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Diffstat (limited to 'security/smack/smack_lsm.c')
-rw-r--r--security/smack/smack_lsm.c331
1 files changed, 180 insertions, 151 deletions
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 609e89de3c24..3669d9f9824e 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -62,11 +62,12 @@ LIST_HEAD(smk_ipv6_port_list);
* 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;
@@ -77,11 +78,11 @@ static char *smk_fetch(const char *name, struct inode *ip, struct dentry *dp)
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;
}
/**
@@ -111,7 +112,8 @@ struct inode_smack *new_inode_smack(char *smack)
*
* 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;
@@ -173,17 +175,17 @@ static int smack_ptrace_access_check(struct task_struct *ctp, unsigned int mode)
{
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;
}
@@ -199,17 +201,17 @@ static int smack_ptrace_traceme(struct task_struct *ptp)
{
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;
}
@@ -224,12 +226,12 @@ static int smack_ptrace_traceme(struct task_struct *ptp)
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;
@@ -533,7 +535,9 @@ static int smack_bprm_secureexec(struct linux_binprm *bprm)
*/
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;
@@ -566,9 +570,8 @@ static int smack_inode_init_security(struct inode *inode, struct inode *dir,
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;
@@ -580,9 +583,8 @@ static int smack_inode_init_security(struct inode *inode, struct inode *dir,
}
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();
/*
@@ -871,29 +873,31 @@ static int smack_inode_setxattr(struct dentry *dentry, const char *name,
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;
}
@@ -999,7 +1003,7 @@ static int smack_inode_getsecurity(const struct inode *inode,
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;
@@ -1079,7 +1083,9 @@ static int smack_file_permission(struct file *file, int mask)
*/
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;
}
@@ -1190,10 +1196,9 @@ static int smack_mmap_file(struct file *file,
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;
@@ -1207,11 +1212,10 @@ static int smack_mmap_file(struct file *file,
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();
@@ -1225,13 +1229,13 @@ static int smack_mmap_file(struct file *file,
/*
* 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;
@@ -1249,8 +1253,8 @@ static int smack_mmap_file(struct file *file,
* 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;
@@ -1259,7 +1263,8 @@ static int smack_mmap_file(struct file *file,
* 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;
@@ -1288,7 +1293,9 @@ static int smack_mmap_file(struct file *file,
*/
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;
}
@@ -1306,9 +1313,10 @@ static int smack_file_set_fowner(struct file *file)
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;
/*
@@ -1317,13 +1325,14 @@ static int smack_file_send_sigiotask(struct task_struct *tsk,
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;
}
@@ -1478,12 +1487,12 @@ static void smack_cred_transfer(struct cred *new, const struct cred *old)
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;
}
@@ -1501,8 +1510,8 @@ static int smack_kernel_create_files_as(struct cred *new,
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;
}
@@ -1518,10 +1527,11 @@ static int smk_curacc_on_task(struct task_struct *p, int access,
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);
}
/**
@@ -1567,7 +1577,9 @@ static int smack_task_getsid(struct task_struct *p)
*/
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;
}
/**
@@ -1671,6 +1683,8 @@ static int smack_task_kill(struct task_struct *p, struct siginfo *info,
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);
@@ -1679,15 +1693,14 @@ static int smack_task_kill(struct task_struct *p, struct siginfo *info,
* 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);
}
/**
@@ -1719,7 +1732,9 @@ static int smack_task_wait(struct task_struct *p)
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;
}
/*
@@ -1738,15 +1753,15 @@ static void smack_task_to_inode(struct task_struct *p, struct inode *inode)
*/
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;
@@ -1833,7 +1848,7 @@ static int smack_netlabel(struct sock *sk, int labeled)
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);
}
@@ -1856,6 +1871,7 @@ static int smack_netlabel(struct sock *sk, int labeled)
*/
static int smack_netlabel_send(struct sock *sk, struct sockaddr_in *sap)
{
+ struct smack_known *skp;
int rc;
int sk_lbl;
char *hostsp;
@@ -1874,7 +1890,8 @@ static int smack_netlabel_send(struct sock *sk, struct sockaddr_in *sap)
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;
@@ -1974,8 +1991,8 @@ static int smk_ipv6_port_check(struct sock *sk, struct sockaddr *address,
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
@@ -1983,11 +2000,11 @@ static int smk_ipv6_port_check(struct sock *sk, struct sockaddr *address,
#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;
}
/*
@@ -2008,7 +2025,7 @@ static int smk_ipv6_port_check(struct sock *sk, struct sockaddr *address,
* 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;
}
@@ -2017,7 +2034,7 @@ static int smk_ipv6_port_check(struct sock *sk, struct sockaddr *address,
continue;
object = spp->smk_in;
if (act == SMK_CONNECTING)
- ssp->smk_packet = spp->smk_out;
+ ssp->smk_packet = spp->smk_out->smk_known;
break;
}
@@ -2032,7 +2049,7 @@ auditout:
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);
}
/**
@@ -2050,7 +2067,7 @@ auditout:
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;
@@ -2059,12 +2076,12 @@ static int smack_inode_setsecurity(struct inode *inode, const char *name,
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;
}
@@ -2081,9 +2098,9 @@ static int smack_inode_setsecurity(struct inode *inode, const char *name,
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)
@@ -2203,7 +2220,9 @@ static int smack_flags_to_may(int flags)
*/
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;
}
@@ -2238,8 +2257,9 @@ static char *smack_of_shm(struct shmid_kernel *shp)
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;
}
@@ -2361,8 +2381,9 @@ static char *smack_of_sem(struct sem_array *sma)
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;
}
@@ -2479,8 +2500,9 @@ static int smack_sem_semop(struct sem_array *sma, struct sembuf *sops,
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;
}
@@ -2652,8 +2674,8 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
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;
@@ -2720,7 +2742,7 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
* Programs that change smack have to treat the
* pty with respect.
