Merge branch 'smack-for-4.11' of git://github.com/cschaufler/smack-next into next
This commit is contained in:
commit
710584b9da
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@ -114,6 +114,7 @@ struct inode_smack {
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struct smack_known *smk_mmap; /* label of the mmap domain */
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struct mutex smk_lock; /* initialization lock */
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int smk_flags; /* smack inode flags */
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struct rcu_head smk_rcu; /* for freeing inode_smack */
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};
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struct task_smack {
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@ -173,6 +174,8 @@ struct smk_port_label {
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unsigned short smk_port; /* the port number */
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struct smack_known *smk_in; /* inbound label */
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struct smack_known *smk_out; /* outgoing label */
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short smk_sock_type; /* Socket type */
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short smk_can_reuse;
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};
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#endif /* SMACK_IPV6_PORT_LABELING */
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@ -52,6 +52,7 @@
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#define SMK_SENDING 2
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#ifdef SMACK_IPV6_PORT_LABELING
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DEFINE_MUTEX(smack_ipv6_lock);
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static LIST_HEAD(smk_ipv6_port_list);
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#endif
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static struct kmem_cache *smack_inode_cache;
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@ -347,8 +348,6 @@ static int smk_copy_rules(struct list_head *nhead, struct list_head *ohead,
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struct smack_rule *orp;
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int rc = 0;
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INIT_LIST_HEAD(nhead);
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list_for_each_entry_rcu(orp, ohead, list) {
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nrp = kzalloc(sizeof(struct smack_rule), gfp);
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if (nrp == NULL) {
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@ -375,8 +374,6 @@ static int smk_copy_relabel(struct list_head *nhead, struct list_head *ohead,
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struct smack_known_list_elem *nklep;
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struct smack_known_list_elem *oklep;
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INIT_LIST_HEAD(nhead);
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list_for_each_entry(oklep, ohead, list) {
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nklep = kzalloc(sizeof(struct smack_known_list_elem), gfp);
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if (nklep == NULL) {
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@ -1009,15 +1006,39 @@ static int smack_inode_alloc_security(struct inode *inode)
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}
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/**
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* smack_inode_free_security - free an inode blob
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* smack_inode_free_rcu - Free inode_smack blob from cache
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* @head: the rcu_head for getting inode_smack pointer
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*
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* Call back function called from call_rcu() to free
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* the i_security blob pointer in inode
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*/
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static void smack_inode_free_rcu(struct rcu_head *head)
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{
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struct inode_smack *issp;
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issp = container_of(head, struct inode_smack, smk_rcu);
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kmem_cache_free(smack_inode_cache, issp);
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}
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/**
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* smack_inode_free_security - free an inode blob using call_rcu()
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* @inode: the inode with a blob
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*
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* Clears the blob pointer in inode
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* Clears the blob pointer in inode using RCU
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*/
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static void smack_inode_free_security(struct inode *inode)
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{
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kmem_cache_free(smack_inode_cache, inode->i_security);
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inode->i_security = NULL;
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struct inode_smack *issp = inode->i_security;
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/*
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* The inode may still be referenced in a path walk and
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* a call to smack_inode_permission() can be made
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* after smack_inode_free_security() is called.
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* To avoid race condition free the i_security via RCU
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* and leave the current inode->i_security pointer intact.
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* The inode will be freed after the RCU grace period too.
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*/
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call_rcu(&issp->smk_rcu, smack_inode_free_rcu);
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}
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/**
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@ -1626,6 +1647,9 @@ static int smack_file_ioctl(struct file *file, unsigned int cmd,
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struct smk_audit_info ad;
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struct inode *inode = file_inode(file);
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if (unlikely(IS_PRIVATE(inode)))
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return 0;
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smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_PATH);
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smk_ad_setfield_u_fs_path(&ad, file->f_path);
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@ -1655,6 +1679,9 @@ static int smack_file_lock(struct file *file, unsigned int cmd)
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int rc;
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struct inode *inode = file_inode(file);
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if (unlikely(IS_PRIVATE(inode)))
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return 0;
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smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_PATH);
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smk_ad_setfield_u_fs_path(&ad, file->f_path);
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rc = smk_curacc(smk_of_inode(inode), MAY_LOCK, &ad);
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@ -1681,6 +1708,9 @@ static int smack_file_fcntl(struct file *file, unsigned int cmd,
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int rc = 0;
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struct inode *inode = file_inode(file);
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if (unlikely(IS_PRIVATE(inode)))
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return 0;
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switch (cmd) {
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case F_GETLK:
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break;
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@ -1734,6 +1764,9 @@ static int smack_mmap_file(struct file *file,
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if (file == NULL)
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return 0;
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if (unlikely(IS_PRIVATE(file_inode(file))))
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return 0;
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isp = file_inode(file)->i_security;
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if (isp->smk_mmap == NULL)
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return 0;
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@ -1934,12 +1967,9 @@ static int smack_file_open(struct file *file, const struct cred *cred)
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struct smk_audit_info ad;
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int rc;
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if (smack_privileged(CAP_MAC_OVERRIDE))
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return 0;
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smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_PATH);
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smk_ad_setfield_u_fs_path(&ad, file->f_path);
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rc = smk_access(tsp->smk_task, smk_of_inode(inode), MAY_READ, &ad);
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rc = smk_tskacc(tsp, smk_of_inode(inode), MAY_READ, &ad);
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rc = smk_bu_credfile(cred, file, MAY_READ, rc);
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return rc;
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@ -2353,6 +2383,20 @@ static int smack_sk_alloc_security(struct sock *sk, int family, gfp_t gfp_flags)
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*/
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static void smack_sk_free_security(struct sock *sk)
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{
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#ifdef SMACK_IPV6_PORT_LABELING
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struct smk_port_label *spp;
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if (sk->sk_family == PF_INET6) {
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rcu_read_lock();
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list_for_each_entry_rcu(spp, &smk_ipv6_port_list, list) {
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if (spp->smk_sock != sk)
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continue;
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spp->smk_can_reuse = 1;
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break;
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}
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rcu_read_unlock();
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}
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#endif
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kfree(sk->sk_security);
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}
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@ -2603,17 +2647,20 @@ static void smk_ipv6_port_label(struct socket *sock, struct sockaddr *address)
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* on the bound socket. Take the changes to the port
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* as well.
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*/
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list_for_each_entry(spp, &smk_ipv6_port_list, list) {
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rcu_read_lock();
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list_for_each_entry_rcu(spp, &smk_ipv6_port_list, list) {
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if (sk != spp->smk_sock)
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continue;
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spp->smk_in = ssp->smk_in;
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spp->smk_out = ssp->smk_out;
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rcu_read_unlock();
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return;
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}
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/*
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* A NULL address is only used for updating existing
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* bound entries. If there isn't one, it's OK.
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*/
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rcu_read_unlock();
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return;
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}
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@ -2629,16 +2676,23 @@ static void smk_ipv6_port_label(struct socket *sock, struct sockaddr *address)
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* Look for an existing port list entry.
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* This is an indication that a port is getting reused.
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*/
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list_for_each_entry(spp, &smk_ipv6_port_list, list) {
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if (spp->smk_port != port)
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rcu_read_lock();
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list_for_each_entry_rcu(spp, &smk_ipv6_port_list, list) {
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if (spp->smk_port != port || spp->smk_sock_type != sock->type)
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continue;
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if (spp->smk_can_reuse != 1) {
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rcu_read_unlock();
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return;
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}
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spp->smk_port = port;
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spp->smk_sock = sk;
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spp->smk_in = ssp->smk_in;
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spp->smk_out = ssp->smk_out;
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spp->smk_can_reuse = 0;
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rcu_read_unlock();
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return;
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}
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rcu_read_unlock();
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/*
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* A new port entry is required.
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*/
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@ -2650,8 +2704,12 @@ static void smk_ipv6_port_label(struct socket *sock, struct sockaddr *address)
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spp->smk_sock = sk;
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spp->smk_in = ssp->smk_in;
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spp->smk_out = ssp->smk_out;
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spp->smk_sock_type = sock->type;
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spp->smk_can_reuse = 0;
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list_add(&spp->list, &smk_ipv6_port_list);
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mutex_lock(&smack_ipv6_lock);
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list_add_rcu(&spp->list, &smk_ipv6_port_list);
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mutex_unlock(&smack_ipv6_lock);
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return;
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}
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@ -2702,14 +2760,16 @@ static int smk_ipv6_port_check(struct sock *sk, struct sockaddr_in6 *address,
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return 0;
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port = ntohs(address->sin6_port);
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list_for_each_entry(spp, &smk_ipv6_port_list, list) {
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if (spp->smk_port != port)
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rcu_read_lock();
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list_for_each_entry_rcu(spp, &smk_ipv6_port_list, list) {
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if (spp->smk_port != port || spp->smk_sock_type != sk->sk_type)
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continue;
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object = spp->smk_in;
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if (act == SMK_CONNECTING)
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ssp->smk_packet = spp->smk_out;
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break;
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}
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rcu_read_unlock();
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return smk_ipv6_check(skp, object, address, act);
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}
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@ -3438,6 +3498,13 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
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case PIPEFS_MAGIC:
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isp->smk_inode = smk_of_current();
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break;
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case SOCKFS_MAGIC:
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/*
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* Socket access is controlled by the socket
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* structures associated with the task involved.
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*/
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isp->smk_inode = &smack_known_star;
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break;
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default:
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isp->smk_inode = sbsp->smk_root;
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break;
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@ -3454,19 +3521,12 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
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*/
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switch (sbp->s_magic) {
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case SMACK_MAGIC:
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case PIPEFS_MAGIC:
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case SOCKFS_MAGIC:
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case CGROUP_SUPER_MAGIC:
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/*
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* Casey says that it's a little embarrassing
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* that the smack file system doesn't do
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* extended attributes.
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*
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* Casey says pipes are easy (?)
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*
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* Socket access is controlled by the socket
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* structures associated with the task involved.
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*
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* Cgroupfs is special
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*/
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final = &smack_known_star;
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@ -3849,7 +3909,7 @@ static struct smack_known *smack_from_secattr(struct netlbl_lsm_secattr *sap,
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* ambient value.
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*/
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rcu_read_lock();
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list_for_each_entry(skp, &smack_known_list, list) {
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list_for_each_entry_rcu(skp, &smack_known_list, list) {
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if (sap->attr.mls.lvl != skp->smk_netlabel.attr.mls.lvl)
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continue;
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/*
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@ -67,6 +67,7 @@ enum smk_inos {
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/*
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* List locks
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*/
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static DEFINE_MUTEX(smack_master_list_lock);
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static DEFINE_MUTEX(smack_cipso_lock);
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static DEFINE_MUTEX(smack_ambient_lock);
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static DEFINE_MUTEX(smk_net4addr_lock);
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@ -262,12 +263,16 @@ static int smk_set_access(struct smack_parsed_rule *srp,
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* it needs to get added for reporting.
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*/
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if (global) {
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mutex_unlock(rule_lock);
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smlp = kzalloc(sizeof(*smlp), GFP_KERNEL);
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if (smlp != NULL) {
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smlp->smk_rule = sp;
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mutex_lock(&smack_master_list_lock);
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list_add_rcu(&smlp->list, &smack_rule_list);
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mutex_unlock(&smack_master_list_lock);
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} else
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rc = -ENOMEM;
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return rc;
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}
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}
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