#define SMK_LABELLEN 24
#define SMK_LONGLABEL 256
+/*
+ * This is the repository for labels seen so that it is
+ * not necessary to keep allocating tiny chuncks of memory
+ * and so that they can be shared.
+ *
+ * Labels are never modified in place. Anytime a label
+ * is imported (e.g. xattrset on a file) the list is checked
+ * for it and it is added if it doesn't exist. The address
+ * is passed out in either case. Entries are added, but
+ * never deleted.
+ *
+ * Since labels are hanging around anyway it doesn't
+ * hurt to maintain a secid for those awkward situations
+ * where kernel components that ought to use LSM independent
+ * interfaces don't. The secid should go away when all of
+ * these components have been repaired.
+ *
+ * The cipso value associated with the label gets stored here, too.
+ *
+ * Keep the access rules for this subject label here so that
+ * the entire set of rules does not need to be examined every
+ * time.
+ */
+struct smack_known {
+ struct list_head list;
+ char *smk_known;
+ u32 smk_secid;
+ struct netlbl_lsm_secattr smk_netlabel; /* on wire labels */
+ struct list_head smk_rules; /* access rules */
+ struct mutex smk_rules_lock; /* lock for rules */
+};
+
/*
* Maximum number of bytes for the levels in a CIPSO IP option.
* Why 23? CIPSO is constrained to 30, so a 32 byte buffer is
};
struct socket_smack {
- char *smk_out; /* outbound label */
- char *smk_in; /* inbound label */
- char *smk_packet; /* TCP peer label */
+ struct smack_known *smk_out; /* outbound label */
+ char *smk_in; /* inbound label */
+ char *smk_packet; /* TCP peer label */
};
/*
* Inode smack data
*/
struct inode_smack {
- char *smk_inode; /* label of the fso */
- char *smk_task; /* label of the task */
- char *smk_mmap; /* label of the mmap domain */
- struct mutex smk_lock; /* initialization lock */
- int smk_flags; /* smack inode flags */
+ char *smk_inode; /* label of the fso */
+ struct smack_known *smk_task; /* label of the task */
+ struct smack_known *smk_mmap; /* label of the mmap domain */
+ struct mutex smk_lock; /* initialization lock */
+ int smk_flags; /* smack inode flags */
};
struct task_smack {
- char *smk_task; /* label for access control */
- char *smk_forked; /* label when forked */
+ struct smack_known *smk_task; /* label for access control */
+ struct smack_known *smk_forked; /* label when forked */
struct list_head smk_rules; /* per task access rules */
struct mutex smk_rules_lock; /* lock for the rules */
};
*/
struct smack_rule {
struct list_head list;
- char *smk_subject;
+ struct smack_known *smk_subject;
char *smk_object;
int smk_access;
};
struct sock *smk_sock; /* socket initialized on */
unsigned short smk_port; /* the port number */
char *smk_in; /* incoming label */
- char *smk_out; /* outgoing label */
-};
-
-/*
- * This is the repository for labels seen so that it is
- * not necessary to keep allocating tiny chuncks of memory
- * and so that they can be shared.
- *
- * Labels are never modified in place. Anytime a label
- * is imported (e.g. xattrset on a file) the list is checked
- * for it and it is added if it doesn't exist. The address
- * is passed out in either case. Entries are added, but
- * never deleted.
- *
- * Since labels are hanging around anyway it doesn't
- * hurt to maintain a secid for those awkward situations
- * where kernel components that ought to use LSM independent
- * interfaces don't. The secid should go away when all of
- * these components have been repaired.
- *
- * The cipso value associated with the label gets stored here, too.
- *
- * Keep the access rules for this subject label here so that
- * the entire set of rules does not need to be examined every
- * time.
- */
-struct smack_known {
- struct list_head list;
- char *smk_known;
- u32 smk_secid;
- struct netlbl_lsm_secattr smk_netlabel; /* on wire labels */
- struct list_head smk_rules; /* access rules */
- struct mutex smk_rules_lock; /* lock for rules */
+ struct smack_known *smk_out; /* outgoing label */
};
/*
* These functions are in smack_access.c
*/
int smk_access_entry(char *, char *, struct list_head *);
-int smk_access(char *, char *, int, struct smk_audit_info *);
+int smk_access(struct smack_known *, char *, int, struct smk_audit_info *);
int smk_curacc(char *, u32, struct smk_audit_info *);
-char *smack_from_secid(const u32);
+struct smack_known *smack_from_secid(const u32);
char *smk_parse_smack(const char *string, int len);
int smk_netlbl_mls(int, char *, struct netlbl_lsm_secattr *, int);
char *smk_import(const char *, int);
*/
extern int smack_cipso_direct;
extern int smack_cipso_mapped;
-extern char *smack_net_ambient;
+extern struct smack_known *smack_net_ambient;
extern char *smack_onlycap;
extern const char *smack_cipso_option;
}
/*
- * Present a pointer to the smack label in an task blob.
