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path: root/security/selinux/hooks.c
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Diffstat (limited to 'security/selinux/hooks.c')
-rw-r--r--security/selinux/hooks.c242
1 files changed, 133 insertions, 109 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 41b6f5d3194..54adc9d31e9 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -80,6 +80,7 @@
extern unsigned int policydb_loaded_version;
extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm);
+extern int selinux_compat_net;
#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
int selinux_enforcing = 0;
@@ -3216,47 +3217,17 @@ static int selinux_socket_unix_may_send(struct socket *sock,
return 0;
}
-static int selinux_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
+static int selinux_sock_rcv_skb_compat(struct sock *sk, struct sk_buff *skb,
+ struct avc_audit_data *ad, u32 sock_sid, u16 sock_class,
+ u16 family, char *addrp, int len)
{
- u16 family;
- char *addrp;
- int len, err = 0;
+ int err = 0;
u32 netif_perm, node_perm, node_sid, if_sid, recv_perm = 0;
- u32 sock_sid = 0;
- u16 sock_class = 0;
- struct socket *sock;
- struct net_device *dev;
- struct avc_audit_data ad;
-
- family = sk->sk_family;
- if (family != PF_INET && family != PF_INET6)
- goto out;
-
- /* Handle mapped IPv4 packets arriving via IPv6 sockets */
- if (family == PF_INET6 && skb->protocol == htons(ETH_P_IP))
- family = PF_INET;
-
- read_lock_bh(&sk->sk_callback_lock);
- sock = sk->sk_socket;
- if (sock) {
- struct inode *inode;
- inode = SOCK_INODE(sock);
- if (inode) {
- struct inode_security_struct *isec;
- isec = inode->i_security;
- sock_sid = isec->sid;
- sock_class = isec->sclass;
- }
- }
- read_unlock_bh(&sk->sk_callback_lock);
- if (!sock_sid)
- goto out;
- dev = skb->dev;
- if (!dev)
+ if (!skb->dev)
goto out;
- err = sel_netif_sids(dev, &if_sid, NULL);
+ err = sel_netif_sids(skb->dev, &if_sid, NULL);
if (err)
goto out;
@@ -3279,44 +3250,88 @@ static int selinux_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
break;
}
- AVC_AUDIT_DATA_INIT(&ad, NET);
- ad.u.net.netif = dev->name;
- ad.u.net.family = family;
-
- err = selinux_parse_skb(skb, &ad, &addrp, &len, 1);
- if (err)
- goto out;
-
- err = avc_has_perm(sock_sid, if_sid, SECCLASS_NETIF, netif_perm, &ad);
+ err = avc_has_perm(sock_sid, if_sid, SECCLASS_NETIF, netif_perm, ad);
if (err)
goto out;
- /* Fixme: this lookup is inefficient */
err = security_node_sid(family, addrp, len, &node_sid);
if (err)
goto out;
- err = avc_has_perm(sock_sid, node_sid, SECCLASS_NODE, node_perm, &ad);
+ err = avc_has_perm(sock_sid, node_sid, SECCLASS_NODE, node_perm, ad);
if (err)
goto out;
if (recv_perm) {
u32 port_sid;
- /* Fixme: make this more efficient */
err = security_port_sid(sk->sk_family, sk->sk_type,
- sk->sk_protocol, ntohs(ad.u.net.sport),
+ sk->sk_protocol, ntohs(ad->u.net.sport),
&port_sid);
if (err)
goto out;
err = avc_has_perm(sock_sid, port_sid,
- sock_class, recv_perm, &ad);
+ sock_class, recv_perm, ad);
}
- if (!err)
- err = selinux_xfrm_sock_rcv_skb(sock_sid, skb);
+out:
+ return err;
+}
+
+static int selinux_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
+{
+ u16 family;
+ u16 sock_class = 0;
+ char *addrp;
+ int len, err = 0;
+ u32 sock_sid = 0;
+ struct socket *sock;
+ struct avc_audit_data ad;
+
+ family = sk->sk_family;
+ if (family != PF_INET && family != PF_INET6)
+ goto out;
+
+ /* Handle mapped IPv4 packets arriving via IPv6 sockets */
+ if (family == PF_INET6 && skb->protocol == ntohs(ETH_P_IP))
+ family = PF_INET;
+
+ read_lock_bh(&sk->sk_callback_lock);
+ sock = sk->sk_socket;
+ if (sock) {
+ struct inode *inode;
+ inode = SOCK_INODE(sock);
+ if (inode) {
+ struct inode_security_struct *isec;
+ isec = inode->i_security;
+ sock_sid = isec->sid;
+ sock_class = isec->sclass;
+ }
+ }
+ read_unlock_bh(&sk->sk_callback_lock);
+ if (!sock_sid)
+ goto out;
+
+ AVC_AUDIT_DATA_INIT(&ad, NET);
+ ad.u.net.netif = skb->dev ? skb->dev->name : "[unknown]";
+ ad.u.net.family = family;
+
+ err = selinux_parse_skb(skb, &ad, &addrp, &len, 1);
+ if (err)
+ goto out;
+