*/
- final = csp;
+ final = ckp->smk_known;
break;
case SOCKFS_MAGIC:
/*
@@ -2775,9 +2797,9 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
* 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
@@ -2817,7 +2839,7 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
}
if (final == NULL)
- isp->smk_inode = csp;
+ isp->smk_inode = ckp->smk_known;
else
isp->smk_inode = final;
@@ -2840,13 +2862,14 @@ unlockandout:
*/
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;
@@ -2872,7 +2895,7 @@ static int smack_setprocattr(struct task_struct *p, char *name,
{
struct task_smack *tsp;
struct cred *new;
- char *newsmack;
+ struct smack_known *skp;
/*
* Changing another process' Smack value is too dangerous
@@ -2890,14 +2913,14 @@ static int smack_setprocattr(struct task_struct *p, char *name,
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();
@@ -2905,7 +2928,7 @@ static int smack_setprocattr(struct task_struct *p, char *name,
return -ENOMEM;
tsp = new->security;
- tsp->smk_task = newsmack;
+ tsp->smk_task = skp;
commit_creds(new);
return size;
@@ -2923,6 +2946,7 @@ static int smack_setprocattr(struct task_struct *p, char *name,
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;
@@ -2936,15 +2960,17 @@ static int smack_unix_stream_connect(struct sock *sock,
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;
@@ -2962,8 +2988,8 @@ static int smack_unix_may_send(struct socket *sock, struct socket *other)
{
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;
@@ -2972,10 +2998,11 @@ static int smack_unix_may_send(struct socket *sock, struct socket *other)
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);
}
/**
@@ -3017,13 +3044,12 @@ static int smack_socket_sendmsg(struct socket *sock, struct msghdr *msg,
* @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) {
@@ -3038,11 +3064,11 @@ static char *smack_from_secattr(struct netlbl_lsm_secattr *sap,
* 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;
@@ -3051,17 +3077,17 @@ static char *smack_from_secattr(struct netlbl_lsm_secattr *sap,
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
@@ -3069,8 +3095,8 @@ static char *smack_from_secattr(struct netlbl_lsm_secattr *sap,
* 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
@@ -3139,8 +3165,8 @@ static int smack_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
{
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
@@ -3155,9 +3181,9 @@ static int smack_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
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);
@@ -3173,7 +3199,7 @@ static int smack_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
* 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;
@@ -3238,7 +3264,7 @@ static int smack_socket_getpeersec_dgram(struct socket *sock,
{
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;
@@ -3254,7 +3280,7 @@ static int smack_socket_getpeersec_dgram(struct socket *sock,
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.
@@ -3264,8 +3290,8 @@ static int smack_socket_getpeersec_dgram(struct socket *sock,
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);
}
@@ -3286,13 +3312,15 @@ static int smack_socket_getpeersec_dgram(struct socket *sock,
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() */
}
@@ -3314,7 +3342,6 @@ static int smack_inet_conn_request(struct sock *sk, struct sk_buff *skb,
struct netlbl_lsm_secattr secattr;
struct sockaddr_in addr;
struct iphdr *hdr;
- char *sp;
char *hsp;
int rc;
struct smk_audit_info ad;
@@ -3337,9 +3364,9 @@ static int smack_inet_conn_request(struct sock *sk, struct sk_buff *skb,
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
@@ -3352,7 +3379,7 @@ static int smack_inet_conn_request(struct sock *sk, struct sk_buff *skb,
* 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;
@@ -3360,7 +3387,7 @@ static int smack_inet_conn_request(struct sock *sk, struct sk_buff *skb,
* 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
@@ -3373,10 +3400,9 @@ static int smack_inet_conn_request(struct sock *sk, struct sk_buff *skb,
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;
@@ -3393,10 +3419,12 @@ static void smack_inet_csk_clone(struct sock *sk,
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;
}
@@ -3422,7 +3450,9 @@ static void smack_inet_csk_clone(struct sock *sk,
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;
}
@@ -3451,7 +3481,7 @@ static int smack_key_permission(key_ref_t key_ref,
{
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)
@@ -3465,15 +3495,14 @@ static int smack_key_permission(key_ref_t key_ref,
/*
* 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 */
@@ -3555,7 +3584,7 @@ static int smack_audit_rule_known(struct audit_krule *krule)
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) {
@@ -3567,7 +3596,7 @@ static int smack_audit_rule_match(u32 secid, u32 field, u32 op, void *vrule,
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,
@@ -3575,9 +3604,9 @@ static int smack_audit_rule_match(u32 secid, u32 field, u32 op, void *vrule,
* 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;
}
@@ -3605,11 +3634,11 @@ static void smack_audit_rule_free(void *vrule)
*/
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;
}
@@ -3845,8 +3874,8 @@ static __init int smack_init(void)
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;
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-21 15:28:06 +0000