From: Cong Wang <[email protected]>
selinux has some similar definition like union inet_addr,
it can re-use the generic union inet_addr too.
Cc: James Morris <[email protected]>
Cc: Stephen Smalley <[email protected]>
Cc: Eric Paris <[email protected]>
Cc: Paul Moore <[email protected]>
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Cong Wang <[email protected]>
---
include/linux/lsm_audit.h | 16 +-----
security/lsm_audit.c | 16 +++---
security/selinux/hooks.c | 73 ++++++++++----------------
security/selinux/include/netnode.h | 4 +-
security/selinux/include/objsec.h | 7 +--
security/selinux/netnode.c | 102 +++++++++++-------------------------
6 files changed, 74 insertions(+), 144 deletions(-)
diff --git a/include/linux/lsm_audit.h b/include/linux/lsm_audit.h
index 1cc89e9..db7c0d6 100644
--- a/include/linux/lsm_audit.h
+++ b/include/linux/lsm_audit.h
@@ -21,6 +21,7 @@
#include <linux/path.h>
#include <linux/key.h>
#include <linux/skbuff.h>
+#include <net/inet_addr.h>
struct lsm_network_audit {
int netif;
@@ -28,16 +29,8 @@ struct lsm_network_audit {
u16 family;
__be16 dport;
__be16 sport;
- union {
- struct {
- __be32 daddr;
- __be32 saddr;
- } v4;
- struct {
- struct in6_addr daddr;
- struct in6_addr saddr;
- } v6;
- } fam;
+ union inet_addr saddr;
+ union inet_addr daddr;
};
/* Auxiliary data to use in generating the audit record. */
@@ -83,9 +76,6 @@ struct common_audit_data {
}; /* per LSM data pointer union */
};
-#define v4info fam.v4
-#define v6info fam.v6
-
int ipv4_skb_to_auditdata(struct sk_buff *skb,
struct common_audit_data *ad, u8 *proto);
diff --git a/security/lsm_audit.c b/security/lsm_audit.c
index 8d8d97d..f30862b 100644
--- a/security/lsm_audit.c
+++ b/security/lsm_audit.c
@@ -49,8 +49,8 @@ int ipv4_skb_to_auditdata(struct sk_buff *skb,
if (ih == NULL)
return -EINVAL;
- ad->u.net->v4info.saddr = ih->saddr;
- ad->u.net->v4info.daddr = ih->daddr;
+ ad->u.net->saddr.sin.sin_addr.s_addr = ih->saddr;
+ ad->u.net->daddr.sin.sin_addr.s_addr = ih->daddr;
if (proto)
*proto = ih->protocol;
@@ -119,8 +119,8 @@ int ipv6_skb_to_auditdata(struct sk_buff *skb,
ip6 = ipv6_hdr(skb);
if (ip6 == NULL)
return -EINVAL;
- ad->u.net->v6info.saddr = ip6->saddr;
- ad->u.net->v6info.daddr = ip6->daddr;
+ ad->u.net->saddr.sin6.sin6_addr = ip6->saddr;
+ ad->u.net->daddr.sin6.sin6_addr = ip6->daddr;
ret = 0;
/* IPv6 can have several extension header before the Transport header
* skip them */
@@ -335,18 +335,18 @@ static void dump_common_audit_data(struct audit_buffer *ab,
switch (a->u.net->family) {
case AF_INET:
- print_ipv4_addr(ab, a->u.net->v4info.saddr,
+ print_ipv4_addr(ab, a->u.net->saddr.sin.sin_addr.s_addr,
a->u.net->sport,
"saddr", "src");
- print_ipv4_addr(ab, a->u.net->v4info.daddr,
+ print_ipv4_addr(ab, a->u.net->daddr.sin.sin_addr.s_addr,
a->u.net->dport,
"daddr", "dest");
break;
case AF_INET6:
- print_ipv6_addr(ab, &a->u.net->v6info.saddr,
+ print_ipv6_addr(ab, &a->u.net->saddr.sin6.sin6_addr,
a->u.net->sport,
"saddr", "src");
- print_ipv6_addr(ab, &a->u.net->v6info.daddr,
+ print_ipv6_addr(ab, &a->u.net->daddr.sin6.sin6_addr,
a->u.net->dport,
