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Message-ID: <20090327211041.17777.95398.stgit@flek.lan>
Date: Fri, 27 Mar 2009 17:10:41 -0400
From: Paul Moore <paul.moore@...com>
To: linux-security-module@...r.kernel.org, selinux@...ho.nsa.gov
Cc: netdev@...r.kernel.org, casey@...aufler-ca.com,
etienne.basset@...ericable.fr
Subject: [PATCH 3/6] selinux: Remove the "compat_net" compatibility code
The SELinux "compat_net" is marked as deprecated, the time has come to
finally remove it from the kernel. Further code simplifications are
likely in the future, but this patch was intended to be a simple,
straight-up removal of the compat_net code.
Signed-off-by: Paul Moore <paul.moore@...com>
---
Documentation/feature-removal-schedule.txt | 11 --
Documentation/kernel-parameters.txt | 9 --
security/selinux/hooks.c | 153 +---------------------------
security/selinux/selinuxfs.c | 68 ------------
4 files changed, 7 insertions(+), 234 deletions(-)
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index e47c0ff..9b2cd68 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -328,17 +328,6 @@ Who: Hans de Goede <hdegoede@...hat.com>
---------------------------
-What: SELinux "compat_net" functionality
-When: 2.6.30 at the earliest
-Why: In 2.6.18 the Secmark concept was introduced to replace the "compat_net"
- network access control functionality of SELinux. Secmark offers both
- better performance and greater flexibility than the "compat_net"
- mechanism. Now that the major Linux distributions have moved to
- Secmark, it is time to deprecate the older mechanism and start the
- process of removing the old code.
-Who: Paul Moore <paul.moore@...com>
----------------------------
-
What: sysfs ui for changing p4-clockmod parameters
When: September 2009
Why: See commits 129f8ae9b1b5be94517da76009ea956e89104ce8 and
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index fa4e123..d1b0827 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -2019,15 +2019,6 @@ and is between 256 and 4096 characters. It is defined in the file
If enabled at boot time, /selinux/disable can be used
later to disable prior to initial policy load.
- selinux_compat_net =
- [SELINUX] Set initial selinux_compat_net flag value.
- Format: { "0" | "1" }
- 0 -- use new secmark-based packet controls
- 1 -- use legacy packet controls
- Default value is 0 (preferred).
- Value can be changed at runtime via
- /selinux/compat_net.
-
serialnumber [BUGS=X86-32]
shapers= [NET]
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index ee2e781..ba808ef 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -93,7 +93,6 @@
extern unsigned int policydb_loaded_version;
extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm);
-extern int selinux_compat_net;
extern struct security_operations *security_ops;
/* SECMARK reference count */
@@ -4019,72 +4018,6 @@ static int selinux_inet_sys_rcv_skb(int ifindex, char *addrp, u16 family,
SECCLASS_NODE, NODE__RECVFROM, ad);
}
-static int selinux_sock_rcv_skb_iptables_compat(struct sock *sk,
- struct sk_buff *skb,
- struct avc_audit_data *ad,
- u16 family,
- char *addrp)
-{
- int err;
- struct sk_security_struct *sksec = sk->sk_security;
- u16 sk_class;
- u32 netif_perm, node_perm, recv_perm;
- u32 port_sid, node_sid, if_sid, sk_sid;
-
- sk_sid = sksec->sid;
- sk_class = sksec->sclass;
-
- switch (sk_class) {
- case SECCLASS_UDP_SOCKET:
- netif_perm = NETIF__UDP_RECV;
- node_perm = NODE__UDP_RECV;
- recv_perm = UDP_SOCKET__RECV_MSG;
- break;
- case SECCLASS_TCP_SOCKET:
- netif_perm = NETIF__TCP_RECV;
- 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;
