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authorDavid Howells <dhowells@redhat.com>2006-12-05 14:37:56 +0000
committerDavid Howells <dhowells@warthog.cambridge.redhat.com>2006-12-05 14:37:56 +0000
commit4c1ac1b49122b805adfa4efc620592f68dccf5db (patch)
tree87557f4bc2fd4fe65b7570489c2f610c45c0adcd /security/selinux
parentc4028958b6ecad064b1a6303a6a5906d4fe48d73 (diff)
parentd916faace3efc0bf19fe9a615a1ab8fa1a24cd93 (diff)
downloadlinux-2.6.34-ux500-4c1ac1b49122b805adfa4efc620592f68dccf5db.tar.gz
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts: drivers/infiniband/core/iwcm.c drivers/net/chelsio/cxgb2.c drivers/net/wireless/bcm43xx/bcm43xx_main.c drivers/net/wireless/prism54/islpci_eth.c drivers/usb/core/hub.h drivers/usb/input/hid-core.c net/core/netpoll.c Fix up merge failures with Linus's head and fix new compilation failures. Signed-Off-By: David Howells <dhowells@redhat.com>
Diffstat (limited to 'security/selinux')
-rw-r--r--security/selinux/avc.c23
-rw-r--r--security/selinux/hooks.c155
-rw-r--r--security/selinux/include/av_inherit.h1
-rw-r--r--security/selinux/include/av_perm_to_string.h8
-rw-r--r--security/selinux/include/av_permissions.h32
-rw-r--r--security/selinux/include/avc_ss.h24
-rw-r--r--security/selinux/include/class_to_string.h2
-rw-r--r--security/selinux/include/flask.h2
-rw-r--r--security/selinux/include/objsec.h2
-rw-r--r--security/selinux/include/security.h4
-rw-r--r--security/selinux/include/selinux_netlabel.h43
-rw-r--r--security/selinux/include/xfrm.h28
-rw-r--r--security/selinux/nlmsgtab.c1
-rw-r--r--security/selinux/ss/ebitmap.c198
-rw-r--r--security/selinux/ss/ebitmap.h26
-rw-r--r--security/selinux/ss/hashtab.c6
-rw-r--r--security/selinux/ss/hashtab.h10
-rw-r--r--security/selinux/ss/mls.c156
-rw-r--r--security/selinux/ss/mls.h46
-rw-r--r--security/selinux/ss/policydb.c6
-rw-r--r--security/selinux/ss/services.c437
-rw-r--r--security/selinux/ss/symtab.c8
-rw-r--r--security/selinux/xfrm.c207
23 files changed, 722 insertions, 703 deletions
diff --git a/security/selinux/avc.c b/security/selinux/avc.c
index a300702da52..74c0319c417 100644
--- a/security/selinux/avc.c
+++ b/security/selinux/avc.c
@@ -32,12 +32,7 @@
#include "avc.h"
#include "avc_ss.h"
-static const struct av_perm_to_string
-{
- u16 tclass;
- u32 value;
- const char *name;
-} av_perm_to_string[] = {
+static const struct av_perm_to_string av_perm_to_string[] = {
#define S_(c, v, s) { c, v, s },
#include "av_perm_to_string.h"
#undef S_
@@ -57,17 +52,21 @@ static const char *class_to_string[] = {
#undef TE_
#undef S_
-static const struct av_inherit
-{
- u16 tclass;
- const char **common_pts;
- u32 common_base;
-} av_inherit[] = {
+static const struct av_inherit av_inherit[] = {
#define S_(c, i, b) { c, common_##i##_perm_to_string, b },
#include "av_inherit.h"
#undef S_
};
+const struct selinux_class_perm selinux_class_perm = {
+ av_perm_to_string,
+ ARRAY_SIZE(av_perm_to_string),
+ class_to_string,
+ ARRAY_SIZE(class_to_string),
+ av_inherit,
+ ARRAY_SIZE(av_inherit)
+};
+
#define AVC_CACHE_SLOTS 512
#define AVC_DEF_CACHE_THRESHOLD 512
#define AVC_CACHE_RECLAIM 16
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 8ab5679a37a..a29d78d3f44 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -58,6 +58,7 @@
#include <linux/netlink.h>
#include <linux/tcp.h>
#include <linux/udp.h>
+#include <linux/dccp.h>
#include <linux/quota.h>
#include <linux/un.h> /* for Unix socket types */
#include <net/af_unix.h> /* for Unix socket types */
@@ -751,6 +752,8 @@ static inline u16 socket_type_to_security_class(int family, int type, int protoc
return SECCLASS_UDP_SOCKET;
else
return SECCLASS_RAWIP_SOCKET;
+ case SOCK_DCCP:
+ return SECCLASS_DCCP_SOCKET;
default:
return SECCLASS_RAWIP_SOCKET;
}
@@ -1754,7 +1757,8 @@ static inline void flush_unauthorized_files(struct files_struct * files)
get_file(devnull);
} else {
devnull = dentry_open(dget(selinux_null), mntget(selinuxfs_mount), O_RDWR);
- if (!devnull) {
+ if (IS_ERR(devnull)) {
+ devnull = NULL;
put_unused_fd(fd);
fput(file);
continue;
@@ -2888,7 +2892,8 @@ static void selinux_task_to_inode(struct task_struct *p,
}
/* Returns error only if unable to parse addresses */
-static int selinux_parse_skb_ipv4(struct sk_buff *skb, struct avc_audit_data *ad)
+static int selinux_parse_skb_ipv4(struct sk_buff *skb,
+ struct avc_audit_data *ad, u8 *proto)
{
int offset, ihlen, ret = -EINVAL;
struct iphdr _iph, *ih;
@@ -2906,6 +2911,9 @@ static int selinux_parse_skb_ipv4(struct sk_buff *skb, struct avc_audit_data *ad
ad->u.net.v4info.daddr = ih->daddr;
ret = 0;
+ if (proto)
+ *proto = ih->protocol;
+
switch (ih->protocol) {
case IPPROTO_TCP: {
struct tcphdr _tcph, *th;
@@ -2939,6 +2947,22 @@ static int selinux_parse_skb_ipv4(struct sk_buff *skb, struct avc_audit_data *ad
break;
}
+ case IPPROTO_DCCP: {
+ struct dccp_hdr _dccph, *dh;
+
+ if (ntohs(ih->frag_off) & IP_OFFSET)
+ break;
+
+ offset += ihlen;
+ dh = skb_header_pointer(skb, offset, sizeof(_dccph), &_dccph);
+ if (dh == NULL)
+ break;
+
+ ad->u.net.sport = dh->dccph_sport;
+ ad->u.net.dport = dh->dccph_dport;
+ break;
+ }
+
default:
break;
}
@@ -2949,7 +2973,8 @@ out:
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
/* Returns error only if unable to parse addresses */
-static int selinux_parse_skb_ipv6(struct sk_buff *skb, struct avc_audit_data *ad)
+static int selinux_parse_skb_ipv6(struct sk_buff *skb,
+ struct avc_audit_data *ad, u8 *proto)
{
u8 nexthdr;
int ret = -EINVAL, offset;
@@ -2970,6 +2995,9 @@ static int selinux_parse_skb_ipv6(struct sk_buff *skb, struct avc_audit_data *ad
if (offset < 0)
goto out;
+ if (proto)
+ *proto = nexthdr;
+
switch (nexthdr) {
case IPPROTO_TCP: {
struct tcphdr _tcph, *th;
@@ -2995,6 +3023,18 @@ static int selinux_parse_skb_ipv6(struct sk_buff *skb, struct avc_audit_data *ad
break;
}
+ case IPPROTO_DCCP: {
+ struct dccp_hdr _dccph, *dh;
+
+ dh = skb_header_pointer(skb, offset, sizeof(_dccph), &_dccph);
+ if (dh == NULL)
+ break;
+
+ ad->u.net.sport = dh->dccph_sport;
+ ad->u.net.dport = dh->dccph_dport;
+ break;
+ }
+
/* includes fragments */
default:
break;
@@ -3006,13 +3046,13 @@ out:
#endif /* IPV6 */
static int selinux_parse_skb(struct sk_buff *skb, struct avc_audit_data *ad,
- char **addrp, int *len, int src)
+ char **addrp, int *len, int src, u8 *proto)
{
int ret = 0;
switch (ad->u.net.family) {
case PF_INET:
- ret = selinux_parse_skb_ipv4(skb, ad);
+ ret = selinux_parse_skb_ipv4(skb, ad, proto);
if (ret || !addrp)
break;
*len = 4;
@@ -3022,7 +3062,7 @@ static int selinux_parse_skb(struct sk_buff *skb, struct avc_audit_data *ad,
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
case PF_INET6:
- ret = selinux_parse_skb_ipv6(skb, ad);
+ ret = selinux_parse_skb_ipv6(skb, ad, proto);
if (ret || !addrp)
break;
*len = 16;
@@ -3100,9 +3140,7 @@ static int selinux_socket_post_create(struct socket *sock, int family,
if (sock->sk) {
sksec = sock->sk->sk_security;
sksec->sid = isec->sid;
- err = selinux_netlbl_socket_post_create(sock,
- family,
- isec->sid);
+ err = selinux_netlbl_socket_post_create(sock);
}
return err;
@@ -3179,7 +3217,11 @@ static int selinux_socket_bind(struct socket *sock, struct sockaddr *address, in
case SECCLASS_UDP_SOCKET:
node_perm = UDP_SOCKET__NODE_BIND;
break;
-
+
+ case SECCLASS_DCCP_SOCKET:
+ node_perm = DCCP_SOCKET__NODE_BIND;
+ break;
+
default:
node_perm = RAWIP_SOCKET__NODE_BIND;
break;
@@ -3217,16 +3259,17 @@ static int selinux_socket_connect(struct socket *sock, struct sockaddr *address,
return err;
/*
- * If a TCP socket, check name_connect permission for the port.
+ * If a TCP or DCCP socket, check name_connect permission for the port.
*/
isec = SOCK_INODE(sock)->i_security;
- if (isec->sclass == SECCLASS_TCP_SOCKET) {
+ if (isec->sclass == SECCLASS_TCP_SOCKET ||
+ isec->sclass == SECCLASS_DCCP_SOCKET) {
struct sock *sk = sock->sk;
struct avc_audit_data ad;
struct sockaddr_in *addr4 = NULL;
struct sockaddr_in6 *addr6 = NULL;
unsigned short snum;
- u32 sid;
+ u32 sid, perm;
if (sk->sk_family == PF_INET) {
addr4 = (struct sockaddr_in *)address;
@@ -3245,11 +3288,13 @@ static int selinux_socket_connect(struct socket *sock, struct sockaddr *address,
if (err)
goto out;
+ perm = (isec->sclass == SECCLASS_TCP_SOCKET) ?
