fs/vfs/security: pass last path component to LSM on inode creation

[mirror_ubuntu-bionic-kernel.git] / security / selinux / hooks.c

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 65fa8bf596f591d12c2e0c22bafe5824522c34ee..099bbd07732fd947be736dd2b6da53c4ffdfd794 100644 (file)
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -39,6 +39,7 @@
 #include <linux/swap.h>
 #include <linux/spinlock.h>
 #include <linux/syscalls.h>
+#include <linux/dcache.h>
 #include <linux/file.h>
 #include <linux/fdtable.h>
 #include <linux/namei.h>
@@ -2509,8 +2510,8 @@ static void selinux_inode_free_security(struct inode *inode)
 }
 
 static int selinux_inode_init_security(struct inode *inode, struct inode *dir,
-                                      char **name, void **value,
-                                      size_t *len)
+                                      const struct qstr *qstr, char **name,
+                                      void **value, size_t *len)
 {
        const struct task_security_struct *tsec = current_security();
        struct inode_security_struct *dsec;
@@ -2525,7 +2526,10 @@ static int selinux_inode_init_security(struct inode *inode, struct inode *dir,
        sid = tsec->sid;
        newsid = tsec->create_sid;
 
-       if (!newsid || !(sbsec->flags & SE_SBLABELSUPP)) {
+       if ((sbsec->flags & SE_SBINITIALIZED) &&
+           (sbsec->behavior == SECURITY_FS_USE_MNTPOINT))
+               newsid = sbsec->mntpoint_sid;
+       else if (!newsid || !(sbsec->flags & SE_SBLABELSUPP)) {
                rc = security_transition_sid(sid, dsec->sid,
                                             inode_mode_to_security_class(inode->i_mode),
                                             &newsid);
@@ -3921,18 +3925,18 @@ static int selinux_socket_shutdown(struct socket *sock, int how)
        return sock_has_perm(current, sock->sk, SOCKET__SHUTDOWN);
 }
 
-static int selinux_socket_unix_stream_connect(struct socket *sock,
-                                             struct socket *other,
+static int selinux_socket_unix_stream_connect(struct sock *sock,
+                                             struct sock *other,
                                              struct sock *newsk)
 {
-       struct sk_security_struct *sksec_sock = sock->sk->sk_security;
-       struct sk_security_struct *sksec_other = other->sk->sk_security;
+       struct sk_security_struct *sksec_sock = sock->sk_security;
+       struct sk_security_struct *sksec_other = other->sk_security;
        struct sk_security_struct *sksec_new = newsk->sk_security;
        struct common_audit_data ad;
        int err;
 
        COMMON_AUDIT_DATA_INIT(&ad, NET);
-       ad.u.net.sk = other->sk;
+       ad.u.net.sk = other;
 
        err = avc_has_perm(sksec_sock->sid, sksec_other->sid,
                           sksec_other->sclass,
@@ -4520,11 +4524,11 @@ static unsigned int selinux_ip_postroute_compat(struct sk_buff *skb,
        if (selinux_secmark_enabled())
                if (avc_has_perm(sksec->sid, skb->secmark,
                                 SECCLASS_PACKET, PACKET__SEND, &ad))
-                       return NF_DROP;
+                       return NF_DROP_ERR(-ECONNREFUSED);
 
        if (selinux_policycap_netpeer)
                if (selinux_xfrm_postroute_last(sksec->sid, skb, &ad, proto))
-                       return NF_DROP;
+                       return NF_DROP_ERR(-ECONNREFUSED);
 
        return NF_ACCEPT;
 }
@@ -4581,7 +4585,7 @@ static unsigned int selinux_ip_postroute(struct sk_buff *skb, int ifindex,
                                secmark_perm = PACKET__SEND;
                        break;
                default:
-                       return NF_DROP;
+                       return NF_DROP_ERR(-ECONNREFUSED);
                }
                if (secmark_perm == PACKET__FORWARD_OUT) {
                        if (selinux_skb_peerlbl_sid(skb, family, &peer_sid))
@@ -4603,7 +4607,7 @@ static unsigned int selinux_ip_postroute(struct sk_buff *skb, int ifindex,
        if (secmark_active)
                if (avc_has_perm(peer_sid, skb->secmark,
                                 SECCLASS_PACKET, secmark_perm, &ad))
-                       return NF_DROP;
+                       return NF_DROP_ERR(-ECONNREFUSED);
 
        if (peerlbl_active) {
                u32 if_sid;
@@ -4613,13 +4617,13 @@ static unsigned int selinux_ip_postroute(struct sk_buff *skb, int ifindex,
                        return NF_DROP;
                if (avc_has_perm(peer_sid, if_sid,
                                 SECCLASS_NETIF, NETIF__EGRESS, &ad))
-                       return NF_DROP;
+                       return NF_DROP_ERR(-ECONNREFUSED);
 
                if (sel_netnode_sid(addrp, family, &node_sid))
                        return NF_DROP;
                if (avc_has_perm(peer_sid, node_sid,
                                 SECCLASS_NODE, NODE__SENDTO, &ad))
-                       return NF_DROP;
+                       return NF_DROP_ERR(-ECONNREFUSED);
        }
 
        return NF_ACCEPT;