+ if (selinux_compat_net)
+ err = selinux_sock_rcv_skb_compat(sk, skb, &ad, sock_sid,
+ sock_class, family,
+ addrp, len);
+ else
+ err = avc_has_perm(sock_sid, skb->secmark, SECCLASS_PACKET,
+ PACKET__RECV, &ad);
+ if (err)
+ goto out;
+ err = selinux_xfrm_sock_rcv_skb(sock_sid, skb);
out:
return err;
}
@@ -3456,42 +3471,18 @@ out:
#ifdef CONFIG_NETFILTER
-static unsigned int selinux_ip_postroute_last(unsigned int hooknum,
- struct sk_buff **pskb,
- const struct net_device *in,
- const struct net_device *out,
- int (*okfn)(struct sk_buff *),
- u16 family)
+static int selinux_ip_postroute_last_compat(struct sock *sk, struct net_device *dev,
+ struct inode_security_struct *isec,
+ struct avc_audit_data *ad,
+ u16 family, char *addrp, int len)
{
- char *addrp;
- int len, err = NF_ACCEPT;
+ int err;
u32 netif_perm, node_perm, node_sid, if_sid, send_perm = 0;
- struct sock *sk;
- struct socket *sock;
- struct inode *inode;
- struct sk_buff *skb = *pskb;
- struct inode_security_struct *isec;
- struct avc_audit_data ad;
- struct net_device *dev = (struct net_device *)out;
- sk = skb->sk;
- if (!sk)
- goto out;
-
- sock = sk->sk_socket;
- if (!sock)
- goto out;
-
- inode = SOCK_INODE(sock);
- if (!inode)
- goto out;
-
err = sel_netif_sids(dev, &if_sid, NULL);
if (err)
goto out;
- isec = inode->i_security;
-
switch (isec->sclass) {
case SECCLASS_UDP_SOCKET:
netif_perm = NETIF__UDP_SEND;
@@ -3511,55 +3502,88 @@ static unsigned int selinux_ip_postroute_last(unsigned int hooknum,
break;
}
-
- AVC_AUDIT_DATA_INIT(&ad, NET);
- ad.u.net.netif = dev->name;
- ad.u.net.family = family;
-
- err = selinux_parse_skb(skb, &ad, &addrp,
- &len, 0) ? NF_DROP : NF_ACCEPT;
- if (err != NF_ACCEPT)
- goto out;
-
- err = avc_has_perm(isec->sid, if_sid, SECCLASS_NETIF,
- netif_perm, &ad) ? NF_DROP : NF_ACCEPT;
- if (err != NF_ACCEPT)
+ err = avc_has_perm(isec->sid, if_sid, SECCLASS_NETIF, netif_perm, ad);
+ if (err)
goto out;
- /* Fixme: this lookup is inefficient */
- err = security_node_sid(family, addrp, len,
- &node_sid) ? NF_DROP : NF_ACCEPT;
- if (err != NF_ACCEPT)
+ err = security_node_sid(family, addrp, len, &node_sid);
+ if (err)
goto out;
- err = avc_has_perm(isec->sid, node_sid, SECCLASS_NODE,
- node_perm, &ad) ? NF_DROP : NF_ACCEPT;
- if (err != NF_ACCEPT)
+ err = avc_has_perm(isec->sid, node_sid, SECCLASS_NODE, node_perm, ad);
+ if (err)
goto out;
if (send_perm) {
u32 port_sid;
- /* Fixme: make this more efficient */
err = security_port_sid(sk->sk_family,
sk->sk_type,
sk->sk_protocol,
- ntohs(ad.u.net.dport),
- &port_sid) ? NF_DROP : NF_ACCEPT;
- if (err != NF_ACCEPT)
+ ntohs(ad->u.net.dport),
+ &port_sid);
+ if (err)
goto out;
err = avc_has_perm(isec->sid, port_sid, isec->sclass,
- send_perm, &ad) ? NF_DROP : NF_ACCEPT;
+ send_perm, ad);
}
+out:
+ return err;
+}
+
+static unsigned int selinux_ip_postroute_last(unsigned int hooknum,
+ struct sk_buff **pskb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *),
+ u16 family)
+{
+ char *addrp;
+ int len, err = 0;
+ struct sock *sk;
+ struct socket *sock;
+ struct inode *inode;
+ struct sk_buff *skb = *pskb;
+ struct inode_security_struct *isec;
+ struct avc_audit_data ad;
+ struct net_device *dev = (struct net_device *)out;
- if (err != NF_ACCEPT)
+ sk = skb->sk;
+ if (!sk)
goto out;
- err = selinux_xfrm_postroute_last(isec->sid, skb);
+ sock = sk->sk_socket;
+ if (!sock)
+ goto out;
+
+ inode = SOCK_INODE(sock);
+ if (!inode)
+ goto out;
+
+ isec = inode->i_security;
+
+ AVC_AUDIT_DATA_INIT(&ad, NET);
+ ad.u.net.netif = dev->name;
+ ad.u.net.family = family;
+
+ err = selinux_parse_skb(skb, &ad, &addrp, &len, 0);
+ if (err)
+ goto out;
+
+ if (selinux_compat_net)
+ err = selinux_ip_postroute_last_compat(sk, dev, isec, &ad,
+ family, addrp, len);
+ else
+ err = avc_has_perm(isec->sid, skb->secmark, SECCLASS_PACKET,
+ PACKET__SEND, &ad);
+ if (err)
+ goto out;
+
+ err = selinux_xfrm_postroute_last(isec->sid, skb);
out:
- return err;
+ return err ? NF_DROP : NF_ACCEPT;
}
static unsigned int selinux_ipv4_postroute_last(unsigned int hooknum,
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-28 05:39:40 +0000