+ TCP_SOCKET__NAME_CONNECT : DCCP_SOCKET__NAME_CONNECT;
+
AVC_AUDIT_DATA_INIT(&ad,NET);
ad.u.net.dport = htons(snum);
ad.u.net.family = sk->sk_family;
- err = avc_has_perm(isec->sid, sid, isec->sclass,
- TCP_SOCKET__NAME_CONNECT, &ad);
+ err = avc_has_perm(isec->sid, sid, isec->sclass, perm, &ad);
if (err)
goto out;
}
@@ -3437,7 +3482,13 @@ static int selinux_sock_rcv_skb_compat(struct sock *sk, struct sk_buff *skb,
node_perm = NODE__TCP_RECV;
recv_perm = TCP_SOCKET__RECV_MSG;
break;
-
+
+ case SECCLASS_DCCP_SOCKET:
+ netif_perm = NETIF__DCCP_RECV;
+ node_perm = NODE__DCCP_RECV;
+ recv_perm = DCCP_SOCKET__RECV_MSG;
+ break;
+
default:
netif_perm = NETIF__RAWIP_RECV;
node_perm = NODE__RAWIP_RECV;
@@ -3493,7 +3544,7 @@ static int selinux_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
ad.u.net.netif = skb->dev ? skb->dev->name : "[unknown]";
ad.u.net.family = family;
- err = selinux_parse_skb(skb, &ad, &addrp, &len, 1);
+ err = selinux_parse_skb(skb, &ad, &addrp, &len, 1, NULL);
if (err)
goto out;
@@ -3523,25 +3574,16 @@ static int selinux_socket_getpeersec_stream(struct socket *sock, char __user *op
u32 scontext_len;
struct sk_security_struct *ssec;
struct inode_security_struct *isec;
- u32 peer_sid = 0;
+ u32 peer_sid = SECSID_NULL;
isec = SOCK_INODE(sock)->i_security;
- /* if UNIX_STREAM check peer_sid, if TCP check dst for labelled sa */
- if (isec->sclass == SECCLASS_UNIX_STREAM_SOCKET) {
+ if (isec->sclass == SECCLASS_UNIX_STREAM_SOCKET ||
+ isec->sclass == SECCLASS_TCP_SOCKET) {
ssec = sock->sk->sk_security;
peer_sid = ssec->peer_sid;
}
- else if (isec->sclass == SECCLASS_TCP_SOCKET) {
- peer_sid = selinux_netlbl_socket_getpeersec_stream(sock);
- if (peer_sid == SECSID_NULL)
- peer_sid = selinux_socket_getpeer_stream(sock->sk);
- if (peer_sid == SECSID_NULL) {
- err = -ENOPROTOOPT;
- goto out;
- }
- }
- else {
+ if (peer_sid == SECSID_NULL) {
err = -ENOPROTOOPT;
goto out;
}
@@ -3573,13 +3615,12 @@ static int selinux_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *
u32 peer_secid = SECSID_NULL;
int err = 0;
- if (sock && (sock->sk->sk_family == PF_UNIX))
+ if (sock && sock->sk->sk_family == PF_UNIX)
selinux_get_inode_sid(SOCK_INODE(sock), &peer_secid);
- else if (skb) {
- peer_secid = selinux_netlbl_socket_getpeersec_dgram(skb);
- if (peer_secid == SECSID_NULL)
- peer_secid = selinux_socket_getpeer_dgram(skb);
- }
+ else if (skb)
+ security_skb_extlbl_sid(skb,
+ SECINITSID_UNLABELED,
+ &peer_secid);
if (peer_secid == SECSID_NULL)
err = -EINVAL;
@@ -3606,7 +3647,7 @@ static void selinux_sk_clone_security(const struct sock *sk, struct sock *newsk)
newssec->sid = ssec->sid;
newssec->peer_sid = ssec->peer_sid;
- selinux_netlbl_sk_clone_security(ssec, newssec);
+ selinux_netlbl_sk_security_clone(ssec, newssec);
}
static void selinux_sk_getsecid(struct sock *sk, u32 *secid)
@@ -3640,17 +3681,10 @@ static int selinux_inet_conn_request(struct sock *sk, struct sk_buff *skb,
u32 newsid;
u32 peersid;
- newsid = selinux_netlbl_inet_conn_request(skb, sksec->sid);
- if (newsid != SECSID_NULL) {
- req->secid = newsid;
- return 0;
- }
-
- err = selinux_xfrm_decode_session(skb, &peersid, 0);
- BUG_ON(err);
-
+ security_skb_extlbl_sid(skb, SECINITSID_UNLABELED, &peersid);
if (peersid == SECSID_NULL) {
req->secid = sksec->sid;
+ req->peer_secid = SECSID_NULL;
return 0;
}
@@ -3659,6 +3693,7 @@ static int selinux_inet_conn_request(struct sock *sk, struct sk_buff *skb,
return err;
req->secid = newsid;
+ req->peer_secid = peersid;
return 0;
}
@@ -3668,12 +3703,23 @@ static void selinux_inet_csk_clone(struct sock *newsk,
struct sk_security_struct *newsksec = newsk->sk_security;
newsksec->sid = req->secid;
+ newsksec->peer_sid = req->peer_secid;
/* NOTE: Ideally, we should also get the isec->sid for the
new socket in sync, but we don't have the isec available yet.
So we will wait until sock_graft to do it, by which
time it will have been created and available. */
- selinux_netlbl_sk_security_init(newsksec, req->rsk_ops->family);
+ /* We don't need to take any sort of lock here as we are the only
+ * thread with access to newsksec */
+ selinux_netlbl_sk_security_reset(newsksec, req->rsk_ops->family);
+}
+
+static void selinux_inet_conn_established(struct sock *sk,
+ struct sk_buff *skb)
+{
+ struct sk_security_struct *sksec = sk->sk_security;
+
+ security_skb_extlbl_sid(skb, SECINITSID_UNLABELED, &sksec->peer_sid);
}
static void selinux_req_classify_flow(const struct request_sock *req,
@@ -3756,7 +3802,13 @@ static int selinux_ip_postroute_last_compat(struct sock *sk, struct net_device *
node_perm = NODE__TCP_SEND;
send_perm = TCP_SOCKET__SEND_MSG;
break;
-
+
+ case SECCLASS_DCCP_SOCKET:
+ netif_perm = NETIF__DCCP_SEND;
+ node_perm = NODE__DCCP_SEND;
+ send_perm = DCCP_SOCKET__SEND_MSG;
+ break;
+
default:
netif_perm = NETIF__RAWIP_SEND;
node_perm = NODE__RAWIP_SEND;
@@ -3807,6 +3859,7 @@ static unsigned int selinux_ip_postroute_last(unsigned int hooknum,
struct avc_audit_data ad;
struct net_device *dev = (struct net_device *)out;
struct sk_security_struct *sksec;
+ u8 proto;
sk = skb->sk;
if (!sk)
@@ -3818,7 +3871,7 @@ static unsigned int selinux_ip_postroute_last(unsigned int hooknum,
ad.u.net.netif = dev->name;
ad.u.net.family = family;
- err = selinux_parse_skb(skb, &ad, &addrp, &len, 0);
+ err = selinux_parse_skb(skb, &ad, &addrp, &len, 0, &proto);
if (err)
goto out;
@@ -3832,7 +3885,7 @@ static unsigned int selinux_ip_postroute_last(unsigned int hooknum,
if (err)
goto out;
- err = selinux_xfrm_postroute_last(sksec->sid, skb, &ad);
+ err = selinux_xfrm_postroute_last(sksec->sid, skb, &ad, proto);
out:
return err ? NF_DROP : NF_ACCEPT;
}
@@ -4738,6 +4791,7 @@ static struct security_operations selinux_ops = {
.sock_graft = selinux_sock_graft,
.inet_conn_request = selinux_inet_conn_request,
.inet_csk_clone = selinux_inet_csk_clone,
+ .inet_conn_established = selinux_inet_conn_established,
.req_classify_flow = selinux_req_classify_flow,
#ifdef CONFIG_SECURITY_NETWORK_XFRM
@@ -4750,7 +4804,6 @@ static struct security_operations selinux_ops = {
.xfrm_state_delete_security = selinux_xfrm_state_delete,
.xfrm_policy_lookup = selinux_xfrm_policy_lookup,
.xfrm_state_pol_flow_match = selinux_xfrm_state_pol_flow_match,
- .xfrm_flow_state_match = selinux_xfrm_flow_state_match,
.xfrm_decode_session = selinux_xfrm_decode_session,
#endif
diff --git a/security/selinux/include/av_inherit.h b/security/selinux/include/av_inherit.h
index a68fdd55597..8377a4ba3b9 100644
--- a/security/selinux/include/av_inherit.h
+++ b/security/selinux/include/av_inherit.h
@@ -30,3 +30,4 @@
S_(SECCLASS_NETLINK_DNRT_SOCKET, socket, 0x00400000UL)
S_(SECCLASS_NETLINK_KOBJECT_UEVENT_SOCKET, socket, 0x00400000UL)
S_(SECCLASS_APPLETALK_SOCKET, socket, 0x00400000UL)
+ S_(SECCLASS_DCCP_SOCKET, socket, 0x00400000UL)
diff --git a/security/selinux/include/av_perm_to_string.h b/security/selinux/include/av_perm_to_string.h
index 09fc8a2345e..ad9fb2d69b5 100644
--- a/security/selinux/include/av_perm_to_string.h
+++ b/security/selinux/include/av_perm_to_string.h
@@ -35,12 +35,16 @@
S_(SECCLASS_NODE, NODE__RAWIP_RECV, "rawip_recv")
S_(SECCLASS_NODE, NODE__RAWIP_SEND, "rawip_send")
S_(SECCLASS_NODE, NODE__ENFORCE_DEST, "enforce_dest")
+ S_(SECCLASS_NODE, NODE__DCCP_RECV, "dccp_recv")
+ S_(SECCLASS_NODE, NODE__DCCP_SEND, "dccp_send")
S_(SECCLASS_NETIF, NETIF__TCP_RECV, "tcp_recv")
S_(SECCLASS_NETIF, NETIF__TCP_SEND, "tcp_send")
S_(SECCLASS_NETIF, NETIF__UDP_RECV, "udp_recv")
S_(SECCLASS_NETIF, NETIF__UDP_SEND, "udp_send")
S_(SECCLASS_NETIF, NETIF__RAWIP_RECV, "rawip_recv")
S_(SECCLASS_NETIF, NETIF__RAWIP_SEND, "rawip_send")
+ S_(SECCLASS_NETIF, NETIF__DCCP_RECV, "dccp_recv")
+ S_(SECCLASS_NETIF, NETIF__DCCP_SEND, "dccp_send")
S_(SECCLASS_UNIX_STREAM_SOCKET, UNIX_STREAM_SOCKET__CONNECTTO, "connectto")
S_(SECCLASS_UNIX_STREAM_SOCKET, UNIX_STREAM_SOCKET__NEWCONN, "newconn")
S_(SECCLASS_UNIX_STREAM_SOCKET, UNIX_STREAM_SOCKET__ACCEPTFROM, "acceptfrom")
@@ -252,3 +256,7 @@
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")
diff --git a/security/selinux/include/av_permissions.h b/security/selinux/include/av_permissions.h
index 81f4f526c8b..2de4b5fe3aa 100644
--- a/security/selinux/include/av_permissions.h
+++ b/security/selinux/include/av_permissions.h
@@ -312,6 +312,8 @@
#define NODE__RAWIP_RECV 0x00000010UL
#define NODE__RAWIP_SEND 0x00000020UL
#define NODE__ENFORCE_DEST 0x00000040UL
+#define NODE__DCCP_RECV 0x00000080UL
+#define NODE__DCCP_SEND 0x00000100UL
#define NETIF__TCP_RECV 0x00000001UL
#define NETIF__TCP_SEND 0x00000002UL
@@ -319,6 +321,8 @@
#define NETIF__UDP_SEND 0x00000008UL
#define NETIF__RAWIP_RECV 0x00000010UL
#define NETIF__RAWIP_SEND 0x00000020UL
+#define NETIF__DCCP_RECV 0x00000040UL
+#define NETIF__DCCP_SEND 0x00000080UL
#define NETLINK_SOCKET__IOCTL 0x00000001UL
#define NETLINK_SOCKET__READ 0x00000002UL
@@ -970,3 +974,31 @@
#define KEY__LINK 0x00000010UL
#define KEY__SETATTR 0x00000020UL
#define KEY__CREATE 0x00000040UL
+
+#define CONTEXT__TRANSLATE 0x00000001UL
+#define CONTEXT__CONTAINS 0x00000002UL
+
+#define DCCP_SOCKET__IOCTL 0x00000001UL
+#define DCCP_SOCKET__READ 0x00000002UL
+#define DCCP_SOCKET__WRITE 0x00000004UL
+#define DCCP_SOCKET__CREATE 0x00000008UL
+#define DCCP_SOCKET__GETATTR 0x00000010UL
+#define DCCP_SOCKET__SETATTR 0x00000020UL
+#define DCCP_SOCKET__LOCK 0x00000040UL
+#define DCCP_SOCKET__RELABELFROM 0x00000080UL
+#define DCCP_SOCKET__RELABELTO 0x00000100UL
+#define DCCP_SOCKET__APPEND 0x00000200UL
+#define DCCP_SOCKET__BIND 0x00000400UL
+#define DCCP_SOCKET__CONNECT 0x00000800UL
+#define DCCP_SOCKET__LISTEN 0x00001000UL
+#define DCCP_SOCKET__ACCEPT 0x00002000UL
+#define DCCP_SOCKET__GETOPT 0x00004000UL
+#define DCCP_SOCKET__SETOPT 0x00008000UL
+#define DCCP_SOCKET__SHUTDOWN 0x00010000UL
+#define DCCP_SOCKET__RECVFROM 0x00020000UL
