diff options
Diffstat (limited to 'security/selinux/netlabel.c')
| -rw-r--r-- | security/selinux/netlabel.c | 61 |
1 files changed, 38 insertions, 23 deletions
diff --git a/security/selinux/netlabel.c b/security/selinux/netlabel.c index e64eca246f1a..d243ddc723a5 100644 --- a/security/selinux/netlabel.c +++ b/security/selinux/netlabel.c @@ -155,13 +155,20 @@ 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); - else + if (rc == 0 && secattr.flags != NETLBL_SECATTR_NONE) { + rc = security_netlbl_secattr_to_sid(&secattr, base_sid, sid); + if (rc == 0 && + (secattr.flags & NETLBL_SECATTR_CACHEABLE) && + (secattr.flags & NETLBL_SECATTR_CACHE)) + netlbl_cache_add(skb, &secattr); + } else *sid = SECSID_NULL; netlbl_secattr_destroy(&secattr); @@ -198,7 +205,7 @@ 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 +302,46 @@ 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; - rc = selinux_netlbl_skbuff_getsid(skb, - SECINITSID_UNLABELED, - &netlbl_sid); + if (!netlbl_enabled()) + 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, + SECINITSID_NETMSG, + &nlbl_sid); + if (rc == 0 && + (secattr.flags & NETLBL_SECATTR_CACHEABLE) && + (secattr.flags & NETLBL_SECATTR_CACHE)) + netlbl_cache_add(skb, &secattr); + } 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; } |