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authorLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-19 14:42:40 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-19 14:42:40 -0700
commit721e2629fa2167c0e5a9f10d704b1fee1621a8cb (patch)
treea1580ed191e710f891ef1bf25c8c1fc7d6f054a9 /security
parentfdb64f93b38a3470fa4db8cd5720b8c731922d1a (diff)
parentf36158c410651fe66f438c17b2ab3ae813f8c060 (diff)
downloadlinux-linaro-721e2629fa2167c0e5a9f10d704b1fee1621a8cb.tar.gz
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: use SECINITSID_NETMSG instead of SECINITSID_UNLABELED for NetLabel SELinux: enable dynamic activation/deactivation of NetLabel/SELinux enforcement
Diffstat (limited to 'security')
-rw-r--r--security/selinux/hooks.c21
-rw-r--r--security/selinux/netlabel.c49
2 files changed, 39 insertions, 31 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 520b9998123..26356e67108 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -3129,17 +3129,19 @@ static int selinux_parse_skb(struct sk_buff *skb, struct avc_audit_data *ad,
/**
* 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.
+ * the external SID for the packet. If only one form of external labeling is
+ * present then it is used, if both labeled IPsec and NetLabel labels are
+ * present then the SELinux type information is taken from the labeled IPsec
+ * SA and the MLS sensitivity label information is taken from the NetLabel
+ * security attributes. This bit of "magic" is done in the call to
+ * selinux_netlbl_skbuff_getsid().
*
*/
-static void selinux_skb_extlbl_sid(struct sk_buff *skb,
- u32 base_sid,
- u32 *sid)
+static void selinux_skb_extlbl_sid(struct sk_buff *skb, u32 *sid)
{
u32 xfrm_sid;
u32 nlbl_sid;
@@ -3147,10 +3149,9 @@ static void selinux_skb_extlbl_sid(struct sk_buff *skb,
selinux_skb_xfrm_sid(skb, &xfrm_sid);
if (selinux_netlbl_skbuff_getsid(skb,
(xfrm_sid == SECSID_NULL ?
- base_sid : xfrm_sid),
+ SECINITSID_NETMSG : xfrm_sid),
&nlbl_sid) != 0)
nlbl_sid = SECSID_NULL;
-
*sid = (nlbl_sid == SECSID_NULL ? xfrm_sid : nlbl_sid);
}
@@ -3695,7 +3696,7 @@ 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)
- selinux_skb_extlbl_sid(skb, SECINITSID_UNLABELED, &peer_secid);
+ selinux_skb_extlbl_sid(skb, &peer_secid);
if (peer_secid == SECSID_NULL)
err = -EINVAL;
@@ -3756,7 +3757,7 @@ static int selinux_inet_conn_request(struct sock *sk, struct sk_buff *skb,
u32 newsid;
u32 peersid;
- selinux_skb_extlbl_sid(skb, SECINITSID_UNLABELED, &peersid);
+ selinux_skb_extlbl_sid(skb, &peersid);
if (peersid == SECSID_NULL) {
req->secid = sksec->sid;
req->peer_secid = SECSID_NULL;
@@ -3794,7 +3795,7 @@ static void selinux_inet_conn_established(struct sock *sk,
{
struct sk_security_struct *sksec = sk->sk_security;
- selinux_skb_extlbl_sid(skb, SECINITSID_UNLABELED, &sksec->peer_sid);
+ selinux_skb_extlbl_sid(skb, &sksec->peer_sid);
}
static void selinux_req_classify_flow(const struct request_sock *req,
diff --git a/security/selinux/netlabel.c b/security/selinux/netlabel.c
index e64eca246f1..051b14c88e2 100644
--- a/security/selinux/netlabel.c
+++ b/security/selinux/netlabel.c
@@ -155,12 +155,15 @@ int selinux_netlbl_skbuff_getsid(struct sk_buff *skb, u32 base_sid, u32 *sid)
int rc;
struct netlbl_lsm_secattr secattr;
+ if (!netlbl_enabled()) {
+ *sid = SECSID_NULL;
+ return 0;
+ }
+
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);
+ rc = security_netlbl_secattr_to_sid(&secattr, base_sid, sid);
else
*sid = SECSID_NULL;
netlbl_secattr_destroy(&secattr);
@@ -198,7 +201,7 @@ void selinux_netlbl_sock_graft(struct sock *sk, struct socket *sock)
if (netlbl_sock_getattr(sk, &secattr) == 0 &&
secattr.flags != NETLBL_SECATTR_NONE &&
security_netlbl_secattr_to_sid(&secattr,
- SECINITSID_UNLABELED,
+ SECINITSID_NETMSG,
&nlbl_peer_sid) == 0)
sksec->peer_sid = nlbl_peer_sid;
netlbl_secattr_destroy(&secattr);
@@ -295,38 +298,42 @@ int selinux_netlbl_sock_rcv_skb(struct sk_security_struct *sksec,
struct avc_audit_data *ad)
{
int rc;
- u32 netlbl_sid;
- u32 recv_perm;
+ u32 nlbl_sid;
+ u32 perm;
+ struct netlbl_lsm_secattr secattr;
+
+ if (!netlbl_enabled())
+ return 0;
- rc = selinux_netlbl_skbuff_getsid(skb,
- SECINITSID_UNLABELED,
- &netlbl_sid);
+ 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,
+ SECINITSID_NETMSG,
+ &nlbl_sid);
+ else
+ nlbl_sid = SECINITSID_UNLABELED;
+ netlbl_secattr_destroy(&secattr);
if (rc != 0)
return rc;
- if (netlbl_sid == SECSID_NULL)
- return 0;
-
switch (sksec->sclass) {
case SECCLASS_UDP_SOCKET:
- recv_perm = UDP_SOCKET__RECVFROM;
+ perm = UDP_SOCKET__RECVFROM;
break;
case SECCLASS_TCP_SOCKET:
- recv_perm = TCP_SOCKET__RECVFROM;
+ perm = TCP_SOCKET__RECVFROM;
break;
default:
- recv_perm = RAWIP_SOCKET__RECVFROM;
+ perm = RAWIP_SOCKET__RECVFROM;
}
- rc = avc_has_perm(sksec->sid,
- netlbl_sid,
- sksec->sclass,
- recv_perm,
- ad);
+ rc = avc_has_perm(sksec->sid, nlbl_sid, sksec->sclass, perm, ad);
if (rc == 0)
return 0;
- netlbl_skbuff_err(skb, rc);
+ if (nlbl_sid != SECINITSID_UNLABELED)
+ netlbl_skbuff_err(skb, rc);
return rc;
}