- recv_perm = 0;
- break;
- }
-
- err = sel_netif_sid(skb->iif, &if_sid);
- if (err)
- return err;
- err = avc_has_perm(sk_sid, if_sid, SECCLASS_NETIF, netif_perm, ad);
- if (err)
- return err;
-
- err = sel_netnode_sid(addrp, family, &node_sid);
- if (err)
- return err;
- err = avc_has_perm(sk_sid, node_sid, SECCLASS_NODE, node_perm, ad);
- if (err)
- return err;
-
- if (!recv_perm)
- return 0;
- err = sel_netport_sid(sk->sk_protocol,
- ntohs(ad->u.net.sport), &port_sid);
- if (unlikely(err)) {
- printk(KERN_WARNING
- "SELinux: failure in"
- " selinux_sock_rcv_skb_iptables_compat(),"
- " network port label not found\n");
- return err;
- }
- return avc_has_perm(sk_sid, port_sid, sk_class, recv_perm, ad);
-}
-
static int selinux_sock_rcv_skb_compat(struct sock *sk, struct sk_buff *skb,
u16 family)
{
@@ -4102,14 +4035,12 @@ static int selinux_sock_rcv_skb_compat(struct sock *sk, struct sk_buff *skb,
if (err)
return err;
- if (selinux_compat_net)
- err = selinux_sock_rcv_skb_iptables_compat(sk, skb, &ad,
- family, addrp);
- else if (selinux_secmark_enabled())
+ if (selinux_secmark_enabled()) {
err = avc_has_perm(sk_sid, skb->secmark, SECCLASS_PACKET,
PACKET__RECV, &ad);
- if (err)
- return err;
+ if (err)
+ return err;
+ }
if (selinux_policycap_netpeer) {
err = selinux_skb_peerlbl_sid(skb, family, &peer_sid);
@@ -4151,7 +4082,7 @@ static int selinux_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
* to the selinux_sock_rcv_skb_compat() function to deal with the
* special handling. We do this in an attempt to keep this function
* as fast and as clean as possible. */
- if (selinux_compat_net || !selinux_policycap_netpeer)
+ if (!selinux_policycap_netpeer)
return selinux_sock_rcv_skb_compat(sk, skb, family);
secmark_active = selinux_secmark_enabled();
@@ -4516,71 +4447,6 @@ static unsigned int selinux_ipv4_output(unsigned int hooknum,
return selinux_ip_output(skb, PF_INET);
}
-static int selinux_ip_postroute_iptables_compat(struct sock *sk,
- int ifindex,
- struct avc_audit_data *ad,
- u16 family, char *addrp)
-{
- int err;
- struct sk_security_struct *sksec = sk->sk_security;
- u16 sk_class;
- u32 netif_perm, node_perm, send_perm;
- u32 port_sid, node_sid, if_sid, sk_sid;
-
- sk_sid = sksec->sid;
- sk_class = sksec->sclass;
-
- switch (sk_class) {
- case SECCLASS_UDP_SOCKET:
- netif_perm = NETIF__UDP_SEND;
- node_perm = NODE__UDP_SEND;
- send_perm = UDP_SOCKET__SEND_MSG;
- break;
- case SECCLASS_TCP_SOCKET:
- netif_perm = NETIF__TCP_SEND;
- 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;
- send_perm = 0;
- break;
- }
-
- err = sel_netif_sid(ifindex, &if_sid);
- if (err)
- return err;
- err = avc_has_perm(sk_sid, if_sid, SECCLASS_NETIF, netif_perm, ad);
- return err;
-
- err = sel_netnode_sid(addrp, family, &node_sid);
- if (err)
- return err;
- err = avc_has_perm(sk_sid, node_sid, SECCLASS_NODE, node_perm, ad);
- if (err)
- return err;
-
- if (send_perm != 0)
- return 0;
-
- err = sel_netport_sid(sk->sk_protocol,
- ntohs(ad->u.net.dport), &port_sid);
- if (unlikely(err)) {
- printk(KERN_WARNING
- "SELinux: failure in"
- " selinux_ip_postroute_iptables_compat(),"
- " network port label not found\n");
- return err;
- }
- return avc_has_perm(sk_sid, port_sid, sk_class, send_perm, ad);
-}
-
static unsigned int selinux_ip_postroute_compat(struct sk_buff *skb,
int ifindex,
u16 family)
@@ -4601,15 +4467,10 @@ static unsigned int selinux_ip_postroute_compat(struct sk_buff *skb,
if (selinux_parse_skb(skb, &ad, &addrp, 0, &proto))
return NF_DROP;
- if (selinux_compat_net) {
- if (selinux_ip_postroute_iptables_compat(skb->sk, ifindex,
- &ad, family, addrp))
