Merge branch 'audit.b3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit...

[pandora-kernel.git] / security / selinux / hooks.c

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 81b726b..b61b955 100644 (file)
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -117,6 +117,8 @@ static struct security_operations *secondary_ops = NULL;
 static LIST_HEAD(superblock_security_head);
 static DEFINE_SPINLOCK(sb_security_lock);
 
+static kmem_cache_t *sel_inode_cache;
+
 /* Return security context for a given sid or just the context 
    length if the buffer is null or length is 0 */
 static int selinux_getsecurity(u32 sid, void *buffer, size_t size)
@@ -172,10 +174,11 @@ static int inode_alloc_security(struct inode *inode)
        struct task_security_struct *tsec = current->security;
        struct inode_security_struct *isec;
 
-       isec = kzalloc(sizeof(struct inode_security_struct), GFP_KERNEL);
+       isec = kmem_cache_alloc(sel_inode_cache, SLAB_KERNEL);
        if (!isec)
                return -ENOMEM;
 
+       memset(isec, 0, sizeof(*isec));
        init_MUTEX(&isec->sem);
        INIT_LIST_HEAD(&isec->list);
        isec->inode = inode;
@@ -198,7 +201,7 @@ static void inode_free_security(struct inode *inode)
        spin_unlock(&sbsec->isec_lock);
 
        inode->i_security = NULL;
-       kfree(isec);
+       kmem_cache_free(sel_inode_cache, isec);
 }
 
 static int file_alloc_security(struct file *file)
@@ -1955,7 +1958,6 @@ static int selinux_inode_init_security(struct inode *inode, struct inode *dir,
        struct task_security_struct *tsec;
        struct inode_security_struct *dsec;
        struct superblock_security_struct *sbsec;
-       struct inode_security_struct *isec;
        u32 newsid, clen;
        int rc;
        char *namep = NULL, *context;
@@ -1963,7 +1965,6 @@ static int selinux_inode_init_security(struct inode *inode, struct inode *dir,
        tsec = current->security;
        dsec = dir->i_security;
        sbsec = dir->i_sb->s_security;
-       isec = inode->i_security;
 
        if (tsec->create_sid && sbsec->behavior != SECURITY_FS_USE_MNTPOINT) {
                newsid = tsec->create_sid;
@@ -1983,7 +1984,7 @@ static int selinux_inode_init_security(struct inode *inode, struct inode *dir,
 
        inode_security_set_sid(inode, newsid);
 
-       if (sbsec->behavior == SECURITY_FS_USE_MNTPOINT)
+       if (!ss_initialized || sbsec->behavior == SECURITY_FS_USE_MNTPOINT)
                return -EOPNOTSUPP;
 
        if (name) {
@@ -3316,24 +3317,38 @@ out:
        return err;
 }
 
-static int selinux_socket_getpeersec(struct socket *sock, char __user *optval,
-                                    int __user *optlen, unsigned len)
+static int selinux_socket_getpeersec_stream(struct socket *sock, char __user *optval,
+                                           int __user *optlen, unsigned len)
 {
        int err = 0;
        char *scontext;
        u32 scontext_len;
        struct sk_security_struct *ssec;
        struct inode_security_struct *isec;
+       u32 peer_sid = 0;
 
        isec = SOCK_INODE(sock)->i_security;
-       if (isec->sclass != SECCLASS_UNIX_STREAM_SOCKET) {
+
+       /* if UNIX_STREAM check peer_sid, if TCP check dst for labelled sa */
+       if (isec->sclass == SECCLASS_UNIX_STREAM_SOCKET) {
+               ssec = sock->sk->sk_security;
+               peer_sid = ssec->peer_sid;
+       }
+       else if (isec->sclass == SECCLASS_TCP_SOCKET) {
+               peer_sid = selinux_socket_getpeer_stream(sock->sk);
+
+               if (peer_sid == SECSID_NULL) {
+                       err = -ENOPROTOOPT;
+                       goto out;
+               }
+       }
+       else {
                err = -ENOPROTOOPT;
                goto out;
        }
 
-       ssec = sock->sk->sk_security;
-       
-       err = security_sid_to_context(ssec->peer_sid, &scontext, &scontext_len);
+       err = security_sid_to_context(peer_sid, &scontext, &scontext_len);
+
        if (err)
                goto out;
 
@@ -3354,6 +3369,23 @@ out:
        return err;
 }
 
+static int selinux_socket_getpeersec_dgram(struct sk_buff *skb, char **secdata, u32 *seclen)
+{
+       int err = 0;
+       u32 peer_sid = selinux_socket_getpeer_dgram(skb);
+
+       if (peer_sid == SECSID_NULL)
+               return -EINVAL;
+
+       err = security_sid_to_context(peer_sid, secdata, seclen);
+       if (err)
+               return err;
+
+       return 0;
+}
+
+
+
 static int selinux_sk_alloc_security(struct sock *sk, int family, gfp_t priority)
 {
        return sk_alloc_security(sk, family, priority);
@@ -4338,7 +4370,8 @@ static struct security_operations selinux_ops = {
        .socket_setsockopt =            selinux_socket_setsockopt,
        .socket_shutdown =              selinux_socket_shutdown,
        .socket_sock_rcv_skb =          selinux_socket_sock_rcv_skb,
-       .socket_getpeersec =            selinux_socket_getpeersec,
+       .socket_getpeersec_stream =     selinux_socket_getpeersec_stream,
+       .socket_getpeersec_dgram =      selinux_socket_getpeersec_dgram,
        .sk_alloc_security =            selinux_sk_alloc_security,
        .sk_free_security =             selinux_sk_free_security,
        .sk_getsid =                    selinux_sk_getsid_security,
@@ -4370,6 +4403,9 @@ static __init int selinux_init(void)
        tsec = current->security;
        tsec->osid = tsec->sid = SECINITSID_KERNEL;
 
+       sel_inode_cache = kmem_cache_create("selinux_inode_security",
+                                           sizeof(struct inode_security_struct),
+                                           0, SLAB_PANIC, NULL, NULL);
        avc_init();
 
        original_ops = secondary_ops = security_ops;