"daddr", "dest");
break;
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index c956390..6b17c8d 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -3595,8 +3595,8 @@ static int selinux_parse_skb_ipv4(struct sk_buff *skb,
if (ihlen < sizeof(_iph))
goto out;
- ad->u.net->v4info.saddr = ih->saddr;
- ad->u.net->v4info.daddr = ih->daddr;
+ ad->u.net->saddr.sin.sin_addr.s_addr = ih->saddr;
+ ad->u.net->daddr.sin.sin_addr.s_addr = ih->daddr;
ret = 0;
if (proto)
@@ -3674,8 +3674,8 @@ static int selinux_parse_skb_ipv6(struct sk_buff *skb,
if (ip6 == NULL)
goto out;
- ad->u.net->v6info.saddr = ip6->saddr;
- ad->u.net->v6info.daddr = ip6->daddr;
+ ad->u.net->saddr.sin6.sin6_addr = ip6->saddr;
+ ad->u.net->daddr.sin6.sin6_addr = ip6->daddr;
ret = 0;
nexthdr = ip6->nexthdr;
@@ -3735,9 +3735,9 @@ out:
#endif /* IPV6 */
static int selinux_parse_skb(struct sk_buff *skb, struct common_audit_data *ad,
- char **_addrp, int src, u8 *proto)
+ union inet_addr **_addrp, int src, u8 *proto)
{
- char *addrp;
+ union inet_addr *addrp;
int ret;
switch (ad->u.net->family) {
@@ -3745,8 +3745,6 @@ static int selinux_parse_skb(struct sk_buff *skb, struct common_audit_data *ad,
ret = selinux_parse_skb_ipv4(skb, ad, proto);
if (ret)
goto parse_error;
- addrp = (char *)(src ? &ad->u.net->v4info.saddr :
- &ad->u.net->v4info.daddr);
goto okay;
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
@@ -3754,13 +3752,11 @@ static int selinux_parse_skb(struct sk_buff *skb, struct common_audit_data *ad,
ret = selinux_parse_skb_ipv6(skb, ad, proto);
if (ret)
goto parse_error;
- addrp = (char *)(src ? &ad->u.net->v6info.saddr :
- &ad->u.net->v6info.daddr);
goto okay;
#endif /* IPV6 */
default:
addrp = NULL;
- goto okay;
+ goto save;
}
parse_error:
@@ -3770,6 +3766,8 @@ parse_error:
return ret;
okay:
+ addrp = src ? &ad->u.net->saddr : &ad->u.net->daddr;
+save:
if (_addrp)
*_addrp = addrp;
return 0;
@@ -3912,25 +3910,15 @@ static int selinux_socket_bind(struct socket *sock, struct sockaddr *address, in
*/
family = sk->sk_family;
if (family == PF_INET || family == PF_INET6) {
- char *addrp;
+ union inet_addr *addrp = (union inet_addr *)address;
struct sk_security_struct *sksec = sk->sk_security;
struct common_audit_data ad;
struct lsm_network_audit net = {0,};
- struct sockaddr_in *addr4 = NULL;
- struct sockaddr_in6 *addr6 = NULL;
unsigned short snum;
u32 sid, node_perm;
- if (family == PF_INET) {
- addr4 = (struct sockaddr_in *)address;
- snum = ntohs(addr4->sin_port);
- addrp = (char *)&addr4->sin_addr.s_addr;
- } else {
- addr6 = (struct sockaddr_in6 *)address;
- snum = ntohs(addr6->sin6_port);
- addrp = (char *)&addr6->sin6_addr.s6_addr;
- }
-
+ addrp->sa.sa_family = family;
+ snum = inet_addr_get_port(addrp);
if (snum) {
int low, high;
@@ -3971,7 +3959,7 @@ static int selinux_socket_bind(struct socket *sock, struct sockaddr *address, in
break;
}
- err = sel_netnode_sid(addrp, family, &sid);
+ err = sel_netnode_sid(addrp, &sid);
if (err)
goto out;
@@ -3980,10 +3968,7 @@ static int selinux_socket_bind(struct socket *sock, struct sockaddr *address, in
ad.u.net->sport = htons(snum);
ad.u.net->family = family;