- return NF_DROP;
- } else if (selinux_secmark_enabled()) {
+ if (selinux_secmark_enabled())
if (avc_has_perm(sksec->sid, skb->secmark,
SECCLASS_PACKET, PACKET__SEND, &ad))
return NF_DROP;
- }
if (selinux_policycap_netpeer)
if (selinux_xfrm_postroute_last(sksec->sid, skb, &ad, proto))
@@ -4633,7 +4494,7 @@ static unsigned int selinux_ip_postroute(struct sk_buff *skb, int ifindex,
* to the selinux_ip_postroute_compat() function to deal with the
* special handling. We do this in an attempt to keep this function
* as fast and as clean as possible. */
- if (selinux_compat_net || !selinux_policycap_netpeer)
+ if (!selinux_policycap_netpeer)
return selinux_ip_postroute_compat(skb, ifindex, family);
#ifdef CONFIG_XFRM
/* If skb->dst->xfrm is non-NULL then the packet is undergoing an IPsec
diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index d3c8b98..2d5136e 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -47,8 +47,6 @@ static char *policycap_names[] = {
unsigned int selinux_checkreqprot = CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE;
-int selinux_compat_net = 0;
-
static int __init checkreqprot_setup(char *str)
{
unsigned long checkreqprot;
@@ -58,16 +56,6 @@ static int __init checkreqprot_setup(char *str)
}
__setup("checkreqprot=", checkreqprot_setup);
-static int __init selinux_compat_net_setup(char *str)
-{
- unsigned long compat_net;
- if (!strict_strtoul(str, 0, &compat_net))
- selinux_compat_net = compat_net ? 1 : 0;
- return 1;
-}
-__setup("selinux_compat_net=", selinux_compat_net_setup);
-
-
static DEFINE_MUTEX(sel_mutex);
/* global data for booleans */
@@ -450,61 +438,6 @@ static const struct file_operations sel_checkreqprot_ops = {
.write = sel_write_checkreqprot,
};
-static ssize_t sel_read_compat_net(struct file *filp, char __user *buf,
- size_t count, loff_t *ppos)
-{
- char tmpbuf[TMPBUFLEN];
- ssize_t length;
-
- length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_compat_net);
- return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
-}
-
-static ssize_t sel_write_compat_net(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- char *page;
- ssize_t length;
- int new_value;
-
- length = task_has_security(current, SECURITY__LOAD_POLICY);
- if (length)
- return length;
-
- if (count >= PAGE_SIZE)
- return -ENOMEM;
- if (*ppos != 0) {
- /* No partial writes. */
- return -EINVAL;
- }
- page = (char *)get_zeroed_page(GFP_KERNEL);
- if (!page)
- return -ENOMEM;
- length = -EFAULT;
- if (copy_from_user(page, buf, count))
- goto out;
-
- length = -EINVAL;
- if (sscanf(page, "%d", &new_value) != 1)
- goto out;
-
- if (new_value) {
- printk(KERN_NOTICE
- "SELinux: compat_net is deprecated, please use secmark"
- " instead\n");
- selinux_compat_net = 1;
- } else
- selinux_compat_net = 0;
- length = count;
-out:
- free_page((unsigned long) page);
- return length;
-}
-static const struct file_operations sel_compat_net_ops = {
- .read = sel_read_compat_net,
- .write = sel_write_compat_net,
-};
-
/*
* Remaining nodes use transaction based IO methods like nfsd/nfsctl.c
*/
@@ -1665,7 +1598,6 @@ static int sel_fill_super(struct super_block *sb, void *data, int silent)
[SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR},
[SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO},
[SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR},
- [SEL_COMPAT_NET] = {"compat_net", &sel_compat_net_ops, S_IRUGO|S_IWUSR},
[SEL_REJECT_UNKNOWN] = {"reject_unknown", &sel_handle_unknown_ops, S_IRUGO},
[SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO},
/* last one */ {""}
--
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