+#define DCCP_SOCKET__SENDTO 0x00040000UL
+#define DCCP_SOCKET__RECV_MSG 0x00080000UL
+#define DCCP_SOCKET__SEND_MSG 0x00100000UL
+#define DCCP_SOCKET__NAME_BIND 0x00200000UL
+#define DCCP_SOCKET__NODE_BIND 0x00400000UL
+#define DCCP_SOCKET__NAME_CONNECT 0x00800000UL
diff --git a/security/selinux/include/avc_ss.h b/security/selinux/include/avc_ss.h
index 450a2831e2e..ff869e8b6f4 100644
--- a/security/selinux/include/avc_ss.h
+++ b/security/selinux/include/avc_ss.h
@@ -10,5 +10,29 @@
int avc_ss_reset(u32 seqno);
+struct av_perm_to_string
+{
+ u16 tclass;
+ u32 value;
+ const char *name;
+};
+
+struct av_inherit
+{
+ u16 tclass;
+ const char **common_pts;
+ u32 common_base;
+};
+
+struct selinux_class_perm
+{
+ const struct av_perm_to_string *av_perm_to_string;
+ u32 av_pts_len;
+ const char **class_to_string;
+ u32 cts_len;
+ const struct av_inherit *av_inherit;
+ u32 av_inherit_len;
+};
+
#endif /* _SELINUX_AVC_SS_H_ */
diff --git a/security/selinux/include/class_to_string.h b/security/selinux/include/class_to_string.h
index 24303b61309..9f3ebb1bfae 100644
--- a/security/selinux/include/class_to_string.h
+++ b/security/selinux/include/class_to_string.h
@@ -61,3 +61,5 @@
S_("appletalk_socket")
S_("packet")
S_("key")
+ S_("context")
+ S_("dccp_socket")
diff --git a/security/selinux/include/flask.h b/security/selinux/include/flask.h
index 95887aed2a6..67cef371ee0 100644
--- a/security/selinux/include/flask.h
+++ b/security/selinux/include/flask.h
@@ -63,6 +63,8 @@
#define SECCLASS_APPLETALK_SOCKET 56
#define SECCLASS_PACKET 57
#define SECCLASS_KEY 58
+#define SECCLASS_CONTEXT 59
+#define SECCLASS_DCCP_SOCKET 60
/*
* Security identifier indices for initial entities
diff --git a/security/selinux/include/objsec.h b/security/selinux/include/objsec.h
index ef2267fea8b..91b88f0ba20 100644
--- a/security/selinux/include/objsec.h
+++ b/security/selinux/include/objsec.h
@@ -23,6 +23,7 @@
#include <linux/fs.h>
#include <linux/binfmts.h>
#include <linux/in.h>
+#include <linux/spinlock.h>
#include "flask.h"
#include "avc.h"
@@ -108,6 +109,7 @@ struct sk_security_struct {
NLBL_REQUIRE,
NLBL_LABELED,
} nlbl_state;
+ spinlock_t nlbl_lock; /* protects nlbl_state */
#endif
};
diff --git a/security/selinux/include/security.h b/security/selinux/include/security.h
index 1ef79172cc8..210eec77e7f 100644
--- a/security/selinux/include/security.h
+++ b/security/selinux/include/security.h
@@ -34,6 +34,8 @@
#define POLICYDB_VERSION_MAX POLICYDB_VERSION_RANGETRANS
#endif
+struct sk_buff;
+
extern int selinux_enabled;
extern int selinux_mls_enabled;
@@ -80,6 +82,8 @@ 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);
diff --git a/security/selinux/include/selinux_netlabel.h b/security/selinux/include/selinux_netlabel.h
index 9de10cc2cef..2a732c9033e 100644
--- a/security/selinux/include/selinux_netlabel.h
+++ b/security/selinux/include/selinux_netlabel.h
@@ -38,19 +38,17 @@
#ifdef CONFIG_NETLABEL
void selinux_netlbl_cache_invalidate(void);
-int selinux_netlbl_socket_post_create(struct socket *sock,
- int sock_family,
- u32 sid);
+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);
-u32 selinux_netlbl_inet_conn_request(struct sk_buff *skb, u32 sock_sid);
int selinux_netlbl_sock_rcv_skb(struct sk_security_struct *sksec,
struct sk_buff *skb,
struct avc_audit_data *ad);
-u32 selinux_netlbl_socket_getpeersec_stream(struct socket *sock);
-u32 selinux_netlbl_socket_getpeersec_dgram(struct sk_buff *skb);
+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_clone_security(struct sk_security_struct *ssec,
+void selinux_netlbl_sk_security_clone(struct sk_security_struct *ssec,
struct sk_security_struct *newssec);
int selinux_netlbl_inode_permission(struct inode *inode, int mask);
int selinux_netlbl_socket_setsockopt(struct socket *sock,
@@ -62,23 +60,23 @@ static inline void selinux_netlbl_cache_invalidate(void)
return;
}
-static inline int selinux_netlbl_socket_post_create(struct socket *sock,
- int sock_family,
- u32 sid)
+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)
+static inline int selinux_netlbl_socket_post_create(struct socket *sock)
{
- return;
+ return 0;
}
-static inline u32 selinux_netlbl_inet_conn_request(struct sk_buff *skb,
- u32 sock_sid)
+static inline void selinux_netlbl_sock_graft(struct sock *sk,
+ struct socket *sock)
{
- return SECSID_NULL;
+ return;
}
static inline int selinux_netlbl_sock_rcv_skb(struct sk_security_struct *sksec,
@@ -88,14 +86,11 @@ static inline int selinux_netlbl_sock_rcv_skb(struct sk_security_struct *sksec,
return 0;
}
-static inline u32 selinux_netlbl_socket_getpeersec_stream(struct socket *sock)
-{
- return SECSID_NULL;
-}
-
-static inline u32 selinux_netlbl_socket_getpeersec_dgram(struct sk_buff *skb)
+static inline void selinux_netlbl_sk_security_reset(
+ struct sk_security_struct *ssec,
+ int family)
{
- return SECSID_NULL;
+ return;
}
static inline void selinux_netlbl_sk_security_init(
@@ -105,7 +100,7 @@ static inline void selinux_netlbl_sk_security_init(
return;
}
-static inline void selinux_netlbl_sk_clone_security(
+static inline void selinux_netlbl_sk_security_clone(
struct sk_security_struct *ssec,
struct sk_security_struct *newssec)
{
diff --git a/security/selinux/include/xfrm.h b/security/selinux/include/xfrm.h
index 526b28019ac..161eb571c82 100644
--- a/security/selinux/include/xfrm.h
+++ b/security/selinux/include/xfrm.h
@@ -8,20 +8,17 @@
#define _SELINUX_XFRM_H_
int selinux_xfrm_policy_alloc(struct xfrm_policy *xp,
- struct xfrm_user_sec_ctx *sec_ctx, struct sock *sk);
+ struct xfrm_user_sec_ctx *sec_ctx);
int selinux_xfrm_policy_clone(struct xfrm_policy *old, struct xfrm_policy *new);
void selinux_xfrm_policy_free(struct xfrm_policy *xp);
int selinux_xfrm_policy_delete(struct xfrm_policy *xp);
int selinux_xfrm_state_alloc(struct xfrm_state *x,
- struct xfrm_user_sec_ctx *sec_ctx, struct xfrm_sec_ctx *pol, u32 secid);
+ struct xfrm_user_sec_ctx *sec_ctx, u32 secid);
void selinux_xfrm_state_free(struct xfrm_state *x);
int selinux_xfrm_state_delete(struct xfrm_state *x);
int selinux_xfrm_policy_lookup(struct xfrm_policy *xp, u32 fl_secid, u8 dir);
int selinux_xfrm_state_pol_flow_match(struct xfrm_state *x,
struct xfrm_policy *xp, struct flowi *fl);
-int selinux_xfrm_flow_state_match(struct flowi *fl, struct xfrm_state *xfrm,
- struct xfrm_policy *xp);
-
/*
* Extract the security blob from the sock (it's actually on the socket)
@@ -38,9 +35,7 @@ static inline struct inode_security_struct *get_sock_isec(struct sock *sk)
int selinux_xfrm_sock_rcv_skb(u32 sid, struct sk_buff *skb,
struct avc_audit_data *ad);
int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb,
- struct avc_audit_data *ad);
-u32 selinux_socket_getpeer_stream(struct sock *sk);
-u32 selinux_socket_getpeer_dgram(struct sk_buff *skb);
+ struct avc_audit_data *ad, u8 proto);
int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall);
#else
static inline int selinux_xfrm_sock_rcv_skb(u32 isec_sid, struct sk_buff *skb,
@@ -50,20 +45,11 @@ static inline int selinux_xfrm_sock_rcv_skb(u32 isec_sid, struct sk_buff *skb,
}
static inline int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb,
- struct avc_audit_data *ad)
+ struct avc_audit_data *ad, u8 proto)
{
return 0;
}
-static inline int selinux_socket_getpeer_stream(struct sock *sk)
-{
- return SECSID_NULL;
-}
-
-static inline int selinux_socket_getpeer_dgram(struct sk_buff *skb)
-{
- return SECSID_NULL;
-}
static inline int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall)
{
*sid = SECSID_NULL;
@@ -71,4 +57,10 @@ static inline int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int
}
#endif
+static inline void selinux_skb_xfrm_sid(struct sk_buff *skb, u32 *sid)
+{
+ int err = selinux_xfrm_decode_session(skb, sid, 0);
+ BUG_ON(err);
+}
+
#endif /* _SELINUX_XFRM_H_ */
diff --git a/security/selinux/nlmsgtab.c b/security/selinux/nlmsgtab.c
index b8f4d25cf33..ccfe8755735 100644
--- a/security/selinux/nlmsgtab.c
+++ b/security/selinux/nlmsgtab.c
@@ -60,7 +60,6 @@ static struct nlmsg_perm nlmsg_route_perms[] =
{ RTM_DELACTION, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
{ RTM_GETACTION, NETLINK_ROUTE_SOCKET__NLMSG_READ },
{ RTM_NEWPREFIX, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
- { RTM_GETPREFIX, NETLINK_ROUTE_SOCKET__NLMSG_READ },
{ RTM_GETMULTICAST, NETLINK_ROUTE_SOCKET__NLMSG_READ },
{ RTM_GETANYCAST, NETLINK_ROUTE_SOCKET__NLMSG_READ },
{ RTM_GETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_READ },
diff --git a/security/selinux/ss/ebitmap.c b/security/selinux/ss/ebitmap.c
index d539346ab3a..ce492a6b38e 100644
--- a/security/selinux/ss/ebitmap.c
+++ b/security/selinux/ss/ebitmap.c
@@ -6,7 +6,7 @@
/*
* Updated: Hewlett-Packard <paul.moore@hp.com>
*
- * Added ebitmap_export() and ebitmap_import()
+ * Added support to import/export the NetLabel category bitmap
*
* (c) Copyright Hewlett-Packard Development Company, L.P., 2006
*/
@@ -14,6 +14,7 @@
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/errno.h>
+#include <net/netlabel.h>
#include "ebitmap.h"
#include "policydb.h"
@@ -67,141 +68,120 @@ int ebitmap_cpy(struct ebitmap *dst, struct ebitmap *src)
return 0;
}
+#ifdef CONFIG_NETLABEL
/**
- * ebitmap_export - Export an ebitmap to a unsigned char bitmap string
- * @src: the ebitmap to export
- * @dst: the resulting bitmap string
- * @dst_len: length of dst in bytes
+ * ebitmap_netlbl_export - Export an ebitmap into a NetLabel category bitmap
+ * @ebmap: the ebitmap to export
+ * @catmap: the NetLabel category bitmap
*
* Description:
- * Allocate a buffer at least src->highbit bits long and export the extensible
- * bitmap into the buffer. The bitmap string will be in little endian format,
- * i.e. LSB first. The value returned in dst_len may not the true size of the
- * buffer as the length of the buffer is rounded up to a multiple of MAPTYPE.