- if (family == PF_INET)
- ad.u.net->v4info.saddr = addr4->sin_addr.s_addr;
- else
- ad.u.net->v6info.saddr = addr6->sin6_addr;
+ ad.u.net->saddr = *addrp;
err = avc_has_perm(sksec->sid, sid,
sksec->sclass, node_perm, &ad);
@@ -4011,22 +3996,18 @@ static int selinux_socket_connect(struct socket *sock, struct sockaddr *address,
sksec->sclass == SECCLASS_DCCP_SOCKET) {
struct common_audit_data ad;
struct lsm_network_audit net = {0,};
- struct sockaddr_in *addr4 = NULL;
- struct sockaddr_in6 *addr6 = NULL;
+ union inet_addr *addrp = (union inet_addr *)address;
unsigned short snum;
u32 sid, perm;
if (sk->sk_family == PF_INET) {
- addr4 = (struct sockaddr_in *)address;
if (addrlen < sizeof(struct sockaddr_in))
return -EINVAL;
- snum = ntohs(addr4->sin_port);
} else {
- addr6 = (struct sockaddr_in6 *)address;
if (addrlen < SIN6_LEN_RFC2133)
return -EINVAL;
- snum = ntohs(addr6->sin6_port);
}
+ snum = inet_addr_get_port(addrp);
err = sel_netport_sid(sk->sk_protocol, snum, &sid);
if (err)
@@ -4169,7 +4150,7 @@ static int selinux_socket_unix_may_send(struct socket *sock,
&ad);
}
-static int selinux_inet_sys_rcv_skb(int ifindex, char *addrp, u16 family,
+static int selinux_inet_sys_rcv_skb(int ifindex, union inet_addr *addrp,
u32 peer_sid,
struct common_audit_data *ad)
{
@@ -4185,7 +4166,7 @@ static int selinux_inet_sys_rcv_skb(int ifindex, char *addrp, u16 family,
if (err)
return err;
- err = sel_netnode_sid(addrp, family, &node_sid);
+ err = sel_netnode_sid(addrp, &node_sid);
if (err)
return err;
return avc_has_perm(peer_sid, node_sid,
@@ -4200,7 +4181,7 @@ static int selinux_sock_rcv_skb_compat(struct sock *sk, struct sk_buff *skb,
u32 sk_sid = sksec->sid;
struct common_audit_data ad;
struct lsm_network_audit net = {0,};
- char *addrp;
+ union inet_addr *addrp;
ad.type = LSM_AUDIT_DATA_NET;
ad.u.net = &net;
@@ -4233,7 +4214,7 @@ static int selinux_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
u32 sk_sid = sksec->sid;
struct common_audit_data ad;
struct lsm_network_audit net = {0,};
- char *addrp;
+ union inet_addr *addrp;
u8 secmark_active;
u8 peerlbl_active;
@@ -4270,7 +4251,8 @@ static int selinux_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
err = selinux_skb_peerlbl_sid(skb, family, &peer_sid);
if (err)
return err;
- err = selinux_inet_sys_rcv_skb(skb->skb_iif, addrp, family,
+ addrp->sa.sa_family = family;
+ err = selinux_inet_sys_rcv_skb(skb->skb_iif, addrp,
peer_sid, &ad);
if (err) {
selinux_netlbl_err(skb, err, 0);
@@ -4621,7 +4603,7 @@ static unsigned int selinux_ip_forward(struct sk_buff *skb, int ifindex,
u16 family)
{
int err;
- char *addrp;
+ union inet_addr *addrp;
u32 peer_sid;
struct common_audit_data ad;
struct lsm_network_audit net = {0,};
@@ -4649,7 +4631,8 @@ static unsigned int selinux_ip_forward(struct sk_buff *skb, int ifindex,
return NF_DROP;
if (peerlbl_active) {
- err = selinux_inet_sys_rcv_skb(ifindex, addrp, family,
+ addrp->sa.sa_family = family;
+ err = selinux_inet_sys_rcv_skb(ifindex, addrp,
peer_sid, &ad);
if (err) {
selinux_netlbl_err(skb, err, 1);
@@ -4732,7 +4715,7 @@ static unsigned int selinux_ip_postroute_compat(struct sk_buff *skb,
struct sk_security_struct *sksec;
struct common_audit_data ad;
struct lsm_network_audit net = {0,};
- char *addrp;
+ union inet_addr *addrp;
u8 proto;
if (sk == NULL)
@@ -4765,7 +4748,7 @@ static unsigned int selinux_ip_postroute(struct sk_buff *skb, int ifindex,
struct sock *sk;
struct common_audit_data ad;
struct lsm_network_audit net = {0,};
- char *addrp;
+ union inet_addr *addrp;
u8 secmark_active;
u8 peerlbl_active;
@@ -4832,7 +4815,7 @@ static unsigned int selinux_ip_postroute(struct sk_buff *skb, int ifindex,
SECCLASS_NETIF, NETIF__EGRESS, &ad))
return NF_DROP_ERR(-ECONNREFUSED);
- if (sel_netnode_sid(addrp, family, &node_sid))
+ if (sel_netnode_sid(addrp, &node_sid))
return NF_DROP;
if (avc_has_perm(peer_sid, node_sid,
SECCLASS_NODE, NODE__SENDTO, &ad))
diff --git a/security/selinux/include/netnode.h b/security/selinux/include/netnode.h
index df7a5ed..f32c909 100644
--- a/security/selinux/include/netnode.h
+++ b/security/selinux/include/netnode.h
@@ -27,6 +27,8 @@
#ifndef _SELINUX_NETNODE_H
#define _SELINUX_NETNODE_H
-int sel_netnode_sid(void *addr, u16 family, u32 *sid);
+#include <net/inet_addr.h>
+
+int sel_netnode_sid(union inet_addr *addr, u32 *sid);
#endif
diff --git a/security/selinux/include/objsec.h b/security/selinux/include/objsec.h
index aa47bca..a46caaf 100644
--- a/security/selinux/include/objsec.h
+++ b/security/selinux/include/objsec.h
@@ -24,6 +24,7 @@
#include <linux/binfmts.h>
#include <linux/in.h>
#include <linux/spinlock.h>
+#include <net/inet_addr.h>
#include "flask.h"
#include "avc.h"
@@ -80,12 +81,8 @@ struct netif_security_struct {
};
struct netnode_security_struct {
- union {
- __be32 ipv4; /* IPv4 node address */
- struct in6_addr ipv6; /* IPv6 node address */
- } addr;
+ union inet_addr addr;
u32 sid; /* SID for this node */
- u16 family; /* address family */
};
struct netport_security_struct {
diff --git a/security/selinux/netnode.c b/security/selinux/netnode.c
index c5454c0..713f14e 100644
--- a/security/selinux/netnode.c
+++ b/security/selinux/netnode.c
@@ -68,79 +68,49 @@ static LIST_HEAD(sel_netnode_list);
static DEFINE_SPINLOCK(sel_netnode_lock);
static struct sel_netnode_bkt sel_netnode_hash[SEL_NETNODE_HASH_SIZE];
-/**
- * sel_netnode_hashfn_ipv4 - IPv4 hashing function for the node table
- * @addr: IPv4 address
- *
- * Description:
- * This is the IPv4 hashing function for the node interface table, it returns
- * the bucket number for the given IP address.
- *
- */
-static unsigned int sel_netnode_hashfn_ipv4(__be32 addr)
-{
- /* at some point we should determine if the mismatch in byte order
- * affects the hash function dramatically */
- return (addr & (SEL_NETNODE_HASH_SIZE - 1));
-}
/**
- * sel_netnode_hashfn_ipv6 - IPv6 hashing function for the node table
- * @addr: IPv6 address
+ * sel_netnode_hashfn - IPv4/IPv6 hashing function for the node table
+ * @addr: generic IP address
*
* Description:
- * This is the IPv6 hashing function for the node interface table, it returns
+ * This is the IP hashing function for the node interface table, it returns
* the bucket number for the given IP address.
*
*/
-static unsigned int sel_netnode_hashfn_ipv6(const struct in6_addr *addr)
+static unsigned int sel_netnode_hashfn(const union inet_addr *addr)
{
- /* just hash the least significant 32 bits to keep things fast (they
- * are the most likely to be different anyway), we can revisit this
- * later if needed */
- return (addr->s6_addr32[3] & (SEL_NETNODE_HASH_SIZE - 1));
+ if (addr->sa.sa_family == PF_INET)
+ /* at some point we should determine if the mismatch in byte order
+ * affects the hash function dramatically */
+ return (addr->sin.sin_addr.s_addr & (SEL_NETNODE_HASH_SIZE - 1));
+ else if (addr->sa.sa_family == PF_INET6)
+ /* just hash the least significant 32 bits to keep things fast (they
+ * are the most likely to be different anyway), we can revisit this
+ * later if needed */
+ return (addr->sin6.sin6_addr.s6_addr32[3] & (SEL_NETNODE_HASH_SIZE - 1));
+ else
+ BUG();
}
/**
* sel_netnode_find - Search for a node record
* @addr: IP address
- * @family: address family
*
* Description:
* Search the network node table and return the record matching @addr. If an
* entry can not be found in the table return NULL.
*
*/
-static struct sel_netnode *sel_netnode_find(const void *addr, u16 family)
+static struct sel_netnode *sel_netnode_find(const union inet_addr *addr)
{
unsigned int idx;
struct sel_netnode *node;
- switch (family) {
- case PF_INET:
- idx = sel_netnode_hashfn_ipv4(*(__be32 *)addr);
- break;
- case PF_INET6:
- idx = sel_netnode_hashfn_ipv6(addr);
- break;
- default:
- BUG();
- return NULL;
- }
-
+ idx = sel_netnode_hashfn(addr);
list_for_each_entry_rcu(node, &sel_netnode_hash[idx].list, list)
- if (node->nsec.family == family)
- switch (family) {
- case PF_INET:
- if (node->nsec.addr.ipv4 == *(__be32 *)addr)
- return node;
- break;
- case PF_INET6:
- if (ipv6_addr_equal(&node->nsec.addr.ipv6,
- addr))
- return node;
- break;
- }
+ if (inet_addr_equal(&node->nsec.addr, addr))
+ return node;
return NULL;
}
@@ -156,18 +126,9 @@ static struct sel_netnode *sel_netnode_find(const void *addr, u16 family)
static void sel_netnode_insert(struct sel_netnode *node)
{
unsigned int idx;
+ union inet_addr *addr = &node->nsec.addr;
- switch (node->nsec.family) {
- case PF_INET:
- idx = sel_netnode_hashfn_ipv4(node->nsec.addr.ipv4);
- break;
- case PF_INET6:
- idx = sel_netnode_hashfn_ipv6(&node->nsec.addr.ipv6);
- break;
- default:
- BUG();
- }
-
+ idx = sel_netnode_hashfn(addr);
/* we need to impose a limit on the growth of the hash table so check
* this bucket to make sure it is within the specified bounds */
list_add_rcu(&node->list, &sel_netnode_hash[idx].list);
@@ -186,7 +147,6 @@ static void sel_netnode_insert(struct sel_netnode *node)
/**
* sel_netnode_sid_slow - Lookup the SID of a network address using the policy
* @addr: the IP address
- * @family: the address family
* @sid: node SID
*
* Description:
@@ -196,14 +156,14 @@ static void sel_netnode_insert(struct sel_netnode *node)
* failure.
*
*/
-static int sel_netnode_sid_slow(void *addr, u16 family, u32 *sid)
+static int sel_netnode_sid_slow(union inet_addr *addr, u32 *sid)
{
int ret = -ENOMEM;
struct sel_netnode *node;
struct sel_netnode *new = NULL;
spin_lock_bh(&sel_netnode_lock);
- node = sel_netnode_find(addr, family);
+ node = sel_netnode_find(addr);
if (node != NULL) {
*sid = node->nsec.sid;
spin_unlock_bh(&sel_netnode_lock);
@@ -212,16 +172,16 @@ static int sel_netnode_sid_slow(void *addr, u16 family, u32 *sid)
new = kzalloc(sizeof(*new), GFP_ATOMIC);
if (new == NULL)
goto out;
- switch (family) {
+ switch (addr->sa.sa_family) {
case PF_INET:
ret = security_node_sid(PF_INET,
addr, sizeof(struct in_addr), sid);
- new->nsec.addr.ipv4 = *(__be32 *)addr;
+ new->nsec.addr = *addr;
break;
case PF_INET6:
ret = security_node_sid(PF_INET6,
addr, sizeof(struct in6_addr), sid);
- new->nsec.addr.ipv6 = *(struct in6_addr *)addr;
+ new->nsec.addr = *addr;
break;
default:
BUG();
@@ -229,7 +189,6 @@ static int sel_netnode_sid_slow(void *addr, u16 family, u32 *sid)
if (ret != 0)
goto out;
- new->nsec.family = family;
new->nsec.sid = *sid;
sel_netnode_insert(new);
@@ -246,8 +205,7 @@ out:
/**
* sel_netnode_sid - Lookup the SID of a network address
- * @addr: the IP address
- * @family: the address family
+ * @addr: the generic IP address
* @sid: node SID
*
* Description:
@@ -258,12 +216,12 @@ out:
* on failure.
*
*/
-int sel_netnode_sid(void *addr, u16 family, u32 *sid)
+int sel_netnode_sid(union inet_addr *addr, u32 *sid)
{
struct sel_netnode *node;
rcu_read_lock();
- node = sel_netnode_find(addr, family);
+ node = sel_netnode_find(addr);
if (node != NULL) {
*sid = node->nsec.sid;
rcu_read_unlock();
@@ -271,7 +229,7 @@ int sel_netnode_sid(void *addr, u16 family, u32 *sid)
}
rcu_read_unlock();
- return sel_netnode_sid_slow(addr, family, sid);
+ return sel_netnode_sid_slow(addr, sid);
}
/**
--
1.7.7.6
On Monday, July 22, 2013 03:05:13 PM Cong Wang wrote:
> diff --git a/include/linux/lsm_audit.h b/include/linux/lsm_audit.h
> index 1cc89e9..db7c0d6 100644
> --- a/include/linux/lsm_audit.h
> +++ b/include/linux/lsm_audit.h
> @@ -21,6 +21,7 @@
> #include <linux/path.h>
> #include <linux/key.h>
> #include <linux/skbuff.h>
> +#include <net/inet_addr.h>
>
> struct lsm_network_audit {
> int netif;
> @@ -28,16 +29,8 @@ struct lsm_network_audit {
> u16 family;
> __be16 dport;
> __be16 sport;
> - union {
> - struct {
> - __be32 daddr;
> - __be32 saddr;
> - } v4;
> - struct {
> - struct in6_addr daddr;
> - struct in6_addr saddr;
> - } v6;
> - } fam;
> + union inet_addr saddr;
> + union inet_addr daddr;
> };
>
> /* Auxiliary data to use in generating the audit record. */
> @@ -83,9 +76,6 @@ struct common_audit_data {
> }; /* per LSM data pointer union */
> };
>
> -#define v4info fam.v4
> -#define v6info fam.v6
These changes are going to affect Smack as well. You either need to respin
this patch to include all of the LSMs (Smack should be the only other affected
LSM) or add a new patch to the patchset.
--
paul moore
security and virtualization @ redhat
On Mon, 2013-07-22 at 16:36 -0400, Paul Moore wrote:
>
> These changes are going to affect Smack as well. You either need to respin
> this patch to include all of the LSMs (Smack should be the only other affected
> LSM) or add a new patch to the patchset.
>
Yeah, I will include the Smack part as well.
Thanks!