+ * Present a pointer to the smack label entry in an task blob.
*/
-static inline char *smk_of_task(const struct task_smack *tsp)
+static inline struct smack_known *smk_of_task(const struct task_smack *tsp)
{
return tsp->smk_task;
}
/*
- * Present a pointer to the forked smack label in an task blob.
+ * Present a pointer to the forked smack label entry in an task blob.
*/
-static inline char *smk_of_forked(const struct task_smack *tsp)
+static inline struct smack_known *smk_of_forked(const struct task_smack *tsp)
{
return tsp->smk_forked;
}
/*
* Present a pointer to the smack label in the current task blob.
*/
-static inline char *smk_of_current(void)
+static inline struct smack_known *smk_of_current(void)
{
return smk_of_task(current_security());
}
*/
static inline int smack_privileged(int cap)
{
+ struct smack_known *skp = smk_of_current();
+
if (!capable(cap))
return 0;
- if (smack_onlycap == NULL || smack_onlycap == smk_of_current())
+ if (smack_onlycap == NULL || smack_onlycap == skp->smk_known)
return 1;
return 0;
}
* Returns a pointer to the master list entry for the Smack label
* or NULL if there was no label to fetch.
*/
-static char *smk_fetch(const char *name, struct inode *ip, struct dentry *dp)
+static struct smack_known *smk_fetch(const char *name, struct inode *ip,
+ struct dentry *dp)
{
int rc;
char *buffer;
- char *result = NULL;
+ struct smack_known *skp = NULL;
if (ip->i_op->getxattr == NULL)
return NULL;
rc = ip->i_op->getxattr(dp, name, buffer, SMK_LONGLABEL);
if (rc > 0)
- result = smk_import(buffer, rc);
+ skp = smk_import_entry(buffer, rc);
kfree(buffer);
- return result;
+ return skp;
}
/**
*
* Returns the new blob or NULL if there's no memory available
*/
-static struct task_smack *new_task_smack(char *task, char *forked, gfp_t gfp)
+static struct task_smack *new_task_smack(struct smack_known *task,
+ struct smack_known *forked, gfp_t gfp)
{
struct task_smack *tsp;
{
int rc;
struct smk_audit_info ad;
- char *tsp;
+ struct smack_known *skp;
rc = cap_ptrace_access_check(ctp, mode);
if (rc != 0)
return rc;
- tsp = smk_of_task(task_security(ctp));
+ skp = smk_of_task(task_security(ctp));
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK);
smk_ad_setfield_u_tsk(&ad, ctp);
- rc = smk_curacc(tsp, MAY_READWRITE, &ad);
+ rc = smk_curacc(skp->smk_known, MAY_READWRITE, &ad);
return rc;
}
{
int rc;
struct smk_audit_info ad;
- char *tsp;
+ struct smack_known *skp;
rc = cap_ptrace_traceme(ptp);
if (rc != 0)
return rc;
- tsp = smk_of_task(task_security(ptp));
+ skp = smk_of_task(task_security(ptp));
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK);
smk_ad_setfield_u_tsk(&ad, ptp);
- rc = smk_curacc(tsp, MAY_READWRITE, &ad);
+ rc = smk_curacc(skp->smk_known, MAY_READWRITE, &ad);
return rc;
}
static int smack_syslog(int typefrom_file)
{
int rc = 0;
- char *sp = smk_of_current();
+ struct smack_known *skp = smk_of_current();
if (smack_privileged(CAP_MAC_OVERRIDE))
return 0;
- if (sp != smack_known_floor.smk_known)
+ if (skp != &smack_known_floor)
rc = -EACCES;
return rc;
*/
static int smack_inode_alloc_security(struct inode *inode)
{
- inode->i_security = new_inode_smack(smk_of_current());
+ struct smack_known *skp = smk_of_current();
+
+ inode->i_security = new_inode_smack(skp->smk_known);
if (inode->i_security == NULL)