- * The caller must free the buffer when finished. Returns zero on success,
- * negative values on failure.
+ * Export a SELinux extensibile bitmap into a NetLabel category bitmap.
+ * Returns zero on success, negative values on error.
*
*/
-int ebitmap_export(const struct ebitmap *src,
- unsigned char **dst,
- size_t *dst_len)
+int ebitmap_netlbl_export(struct ebitmap *ebmap,
+ struct netlbl_lsm_secattr_catmap **catmap)
{
- size_t bitmap_len;
- unsigned char *bitmap;
- struct ebitmap_node *iter_node;
- MAPTYPE node_val;
- size_t bitmap_byte;
- unsigned char bitmask;
-
- if (src->highbit == 0) {
- *dst = NULL;
- *dst_len = 0;
+ struct ebitmap_node *e_iter = ebmap->node;
+ struct netlbl_lsm_secattr_catmap *c_iter;
+ u32 cmap_idx;
+
+ /* This function is a much simpler because SELinux's MAPTYPE happens
+ * to be the same as NetLabel's NETLBL_CATMAP_MAPTYPE, if MAPTYPE is
+ * changed from a u64 this function will most likely need to be changed
+ * as well. It's not ideal but I think the tradeoff in terms of
+ * neatness and speed is worth it. */
+
+ if (e_iter == NULL) {
+ *catmap = NULL;
return 0;
}
- bitmap_len = src->highbit / 8;
- if (src->highbit % 7)
- bitmap_len += 1;
-
- bitmap = kzalloc((bitmap_len & ~(sizeof(MAPTYPE) - 1)) +
- sizeof(MAPTYPE),
- GFP_ATOMIC);
- if (bitmap == NULL)
+ c_iter = netlbl_secattr_catmap_alloc(GFP_ATOMIC);
+ if (c_iter == NULL)
return -ENOMEM;
+ *catmap = c_iter;
+ c_iter->startbit = e_iter->startbit & ~(NETLBL_CATMAP_SIZE - 1);
+
+ while (e_iter != NULL) {
+ if (e_iter->startbit >=
+ (c_iter->startbit + NETLBL_CATMAP_SIZE)) {
+ c_iter->next = netlbl_secattr_catmap_alloc(GFP_ATOMIC);
+ if (c_iter->next == NULL)
+ goto netlbl_export_failure;
+ c_iter = c_iter->next;
+ c_iter->startbit = e_iter->startbit &
+ ~(NETLBL_CATMAP_SIZE - 1);
+ }
+ cmap_idx = (e_iter->startbit - c_iter->startbit) /
+ NETLBL_CATMAP_MAPSIZE;
+ c_iter->bitmap[cmap_idx] = e_iter->map;
+ e_iter = e_iter->next;
+ }
- iter_node = src->node;
- do {
- bitmap_byte = iter_node->startbit / 8;
- bitmask = 0x80;
- node_val = iter_node->map;
- do {
- if (bitmask == 0) {
- bitmap_byte++;
- bitmask = 0x80;
- }
- if (node_val & (MAPTYPE)0x01)
- bitmap[bitmap_byte] |= bitmask;
- node_val >>= 1;
- bitmask >>= 1;
- } while (node_val > 0);
- iter_node = iter_node->next;
- } while (iter_node);
-
- *dst = bitmap;
- *dst_len = bitmap_len;
return 0;
+
+netlbl_export_failure:
+ netlbl_secattr_catmap_free(*catmap);
+ return -ENOMEM;
}
/**
- * ebitmap_import - Import an unsigned char bitmap string into an ebitmap
- * @src: the bitmap string
- * @src_len: the bitmap length in bytes
- * @dst: the empty ebitmap
+ * ebitmap_netlbl_import - Import a NetLabel category bitmap into an ebitmap
+ * @ebmap: the ebitmap to export
+ * @catmap: the NetLabel category bitmap
*
* Description:
- * This function takes a little endian bitmap string in src and imports it into
- * the ebitmap pointed to by dst. Returns zero on success, negative values on
- * failure.
+ * Import a NetLabel category bitmap into a SELinux extensibile bitmap.
+ * Returns zero on success, negative values on error.
*
*/
-int ebitmap_import(const unsigned char *src,
- size_t src_len,
- struct ebitmap *dst)
+int ebitmap_netlbl_import(struct ebitmap *ebmap,
+ struct netlbl_lsm_secattr_catmap *catmap)
{
- size_t src_off = 0;
- size_t node_limit;
- struct ebitmap_node *node_new;
- struct ebitmap_node *node_last = NULL;
- u32 i_byte;
- u32 i_bit;
- unsigned char src_byte;
-
- while (src_off < src_len) {
- if (src_len - src_off >= sizeof(MAPTYPE)) {
- if (*(MAPTYPE *)&src[src_off] == 0) {
- src_off += sizeof(MAPTYPE);
- continue;
- }
- node_limit = sizeof(MAPTYPE);
- } else {
- for (src_byte = 0, i_byte = src_off;
- i_byte < src_len && src_byte == 0;
- i_byte++)
- src_byte |= src[i_byte];
- if (src_byte == 0)
- break;
- node_limit = src_len - src_off;
- }
+ struct ebitmap_node *e_iter = NULL;
+ struct ebitmap_node *emap_prev = NULL;
+ struct netlbl_lsm_secattr_catmap *c_iter = catmap;
+ u32 c_idx;
- node_new = kzalloc(sizeof(*node_new), GFP_ATOMIC);
- if (unlikely(node_new == NULL)) {
- ebitmap_destroy(dst);
- return -ENOMEM;
- }
- node_new->startbit = src_off * 8;
- for (i_byte = 0; i_byte < node_limit; i_byte++) {
- src_byte = src[src_off++];
- for (i_bit = i_byte * 8; src_byte != 0; i_bit++) {
- if (src_byte & 0x80)
- node_new->map |= MAPBIT << i_bit;
- src_byte <<= 1;
- }
- }
+ /* This function is a much simpler because SELinux's MAPTYPE happens
+ * to be the same as NetLabel's NETLBL_CATMAP_MAPTYPE, if MAPTYPE is
+ * changed from a u64 this function will most likely need to be changed
+ * as well. It's not ideal but I think the tradeoff in terms of
+ * neatness and speed is worth it. */
- if (node_last != NULL)
- node_last->next = node_new;
- else
- dst->node = node_new;
- node_last = node_new;
- }
+ do {
+ for (c_idx = 0; c_idx < NETLBL_CATMAP_MAPCNT; c_idx++) {
+ if (c_iter->bitmap[c_idx] == 0)
+ continue;
+
+ e_iter = kzalloc(sizeof(*e_iter), GFP_ATOMIC);
+ if (e_iter == NULL)
+ goto netlbl_import_failure;
+ if (emap_prev == NULL)
+ ebmap->node = e_iter;
+ else
+ emap_prev->next = e_iter;
+ emap_prev = e_iter;
- if (likely(node_last != NULL))
- dst->highbit = node_last->startbit + MAPSIZE;
+ e_iter->startbit = c_iter->startbit +
+ NETLBL_CATMAP_MAPSIZE * c_idx;
+ e_iter->map = c_iter->bitmap[c_idx];
+ }
+ c_iter = c_iter->next;
+ } while (c_iter != NULL);
+ if (e_iter != NULL)
+ ebmap->highbit = e_iter->startbit + MAPSIZE;
else
- ebitmap_init(dst);
+ ebitmap_destroy(ebmap);
return 0;
+
+netlbl_import_failure:
+ ebitmap_destroy(ebmap);
+ return -ENOMEM;
}
+#endif /* CONFIG_NETLABEL */
int ebitmap_contains(struct ebitmap *e1, struct ebitmap *e2)
{
diff --git a/security/selinux/ss/ebitmap.h b/security/selinux/ss/ebitmap.h
index da2d4651b10..1270e34b61c 100644
--- a/security/selinux/ss/ebitmap.h
+++ b/security/selinux/ss/ebitmap.h
@@ -14,6 +14,8 @@
#ifndef _SS_EBITMAP_H_
#define _SS_EBITMAP_H_
+#include <net/netlabel.h>
+
#define MAPTYPE u64 /* portion of bitmap in each node */
#define MAPSIZE (sizeof(MAPTYPE) * 8) /* number of bits in node bitmap */
#define MAPBIT 1ULL /* a bit in the node bitmap */
@@ -69,16 +71,28 @@ static inline int ebitmap_node_get_bit(struct ebitmap_node * n,
int ebitmap_cmp(struct ebitmap *e1, struct ebitmap *e2);
int ebitmap_cpy(struct ebitmap *dst, struct ebitmap *src);
-int ebitmap_export(const struct ebitmap *src,
- unsigned char **dst,
- size_t *dst_len);
-int ebitmap_import(const unsigned char *src,
- size_t src_len,
- struct ebitmap *dst);
int ebitmap_contains(struct ebitmap *e1, struct ebitmap *e2);
int ebitmap_get_bit(struct ebitmap *e, unsigned long bit);
int ebitmap_set_bit(struct ebitmap *e, unsigned long bit, int value);
void ebitmap_destroy(struct ebitmap *e);
int ebitmap_read(struct ebitmap *e, void *fp);
+#ifdef CONFIG_NETLABEL
+int ebitmap_netlbl_export(struct ebitmap *ebmap,
+ struct netlbl_lsm_secattr_catmap **catmap);
+int ebitmap_netlbl_import(struct ebitmap *ebmap,
+ struct netlbl_lsm_secattr_catmap *catmap);
+#else
+static inline int ebitmap_netlbl_export(struct ebitmap *ebmap,
+ struct netlbl_lsm_secattr_catmap **catmap)
+{
+ return -ENOMEM;
+}
+static inline int ebitmap_netlbl_import(struct ebitmap *ebmap,
+ struct netlbl_lsm_secattr_catmap *catmap)
+{
+ return -ENOMEM;
+}
+#endif
+
#endif /* _SS_EBITMAP_H_ */
diff --git a/security/selinux/ss/hashtab.c b/security/selinux/ss/hashtab.c
index 24e5ec95763..77b530c3bbc 100644
--- a/security/selinux/ss/hashtab.c
+++ b/security/selinux/ss/hashtab.c
@@ -8,8 +8,8 @@
#include <linux/errno.h>
#include "hashtab.h"
-struct hashtab *hashtab_create(u32 (*hash_value)(struct hashtab *h, void *key),
- int (*keycmp)(struct hashtab *h, void *key1, void *key2),
+struct hashtab *hashtab_create(u32 (*hash_value)(struct hashtab *h, const void *key),
+ int (*keycmp)(struct hashtab *h, const void *key1, const void *key2),
u32 size)
{
struct hashtab *p;
@@ -71,7 +71,7 @@ int hashtab_insert(struct hashtab *h, void *key, void *datum)
return 0;
}
-void *hashtab_search(struct hashtab *h, void *key)
+void *hashtab_search(struct hashtab *h, const void *key)
{
u32 hvalue;
struct hashtab_node *cur;
diff --git a/security/selinux/ss/hashtab.h b/security/selinux/ss/hashtab.h
index 4cc85816a71..7e2ff3e3c6d 100644
--- a/security/selinux/ss/hashtab.h
+++ b/security/selinux/ss/hashtab.h
@@ -22,9 +22,9 @@ struct hashtab {
struct hashtab_node **htable; /* hash table */
u32 size; /* number of slots in hash table */
u32 nel; /* number of elements in hash table */
- u32 (*hash_value)(struct hashtab *h, void *key);
+ u32 (*hash_value)(struct hashtab *h, const void *key);
/* hash function */
- int (*keycmp)(struct hashtab *h, void *key1, void *key2);
+ int (*keycmp)(struct hashtab *h, const void *key1, const void *key2);
/* key comparison function */
};
@@ -39,8 +39,8 @@ struct hashtab_info {
* Returns NULL if insufficent space is available or
* the new hash table otherwise.
*/
-struct hashtab *hashtab_create(u32 (*hash_value)(struct hashtab *h, void *key),
- int (*keycmp)(struct hashtab *h, void *key1, void *key2),
+struct hashtab *hashtab_create(u32 (*hash_value)(struct hashtab *h, const void *key),
+ int (*keycmp)(struct hashtab *h, const void *key1, const void *key2),
u32 size);
/*
@@ -59,7 +59,7 @@ int hashtab_insert(struct hashtab *h, void *k, void *d);
* Returns NULL if no entry has the specified key or
* the datum of the entry otherwise.
*/
-void *hashtab_search(struct hashtab *h, void *k);
+void *hashtab_search(struct hashtab *h, const void *k);
/*
* Destroys the specified hash table.
diff --git a/security/selinux/ss/mls.c b/security/selinux/ss/mls.c
index 2cca8e25162..b4f682dc13f 100644
--- a/security/selinux/ss/mls.c
+++ b/security/selinux/ss/mls.c
@@ -13,7 +13,7 @@
/*
* Updated: Hewlett-Packard <paul.moore@hp.com>
*
- * Added support to import/export the MLS label
+ * Added support to import/export the MLS label from NetLabel
*
* (c) Copyright Hewlett-Packard Development Company, L.P., 2006
*/
@@ -22,6 +22,7 @@
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/errno.h>
+#include <net/netlabel.h>
#include "sidtab.h"
#include "mls.h"
#include "policydb.h"
@@ -571,163 +572,108 @@ int mls_compute_sid(struct context *scontext,
return -EINVAL;
}
+#ifdef CONFIG_NETLABEL
/**
- * mls_export_lvl - Export the MLS sensitivity levels
+ * mls_export_netlbl_lvl - Export the MLS sensitivity levels to NetLabel
* @context: the security context
- * @low: the low sensitivity level
- * @high: the high sensitivity level
+ * @secattr: the NetLabel security attributes
*
* Description:
- * Given the security context copy the low MLS sensitivity level into lvl_low
- * and the high sensitivity level in lvl_high. The MLS levels are only
- * exported if the pointers are not NULL, if they are NULL then that level is
- * not exported.
+ * Given the security context copy the low MLS sensitivity level into the
+ * NetLabel MLS sensitivity level field.
*
*/
-void mls_export_lvl(const struct context *context, u32 *low, u32 *high)
+void mls_export_netlbl_lvl(struct context *context,
+ struct netlbl_lsm_secattr *secattr)
{
if (!selinux_mls_enabled)
return;
- if (low != NULL)
- *low = context->range.level[0].sens - 1;
- if (high != NULL)
- *high = context->range.level[1].sens - 1;
+ secattr->mls_lvl = context->range.level[0].sens - 1;
+ secattr->flags |= NETLBL_SECATTR_MLS_LVL;
}
/**
- * mls_import_lvl - Import the MLS sensitivity levels
+ * mls_import_netlbl_lvl - Import the NetLabel MLS sensitivity levels
* @context: the security context
- * @low: the low sensitivity level
- * @high: the high sensitivity level
+ * @secattr: the NetLabel security attributes
*
* Description:
- * Given the security context and the two sensitivty levels, set the MLS levels
- * in the context according the two given as parameters. Returns zero on
- * success, negative values on failure.
+ * Given the security context and the NetLabel security attributes, copy the
+ * NetLabel MLS sensitivity level into the context.
*
*/
-void mls_import_lvl(struct context *context, u32 low, u32 high)
+void mls_import_netlbl_lvl(struct context *context,
+ struct netlbl_lsm_secattr *secattr)
{
if (!selinux_mls_enabled)
return;
- context->range.level[0].sens = low + 1;
- context->range.level[1].sens = high + 1;
+ context->range.level[0].sens = secattr->mls_lvl + 1;
+ context->range.level[1].sens = context->range.level[0].sens;
}
/**
- * mls_export_cat - Export the MLS categories
+ * mls_export_netlbl_cat - Export the MLS categories to NetLabel
* @context: the security context
- * @low: the low category
- * @low_len: length of the cat_low bitmap in bytes
- * @high: the high category
- * @high_len: length of the cat_high bitmap in bytes
+ * @secattr: the NetLabel security attributes
*
* Description:
- * Given the security context export the low MLS category bitmap into cat_low
- * and the high category bitmap into cat_high. The MLS categories are only
- * exported if the pointers are not NULL, if they are NULL then that level is
- * not exported. The caller is responsibile for freeing the memory when
- * finished. Returns zero on success, negative values on failure.
+ * Given the security context copy the low MLS categories into the NetLabel
+ * MLS category field. Returns zero on success, negative values on failure.
*
*/
-int mls_export_cat(const struct context *context,
- unsigned char **low,
- size_t *low_len,
- unsigned char **high,
- size_t *high_len)
+int mls_export_netlbl_cat(struct context *context,
+ struct netlbl_lsm_secattr *secattr)
{
- int rc = -EPERM;
+ int rc;
- if (!selinux_mls_enabled) {
- *low = NULL;
- *low_len = 0;
- *high = NULL;
- *high_len = 0;
+ if (!selinux_mls_enabled)
return 0;
- }
- if (low != NULL) {
- rc = ebitmap_export(&context->range.level[0].cat,
- low,
- low_len);
- if (rc != 0)
- goto export_cat_failure;
- }
- if (high != NULL) {
- rc = ebitmap_export(&context->range.level[1].cat,
- high,
- high_len);
- if (rc != 0)
- goto export_cat_failure;
- }
-
- return 0;
+ rc = ebitmap_netlbl_export(&context->range.level[0].cat,
+ &secattr->mls_cat);
+ if (rc == 0 && secattr->mls_cat != NULL)
+ secattr->flags |= NETLBL_SECATTR_MLS_CAT;
-export_cat_failure:
- if (low != NULL) {
- kfree(*low);
- *low = NULL;
- *low_len = 0;
- }
- if (high != NULL) {
- kfree(*high);
- *high = NULL;
- *high_len = 0;
- }
return rc;
}
/**
- * mls_import_cat - Import the MLS categories
+ * mls_import_netlbl_cat - Import the MLS categories from NetLabel
* @context: the security context
- * @low: the low category
- * @low_len: length of the cat_low bitmap in bytes
- * @high: the high category
- * @high_len: length of the cat_high bitmap in bytes
+ * @secattr: the NetLabel security attributes
*
* Description:
- * Given the security context and the two category bitmap strings import the
- * categories into the security context. The MLS categories are only imported
- * if the pointers are not NULL, if they are NULL they are skipped. Returns
- * zero on success, negative values on failure.
+ * Copy the NetLabel security attributes into the SELinux context; since the
+ * NetLabel security attribute only contains a single MLS category use it for
+ * both the low and high categories of the context. Returns zero on success,
+ * negative values on failure.
*
*/
-int mls_import_cat(struct context *context,
- const unsigned char *low,
- size_t low_len,
- const unsigned char *high,
- size_t high_len)
+int mls_import_netlbl_cat(struct context *context,
+ struct netlbl_lsm_secattr *secattr)
{
- int rc = -EPERM;
+ int rc;
if (!selinux_mls_enabled)
return 0;
- if (low != NULL) {
- rc = ebitmap_import(low,
- low_len,
- &context->range.level[0].cat);
- if (rc != 0)
- goto import_cat_failure;
- }
- if (high != NULL) {
- if (high == low)
- rc = ebitmap_cpy(&context->range.level[1].cat,
- &context->range.level[0].cat);
- else
- rc = ebitmap_import(high,
- high_len,
- &context->range.level[1].cat);
- if (rc != 0)
- goto import_cat_failure;
- }
+ rc = ebitmap_netlbl_import(&context->range.level[0].cat,
+ secattr->mls_cat);
+ if (rc != 0)
+ goto import_netlbl_cat_failure;
+
+ rc = ebitmap_cpy(&context->range.level[1].cat,
+ &context->range.level[0].cat);
+ if (rc != 0)
+ goto import_netlbl_cat_failure;
return 0;
-import_cat_failure:
+import_netlbl_cat_failure:
ebitmap_destroy(&context->range.level[0].cat);
ebitmap_destroy(&context->range.level[1].cat);
return rc;
}
+#endif /* CONFIG_NETLABEL */
diff --git a/security/selinux/ss/mls.h b/security/selinux/ss/mls.h
index df6032c6d49..661d6fc7696 100644
--- a/security/selinux/ss/mls.h
+++ b/security/selinux/ss/mls.h
@@ -13,7 +13,7 @@
/*
* Updated: Hewlett-Packard <paul.moore@hp.com>
*
- * Added support to import/export the MLS label
+ * Added support to import/export the MLS label from NetLabel
*
* (c) Copyright Hewlett-Packard Development Company, L.P., 2006
*/
@@ -69,19 +69,37 @@ int mls_compute_sid(struct context *scontext,
int mls_setup_user_range(struct context *fromcon, struct user_datum *user,
struct context *usercon);
-void mls_export_lvl(const struct context *context, u32 *low, u32 *high);
-void mls_import_lvl(struct context *context, u32 low, u32 high);
-
-int mls_export_cat(const struct context *context,
- unsigned char **low,
- size_t *low_len,
- unsigned char **high,
- size_t *high_len);
-int mls_import_cat(struct context *context,
- const unsigned char *low,
- size_t low_len,
- const unsigned char *high,
- size_t high_len);
+#ifdef CONFIG_NETLABEL
+void mls_export_netlbl_lvl(struct context *context,
+ struct netlbl_lsm_secattr *secattr);
+void mls_import_netlbl_lvl(struct context *context,
+ struct netlbl_lsm_secattr *secattr);
+int mls_export_netlbl_cat(struct context *context,
+ struct netlbl_lsm_secattr *secattr);
+int mls_import_netlbl_cat(struct context *context,
+ struct netlbl_lsm_secattr *secattr);
+#else
+static inline void mls_export_netlbl_lvl(struct context *context,
+ struct netlbl_lsm_secattr *secattr)
+{
+ return;
+}
+static inline void mls_import_netlbl_lvl(struct context *context,
+ struct netlbl_lsm_secattr *secattr)
+{
+ return;
+}
+static inline int mls_export_netlbl_cat(struct context *context,
+ struct netlbl_lsm_secattr *secattr)
+{
+ return -ENOMEM;
+}
+static inline int mls_import_netlbl_cat(struct context *context,
+ struct netlbl_lsm_secattr *secattr)
+{
+ return -ENOMEM;
+}
+#endif
#endif /* _SS_MLS_H */
diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c
index ba48961f9d0..cd79c6338aa 100644
--- a/security/selinux/ss/policydb.c
+++ b/security/selinux/ss/policydb.c
@@ -468,7 +468,7 @@ static int common_destroy(void *key, void *datum, void *p)
return 0;
}
-static int class_destroy(void *key, void *datum, void *p)
+static int cls_destroy(void *key, void *datum, void *p)
{
struct class_datum *cladatum;
struct constraint_node *constraint, *ctemp;
@@ -566,7 +566,7 @@ static int cat_destroy(void *key, void *datum, void *p)
static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) =
{
common_destroy,
- class_destroy,
+ cls_destroy,
role_destroy,
type_destroy,
user_destroy,
@@ -1124,7 +1124,7 @@ static int class_read(struct policydb *p, struct hashtab *h, void *fp)
out:
return rc;
bad:
- class_destroy(key, cladatum, NULL);
+ cls_destroy(key, cladatum, NULL);
goto out;
}
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index bfe122764c9..bdb7070dd3d 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -17,9 +17,13 @@
*
* Added support for NetLabel
*
+ * Updated: Chad Sellers <csellers@tresys.com>
+ *
+ * Added validation of kernel classes and permissions
+ *
* Copyright (C) 2006 Hewlett-Packard Development Company, L.P.
* Copyright (C) 2004-2006 Trusted Computer Solutions, Inc.
- * Copyright (C) 2003 - 2004 Tresys Technology, LLC
+ * Copyright (C) 2003 - 2004, 2006 Tresys Technology, LLC
* Copyright (C) 2003 Red Hat, Inc., James Morris <jmorris@redhat.com>
* 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
@@ -29,6 +33,7 @@
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/spinlock.h>
+#include <linux/rcupdate.h>
#include <linux/errno.h>
#include <linux/in.h>
#include <linux/sched.h>
@@ -49,10 +54,17 @@
#include "mls.h"
#include "objsec.h"
#include "selinux_netlabel.h"
+#include "xfrm.h"
+#include "ebitmap.h"
extern void selnl_notify_policyload(u32 seqno);
unsigned int policydb_loaded_version;
+/*
+ * This is declared in avc.c
+ */
+extern const struct selinux_class_perm selinux_class_perm;
+
static DEFINE_RWLOCK(policy_rwlock);
#define POLICY_RDLOCK read_lock(&policy_rwlock)
#define POLICY_WRLOCK write_lock_irq(&policy_rwlock)
@@ -1019,86 +1031,112 @@ int security_change_sid(u32 ssid,
}
/*
- * Verify that each permission that is defined under the
- * existing policy is still defined with the same value
- * in the new policy.
- */
-static int validate_perm(void *key, void *datum, void *p)
-{
- struct hashtab *h;
- struct perm_datum *perdatum, *perdatum2;
- int rc = 0;
-
-
- h = p;
- perdatum = datum;
-
- perdatum2 = hashtab_search(h, key);
- if (!perdatum2) {
- printk(KERN_ERR "security: permission %s disappeared",
- (char *)key);
- rc = -ENOENT;
- goto out;
- }
- if (perdatum->value != perdatum2->value) {
- printk(KERN_ERR "security: the value of permission %s changed",
- (char *)key);
- rc = -EINVAL;
- }
-out:
- return rc;
-}
-
-/*
- * Verify that each class that is defined under the
- * existing policy is still defined with the same
- * attributes in the new policy.
+ * Verify that each kernel class that is defined in the
+ * policy is correct
*/
-static int validate_class(void *key, void *datum, void *p)
+static int validate_classes(struct policydb *p)
{
- struct policydb *newp;
- struct class_datum *cladatum, *cladatum2;
- int rc;
-
- newp = p;
- cladatum = datum;
-
- cladatum2 = hashtab_search(newp->p_classes.table, key);
- if (!cladatum2) {
- printk(KERN_ERR "security: class %s disappeared\n",
- (char *)key);
- rc = -ENOENT;
- goto out;
- }
- if (cladatum->value != cladatum2->value) {
- printk(KERN_ERR "security: the value of class %s changed\n",
- (char *)key);
- rc = -EINVAL;
- goto out;
+ int i, j;
+ struct class_datum *cladatum;
+ struct perm_datum *perdatum;
+ u32 nprim, tmp, common_pts_len, perm_val, pol_val;
+ u16 class_val;
+ const struct selinux_class_perm *kdefs = &selinux_class_perm;
+ const char *def_class, *def_perm, *pol_class;
+ struct symtab *perms;
+
+ for (i = 1; i < kdefs->cts_len; i++) {
+ def_class = kdefs->class_to_string[i];
+ if (i > p->p_classes.nprim) {
+ printk(KERN_INFO
+ "security: class %s not defined in policy\n",
+ def_class);
+ continue;
+ }
+ pol_class = p->p_class_val_to_name[i-1];
+ if (strcmp(pol_class, def_class)) {
+ printk(KERN_ERR
+ "security: class %d is incorrect, found %s but should be %s\n",
+ i, pol_class, def_class);
+ return -EINVAL;
+ }
}
- if ((cladatum->comdatum && !cladatum2->comdatum) ||
- (!cladatum->comdatum && cladatum2->comdatum)) {
- printk(KERN_ERR "security: the inherits clause for the access "
- "vector definition for class %s changed\n", (char *)key);
- rc = -EINVAL;
- goto out;
+ for (i = 0; i < kdefs->av_pts_len; i++) {
+ class_val = kdefs->av_perm_to_string[i].tclass;
+ perm_val = kdefs->av_perm_to_string[i].value;
+ def_perm = kdefs->av_perm_to_string[i].name;
+ if (class_val > p->p_classes.nprim)
+ continue;
+ pol_class = p->p_class_val_to_name[class_val-1];
+ cladatum = hashtab_search(p->p_classes.table, pol_class);
+ BUG_ON(!cladatum);
+ perms = &cladatum->permissions;
+ nprim = 1 << (perms->nprim - 1);
+ if (perm_val > nprim) {
+ printk(KERN_INFO
+ "security: permission %s in class %s not defined in policy\n",
+ def_perm, pol_class);
+ continue;
+ }
+ perdatum = hashtab_search(perms->table, def_perm);
+ if (perdatum == NULL) {
+ printk(KERN_ERR
+ "security: permission %s in class %s not found in policy\n",
+ def_perm, pol_class);
+ return -EINVAL;
+ }
+ pol_val = 1 << (perdatum->value - 1);
+ if (pol_val != perm_val) {
+ printk(KERN_ERR
+ "security: permission %s in class %s has incorrect value\n",
+ def_perm, pol_class);
+ return -EINVAL;
+ }
}
- if (cladatum->comdatum) {
- rc = hashtab_map(cladatum->comdatum->permissions.table, validate_perm,
- cladatum2->comdatum->permissions.table);
- if (rc) {
- printk(" in the access vector definition for class "
- "%s\n", (char *)key);
- goto out;
+ for (i = 0; i < kdefs->av_inherit_len; i++) {
+ class_val = kdefs->av_inherit[i].tclass;
+ if (class_val > p->p_classes.nprim)
+ continue;
+ pol_class = p->p_class_val_to_name[class_val-1];
+ cladatum = hashtab_search(p->p_classes.table, pol_class);
+ BUG_ON(!cladatum);
+ if (!cladatum->comdatum) {
+ printk(KERN_ERR
+ "security: class %s should have an inherits clause but does not\n",
+ pol_class);
+ return -EINVAL;
+ }
+ tmp = kdefs->av_inherit[i].common_base;
+ common_pts_len = 0;
+ while (!(tmp & 0x01)) {
+ common_pts_len++;
+ tmp >>= 1;
+ }
+ perms = &cladatum->comdatum->permissions;
+ for (j = 0; j < common_pts_len; j++) {
+ def_perm = kdefs->av_inherit[i].common_pts[j];
+ if (j >= perms->nprim) {
+ printk(KERN_INFO
+ "security: permission %s in class %s not defined in policy\n",
+ def_perm, pol_class);
+ continue;
+ }
+ perdatum = hashtab_search(perms->table, def_perm);
+ if (perdatum == NULL) {
+ printk(KERN_ERR
+ "security: permission %s in class %s not found in policy\n",
+ def_perm, pol_class);
+ return -EINVAL;
+ }
+ if (perdatum->value != j + 1) {
+ printk(KERN_ERR
+ "security: permission %s in class %s has incorrect value\n",
+ def_perm, pol_class);
+ return -EINVAL;
+ }
}
}
- rc = hashtab_map(cladatum->permissions.table, validate_perm,
- cladatum2->permissions.table);
- if (rc)
- printk(" in access vector definition for class %s\n",
- (char *)key);
-out:
- return rc;
+ return 0;
}
/* Clone the SID into the new SID table. */
@@ -1243,6 +1281,16 @@ int security_load_policy(void *data, size_t len)
avtab_cache_destroy();
return -EINVAL;
}
+ /* Verify that the kernel defined classes are correct. */
+ if (validate_classes(&policydb)) {
+ printk(KERN_ERR
+ "security: the definition of a class is incorrect\n");
+ LOAD_UNLOCK;
+ sidtab_destroy(&sidtab);
+ policydb_destroy(&policydb);
+ avtab_cache_destroy();
+ return -EINVAL;
+ }
policydb_loaded_version = policydb.policyvers;
ss_initialized = 1;
seqno = ++latest_granting;
@@ -1265,10 +1313,10 @@ int security_load_policy(void *data, size_t len)
sidtab_init(&newsidtab);
- /* Verify that the existing classes did not change. */
- if (hashtab_map(policydb.p_classes.table, validate_class, &newpolicydb)) {
- printk(KERN_ERR "security: the definition of an existing "
- "class changed\n");
+ /* Verify that the kernel defined classes are correct. */
+ if (validate_classes(&newpolicydb)) {
+ printk(KERN_ERR
+ "security: the definition of a class is incorrect\n");
rc = -EINVAL;
goto err;
}
@@ -2145,6 +2193,32 @@ void selinux_audit_set_callback(int (*callback)(void))
aurule_callback = callback;
}
+/**
+ * security_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.
+ *
+ */
+void security_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);
+}
+
#ifdef CONFIG_NETLABEL
/*
* This is the structure we store inside the NetLabel cache block.
@@ -2209,8 +2283,6 @@ static void selinux_netlbl_cache_add(struct sk_buff *skb, struct context *ctx)
cache = kzalloc(sizeof(*cache), GFP_ATOMIC);
if (cache == NULL)
goto netlbl_cache_add_return;
- secattr.cache->free = selinux_netlbl_cache_free;
- secattr.cache->data = (void *)cache;
cache->type = NETLBL_CACHE_T_MLS;
if (ebitmap_cpy(&cache->data.mls_label.level[0].cat,
@@ -2223,6 +2295,10 @@ static void selinux_netlbl_cache_add(struct sk_buff *skb, struct context *ctx)
cache->data.mls_label.level[0].sens = ctx->range.level[0].sens;
cache->data.mls_label.level[1].sens = ctx->range.level[0].sens;
+ secattr.cache->free = selinux_netlbl_cache_free;
+ secattr.cache->data = (void *)cache;
+ secattr.flags = NETLBL_SECATTR_CACHE;
+
netlbl_cache_add(skb, &secattr);
netlbl_cache_add_return:
@@ -2268,7 +2344,7 @@ static int selinux_netlbl_secattr_to_sid(struct sk_buff *skb,
POLICY_RDLOCK;
- if (secattr->cache) {
+ if (secattr->flags & NETLBL_SECATTR_CACHE) {
cache = NETLBL_CACHE(secattr->cache->data);
switch (cache->type) {
case NETLBL_CACHE_T_SID:
@@ -2301,7 +2377,7 @@ static int selinux_netlbl_secattr_to_sid(struct sk_buff *skb,
default:
goto netlbl_secattr_to_sid_return;
}
- } else if (secattr->mls_lvl_vld) {
+ } else if (secattr->flags & NETLBL_SECATTR_MLS_LVL) {
ctx = sidtab_search(&sidtab, base_sid);
if (ctx == NULL)
goto netlbl_secattr_to_sid_return;
@@ -2309,13 +2385,10 @@ static int selinux_netlbl_secattr_to_sid(struct sk_buff *skb,
ctx_new.user = ctx->user;
ctx_new.role = ctx->role;
ctx_new.type = ctx->type;
- mls_import_lvl(&ctx_new, secattr->mls_lvl, secattr->mls_lvl);
- if (secattr->mls_cat) {
- if (mls_import_cat(&ctx_new,
- secattr->mls_cat,
- secattr->mls_cat_len,
- NULL,
- 0) != 0)
+ mls_import_netlbl_lvl(&ctx_new, secattr);
+ if (secattr->flags & NETLBL_SECATTR_MLS_CAT) {
+ if (ebitmap_netlbl_import(&ctx_new.range.level[0].cat,
+ secattr->mls_cat) != 0)
goto netlbl_secattr_to_sid_return;
ctx_new.range.level[1].cat.highbit =
ctx_new.range.level[0].cat.highbit;
@@ -2360,20 +2433,20 @@ netlbl_secattr_to_sid_return_cleanup:
* assign to the packet. Returns zero on success, negative values on failure.
*
*/
-static int selinux_netlbl_skbuff_getsid(struct sk_buff *skb,
- u32 base_sid,
- u32 *sid)
+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)
+ if (rc == 0 && secattr.flags != NETLBL_SECATTR_NONE)
rc = selinux_netlbl_secattr_to_sid(skb,
&secattr,
base_sid,
sid);
+ else
+ *sid = SECSID_NULL;
netlbl_secattr_destroy(&secattr);
return rc;
@@ -2386,7 +2459,9 @@ static int selinux_netlbl_skbuff_getsid(struct sk_buff *skb,
*
* Description:
* Attempt to label a socket using the NetLabel mechanism using the given
- * SID. Returns zero values on success, negative values on failure.
+ * 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)
@@ -2409,19 +2484,18 @@ static int selinux_netlbl_socket_setsid(struct socket *sock, u32 sid)
secattr.domain = kstrdup(policydb.p_type_val_to_name[ctx->type - 1],
GFP_ATOMIC);
- mls_export_lvl(ctx, &secattr.mls_lvl, NULL);
- secattr.mls_lvl_vld = 1;
- rc = mls_export_cat(ctx,
- &secattr.mls_cat,
- &secattr.mls_cat_len,
- NULL,
- NULL);
+ secattr.flags |= NETLBL_SECATTR_DOMAIN;
+ mls_export_netlbl_lvl(ctx, &secattr);
+ rc = mls_export_netlbl_cat(ctx, &secattr);
if (rc != 0)
goto netlbl_socket_setsid_return;
rc = netlbl_socket_setattr(sock, &secattr);
- if (rc == 0)
+ if (rc == 0) {
+ spin_lock(&sksec->nlbl_lock);
sksec->nlbl_state = NLBL_LABELED;
+ spin_unlock(&sksec->nlbl_lock);
+ }
netlbl_socket_setsid_return:
POLICY_RDUNLOCK;
@@ -2430,6 +2504,25 @@ netlbl_socket_setsid_return:
}
/**
+ * 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
@@ -2442,14 +2535,13 @@ netlbl_socket_setsid_return:
void selinux_netlbl_sk_security_init(struct sk_security_struct *ssec,
int family)
{
- if (family == PF_INET)
- ssec->nlbl_state = NLBL_REQUIRE;
- else
- ssec->nlbl_state = NLBL_UNSET;
+ /* 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_clone_security - Copy the NetLabel fields
+ * selinux_netlbl_sk_security_clone - Copy the NetLabel fields
* @ssec: the original sk_security_struct
* @newssec: the cloned sk_security_struct
*
@@ -2458,41 +2550,41 @@ void selinux_netlbl_sk_security_init(struct sk_security_struct *ssec,
* @newssec.
*
*/
-void selinux_netlbl_sk_clone_security(struct sk_security_struct *ssec,
+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;
- if (ssec->nlbl_state != NLBL_UNSET)
- newssec->nlbl_state = NLBL_REQUIRE;
- else
- newssec->nlbl_state = NLBL_UNSET;
+ rcu_read_unlock();
}
/**
* selinux_netlbl_socket_post_create - Label a socket using NetLabel
* @sock: the socket to label
- * @sock_family: the socket family
- * @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.
*
*/
-int selinux_netlbl_socket_post_create(struct socket *sock,
- int sock_family,
- u32 sid)
+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;
- if (sock_family != PF_INET)
- return 0;
+ rcu_read_lock();
+ if (sksec->nlbl_state == NLBL_REQUIRE)
+ rc = selinux_netlbl_socket_setsid(sock, sksec->sid);
+ rcu_read_unlock();
- sksec->nlbl_state = NLBL_REQUIRE;
- return selinux_netlbl_socket_setsid(sock, sid);
+ return rc;
}
/**
@@ -2514,11 +2606,16 @@ void selinux_netlbl_sock_graft(struct sock *sk, struct socket *sock)
sksec->sclass = isec->sclass;
- if (sk->sk_family != PF_INET)
+ 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 &&
selinux_netlbl_secattr_to_sid(NULL,
&secattr,
SECINITSID_UNLABELED,
@@ -2526,35 +2623,12 @@ void selinux_netlbl_sock_graft(struct sock *sk, struct socket *sock)
sksec->peer_sid = nlbl_peer_sid;
netlbl_secattr_destroy(&secattr);
- sksec->nlbl_state = NLBL_REQUIRE;
-
/* 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);
-}
-
-/**
- * selinux_netlbl_inet_conn_request - Handle a new connection request
- * @skb: the packet
- * @sock_sid: the SID of the parent socket
- *
- * Description:
- * If present, use the security attributes of the packet in @skb and the
- * parent sock's SID to arrive at a SID for the new child sock. Returns the
- * SID of the connection or SECSID_NULL on failure.
- *
- */
-u32 selinux_netlbl_inet_conn_request(struct sk_buff *skb, u32 sock_sid)
-{
- int rc;
- u32 peer_sid;
-
- rc = selinux_netlbl_skbuff_getsid(skb, sock_sid, &peer_sid);
- if (rc != 0)
- return SECSID_NULL;
- return peer_sid;
+ rcu_read_unlock();
}
/**
@@ -2572,25 +2646,24 @@ u32 selinux_netlbl_inet_conn_request(struct sk_buff *skb, u32 sock_sid)
int selinux_netlbl_inode_permission(struct inode *inode, int mask)
{
int rc;
- struct inode_security_struct *isec;
struct sk_security_struct *sksec;
struct socket *sock;
- if (!S_ISSOCK(inode->i_mode))
+ if (!S_ISSOCK(inode->i_mode) ||
+ ((mask & (MAY_WRITE | MAY_APPEND)) == 0))
return 0;
-
sock = SOCKET_I(inode);
- isec = inode->i_security;
sksec = sock->sk->sk_security;
- mutex_lock(&isec->lock);
- if (unlikely(sksec->nlbl_state == NLBL_REQUIRE &&
- (mask & (MAY_WRITE | MAY_APPEND)))) {
- lock_sock(sock->sk);
- rc = selinux_netlbl_socket_setsid(sock, sksec->sid);
- release_sock(sock->sk);
- } else
- rc = 0;
- mutex_unlock(&isec->lock);
+
+ rcu_read_lock();
+ if (sksec->nlbl_state != NLBL_REQUIRE) {
+ rcu_read_unlock();
+ return 0;
+ }
+ lock_sock(sock->sk);
+ rc = selinux_netlbl_socket_setsid(sock, sksec->sid);
+ release_sock(sock->sk);
+ rcu_read_unlock();
return rc;
}
@@ -2648,42 +2721,6 @@ int selinux_netlbl_sock_rcv_skb(struct sk_security_struct *sksec,
}
/**
- * selinux_netlbl_socket_getpeersec_stream - Return the connected peer's SID
- * @sock: the socket
- *
- * Description:
- * Examine @sock to find the connected peer's SID. Returns the SID on success
- * or SECSID_NULL on error.
- *
- */
-u32 selinux_netlbl_socket_getpeersec_stream(struct socket *sock)
-{
- struct sk_security_struct *sksec = sock->sk->sk_security;
- return sksec->peer_sid;
-}
-
-/**
- * selinux_netlbl_socket_getpeersec_dgram - Return the SID of a NetLabel packet
- * @skb: the packet
- *
- * Description:
- * Examine @skb to find the SID assigned to it by NetLabel. Returns the SID on
- * success, SECSID_NULL on error.
- *
- */
-u32 selinux_netlbl_socket_getpeersec_dgram(struct sk_buff *skb)
-{
- int peer_sid;
-
- if (selinux_netlbl_skbuff_getsid(skb,
- SECINITSID_UNLABELED,
- &peer_sid) != 0)
- return SECSID_NULL;
-
- return peer_sid;
-}
-
-/**
* selinux_netlbl_socket_setsockopt - Do not allow users to remove a NetLabel
* @sock: the socket
* @level: the socket level or protocol
@@ -2701,21 +2738,19 @@ int selinux_netlbl_socket_setsockopt(struct socket *sock,
int optname)
{
int rc = 0;
- struct inode *inode = SOCK_INODE(sock);
struct sk_security_struct *sksec = sock->sk->sk_security;
- struct inode_security_struct *isec = inode->i_security;
struct netlbl_lsm_secattr secattr;
- mutex_lock(&isec->lock);
+ 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.cache || secattr.mls_lvl_vld))
+ if (rc == 0 && secattr.flags != NETLBL_SECATTR_NONE)
rc = -EACCES;
netlbl_secattr_destroy(&secattr);
}
- mutex_unlock(&isec->lock);
+ rcu_read_unlock();
return rc;
}
diff --git a/security/selinux/ss/symtab.c b/security/selinux/ss/symtab.c
index 24a10d36d3b..837658a98a5 100644
--- a/security/selinux/ss/symtab.c
+++ b/security/selinux/ss/symtab.c
@@ -9,9 +9,9 @@
#include <linux/errno.h>
#include "symtab.h"
-static unsigned int symhash(struct hashtab *h, void *key)
+static unsigned int symhash(struct hashtab *h, const void *key)
{
- char *p, *keyp;
+ const char *p, *keyp;
unsigned int size;
unsigned int val;
@@ -23,9 +23,9 @@ static unsigned int symhash(struct hashtab *h, void *key)
return val & (h->size - 1);
}
-static int symcmp(struct hashtab *h, void *key1, void *key2)
+static int symcmp(struct hashtab *h, const void *key1, const void *key2)
{
- char *keyp1, *keyp2;
+ const char *keyp1, *keyp2;
keyp1 = key1;
keyp2 = key2;
diff --git a/security/selinux/xfrm.c b/security/selinux/xfrm.c
index 675b995a67c..bd8d1ef40a9 100644
--- a/security/selinux/xfrm.c
+++ b/security/selinux/xfrm.c
@@ -115,76 +115,46 @@ int selinux_xfrm_state_pol_flow_match(struct xfrm_state *x, struct xfrm_policy *
struct flowi *fl)
{
u32 state_sid;
- u32 pol_sid;
- int err;
+ int rc;
- if (xp->security) {
- if (!x->security)
- /* unlabeled SA and labeled policy can't match */
- return 0;
- else
- state_sid = x->security->ctx_sid;
- pol_sid = xp->security->ctx_sid;
- } else
+ if (!xp->security)
if (x->security)
/* unlabeled policy and labeled SA can't match */
return 0;
else
/* unlabeled policy and unlabeled SA match all flows */
return 1;
-
- err = avc_has_perm(state_sid, pol_sid, SECCLASS_ASSOCIATION,
- ASSOCIATION__POLMATCH,
- NULL);
-
- if (err)
- return 0;
-
- err = avc_has_perm(fl->secid, state_sid, SECCLASS_ASSOCIATION,
- ASSOCIATION__SENDTO,
- NULL)? 0:1;
-
- return err;
-}
-
-/*
- * LSM hook implementation that authorizes that a particular outgoing flow
- * can use a given security association.
- */
-
-int selinux_xfrm_flow_state_match(struct flowi *fl, struct xfrm_state *xfrm,
- struct xfrm_policy *xp)
-{
- int rc = 0;
- u32 sel_sid = SECINITSID_UNLABELED;
- struct xfrm_sec_ctx *ctx;
-
- if (!xp->security)
- if (!xfrm->security)
- return 1;
- else
- return 0;
else
- if (!xfrm->security)
+ if (!x->security)
+ /* unlabeled SA and labeled policy can't match */
return 0;
+ else
+ if (!selinux_authorizable_xfrm(x))
+ /* Not a SELinux-labeled SA */
+ return 0;
- /* Context sid is either set to label or ANY_ASSOC */
- if ((ctx = xfrm->security)) {
- if (!selinux_authorizable_ctx(ctx))
- return 0;
+ state_sid = x->security->ctx_sid;
- sel_sid = ctx->ctx_sid;
- }
+ if (fl->secid != state_sid)
+ return 0;
- rc = avc_has_perm(fl->secid, sel_sid, SECCLASS_ASSOCIATION,
+ rc = avc_has_perm(fl->secid, state_sid, SECCLASS_ASSOCIATION,
ASSOCIATION__SENDTO,
NULL)? 0:1;
+ /*
+ * We don't need a separate SA Vs. policy polmatch check
+ * since the SA is now of the same label as the flow and
+ * a flow Vs. policy polmatch check had already happened
+ * in selinux_xfrm_policy_lookup() above.
+ */
+
return rc;
}
/*
- * LSM hook implementation that determines the sid for the session.
+ * LSM hook implementation that checks and/or returns the xfrm sid for the
+ * incoming packet.
*/
int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall)
@@ -226,16 +196,15 @@ int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall)
* CTX does not have a meaningful value on input
*/
static int selinux_xfrm_sec_ctx_alloc(struct xfrm_sec_ctx **ctxp,
- struct xfrm_user_sec_ctx *uctx, struct xfrm_sec_ctx *pol, u32 sid)
+ struct xfrm_user_sec_ctx *uctx, u32 sid)
{
int rc = 0;
struct task_security_struct *tsec = current->security;
struct xfrm_sec_ctx *ctx = NULL;
char *ctx_str = NULL;
u32 str_len;
- u32 ctx_sid;
- BUG_ON(uctx && pol);
+ BUG_ON(uctx && sid);
if (!uctx)
goto not_from_user;
@@ -279,15 +248,7 @@ static int selinux_xfrm_sec_ctx_alloc(struct xfrm_sec_ctx **ctxp,
return rc;
not_from_user:
- if (pol) {
- rc = security_sid_mls_copy(pol->ctx_sid, sid, &ctx_sid);
- if (rc)
- goto out;
- }
- else
- ctx_sid = sid;
-
- rc = security_sid_to_context(ctx_sid, &ctx_str, &str_len);
+ rc = security_sid_to_context(sid, &ctx_str, &str_len);
if (rc)
goto out;
@@ -302,7 +263,7 @@ not_from_user:
ctx->ctx_doi = XFRM_SC_DOI_LSM;
ctx->ctx_alg = XFRM_SC_ALG_SELINUX;
- ctx->ctx_sid = ctx_sid;
+ ctx->ctx_sid = sid;
ctx->ctx_len = str_len;
memcpy(ctx->ctx_str,
ctx_str,
@@ -323,22 +284,14 @@ out2:
* xfrm_policy.
*/
int selinux_xfrm_policy_alloc(struct xfrm_policy *xp,
- struct xfrm_user_sec_ctx *uctx, struct sock *sk)
+ struct xfrm_user_sec_ctx *uctx)
{
int err;
- u32 sid;
BUG_ON(!xp);
- BUG_ON(uctx && sk);
-
- if (sk) {
- struct sk_security_struct *ssec = sk->sk_security;
- sid = ssec->sid;
- }
- else
- sid = SECSID_NULL;
+ BUG_ON(!uctx);
- err = selinux_xfrm_sec_ctx_alloc(&xp->security, uctx, NULL, sid);
+ err = selinux_xfrm_sec_ctx_alloc(&xp->security, uctx, 0);
return err;
}
@@ -399,13 +352,13 @@ int selinux_xfrm_policy_delete(struct xfrm_policy *xp)
* xfrm_state.
*/
int selinux_xfrm_state_alloc(struct xfrm_state *x, struct xfrm_user_sec_ctx *uctx,
- struct xfrm_sec_ctx *pol, u32 secid)
+ u32 secid)
{
int err;
BUG_ON(!x);
- err = selinux_xfrm_sec_ctx_alloc(&x->security, uctx, pol, secid);
+ err = selinux_xfrm_sec_ctx_alloc(&x->security, uctx, secid);
return err;
}
@@ -419,74 +372,6 @@ void selinux_xfrm_state_free(struct xfrm_state *x)
kfree(ctx);
}
-/*
- * SELinux internal function to retrieve the context of a connected
- * (sk->sk_state == TCP_ESTABLISHED) TCP socket based on its security
- * association used to connect to the remote socket.
- *
- * Retrieve via getsockopt SO_PEERSEC.
- */
-u32 selinux_socket_getpeer_stream(struct sock *sk)
-{
- struct dst_entry *dst, *dst_test;
- u32 peer_sid = SECSID_NULL;
-
- if (sk->sk_state != TCP_ESTABLISHED)
- goto out;
-
- dst = sk_dst_get(sk);
- if (!dst)
- goto out;
-
- for (dst_test = dst; dst_test != 0;
- dst_test = dst_test->child) {
- struct xfrm_state *x = dst_test->xfrm;
-
- if (x && selinux_authorizable_xfrm(x)) {
- struct xfrm_sec_ctx *ctx = x->security;
- peer_sid = ctx->ctx_sid;
- break;
- }
- }
- dst_release(dst);
-
-out:
- return peer_sid;
-}
-
-/*
- * SELinux internal function to retrieve the context of a UDP packet
- * based on its security association used to connect to the remote socket.
- *
- * Retrieve via setsockopt IP_PASSSEC and recvmsg with control message
- * type SCM_SECURITY.
- */
-u32 selinux_socket_getpeer_dgram(struct sk_buff *skb)
-{
- struct sec_path *sp;
-
- if (skb == NULL)
- return SECSID_NULL;
-
- if (skb->sk->sk_protocol != IPPROTO_UDP)
- return SECSID_NULL;
-
- sp = skb->sp;
- if (sp) {
- int i;
-
- for (i = sp->len-1; i >= 0; i--) {
- struct xfrm_state *x = sp->xvec[i];
- if (selinux_authorizable_xfrm(x)) {
- struct xfrm_sec_ctx *ctx = x->security;
- return ctx->ctx_sid;
- }
- }
- }
-
- return SECSID_NULL;
-}
-
/*
* LSM hook implementation that authorizes deletion of labeled SAs.
*/
@@ -532,6 +417,13 @@ int selinux_xfrm_sock_rcv_skb(u32 isec_sid, struct sk_buff *skb,
}
}
+ /*
+ * This check even when there's no association involved is
+ * intended, according to Trent Jaeger, to make sure a
+ * process can't engage in non-ipsec communication unless
+ * explicitly allowed by policy.
+ */
+
rc = avc_has_perm(isec_sid, sel_sid, SECCLASS_ASSOCIATION,
ASSOCIATION__RECVFROM, ad);
@@ -543,10 +435,10 @@ int selinux_xfrm_sock_rcv_skb(u32 isec_sid, struct sk_buff *skb,
* If we have no security association, then we need to determine
* whether the socket is allowed to send to an unlabelled destination.
* If we do have a authorizable security association, then it has already been
- * checked in xfrm_policy_lookup hook.
+ * checked in the selinux_xfrm_state_pol_flow_match hook above.
*/
int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb,
- struct avc_audit_data *ad)
+ struct avc_audit_data *ad, u8 proto)
{
struct dst_entry *dst;
int rc = 0;
@@ -565,6 +457,27 @@ int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb,
}
}
+ switch (proto) {
+ case IPPROTO_AH:
+ case IPPROTO_ESP:
+ case IPPROTO_COMP:
+ /*
+ * We should have already seen this packet once before
+ * it underwent xfrm(s). No need to subject it to the
+ * unlabeled check.
+ */
+ goto out;
+ default:
+ break;
+ }
+
+ /*
+ * This check even when there's no association involved is
+ * intended, according to Trent Jaeger, to make sure a
+ * process can't engage in non-ipsec communication unless
+ * explicitly allowed by policy.
+ */
+
rc = avc_has_perm(isec_sid, SECINITSID_UNLABELED, SECCLASS_ASSOCIATION,
ASSOCIATION__SENDTO, ad);
out: