). */
+#define CIPSO_V4_HDR_LEN              6
+
+/* Base length of the restrictive category bitmap tag (tag #1). */
+#define CIPSO_V4_TAG_RBM_BLEN         4
+
+/* Base length of the enumerated category tag (tag #2). */
+#define CIPSO_V4_TAG_ENUM_BLEN        4
+
+/* Base length of the ranged categories bitmap tag (tag #5). */
+#define CIPSO_V4_TAG_RNG_BLEN         4
+/* The maximum number of category ranges permitted in the ranged category tag
+ * (tag #5).  You may note that the IETF draft states that the maximum number
+ * of category ranges is 7, but if the low end of the last category range is
+ * zero then it is possibile to fit 8 category ranges because the zero should
+ * be omitted. */
+#define CIPSO_V4_TAG_RNG_CAT_MAX      8
+
 /*
  * Helper Functions
  */
@@ -1109,16 +1136,15 @@ static int cipso_v4_map_cat_rng_hton(const struct cipso_v4_doi *doi_def,
 				     unsigned char *net_cat,
 				     u32 net_cat_len)
 {
-	/* The constant '16' is not random, it is the maximum number of
-	 * high/low category range pairs as permitted by the CIPSO draft based
-	 * on a maximum IPv4 header length of 60 bytes - the BUG_ON() assertion
-	 * does a sanity check to make sure we don't overflow the array. */
 	int iter = -1;
-	u16 array[16];
+	u16 array[CIPSO_V4_TAG_RNG_CAT_MAX * 2];
 	u32 array_cnt = 0;
 	u32 cat_size = 0;
 
-	BUG_ON(net_cat_len > 30);
+	/* make sure we don't overflow the 'array[]' variable */
+	if (net_cat_len >
+	    (CIPSO_V4_OPT_LEN_MAX - CIPSO_V4_HDR_LEN - CIPSO_V4_TAG_RNG_BLEN))
+		return -ENOSPC;
 
 	for (;;) {
 		iter = netlbl_secattr_catmap_walk(secattr->mls_cat, iter + 1);
@@ -1196,9 +1222,6 @@ static int cipso_v4_map_cat_rng_ntoh(const struct cipso_v4_doi *doi_def,
  * Protocol Handling Functions
  */
 
-#define CIPSO_V4_OPT_LEN_MAX          40
-#define CIPSO_V4_HDR_LEN              6
-
 /**
  * cipso_v4_gentag_hdr - Generate a CIPSO option header
  * @doi_def: the DOI definition

net/netlabel/netlabel_kapi.c

@@ -263,9 +263,6 @@ int netlbl_socket_setattr(const struct socket *sock,
 	int ret_val = -ENOENT;
 	struct netlbl_dom_map *dom_entry;
 
-	if ((secattr->flags & NETLBL_SECATTR_DOMAIN) == 0)
-		return -ENOENT;
-
 	rcu_read_lock();
 	dom_entry = netlbl_domhsh_getentry(secattr->domain);
 	if (dom_entry == NULL)

security/selinux/Makefile

@@ -8,5 +8,7 @@ selinux-y := avc.o hooks.o selinuxfs.o netlink.o nlmsgtab.o netif.o exports.o
 
 selinux-$(CONFIG_SECURITY_NETWORK_XFRM) += xfrm.o
 
+selinux-$(CONFIG_NETLABEL) += netlabel.o
+
 EXTRA_CFLAGS += -Isecurity/selinux/include
 

security/selinux/avc.c

@@ -217,6 +217,8 @@ static void avc_dump_query(struct audit_buffer *ab, u32 ssid, u32 tsid, u16 tcla
 		audit_log_format(ab, " tcontext=%s", scontext);
 		kfree(scontext);
 	}
+
+	BUG_ON(tclass >= ARRAY_SIZE(class_to_string) || !class_to_string[tclass]);
 	audit_log_format(ab, " tclass=%s", class_to_string[tclass]);
 }
 

security/selinux/hooks.c

@@ -77,7 +77,7 @@
 #include "objsec.h"
 #include "netif.h"
 #include "xfrm.h"
-#include "selinux_netlabel.h"
+#include "netlabel.h"
 
 #define XATTR_SELINUX_SUFFIX "selinux"
 #define XATTR_NAME_SELINUX XATTR_SECURITY_PREFIX XATTR_SELINUX_SUFFIX
@@ -3123,6 +3123,34 @@ static int selinux_parse_skb(struct sk_buff *skb, struct avc_audit_data *ad,
 	return ret;
 }
 
+/**
+ * selinux_skb_extlbl_sid - Determine the external label of a packet
+ * @skb: the packet
+ * @base_sid: the SELinux SID to use as a context for MLS only external labels
+ * @sid: the packet's SID
+ *
+ * Description:
+ * Check the various different forms of external packet labeling and determine
+ * the external SID for the packet.
+ *
+ */
+static void selinux_skb_extlbl_sid(struct sk_buff *skb,
+				   u32 base_sid,
+				   u32 *sid)
+{
+	u32 xfrm_sid;
+	u32 nlbl_sid;
+
+	selinux_skb_xfrm_sid(skb, &xfrm_sid);
+	if (selinux_netlbl_skbuff_getsid(skb,
+					 (xfrm_sid == SECSID_NULL ?
+					  base_sid : xfrm_sid),
+					 &nlbl_sid) != 0)
+		nlbl_sid = SECSID_NULL;
+
+	*sid = (nlbl_sid == SECSID_NULL ? xfrm_sid : nlbl_sid);
+}
+
 /* socket security operations */
 static int socket_has_perm(struct task_struct *task, struct socket *sock,
 			   u32 perms)
@@ -3664,9 +3692,7 @@ static int selinux_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *
 	if (sock && sock->sk->sk_family == PF_UNIX)
 		selinux_get_inode_sid(SOCK_INODE(sock), &peer_secid);
 	else if (skb)
-		security_skb_extlbl_sid(skb,
-					SECINITSID_UNLABELED,
-					&peer_secid);
+		selinux_skb_extlbl_sid(skb, SECINITSID_UNLABELED, &peer_secid);
 
 	if (peer_secid == SECSID_NULL)
 		err = -EINVAL;
@@ -3727,7 +3753,7 @@ static int selinux_inet_conn_request(struct sock *sk, struct sk_buff *skb,
 	u32 newsid;
 	u32 peersid;
 