return -ENOMEM;
return 0;
const struct qstr *qstr, char **name,
void **value, size_t *len)
{
- struct smack_known *skp;
struct inode_smack *issp = inode->i_security;
- char *csp = smk_of_current();
+ struct smack_known *skp = smk_of_current();
char *isp = smk_of_inode(inode);
char *dsp = smk_of_inode(dir);
int may;
}
if (value) {
- skp = smk_find_entry(csp);
rcu_read_lock();
- may = smk_access_entry(csp, dsp, &skp->smk_rules);
+ may = smk_access_entry(skp->smk_known, dsp, &skp->smk_rules);
rcu_read_unlock();
/*
static void smack_inode_post_setxattr(struct dentry *dentry, const char *name,
const void *value, size_t size, int flags)
{
- char *nsp;
+ struct smack_known *skp;
struct inode_smack *isp = dentry->d_inode->i_security;
+ if (strcmp(name, XATTR_NAME_SMACKTRANSMUTE) == 0) {
+ isp->smk_flags |= SMK_INODE_TRANSMUTE;
+ return;
+ }
+
+ skp = smk_import_entry(value, size);
if (strcmp(name, XATTR_NAME_SMACK) == 0) {
- nsp = smk_import(value, size);
- if (nsp != NULL)
- isp->smk_inode = nsp;
+ if (skp != NULL)
+ isp->smk_inode = skp->smk_known;
else
isp->smk_inode = smack_known_invalid.smk_known;
} else if (strcmp(name, XATTR_NAME_SMACKEXEC) == 0) {
- nsp = smk_import(value, size);
- if (nsp != NULL)
- isp->smk_task = nsp;
+ if (skp != NULL)
+ isp->smk_task = skp;
else
- isp->smk_task = smack_known_invalid.smk_known;
+ isp->smk_task = &smack_known_invalid;
} else if (strcmp(name, XATTR_NAME_SMACKMMAP) == 0) {
- nsp = smk_import(value, size);
- if (nsp != NULL)
- isp->smk_mmap = nsp;
+ if (skp != NULL)
+ isp->smk_mmap = skp;
else
- isp->smk_mmap = smack_known_invalid.smk_known;
- } else if (strcmp(name, XATTR_NAME_SMACKTRANSMUTE) == 0)
- isp->smk_flags |= SMK_INODE_TRANSMUTE;
+ isp->smk_mmap = &smack_known_invalid;
+ }
return;
}
if (strcmp(name, XATTR_SMACK_IPIN) == 0)
isp = ssp->smk_in;
else if (strcmp(name, XATTR_SMACK_IPOUT) == 0)
- isp = ssp->smk_out;
+ isp = ssp->smk_out->smk_known;
else
return -EOPNOTSUPP;
*/
static int smack_file_alloc_security(struct file *file)
{
- file->f_security = smk_of_current();
+ struct smack_known *skp = smk_of_current();
+
+ file->f_security = skp->smk_known;
return 0;
}
unsigned long flags)
{
struct smack_known *skp;
+ struct smack_known *mkp;
struct smack_rule *srp;
struct task_smack *tsp;
- char *sp;
- char *msmack;
char *osmack;
struct inode_smack *isp;
int may;
isp = file_inode(file)->i_security;
if (isp->smk_mmap == NULL)
return 0;
- msmack = isp->smk_mmap;
+ mkp = isp->smk_mmap;
tsp = current_security();
- sp = smk_of_current();
- skp = smk_find_entry(sp);
+ skp = smk_of_current();
rc = 0;
rcu_read_lock();
/*
* Matching labels always allows access.
*/
- if (msmack == osmack)
+ if (mkp->smk_known == osmack)
continue;
/*
* If there is a matching local rule take
* that into account as well.
*/
- may = smk_access_entry(srp->smk_subject, osmack,
+ may = smk_access_entry(srp->smk_subject->smk_known, osmack,
&tsp->smk_rules);
if (may == -ENOENT)
may = srp->smk_access;
* If there isn't one a SMACK64MMAP subject
* can't have as much access as current.
*/
- skp = smk_find_entry(msmack);
- mmay = smk_access_entry(msmack, osmack, &skp->smk_rules);
+ mmay = smk_access_entry(mkp->smk_known, osmack,
+ &mkp->smk_rules);
if (mmay == -ENOENT) {
rc = -EACCES;
break;
* If there is a local entry it modifies the
* potential access, too.
*/
- tmay = smk_access_entry(msmack, osmack, &tsp->smk_rules);
+ tmay = smk_access_entry(mkp->smk_known, osmack,
+ &tsp->smk_rules);
if (tmay != -ENOENT)
mmay &= tmay;
*/
static int smack_file_set_fowner(struct file *file)
{
- file->f_security = smk_of_current();
+ struct smack_known *skp = smk_of_current();
+
+ file->f_security = skp->smk_known;
return 0;
}
static int smack_file_send_sigiotask(struct task_struct *tsk,
struct fown_struct *fown, int signum)
{
+ struct smack_known *skp;
+ struct smack_known *tkp = smk_of_task(tsk->cred->security);
struct file *file;
int rc;
- char *tsp = smk_of_task(tsk->cred->security);
struct smk_audit_info ad;
/*
file = container_of(fown, struct file, f_owner);
/* we don't log here as rc can be overriden */
- rc = smk_access(file->f_security, tsp, MAY_WRITE, NULL);
+ skp = smk_find_entry(file->f_security);
+ rc = smk_access(skp, tkp->smk_known, MAY_WRITE, NULL);
if (rc != 0 && has_capability(tsk, CAP_MAC_OVERRIDE))
rc = 0;
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK);
smk_ad_setfield_u_tsk(&ad, tsk);
- smack_log(file->f_security, tsp, MAY_WRITE, rc, &ad);
+ smack_log(file->f_security, tkp->smk_known, MAY_WRITE, rc, &ad);
return rc;
}
static int smack_kernel_act_as(struct cred *new, u32 secid)
{
struct task_smack *new_tsp = new->security;
- char *smack = smack_from_secid(secid);
+ struct smack_known *skp = smack_from_secid(secid);
- if (smack == NULL)
+ if (skp == NULL)
return -EINVAL;
- new_tsp->smk_task = smack;
+ new_tsp->smk_task = skp;
return 0;
}
struct inode_smack *isp = inode->i_security;
struct task_smack *tsp = new->security;
- tsp->smk_forked = isp->smk_inode;
- tsp->smk_task = isp->smk_inode;
+ tsp->smk_forked = smk_find_entry(isp->smk_inode);
+ tsp->smk_task = tsp->smk_forked;
return 0;
}
const char *caller)
{
struct smk_audit_info ad;
+ struct smack_known *skp = smk_of_task(task_security(p));
smk_ad_init(&ad, caller, LSM_AUDIT_DATA_TASK);
smk_ad_setfield_u_tsk(&ad, p);
- return smk_curacc(smk_of_task(task_security(p)), access, &ad);
+ return smk_curacc(skp->smk_known, access, &ad);
}
/**
*/
static void smack_task_getsecid(struct task_struct *p, u32 *secid)
{
- *secid = smack_to_secid(smk_of_task(task_security(p)));
+ struct smack_known *skp = smk_of_task(task_security(p));
+
+ *secid = skp->smk_secid;
}
/**
int sig, u32 secid)
{
struct smk_audit_info ad;
+ struct smack_known *skp;
+ struct smack_known *tkp = smk_of_task(task_security(p));
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK);
smk_ad_setfield_u_tsk(&ad, p);
* can write the receiver.
*/
if (secid == 0)
- return smk_curacc(smk_of_task(task_security(p)), MAY_WRITE,
- &ad);
+ return smk_curacc(tkp->smk_known, MAY_WRITE, &ad);
/*
* If the secid isn't 0 we're dealing with some USB IO
* specific behavior. This is not clean. For one thing
* we can't take privilege into account.
*/
- return smk_access(smack_from_secid(secid),
- smk_of_task(task_security(p)), MAY_WRITE, &ad);
+ skp = smack_from_secid(secid);
+ return smk_access(skp, tkp->smk_known, MAY_WRITE, &ad);
}
/**
static void smack_task_to_inode(struct task_struct *p, struct inode *inode)
{
struct inode_smack *isp = inode->i_security;
- isp->smk_inode = smk_of_task(task_security(p));
+ struct smack_known *skp = smk_of_task(task_security(p));
+
+ isp->smk_inode = skp->smk_known;
}
/*
*/
static int smack_sk_alloc_security(struct sock *sk, int family, gfp_t gfp_flags)
{
- char *csp = smk_of_current();
+ struct smack_known *skp = smk_of_current();
struct socket_smack *ssp;
ssp = kzalloc(sizeof(struct socket_smack), gfp_flags);
if (ssp == NULL)
return -ENOMEM;
- ssp->smk_in = csp;
- ssp->smk_out = csp;
+ ssp->smk_in = skp->smk_known;
+ ssp->smk_out = skp;
ssp->smk_packet = NULL;
sk->sk_security = ssp;
labeled == SMACK_UNLABELED_SOCKET)
netlbl_sock_delattr(sk);
else {
- skp = smk_find_entry(ssp->smk_out);
+ skp = ssp->smk_out;
rc = netlbl_sock_setattr(sk, sk->sk_family, &skp->smk_netlabel);
}
*/
static int smack_netlabel_send(struct sock *sk, struct sockaddr_in *sap)
{
+ struct smack_known *skp;
int rc;
int sk_lbl;
char *hostsp;
ad.a.u.net->v4info.daddr = sap->sin_addr.s_addr;
#endif
sk_lbl = SMACK_UNLABELED_SOCKET;
- rc = smk_access(ssp->smk_out, hostsp, MAY_WRITE, &ad);
+ skp = ssp->smk_out;
+ rc = smk_access(skp, hostsp, MAY_WRITE, &ad);
} else {
sk_lbl = SMACK_CIPSO_SOCKET;
rc = 0;
struct sockaddr_in6 *addr6;
struct smk_port_label *spp;
struct socket_smack *ssp = sk->sk_security;
+ struct smack_known *skp;
unsigned short port = 0;
- char *subject;
char *object;
struct smk_audit_info ad;
#ifdef CONFIG_AUDIT
#endif
if (act == SMK_RECEIVING) {
- subject = smack_net_ambient;
+ skp = smack_net_ambient;
object = ssp->smk_in;
} else {
- subject = ssp->smk_out;
- object = smack_net_ambient;
+ skp = ssp->smk_out;
+ object = smack_net_ambient->smk_known;
}
/*
* It's local so the send check has to have passed.
*/
if (act == SMK_RECEIVING) {
- subject = smack_known_web.smk_known;
+ skp = &smack_known_web;
goto auditout;
}
continue;
object = spp->smk_in;
if (act == SMK_CONNECTING)
- ssp->smk_packet = spp->smk_out;
+ ssp->smk_packet = spp->smk_out->smk_known;
break;
}
else
ad.a.u.net->v6info.daddr = addr6->sin6_addr;
#endif
- return smk_access(subject, object, MAY_WRITE, &ad);
+ return smk_access(skp, object, MAY_WRITE, &ad);
}
/**
static int smack_inode_setsecurity(struct inode *inode, const char *name,
const void *value, size_t size, int flags)
{
- char *sp;
+ struct smack_known *skp;
struct inode_smack *nsp = inode->i_security;
struct socket_smack *ssp;
struct socket *sock;
if (value == NULL || size > SMK_LONGLABEL || size == 0)
return -EACCES;
- sp = smk_import(value, size);
- if (sp == NULL)
+ skp = smk_import_entry(value, size);
+ if (skp == NULL)
return -EINVAL;
if (strcmp(name, XATTR_SMACK_SUFFIX) == 0) {
- nsp->smk_inode = sp;
+ nsp->smk_inode = skp->smk_known;
nsp->smk_flags |= SMK_INODE_INSTANT;
return 0;
}
ssp = sock->sk->sk_security;
if (strcmp(name, XATTR_SMACK_IPIN) == 0)
- ssp->smk_in = sp;
+ ssp->smk_in = skp->smk_known;
else if (strcmp(name, XATTR_SMACK_IPOUT) == 0) {
- ssp->smk_out = sp;
+ ssp->smk_out = skp;
if (sock->sk->sk_family == PF_INET) {
rc = smack_netlabel(sock->sk, SMACK_CIPSO_SOCKET);
if (rc != 0)
*/
static int smack_msg_msg_alloc_security(struct msg_msg *msg)
{
- msg->security = smk_of_current();
+ struct smack_known *skp = smk_of_current();
+
+ msg->security = skp->smk_known;
return 0;
}
static int smack_shm_alloc_security(struct shmid_kernel *shp)
{
struct kern_ipc_perm *isp = &shp->shm_perm;
+ struct smack_known *skp = smk_of_current();
- isp->security = smk_of_current();
+ isp->security = skp->smk_known;
return 0;
}
static int smack_sem_alloc_security(struct sem_array *sma)
{
struct kern_ipc_perm *isp = &sma->sem_perm;
+ struct smack_known *skp = smk_of_current();
- isp->security = smk_of_current();
+ isp->security = skp->smk_known;
return 0;
}
static int smack_msg_queue_alloc_security(struct msg_queue *msq)
{
struct kern_ipc_perm *kisp = &msq->q_perm;
+ struct smack_known *skp = smk_of_current();
- kisp->security = smk_of_current();
+ kisp->security = skp->smk_known;
return 0;
}
struct super_block *sbp;
struct superblock_smack *sbsp;
struct inode_smack *isp;
- char *csp = smk_of_current();
- char *fetched;
+ struct smack_known *skp;
+ struct smack_known *ckp = smk_of_current();
char *final;
char trattr[TRANS_TRUE_SIZE];
int transflag = 0;
* Programs that change smack have to treat the
* pty with respect.
*/
- final = csp;
+ final = ckp->smk_known;
break;
case SOCKFS_MAGIC:
/*
* Get the dentry for xattr.
*/
dp = dget(opt_dentry);
- fetched = smk_fetch(XATTR_NAME_SMACK, inode, dp);
- if (fetched != NULL)
- final = fetched;
+ skp = smk_fetch(XATTR_NAME_SMACK, inode, dp);
+ if (skp != NULL)
+ final = skp->smk_known;
/*
* Transmuting directory
}
if (final == NULL)
- isp->smk_inode = csp;
+ isp->smk_inode = ckp->smk_known;
else
isp->smk_inode = final;
*/
static int smack_getprocattr(struct task_struct *p, char *name, char **value)
{
+ struct smack_known *skp = smk_of_task(task_security(p));
char *cp;
int slen;
if (strcmp(name, "current") != 0)
return -EINVAL;
- cp = kstrdup(smk_of_task(task_security(p)), GFP_KERNEL);
+ cp = kstrdup(skp->smk_known, GFP_KERNEL);
if (cp == NULL)
return -ENOMEM;
{
struct task_smack *tsp;
struct cred *new;
- char *newsmack;
+ struct smack_known *skp;
/*
* Changing another process' Smack value is too dangerous
if (strcmp(name, "current") != 0)
return -EINVAL;
- newsmack = smk_import(value, size);
- if (newsmack == NULL)
+ skp = smk_import_entry(value, size);
+ if (skp == NULL)
return -EINVAL;
/*
* No process is ever allowed the web ("@") label.
*/
- if (newsmack == smack_known_web.smk_known)
+ if (skp == &smack_known_web)
return -EPERM;
new = prepare_creds();
return -ENOMEM;
tsp = new->security;
- tsp->smk_task = newsmack;
+ tsp->smk_task = skp;
commit_creds(new);
return size;
static int smack_unix_stream_connect(struct sock *sock,
struct sock *other, struct sock *newsk)
{
+ struct smack_known *skp;
struct socket_smack *ssp = sock->sk_security;
struct socket_smack *osp = other->sk_security;
struct socket_smack *nsp = newsk->sk_security;
smk_ad_setfield_u_net_sk(&ad, other);
#endif
- if (!smack_privileged(CAP_MAC_OVERRIDE))
- rc = smk_access(ssp->smk_out, osp->smk_in, MAY_WRITE, &ad);
+ if (!smack_privileged(CAP_MAC_OVERRIDE)) {
+ skp = ssp->smk_out;
+ rc = smk_access(skp, osp->smk_in, MAY_WRITE, &ad);
+ }
/*
* Cross reference the peer labels for SO_PEERSEC.
*/
if (rc == 0) {
- nsp->smk_packet = ssp->smk_out;
- ssp->smk_packet = osp->smk_out;
+ nsp->smk_packet = ssp->smk_out->smk_known;
+ ssp->smk_packet = osp->smk_out->smk_known;
}
return rc;
{
struct socket_smack *ssp = sock->sk->sk_security;
struct socket_smack *osp = other->sk->sk_security;
+ struct smack_known *skp;
struct smk_audit_info ad;
- int rc = 0;
#ifdef CONFIG_AUDIT
struct lsm_network_audit net;
smk_ad_setfield_u_net_sk(&ad, other->sk);
#endif
- if (!smack_privileged(CAP_MAC_OVERRIDE))
- rc = smk_access(ssp->smk_out, osp->smk_in, MAY_WRITE, &ad);
+ if (smack_privileged(CAP_MAC_OVERRIDE))
+ return 0;
- return rc;
+ skp = ssp->smk_out;
+ return smk_access(skp, osp->smk_in, MAY_WRITE, &ad);
}
/**
* @sap: netlabel secattr
* @ssp: socket security information
*
- * Returns a pointer to a Smack label found on the label list.
+ * Returns a pointer to a Smack label entry found on the label list.
*/
-static char *smack_from_secattr(struct netlbl_lsm_secattr *sap,
- struct socket_smack *ssp)
+static struct smack_known *smack_from_secattr(struct netlbl_lsm_secattr *sap,
+ struct socket_smack *ssp)
{
- struct smack_known *kp;
- char *sp;
+ struct smack_known *skp;
int found = 0;
if ((sap->flags & NETLBL_SECATTR_MLS_LVL) != 0) {
* ambient value.
*/
rcu_read_lock();
- list_for_each_entry(kp, &smack_known_list, list) {
- if (sap->attr.mls.lvl != kp->smk_netlabel.attr.mls.lvl)
+ list_for_each_entry(skp, &smack_known_list, list) {
+ if (sap->attr.mls.lvl != skp->smk_netlabel.attr.mls.lvl)
continue;
if (memcmp(sap->attr.mls.cat,
- kp->smk_netlabel.attr.mls.cat,
+ skp->smk_netlabel.attr.mls.cat,
SMK_CIPSOLEN) != 0)
continue;
found = 1;
rcu_read_unlock();
if (found)
- return kp->smk_known;
+ return skp;
if (ssp != NULL && ssp->smk_in == smack_known_star.smk_known)
- return smack_known_web.smk_known;
- return smack_known_star.smk_known;
+ return &smack_known_web;
+ return &smack_known_star;
}
if ((sap->flags & NETLBL_SECATTR_SECID) != 0) {
/*
* Looks like a fallback, which gives us a secid.
*/
- sp = smack_from_secid(sap->attr.secid);
+ skp = smack_from_secid(sap->attr.secid);
/*
* This has got to be a bug because it is
* impossible to specify a fallback without
* it has a secid, and the only way to get a
* secid is from a fallback.
*/
- BUG_ON(sp == NULL);
- return sp;
+ BUG_ON(skp == NULL);
+ return skp;
}
/*
* Without guidance regarding the smack value
{
struct netlbl_lsm_secattr secattr;
struct socket_smack *ssp = sk->sk_security;
+ struct smack_known *skp;
struct sockaddr sadd;
- char *csp;
int rc = 0;
struct smk_audit_info ad;
#ifdef CONFIG_AUDIT
rc = netlbl_skbuff_getattr(skb, sk->sk_family, &secattr);
if (rc == 0)
- csp = smack_from_secattr(&secattr, ssp);
+ skp = smack_from_secattr(&secattr, ssp);
else
- csp = smack_net_ambient;
+ skp = smack_net_ambient;
netlbl_secattr_destroy(&secattr);
* This is the simplist possible security model
* for networking.
*/
- rc = smk_access(csp, ssp->smk_in, MAY_WRITE, &ad);
+ rc = smk_access(skp, ssp->smk_in, MAY_WRITE, &ad);
if (rc != 0)
netlbl_skbuff_err(skb, rc, 0);
break;
{
struct netlbl_lsm_secattr secattr;
struct socket_smack *ssp = NULL;
- char *sp;
+ struct smack_known *skp;
int family = PF_UNSPEC;
u32 s = 0; /* 0 is the invalid secid */
int rc;
if (family == PF_UNIX) {
ssp = sock->sk->sk_security;
- s = smack_to_secid(ssp->smk_out);
+ s = ssp->smk_out->smk_secid;
} else if (family == PF_INET || family == PF_INET6) {
/*
* Translate what netlabel gave us.
netlbl_secattr_init(&secattr);
rc = netlbl_skbuff_getattr(skb, family, &secattr);
if (rc == 0) {
- sp = smack_from_secattr(&secattr, ssp);
- s = smack_to_secid(sp);
+ skp = smack_from_secattr(&secattr, ssp);
+ s = skp->smk_secid;
}
netlbl_secattr_destroy(&secattr);
}
static void smack_sock_graft(struct sock *sk, struct socket *parent)
{
struct socket_smack *ssp;
+ struct smack_known *skp = smk_of_current();
if (sk == NULL ||
(sk->sk_family != PF_INET && sk->sk_family != PF_INET6))
return;
ssp = sk->sk_security;
- ssp->smk_in = ssp->smk_out = smk_of_current();
+ ssp->smk_in = skp->smk_known;
+ ssp->smk_out = skp;
/* cssp->smk_packet is already set in smack_inet_csk_clone() */
}
struct netlbl_lsm_secattr secattr;
struct sockaddr_in addr;
struct iphdr *hdr;
- char *sp;
char *hsp;
int rc;
struct smk_audit_info ad;
netlbl_secattr_init(&secattr);
rc = netlbl_skbuff_getattr(skb, family, &secattr);
if (rc == 0)
- sp = smack_from_secattr(&secattr, ssp);
+ skp = smack_from_secattr(&secattr, ssp);
else
- sp = smack_known_huh.smk_known;
+ skp = &smack_known_huh;
netlbl_secattr_destroy(&secattr);
#ifdef CONFIG_AUDIT
* Receiving a packet requires that the other end be able to write
* here. Read access is not required.
*/
- rc = smk_access(sp, ssp->smk_in, MAY_WRITE, &ad);
+ rc = smk_access(skp, ssp->smk_in, MAY_WRITE, &ad);
if (rc != 0)
return rc;
* Save the peer's label in the request_sock so we can later setup
* smk_packet in the child socket so that SO_PEERCRED can report it.
*/
- req->peer_secid = smack_to_secid(sp);
+ req->peer_secid = skp->smk_secid;
/*
* We need to decide if we want to label the incoming connection here
hsp = smack_host_label(&addr);
rcu_read_unlock();
- if (hsp == NULL) {
- skp = smk_find_entry(sp);
+ if (hsp == NULL)
rc = netlbl_req_setattr(req, &skp->smk_netlabel);
- } else
+ else
netlbl_req_delattr(req);
return rc;
const struct request_sock *req)
{
struct socket_smack *ssp = sk->sk_security;
+ struct smack_known *skp;
- if (req->peer_secid != 0)
- ssp->smk_packet = smack_from_secid(req->peer_secid);
- else
+ if (req->peer_secid != 0) {
+ skp = smack_from_secid(req->peer_secid);
+ ssp->smk_packet = skp->smk_known;
+ } else
ssp->smk_packet = NULL;
}
static int smack_key_alloc(struct key *key, const struct cred *cred,
unsigned long flags)
{
- key->security = smk_of_task(cred->security);
+ struct smack_known *skp = smk_of_task(cred->security);
+
+ key->security = skp->smk_known;
return 0;
}
{
struct key *keyp;
struct smk_audit_info ad;
- char *tsp = smk_of_task(cred->security);
+ struct smack_known *tkp = smk_of_task(cred->security);
keyp = key_ref_to_ptr(key_ref);
if (keyp == NULL)
/*
* This should not occur
*/
- if (tsp == NULL)
+ if (tkp == NULL)
return -EACCES;
#ifdef CONFIG_AUDIT
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_KEY);
ad.a.u.key_struct.key = keyp->serial;
ad.a.u.key_struct.key_desc = keyp->description;
#endif
- return smk_access(tsp, keyp->security,
- MAY_READWRITE, &ad);
+ return smk_access(tkp, keyp->security, MAY_READWRITE, &ad);
}
#endif /* CONFIG_KEYS */
static int smack_audit_rule_match(u32 secid, u32 field, u32 op, void *vrule,
struct audit_context *actx)
{
- char *smack;
+ struct smack_known *skp;
char *rule = vrule;
if (!rule) {
if (field != AUDIT_SUBJ_USER && field != AUDIT_OBJ_USER)
return 0;
- smack = smack_from_secid(secid);
+ skp = smack_from_secid(secid);
/*
* No need to do string comparisons. If a match occurs,
* label.
*/
if (op == Audit_equal)
- return (rule == smack);
+ return (rule == skp->smk_known);
if (op == Audit_not_equal)
- return (rule != smack);
+ return (rule != skp->smk_known);
return 0;
}
*/
static int smack_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
{
- char *sp = smack_from_secid(secid);
+ struct smack_known *skp = smack_from_secid(secid);
if (secdata)
- *secdata = sp;
- *seclen = strlen(sp);
+ *secdata = skp->smk_known;
+ *seclen = strlen(skp->smk_known);
return 0;
}
if (!security_module_enable(&smack_ops))
return 0;
- tsp = new_task_smack(smack_known_floor.smk_known,
- smack_known_floor.smk_known, GFP_KERNEL);
+ tsp = new_task_smack(&smack_known_floor, &smack_known_floor,
+ GFP_KERNEL);
if (tsp == NULL)
return -ENOMEM;
projects / deliverable / linux.git / commitdiff