-	security_skb_extlbl_sid(skb, SECINITSID_UNLABELED, &peersid);
+	selinux_skb_extlbl_sid(skb, SECINITSID_UNLABELED, &peersid);
 	if (peersid == SECSID_NULL) {
 		req->secid = sksec->sid;
 		req->peer_secid = SECSID_NULL;
@@ -3765,7 +3791,7 @@ static void selinux_inet_conn_established(struct sock *sk,
 {
 	struct sk_security_struct *sksec = sk->sk_security;
 
-	security_skb_extlbl_sid(skb, SECINITSID_UNLABELED, &sksec->peer_sid);
+	selinux_skb_extlbl_sid(skb, SECINITSID_UNLABELED, &sksec->peer_sid);
 }
 
 static void selinux_req_classify_flow(const struct request_sock *req,

security/selinux/include/av_perm_to_string.h

@@ -128,96 +128,6 @@
    S_(SECCLASS_CAPABILITY, CAPABILITY__LEASE, "lease")
    S_(SECCLASS_CAPABILITY, CAPABILITY__AUDIT_WRITE, "audit_write")
    S_(SECCLASS_CAPABILITY, CAPABILITY__AUDIT_CONTROL, "audit_control")
-   S_(SECCLASS_PASSWD, PASSWD__PASSWD, "passwd")
-   S_(SECCLASS_PASSWD, PASSWD__CHFN, "chfn")
-   S_(SECCLASS_PASSWD, PASSWD__CHSH, "chsh")
-   S_(SECCLASS_PASSWD, PASSWD__ROOTOK, "rootok")
-   S_(SECCLASS_PASSWD, PASSWD__CRONTAB, "crontab")
-   S_(SECCLASS_DRAWABLE, DRAWABLE__CREATE, "create")
-   S_(SECCLASS_DRAWABLE, DRAWABLE__DESTROY, "destroy")
-   S_(SECCLASS_DRAWABLE, DRAWABLE__DRAW, "draw")
-   S_(SECCLASS_DRAWABLE, DRAWABLE__COPY, "copy")
-   S_(SECCLASS_DRAWABLE, DRAWABLE__GETATTR, "getattr")
-   S_(SECCLASS_GC, GC__CREATE, "create")
-   S_(SECCLASS_GC, GC__FREE, "free")
-   S_(SECCLASS_GC, GC__GETATTR, "getattr")
-   S_(SECCLASS_GC, GC__SETATTR, "setattr")
-   S_(SECCLASS_WINDOW, WINDOW__ADDCHILD, "addchild")
-   S_(SECCLASS_WINDOW, WINDOW__CREATE, "create")
-   S_(SECCLASS_WINDOW, WINDOW__DESTROY, "destroy")
-   S_(SECCLASS_WINDOW, WINDOW__MAP, "map")
-   S_(SECCLASS_WINDOW, WINDOW__UNMAP, "unmap")
-   S_(SECCLASS_WINDOW, WINDOW__CHSTACK, "chstack")
-   S_(SECCLASS_WINDOW, WINDOW__CHPROPLIST, "chproplist")
-   S_(SECCLASS_WINDOW, WINDOW__CHPROP, "chprop")
-   S_(SECCLASS_WINDOW, WINDOW__LISTPROP, "listprop")
-   S_(SECCLASS_WINDOW, WINDOW__GETATTR, "getattr")
-   S_(SECCLASS_WINDOW, WINDOW__SETATTR, "setattr")
-   S_(SECCLASS_WINDOW, WINDOW__SETFOCUS, "setfocus")
-   S_(SECCLASS_WINDOW, WINDOW__MOVE, "move")
-   S_(SECCLASS_WINDOW, WINDOW__CHSELECTION, "chselection")
-   S_(SECCLASS_WINDOW, WINDOW__CHPARENT, "chparent")
-   S_(SECCLASS_WINDOW, WINDOW__CTRLLIFE, "ctrllife")
-   S_(SECCLASS_WINDOW, WINDOW__ENUMERATE, "enumerate")
-   S_(SECCLASS_WINDOW, WINDOW__TRANSPARENT, "transparent")
-   S_(SECCLASS_WINDOW, WINDOW__MOUSEMOTION, "mousemotion")
-   S_(SECCLASS_WINDOW, WINDOW__CLIENTCOMEVENT, "clientcomevent")
-   S_(SECCLASS_WINDOW, WINDOW__INPUTEVENT, "inputevent")
-   S_(SECCLASS_WINDOW, WINDOW__DRAWEVENT, "drawevent")
-   S_(SECCLASS_WINDOW, WINDOW__WINDOWCHANGEEVENT, "windowchangeevent")
-   S_(SECCLASS_WINDOW, WINDOW__WINDOWCHANGEREQUEST, "windowchangerequest")
-   S_(SECCLASS_WINDOW, WINDOW__SERVERCHANGEEVENT, "serverchangeevent")
-   S_(SECCLASS_WINDOW, WINDOW__EXTENSIONEVENT, "extensionevent")
-   S_(SECCLASS_FONT, FONT__LOAD, "load")
-   S_(SECCLASS_FONT, FONT__FREE, "free")
-   S_(SECCLASS_FONT, FONT__GETATTR, "getattr")
-   S_(SECCLASS_FONT, FONT__USE, "use")
-   S_(SECCLASS_COLORMAP, COLORMAP__CREATE, "create")
-   S_(SECCLASS_COLORMAP, COLORMAP__FREE, "free")
-   S_(SECCLASS_COLORMAP, COLORMAP__INSTALL, "install")
-   S_(SECCLASS_COLORMAP, COLORMAP__UNINSTALL, "uninstall")
-   S_(SECCLASS_COLORMAP, COLORMAP__LIST, "list")
-   S_(SECCLASS_COLORMAP, COLORMAP__READ, "read")
-   S_(SECCLASS_COLORMAP, COLORMAP__STORE, "store")
-   S_(SECCLASS_COLORMAP, COLORMAP__GETATTR, "getattr")
-   S_(SECCLASS_COLORMAP, COLORMAP__SETATTR, "setattr")
-   S_(SECCLASS_PROPERTY, PROPERTY__CREATE, "create")
-   S_(SECCLASS_PROPERTY, PROPERTY__FREE, "free")
-   S_(SECCLASS_PROPERTY, PROPERTY__READ, "read")
-   S_(SECCLASS_PROPERTY, PROPERTY__WRITE, "write")
-   S_(SECCLASS_CURSOR, CURSOR__CREATE, "create")
-   S_(SECCLASS_CURSOR, CURSOR__CREATEGLYPH, "createglyph")
-   S_(SECCLASS_CURSOR, CURSOR__FREE, "free")
-   S_(SECCLASS_CURSOR, CURSOR__ASSIGN, "assign")
-   S_(SECCLASS_CURSOR, CURSOR__SETATTR, "setattr")
-   S_(SECCLASS_XCLIENT, XCLIENT__KILL, "kill")
-   S_(SECCLASS_XINPUT, XINPUT__LOOKUP, "lookup")
-   S_(SECCLASS_XINPUT, XINPUT__GETATTR, "getattr")
-   S_(SECCLASS_XINPUT, XINPUT__SETATTR, "setattr")
-   S_(SECCLASS_XINPUT, XINPUT__SETFOCUS, "setfocus")
-   S_(SECCLASS_XINPUT, XINPUT__WARPPOINTER, "warppointer")
-   S_(SECCLASS_XINPUT, XINPUT__ACTIVEGRAB, "activegrab")
-   S_(SECCLASS_XINPUT, XINPUT__PASSIVEGRAB, "passivegrab")
-   S_(SECCLASS_XINPUT, XINPUT__UNGRAB, "ungrab")
-   S_(SECCLASS_XINPUT, XINPUT__BELL, "bell")
-   S_(SECCLASS_XINPUT, XINPUT__MOUSEMOTION, "mousemotion")
-   S_(SECCLASS_XINPUT, XINPUT__RELABELINPUT, "relabelinput")
-   S_(SECCLASS_XSERVER, XSERVER__SCREENSAVER, "screensaver")
-   S_(SECCLASS_XSERVER, XSERVER__GETHOSTLIST, "gethostlist")
-   S_(SECCLASS_XSERVER, XSERVER__SETHOSTLIST, "sethostlist")
-   S_(SECCLASS_XSERVER, XSERVER__GETFONTPATH, "getfontpath")
-   S_(SECCLASS_XSERVER, XSERVER__SETFONTPATH, "setfontpath")
-   S_(SECCLASS_XSERVER, XSERVER__GETATTR, "getattr")
-   S_(SECCLASS_XSERVER, XSERVER__GRAB, "grab")
-   S_(SECCLASS_XSERVER, XSERVER__UNGRAB, "ungrab")
-   S_(SECCLASS_XEXTENSION, XEXTENSION__QUERY, "query")
-   S_(SECCLASS_XEXTENSION, XEXTENSION__USE, "use")
-   S_(SECCLASS_PAX, PAX__PAGEEXEC, "pageexec")
-   S_(SECCLASS_PAX, PAX__EMUTRAMP, "emutramp")
-   S_(SECCLASS_PAX, PAX__MPROTECT, "mprotect")
-   S_(SECCLASS_PAX, PAX__RANDMMAP, "randmmap")
-   S_(SECCLASS_PAX, PAX__RANDEXEC, "randexec")
-   S_(SECCLASS_PAX, PAX__SEGMEXEC, "segmexec")
    S_(SECCLASS_NETLINK_ROUTE_SOCKET, NETLINK_ROUTE_SOCKET__NLMSG_READ, "nlmsg_read")
    S_(SECCLASS_NETLINK_ROUTE_SOCKET, NETLINK_ROUTE_SOCKET__NLMSG_WRITE, "nlmsg_write")
    S_(SECCLASS_NETLINK_FIREWALL_SOCKET, NETLINK_FIREWALL_SOCKET__NLMSG_READ, "nlmsg_read")
@@ -232,16 +142,6 @@
    S_(SECCLASS_NETLINK_AUDIT_SOCKET, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV, "nlmsg_readpriv")
    S_(SECCLASS_NETLINK_IP6FW_SOCKET, NETLINK_IP6FW_SOCKET__NLMSG_READ, "nlmsg_read")
    S_(SECCLASS_NETLINK_IP6FW_SOCKET, NETLINK_IP6FW_SOCKET__NLMSG_WRITE, "nlmsg_write")
-   S_(SECCLASS_DBUS, DBUS__ACQUIRE_SVC, "acquire_svc")
-   S_(SECCLASS_DBUS, DBUS__SEND_MSG, "send_msg")
-   S_(SECCLASS_NSCD, NSCD__GETPWD, "getpwd")
-   S_(SECCLASS_NSCD, NSCD__GETGRP, "getgrp")
-   S_(SECCLASS_NSCD, NSCD__GETHOST, "gethost")
-   S_(SECCLASS_NSCD, NSCD__GETSTAT, "getstat")
-   S_(SECCLASS_NSCD, NSCD__ADMIN, "admin")
-   S_(SECCLASS_NSCD, NSCD__SHMEMPWD, "shmempwd")
-   S_(SECCLASS_NSCD, NSCD__SHMEMGRP, "shmemgrp")
-   S_(SECCLASS_NSCD, NSCD__SHMEMHOST, "shmemhost")
    S_(SECCLASS_ASSOCIATION, ASSOCIATION__SENDTO, "sendto")
    S_(SECCLASS_ASSOCIATION, ASSOCIATION__RECVFROM, "recvfrom")
    S_(SECCLASS_ASSOCIATION, ASSOCIATION__SETCONTEXT, "setcontext")
@@ -256,7 +156,5 @@
    S_(SECCLASS_KEY, KEY__LINK, "link")
    S_(SECCLASS_KEY, KEY__SETATTR, "setattr")
    S_(SECCLASS_KEY, KEY__CREATE, "create")
-   S_(SECCLASS_CONTEXT, CONTEXT__TRANSLATE, "translate")
-   S_(SECCLASS_CONTEXT, CONTEXT__CONTAINS, "contains")
    S_(SECCLASS_DCCP_SOCKET, DCCP_SOCKET__NODE_BIND, "node_bind")
    S_(SECCLASS_DCCP_SOCKET, DCCP_SOCKET__NAME_CONNECT, "name_connect")

security/selinux/include/class_to_string.h

@@ -2,7 +2,7 @@
 /*
  * Security object class definitions
  */
-    S_("null")
+    S_(NULL)
     S_("security")
     S_("process")
     S_("system")
@@ -32,19 +32,19 @@
     S_("msgq")
     S_("shm")
     S_("ipc")
-    S_("passwd")
-    S_("drawable")
-    S_("window")
-    S_("gc")
-    S_("font")
-    S_("colormap")
-    S_("property")
-    S_("cursor")
-    S_("xclient")
-    S_("xinput")
-    S_("xserver")
-    S_("xextension")
-    S_("pax")
+    S_(NULL)
+    S_(NULL)
+    S_(NULL)
+    S_(NULL)
+    S_(NULL)
+    S_(NULL)
+    S_(NULL)
+    S_(NULL)
+    S_(NULL)
+    S_(NULL)
+    S_(NULL)
+    S_(NULL)
+    S_(NULL)
     S_("netlink_route_socket")
     S_("netlink_firewall_socket")
     S_("netlink_tcpdiag_socket")
@@ -54,12 +54,12 @@
     S_("netlink_audit_socket")
     S_("netlink_ip6fw_socket")
     S_("netlink_dnrt_socket")
-    S_("dbus")
-    S_("nscd")
+    S_(NULL)
+    S_(NULL)
     S_("association")
     S_("netlink_kobject_uevent_socket")
     S_("appletalk_socket")
     S_("packet")
     S_("key")
-    S_("context")
+    S_(NULL)
     S_("dccp_socket")

security/selinux/include/flask.h

@@ -34,19 +34,6 @@
 #define SECCLASS_MSGQ                                    27
 #define SECCLASS_SHM                                     28
 #define SECCLASS_IPC                                     29
-#define SECCLASS_PASSWD                                  30
-#define SECCLASS_DRAWABLE                                31
-#define SECCLASS_WINDOW                                  32
-#define SECCLASS_GC                                      33
-#define SECCLASS_FONT                                    34
-#define SECCLASS_COLORMAP                                35
-#define SECCLASS_PROPERTY                                36
-#define SECCLASS_CURSOR                                  37
-#define SECCLASS_XCLIENT                                 38
-#define SECCLASS_XINPUT                                  39
-#define SECCLASS_XSERVER                                 40
-#define SECCLASS_XEXTENSION                              41
-#define SECCLASS_PAX                                     42
 #define SECCLASS_NETLINK_ROUTE_SOCKET                    43
 #define SECCLASS_NETLINK_FIREWALL_SOCKET                 44
 #define SECCLASS_NETLINK_TCPDIAG_SOCKET                  45
@@ -56,14 +43,11 @@
 #define SECCLASS_NETLINK_AUDIT_SOCKET                    49
 #define SECCLASS_NETLINK_IP6FW_SOCKET                    50
 #define SECCLASS_NETLINK_DNRT_SOCKET                     51
-#define SECCLASS_DBUS                                    52
-#define SECCLASS_NSCD                                    53
 #define SECCLASS_ASSOCIATION                             54
 #define SECCLASS_NETLINK_KOBJECT_UEVENT_SOCKET           55
 #define SECCLASS_APPLETALK_SOCKET                        56
 #define SECCLASS_PACKET                                  57
 #define SECCLASS_KEY                                     58
-#define SECCLASS_CONTEXT                                 59
 #define SECCLASS_DCCP_SOCKET                             60
 
 /*

security/selinux/include/selinux_netlabel.h → security/selinux/include/netlabel.h

@@ -38,19 +38,22 @@
 
 #ifdef CONFIG_NETLABEL
 void selinux_netlbl_cache_invalidate(void);
-int selinux_netlbl_skbuff_getsid(struct sk_buff *skb, u32 base_sid, u32 *sid);
-int selinux_netlbl_socket_post_create(struct socket *sock);
-void selinux_netlbl_sock_graft(struct sock *sk, struct socket *sock);
-int selinux_netlbl_sock_rcv_skb(struct sk_security_struct *sksec,
-				struct sk_buff *skb,
-				struct avc_audit_data *ad);
+
 void selinux_netlbl_sk_security_reset(struct sk_security_struct *ssec,
 				      int family);
 void selinux_netlbl_sk_security_init(struct sk_security_struct *ssec,
 				     int family);
 void selinux_netlbl_sk_security_clone(struct sk_security_struct *ssec,
 				      struct sk_security_struct *newssec);
+
+int selinux_netlbl_skbuff_getsid(struct sk_buff *skb, u32 base_sid, u32 *sid);
+
+void selinux_netlbl_sock_graft(struct sock *sk, struct socket *sock);
+int selinux_netlbl_socket_post_create(struct socket *sock);
 int selinux_netlbl_inode_permission(struct inode *inode, int mask);
+int selinux_netlbl_sock_rcv_skb(struct sk_security_struct *sksec,
+				struct sk_buff *skb,
+				struct avc_audit_data *ad);
 int selinux_netlbl_socket_setsockopt(struct socket *sock,
 				     int level,
 				     int optname);
@@ -60,46 +63,18 @@ static inline void selinux_netlbl_cache_invalidate(void)
 	return;
 }
 
-static inline int selinux_netlbl_skbuff_getsid(struct sk_buff *skb,
-					       u32 base_sid,
-					       u32 *sid)
-{
-	*sid = SECSID_NULL;
-	return 0;
-}
-
-static inline int selinux_netlbl_socket_post_create(struct socket *sock)
-{
-	return 0;
-}
-
-static inline void selinux_netlbl_sock_graft(struct sock *sk,
-					     struct socket *sock)
-{
-	return;
-}
-
-static inline int selinux_netlbl_sock_rcv_skb(struct sk_security_struct *sksec,
-					      struct sk_buff *skb,
-					      struct avc_audit_data *ad)
-{
-	return 0;
-}
-
 static inline void selinux_netlbl_sk_security_reset(
 	                                       struct sk_security_struct *ssec,
 					       int family)
 {
 	return;
 }
-
 static inline void selinux_netlbl_sk_security_init(
 	                                       struct sk_security_struct *ssec,
 					       int family)
 {
 	return;
 }
-
 static inline void selinux_netlbl_sk_security_clone(
 	                                    struct sk_security_struct *ssec,
 					    struct sk_security_struct *newssec)
@@ -107,12 +82,34 @@ static inline void selinux_netlbl_sk_security_clone(
 	return;
 }
 
+static inline int selinux_netlbl_skbuff_getsid(struct sk_buff *skb,
+					       u32 base_sid,
+					       u32 *sid)
+{
+	*sid = SECSID_NULL;
+	return 0;
+}
+
+static inline void selinux_netlbl_sock_graft(struct sock *sk,
+					     struct socket *sock)
+{
+	return;
+}
+static inline int selinux_netlbl_socket_post_create(struct socket *sock)
+{
+	return 0;
+}
 static inline int selinux_netlbl_inode_permission(struct inode *inode,
 						  int mask)
 {
 	return 0;
 }
-
+static inline int selinux_netlbl_sock_rcv_skb(struct sk_security_struct *sksec,
+					      struct sk_buff *skb,
+					      struct avc_audit_data *ad)
+{
+	return 0;
+}
 static inline int selinux_netlbl_socket_setsockopt(struct socket *sock,
 						   int level,
 						   int optname)

security/selinux/include/security.h

@@ -34,7 +34,7 @@
 #define POLICYDB_VERSION_MAX	POLICYDB_VERSION_RANGETRANS
 #endif
 
-struct sk_buff;
+struct netlbl_lsm_secattr;
 
 extern int selinux_enabled;
 extern int selinux_mls_enabled;
@@ -82,8 +82,6 @@ int security_netif_sid(char *name, u32 *if_sid,
 int security_node_sid(u16 domain, void *addr, u32 addrlen,
 	u32 *out_sid);
 
-void security_skb_extlbl_sid(struct sk_buff *skb, u32 base_sid, u32 *sid);
-
 int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
                                  u16 tclass);
 
@@ -102,5 +100,30 @@ int security_fs_use(const char *fstype, unsigned int *behavior,
 int security_genfs_sid(const char *fstype, char *name, u16 sclass,
 	u32 *sid);
 
+#ifdef CONFIG_NETLABEL
+int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
+				   u32 base_sid,
+				   u32 *sid);
+
+int security_netlbl_sid_to_secattr(u32 sid,
+				   struct netlbl_lsm_secattr *secattr);
+#else
+static inline int security_netlbl_secattr_to_sid(
+					    struct netlbl_lsm_secattr *secattr,
+					    u32 base_sid,
+					    u32 *sid)
+{
+	return -EIDRM;
+}
+
+static inline int security_netlbl_sid_to_secattr(u32 sid,
+					   struct netlbl_lsm_secattr *secattr)
+{
+	return -ENOENT;
+}
+#endif /* CONFIG_NETLABEL */
+
+const char *security_get_initial_sid_context(u32 sid);
+
 #endif /* _SELINUX_SECURITY_H_ */
 

security/selinux/netlabel.c

+/*
+ * SELinux NetLabel Support
+ *
+ * This file provides the necessary glue to tie NetLabel into the SELinux
+ * subsystem.
+ *
+ * Author: Paul Moore <paul.moore@hp.com>
+ *
+ */
+
+/*
+ * (c) Copyright Hewlett-Packard Development Company, L.P., 2007
+ *
+ * This program is free software;  you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY;  without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program;  if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/spinlock.h>
+#include <linux/rcupdate.h>
+#include <net/sock.h>
+#include <net/netlabel.h>
+
+#include "objsec.h"
+#include "security.h"
+
+/**
+ * selinux_netlbl_socket_setsid - Label a socket using the NetLabel mechanism
+ * @sock: the socket to label
+ * @sid: the SID to use
+ *
+ * Description:
+ * Attempt to label a socket using the NetLabel mechanism using the given
+ * SID.  Returns zero values on success, negative values on failure.  The
+ * caller is responsibile for calling rcu_read_lock() before calling this
+ * this function and rcu_read_unlock() after this function returns.
+ *
+ */
+static int selinux_netlbl_socket_setsid(struct socket *sock, u32 sid)
+{
+	int rc;
+	struct sk_security_struct *sksec = sock->sk->sk_security;
+	struct netlbl_lsm_secattr secattr;
+
+	rc = security_netlbl_sid_to_secattr(sid, &secattr);
+	if (rc != 0)
+		return rc;
+
+	rc = netlbl_socket_setattr(sock, &secattr);
+	if (rc == 0) {
+		spin_lock_bh(&sksec->nlbl_lock);
+		sksec->nlbl_state = NLBL_LABELED;
+		spin_unlock_bh(&sksec->nlbl_lock);
+	}
+
+	return rc;
+}
+
+/**
+ * selinux_netlbl_cache_invalidate - Invalidate the NetLabel cache
+ *
+ * Description:
+ * Invalidate the NetLabel security attribute mapping cache.
+ *
+ */
+void selinux_netlbl_cache_invalidate(void)
+{
+	netlbl_cache_invalidate();
+}
+
+/**
+ * selinux_netlbl_sk_security_reset - Reset the NetLabel fields
+ * @ssec: the sk_security_struct
+ * @family: the socket family
+ *
+ * Description:
+ * Called when the NetLabel state of a sk_security_struct needs to be reset.
+ * The caller is responsibile for all the NetLabel sk_security_struct locking.
+ *
+ */
+void selinux_netlbl_sk_security_reset(struct sk_security_struct *ssec,
+				      int family)
+{
+        if (family == PF_INET)
+		ssec->nlbl_state = NLBL_REQUIRE;
+	else
+		ssec->nlbl_state = NLBL_UNSET;
+}
+
+/**
+ * selinux_netlbl_sk_security_init - Setup the NetLabel fields
+ * @ssec: the sk_security_struct
+ * @family: the socket family
+ *
+ * Description:
+ * Called when a new sk_security_struct is allocated to initialize the NetLabel
+ * fields.
+ *
+ */
+void selinux_netlbl_sk_security_init(struct sk_security_struct *ssec,
+				     int family)
+{
+	/* No locking needed, we are the only one who has access to ssec */
+	selinux_netlbl_sk_security_reset(ssec, family);
+	spin_lock_init(&ssec->nlbl_lock);
+}
+
+/**
+ * selinux_netlbl_sk_security_clone - Copy the NetLabel fields
+ * @ssec: the original sk_security_struct
+ * @newssec: the cloned sk_security_struct
+ *
+ * Description:
+ * Clone the NetLabel specific sk_security_struct fields from @ssec to
+ * @newssec.
+ *
+ */
+void selinux_netlbl_sk_security_clone(struct sk_security_struct *ssec,
+				      struct sk_security_struct *newssec)
+{
+	/* We don't need to take newssec->nlbl_lock because we are the only
+	 * thread with access to newssec, but we do need to take the RCU read
+	 * lock as other threads could have access to ssec */
+	rcu_read_lock();
+	selinux_netlbl_sk_security_reset(newssec, ssec->sk->sk_family);
+	newssec->sclass = ssec->sclass;
+	rcu_read_unlock();
+}
+
+/**
+ * selinux_netlbl_skbuff_getsid - Get the sid of a packet using NetLabel
+ * @skb: the packet
+ * @base_sid: the SELinux SID to use as a context for MLS only attributes
+ * @sid: the SID
+ *
+ * Description:
+ * Call the NetLabel mechanism to get the security attributes of the given
+ * packet and use those attributes to determine the correct context/SID to
+ * assign to the packet.  Returns zero on success, negative values on failure.
+ *
+ */
+int selinux_netlbl_skbuff_getsid(struct sk_buff *skb, u32 base_sid, u32 *sid)
+{
+	int rc;
+	struct netlbl_lsm_secattr secattr;
+
+	netlbl_secattr_init(&secattr);
+	rc = netlbl_skbuff_getattr(skb, &secattr);
+	if (rc == 0 && secattr.flags != NETLBL_SECATTR_NONE)
+		rc = security_netlbl_secattr_to_sid(&secattr,
+						    base_sid,
+						    sid);
+	else
+		*sid = SECSID_NULL;
+	netlbl_secattr_destroy(&secattr);
+
+	return rc;
+}
+
+/**
+ * selinux_netlbl_sock_graft - Netlabel the new socket
+ * @sk: the new connection
+ * @sock: the new socket
+ *
+ * Description:
+ * The connection represented by @sk is being grafted onto @sock so set the
+ * socket's NetLabel to match the SID of @sk.
+ *
+ */
+void selinux_netlbl_sock_graft(struct sock *sk, struct socket *sock)
+{
+	struct inode_security_struct *isec = SOCK_INODE(sock)->i_security;
+	struct sk_security_struct *sksec = sk->sk_security;
+	struct netlbl_lsm_secattr secattr;
+	u32 nlbl_peer_sid;
+
+	sksec->sclass = isec->sclass;
+
+	rcu_read_lock();
+
+	if (sksec->nlbl_state != NLBL_REQUIRE) {
+		rcu_read_unlock();
+		return;
+	}
+
+	netlbl_secattr_init(&secattr);
+	if (netlbl_sock_getattr(sk, &secattr) == 0 &&
+	    secattr.flags != NETLBL_SECATTR_NONE &&
+	    security_netlbl_secattr_to_sid(&secattr,
+					   SECINITSID_UNLABELED,
+					   &nlbl_peer_sid) == 0)
+		sksec->peer_sid = nlbl_peer_sid;
+	netlbl_secattr_destroy(&secattr);
+
+	/* Try to set the NetLabel on the socket to save time later, if we fail
+	 * here we will pick up the pieces in later calls to
+	 * selinux_netlbl_inode_permission(). */
+	selinux_netlbl_socket_setsid(sock, sksec->sid);
+
+	rcu_read_unlock();
+}
+
+/**
+ * selinux_netlbl_socket_post_create - Label a socket using NetLabel
+ * @sock: the socket to label
+ *
+ * Description:
+ * Attempt to label a socket using the NetLabel mechanism using the given
+ * SID.  Returns zero values on success, negative values on failure.
+ *
+ */
+int selinux_netlbl_socket_post_create(struct socket *sock)
+{
+	int rc = 0;
+	struct inode_security_struct *isec = SOCK_INODE(sock)->i_security;
+	struct sk_security_struct *sksec = sock->sk->sk_security;
+
+	sksec->sclass = isec->sclass;
+
+	rcu_read_lock();
+	if (sksec->nlbl_state == NLBL_REQUIRE)
+		rc = selinux_netlbl_socket_setsid(sock, sksec->sid);
+	rcu_read_unlock();
+
+	return rc;
+}
+
+/**
+ * selinux_netlbl_inode_permission - Verify the socket is NetLabel labeled
+ * @inode: the file descriptor's inode
+ * @mask: the permission mask
+ *
+ * Description:
+ * Looks at a file's inode and if it is marked as a socket protected by
+ * NetLabel then verify that the socket has been labeled, if not try to label
+ * the socket now with the inode's SID.  Returns zero on success, negative
+ * values on failure.
+ *
+ */
+int selinux_netlbl_inode_permission(struct inode *inode, int mask)
+{
+	int rc;
+	struct sk_security_struct *sksec;
+	struct socket *sock;
+
+	if (!S_ISSOCK(inode->i_mode) ||
+	    ((mask & (MAY_WRITE | MAY_APPEND)) == 0))
+		return 0;
+	sock = SOCKET_I(inode);
+	sksec = sock->sk->sk_security;
+
+	rcu_read_lock();
+	if (sksec->nlbl_state != NLBL_REQUIRE) {
+		rcu_read_unlock();
+		return 0;
+	}
+	local_bh_disable();
+	bh_lock_sock_nested(sock->sk);
+	rc = selinux_netlbl_socket_setsid(sock, sksec->sid);
+	bh_unlock_sock(sock->sk);
+	local_bh_enable();
+	rcu_read_unlock();
+
+	return rc;
+}
+
+/**
+ * selinux_netlbl_sock_rcv_skb - Do an inbound access check using NetLabel
+ * @sksec: the sock's sk_security_struct
+ * @skb: the packet
+ * @ad: the audit data
+ *
+ * Description:
+ * Fetch the NetLabel security attributes from @skb and perform an access check
+ * against the receiving socket.  Returns zero on success, negative values on
+ * error.
+ *
+ */
+int selinux_netlbl_sock_rcv_skb(struct sk_security_struct *sksec,
+				struct sk_buff *skb,
+				struct avc_audit_data *ad)
+{
+	int rc;
+	u32 netlbl_sid;
+	u32 recv_perm;
+
+	rc = selinux_netlbl_skbuff_getsid(skb,
+					  SECINITSID_UNLABELED,
+					  &netlbl_sid);
+	if (rc != 0)
+		return rc;
+
+	if (netlbl_sid == SECSID_NULL)
+		return 0;
+
+	switch (sksec->sclass) {
+	case SECCLASS_UDP_SOCKET:
+		recv_perm = UDP_SOCKET__RECVFROM;
+		break;
+	case SECCLASS_TCP_SOCKET:
+		recv_perm = TCP_SOCKET__RECVFROM;
+		break;
+	default:
+		recv_perm = RAWIP_SOCKET__RECVFROM;
+	}
+
+	rc = avc_has_perm(sksec->sid,
+			  netlbl_sid,
+			  sksec->sclass,
+			  recv_perm,
+			  ad);
+	if (rc == 0)
+		return 0;
+
+	netlbl_skbuff_err(skb, rc);
+	return rc;
+}
+
+/**
+ * selinux_netlbl_socket_setsockopt - Do not allow users to remove a NetLabel
+ * @sock: the socket
+ * @level: the socket level or protocol
+ * @optname: the socket option name
+ *
+ * Description:
+ * Check the setsockopt() call and if the user is trying to replace the IP
+ * options on a socket and a NetLabel is in place for the socket deny the
+ * access; otherwise allow the access.  Returns zero when the access is
+ * allowed, -EACCES when denied, and other negative values on error.
+ *
+ */
+int selinux_netlbl_socket_setsockopt(struct socket *sock,
+				     int level,
+				     int optname)
+{
+	int rc = 0;
+	struct sk_security_struct *sksec = sock->sk->sk_security;
+	struct netlbl_lsm_secattr secattr;
+
+	rcu_read_lock();
+	if (level == IPPROTO_IP && optname == IP_OPTIONS &&
+	    sksec->nlbl_state == NLBL_LABELED) {
+		netlbl_secattr_init(&secattr);
+		rc = netlbl_socket_getattr(sock, &secattr);
+		if (rc == 0 && secattr.flags != NETLBL_SECATTR_NONE)
+			rc = -EACCES;
+		netlbl_secattr_destroy(&secattr);
+	}
+	rcu_read_unlock();
+
+	return rc;
+}

security/selinux/selinuxfs.c

@@ -96,12 +96,18 @@ enum sel_inos {
 	SEL_COMMIT_BOOLS, /* commit new boolean values */
 	SEL_MLS,	/* return if MLS policy is enabled */
 	SEL_DISABLE,	/* disable SELinux until next reboot */
-	SEL_AVC,	/* AVC management directory */
 	SEL_MEMBER,	/* compute polyinstantiation membership decision */
 	SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */
 	SEL_COMPAT_NET,	/* whether to use old compat network packet controls */
+	SEL_INO_NEXT,	/* The next inode number to use */
 };
 
+static unsigned long sel_last_ino = SEL_INO_NEXT - 1;
+
+#define SEL_INITCON_INO_OFFSET 	0x01000000
+#define SEL_BOOL_INO_OFFSET	0x02000000
+#define SEL_INO_MASK		0x00ffffff
+
 #define TMPBUFLEN	12
 static ssize_t sel_read_enforce(struct file *filp, char __user *buf,
 				size_t count, loff_t *ppos)
@@ -777,8 +783,6 @@ static struct inode *sel_make_inode(struct super_block *sb, int mode)
 	return ret;
 }
 
-#define BOOL_INO_OFFSET 30
-
 static ssize_t sel_read_bool(struct file *filep, char __user *buf,
 			     size_t count, loff_t *ppos)
 {
@@ -806,14 +810,14 @@ static ssize_t sel_read_bool(struct file *filep, char __user *buf,
 	}
 
 	inode = filep->f_path.dentry->d_inode;
-	cur_enforcing = security_get_bool_value(inode->i_ino - BOOL_INO_OFFSET);
+	cur_enforcing = security_get_bool_value(inode->i_ino&SEL_INO_MASK);
 	if (cur_enforcing < 0) {
 		ret = cur_enforcing;
 		goto out;
 	}
 
 	length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing,
-			  bool_pending_values[inode->i_ino - BOOL_INO_OFFSET]);
+			  bool_pending_values[inode->i_ino&SEL_INO_MASK]);
 	ret = simple_read_from_buffer(buf, count, ppos, page, length);
 out:
 	mutex_unlock(&sel_mutex);
@@ -865,7 +869,7 @@ static ssize_t sel_write_bool(struct file *filep, const char __user *buf,
 		new_value = 1;
 
 	inode = filep->f_path.dentry->d_inode;
-	bool_pending_values[inode->i_ino - BOOL_INO_OFFSET] = new_value;
+	bool_pending_values[inode->i_ino&SEL_INO_MASK] = new_value;
 	length = count;
 
 out:
@@ -1029,7 +1033,7 @@ static int sel_make_bools(void)
 		isec->sid = sid;
 		isec->initialized = 1;
 		inode->i_fop = &sel_bool_ops;
-		inode->i_ino = i + BOOL_INO_OFFSET;
+		inode->i_ino = i|SEL_BOOL_INO_OFFSET;
 		d_add(dentry, inode);
 	}
 	bool_num = num;
@@ -1234,6 +1238,56 @@ static int sel_make_avc_files(struct dentry *dir)
 			goto out;
 		}
 		inode->i_fop = files[i].ops;
+		inode->i_ino = ++sel_last_ino;
+		d_add(dentry, inode);
+	}
+out:
+	return ret;
+}
+
+static ssize_t sel_read_initcon(struct file * file, char __user *buf,
+				size_t count, loff_t *ppos)
+{
+	struct inode *inode;
+	char *con;
+	u32 sid, len;
+	ssize_t ret;
+
+	inode = file->f_path.dentry->d_inode;
+	sid = inode->i_ino&SEL_INO_MASK;
+	ret = security_sid_to_context(sid, &con, &len);
+	if (ret < 0)
+		return ret;
+
+	ret = simple_read_from_buffer(buf, count, ppos, con, len);
+	kfree(con);
+	return ret;
+}
+
+static const struct file_operations sel_initcon_ops = {
+	.read		= sel_read_initcon,
+};
+
+static int sel_make_initcon_files(struct dentry *dir)
+{
+	int i, ret = 0;
+
+	for (i = 1; i <= SECINITSID_NUM; i++) {
+		struct inode *inode;
+		struct dentry *dentry;
+		dentry = d_alloc_name(dir, security_get_initial_sid_context(i));
+		if (!dentry) {
+			ret = -ENOMEM;
+			goto out;
+		}
+
+		inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO);
+		if (!inode) {
+			ret = -ENOMEM;
+			goto out;
+		}
+		inode->i_fop = &sel_initcon_ops;
+		inode->i_ino = i|SEL_INITCON_INO_OFFSET;
 		d_add(dentry, inode);
 	}
 out:
@@ -1252,6 +1306,7 @@ static int sel_make_dir(struct inode *dir, struct dentry *dentry)
 	}
 	inode->i_op = &simple_dir_inode_operations;
 	inode->i_fop = &simple_dir_operations;
+	inode->i_ino = ++sel_last_ino;
 	/* directory inodes start off with i_nlink == 2 (for "." entry) */
 	inc_nlink(inode);
 	d_add(dentry, inode);
@@ -1314,6 +1369,7 @@ static int sel_fill_super(struct super_block * sb, void * data, int silent)
 		ret = -ENOMEM;
 		goto err;
 	}
+	inode->i_ino = ++sel_last_ino;
 	isec = (struct inode_security_struct*)inode->i_security;
 	isec->sid = SECINITSID_DEVNULL;
 	isec->sclass = SECCLASS_CHR_FILE;
@@ -1336,6 +1392,21 @@ static int sel_fill_super(struct super_block * sb, void * data, int silent)
 	ret = sel_make_avc_files(dentry);
 	if (ret)
 		goto err;
+
+	dentry = d_alloc_name(sb->s_root, "initial_contexts");
+	if (!dentry) {
+		ret = -ENOMEM;
+		goto err;
+	}
+
+	ret = sel_make_dir(root_inode, dentry);
+	if (ret)
+		goto err;
+
+	ret = sel_make_initcon_files(dentry);
+	if (ret)
+		goto err;
+
 out:
 	return ret;
 err: