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Diffstat (limited to 'security/smack/smack_lsm.c')
-rw-r--r--security/smack/smack_lsm.c219
1 files changed, 165 insertions, 54 deletions
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index f1b17a476e12..c934311812f1 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -43,8 +43,6 @@
#include <linux/binfmts.h>
#include "smack.h"
-#define task_security(task) (task_cred_xxx((task), security))
-
#define TRANS_TRUE "TRUE"
#define TRANS_TRUE_SIZE 4
@@ -52,8 +50,11 @@
#define SMK_RECEIVING 1
#define SMK_SENDING 2
+#if IS_ENABLED(CONFIG_IPV6) && !defined(CONFIG_SECURITY_SMACK_NETFILTER)
LIST_HEAD(smk_ipv6_port_list);
+#endif /* CONFIG_IPV6 && !CONFIG_SECURITY_SMACK_NETFILTER */
static struct kmem_cache *smack_inode_cache;
+int smack_enabled;
#ifdef CONFIG_SECURITY_SMACK_BRINGUP
static void smk_bu_mode(int mode, char *s)
@@ -120,7 +121,7 @@ static int smk_bu_current(char *note, struct smack_known *oskp,
static int smk_bu_task(struct task_struct *otp, int mode, int rc)
{
struct task_smack *tsp = current_security();
- struct task_smack *otsp = task_security(otp);
+ struct smack_known *smk_task = smk_of_task_struct(otp);
char acc[SMK_NUM_ACCESS_TYPE + 1];
if (rc <= 0)
@@ -128,7 +129,7 @@ static int smk_bu_task(struct task_struct *otp, int mode, int rc)
smk_bu_mode(mode, acc);
pr_info("Smack Bringup: (%s %s %s) %s to %s\n",
- tsp->smk_task->smk_known, otsp->smk_task->smk_known, acc,
+ tsp->smk_task->smk_known, smk_task->smk_known, acc,
current->comm, otp->comm);
return 0;
}
@@ -160,7 +161,7 @@ static int smk_bu_file(struct file *file, int mode, int rc)
{
struct task_smack *tsp = current_security();
struct smack_known *sskp = tsp->smk_task;
- struct inode *inode = file->f_inode;
+ struct inode *inode = file_inode(file);
char acc[SMK_NUM_ACCESS_TYPE + 1];
if (rc <= 0)
@@ -168,7 +169,7 @@ static int smk_bu_file(struct file *file, int mode, int rc)
smk_bu_mode(mode, acc);
pr_info("Smack Bringup: (%s %s %s) file=(%s %ld %pD) %s\n",
- sskp->smk_known, (char *)file->f_security, acc,
+ sskp->smk_known, smk_of_inode(inode)->smk_known, acc,
inode->i_sb->s_id, inode->i_ino, file,
current->comm);
return 0;
@@ -202,6 +203,7 @@ static int smk_bu_credfile(const struct cred *cred, struct file *file,
/**
* smk_fetch - Fetch the smack label from a file.
+ * @name: type of the label (attribute)
* @ip: a pointer to the inode
* @dp: a pointer to the dentry
*
@@ -254,7 +256,9 @@ struct inode_smack *new_inode_smack(struct smack_known *skp)
/**
* new_task_smack - allocate a task security blob
- * @smack: a pointer to the Smack label to use in the blob
+ * @task: a pointer to the Smack label for the running task
+ * @forked: a pointer to the Smack label for the forked task
+ * @gfp: type of the memory for the allocation
*
* Returns the new blob or NULL if there's no memory available
*/
@@ -277,8 +281,9 @@ static struct task_smack *new_task_smack(struct smack_known *task,
/**
* smk_copy_rules - copy a rule set
- * @nhead - new rules header pointer
- * @ohead - old rules header pointer
+ * @nhead: new rules header pointer
+ * @ohead: old rules header pointer
+ * @gfp: type of the memory for the allocation
*
* Returns 0 on success, -ENOMEM on error
*/
@@ -345,7 +350,8 @@ static int smk_ptrace_rule_check(struct task_struct *tracer,
saip = &ad;
}
- tsp = task_security(tracer);
+ rcu_read_lock();
+ tsp = __task_cred(tracer)->security;
tracer_known = smk_of_task(tsp);
if ((mode & PTRACE_MODE_ATTACH) &&
@@ -365,11 +371,14 @@ static int smk_ptrace_rule_check(struct task_struct *tracer,
tracee_known->smk_known,
0, rc, saip);
+ rcu_read_unlock();
return rc;
}
/* In case of rule==SMACK_PTRACE_DEFAULT or mode==PTRACE_MODE_READ */
rc = smk_tskacc(tsp, tracee_known, smk_ptrace_mode(mode), saip);
+
+ rcu_read_unlock();
return rc;
}
@@ -396,7 +405,7 @@ static int smack_ptrace_access_check(struct task_struct *ctp, unsigned int mode)
if (rc != 0)
return rc;
- skp = smk_of_task(task_security(ctp));
+ skp = smk_of_task_struct(ctp);
rc = smk_ptrace_rule_check(current, skp, mode, __func__);
return rc;
@@ -796,7 +805,7 @@ static int smack_inode_init_security(struct inode *inode, struct inode *dir,
if (name)
*name = XATTR_SMACK_SUFFIX;
- if (value) {
+ if (value && len) {
rcu_read_lock();
may = smk_access_entry(skp->smk_known, dsp->smk_known,
&skp->smk_rules);
@@ -817,10 +826,9 @@ static int smack_inode_init_security(struct inode *inode, struct inode *dir,
*value = kstrdup(isp->smk_known, GFP_NOFS);
if (*value == NULL)
return -ENOMEM;
- }
- if (len)
*len = strlen(isp->smk_known);
+ }
return 0;
}
@@ -847,7 +855,7 @@ static int smack_inode_link(struct dentry *old_dentry, struct inode *dir,
rc = smk_curacc(isp, MAY_WRITE, &ad);
rc = smk_bu_inode(old_dentry->d_inode, MAY_WRITE, rc);
- if (rc == 0 && new_dentry->d_inode != NULL) {
+ if (rc == 0 && d_is_positive(new_dentry)) {
isp = smk_of_inode(new_dentry->d_inode);
smk_ad_setfield_u_fs_path_dentry(&ad, new_dentry);
rc = smk_curacc(isp, MAY_WRITE, &ad);
@@ -953,7 +961,7 @@ static int smack_inode_rename(struct inode *old_inode,
rc = smk_curacc(isp, MAY_READWRITE, &ad);
rc = smk_bu_inode(old_dentry->d_inode, MAY_READWRITE, rc);
- if (rc == 0 && new_dentry->d_inode != NULL) {
+ if (rc == 0 && d_is_positive(new_dentry)) {
isp = smk_of_inode(new_dentry->d_inode);
smk_ad_setfield_u_fs_path_dentry(&ad, new_dentry);
rc = smk_curacc(isp, MAY_READWRITE, &ad);
@@ -1344,6 +1352,9 @@ static int smack_file_permission(struct file *file, int mask)
* The security blob for a file is a pointer to the master
* label list, so no allocation is done.
*
+ * f_security is the owner security information. It
+ * isn't used on file access checks, it's for send_sigio.
+ *
* Returns 0
*/
static int smack_file_alloc_security(struct file *file)
@@ -1381,17 +1392,18 @@ static int smack_file_ioctl(struct file *file, unsigned int cmd,
{
int rc = 0;
struct smk_audit_info ad;
+ struct inode *inode = file_inode(file);
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_PATH);
smk_ad_setfield_u_fs_path(&ad, file->f_path);
if (_IOC_DIR(cmd) & _IOC_WRITE) {
- rc = smk_curacc(file->f_security, MAY_WRITE, &ad);
+ rc = smk_curacc(smk_of_inode(inode), MAY_WRITE, &ad);
rc = smk_bu_file(file, MAY_WRITE, rc);
}
if (rc == 0 && (_IOC_DIR(cmd) & _IOC_READ)) {
- rc = smk_curacc(file->f_security, MAY_READ, &ad);
+ rc = smk_curacc(smk_of_inode(inode), MAY_READ, &ad);
rc = smk_bu_file(file, MAY_READ, rc);
}
@@ -1409,10 +1421,11 @@ static int smack_file_lock(struct file *file, unsigned int cmd)
{
struct smk_audit_info ad;
int rc;
+ struct inode *inode = file_inode(file);
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_PATH);
smk_ad_setfield_u_fs_path(&ad, file->f_path);
- rc = smk_curacc(file->f_security, MAY_LOCK, &ad);
+ rc = smk_curacc(smk_of_inode(inode), MAY_LOCK, &ad);
rc = smk_bu_file(file, MAY_LOCK, rc);
return rc;
}
@@ -1434,7 +1447,7 @@ static int smack_file_fcntl(struct file *file, unsigned int cmd,
{
struct smk_audit_info ad;
int rc = 0;
-
+ struct inode *inode = file_inode(file);
switch (cmd) {
case F_GETLK:
@@ -1443,14 +1456,14 @@ static int smack_file_fcntl(struct file *file, unsigned int cmd,
case F_SETLKW:
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_PATH);
smk_ad_setfield_u_fs_path(&ad, file->f_path);
- rc = smk_curacc(file->f_security, MAY_LOCK, &ad);
+ rc = smk_curacc(smk_of_inode(inode), MAY_LOCK, &ad);
rc = smk_bu_file(file, MAY_LOCK, rc);
break;
case F_SETOWN:
case F_SETSIG:
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_PATH);
smk_ad_setfield_u_fs_path(&ad, file->f_path);
- rc = smk_curacc(file->f_security, MAY_WRITE, &ad);
+ rc = smk_curacc(smk_of_inode(inode), MAY_WRITE, &ad);
rc = smk_bu_file(file, MAY_WRITE, rc);
break;
default:
@@ -1568,14 +1581,10 @@ static int smack_mmap_file(struct file *file,
* smack_file_set_fowner - set the file security blob value
* @file: object in question
*
- * Returns 0
- * Further research may be required on this one.
*/
static void smack_file_set_fowner(struct file *file)
{
- struct smack_known *skp = smk_of_current();
-
- file->f_security = skp;
+ file->f_security = smk_of_current();
}
/**
@@ -1627,6 +1636,7 @@ static int smack_file_receive(struct file *file)
int rc;
int may = 0;
struct smk_audit_info ad;
+ struct inode *inode = file_inode(file);
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_PATH);
smk_ad_setfield_u_fs_path(&ad, file->f_path);
@@ -1638,7 +1648,7 @@ static int smack_file_receive(struct file *file)
if (file->f_mode & FMODE_WRITE)
may |= MAY_WRITE;
- rc = smk_curacc(file->f_security, may, &ad);
+ rc = smk_curacc(smk_of_inode(inode), may, &ad);
rc = smk_bu_file(file, may, rc);
return rc;
}
@@ -1658,21 +1668,17 @@ static int smack_file_receive(struct file *file)
static int smack_file_open(struct file *file, const struct cred *cred)
{
struct task_smack *tsp = cred->security;
- struct inode_smack *isp = file_inode(file)->i_security;
+ struct inode *inode = file_inode(file);
struct smk_audit_info ad;
int rc;
- if (smack_privileged(CAP_MAC_OVERRIDE)) {
- file->f_security = isp->smk_inode;
+ if (smack_privileged(CAP_MAC_OVERRIDE))
return 0;
- }
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_PATH);
smk_ad_setfield_u_fs_path(&ad, file->f_path);
- rc = smk_access(tsp->smk_task, isp->smk_inode, MAY_READ, &ad);
+ rc = smk_access(tsp->smk_task, smk_of_inode(inode), MAY_READ, &ad);
rc = smk_bu_credfile(cred, file, MAY_READ, rc);
- if (rc == 0)
- file->f_security = isp->smk_inode;
return rc;
}
@@ -1826,7 +1832,7 @@ 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));
+ struct smack_known *skp = smk_of_task_struct(p);
int rc;
smk_ad_init(&ad, caller, LSM_AUDIT_DATA_TASK);
@@ -1879,7 +1885,7 @@ static int smack_task_getsid(struct task_struct *p)
*/
static void smack_task_getsecid(struct task_struct *p, u32 *secid)
{
- struct smack_known *skp = smk_of_task(task_security(p));
+ struct smack_known *skp = smk_of_task_struct(p);
*secid = skp->smk_secid;
}
@@ -1986,7 +1992,7 @@ static int smack_task_kill(struct task_struct *p, struct siginfo *info,
{
struct smk_audit_info ad;
struct smack_known *skp;
- struct smack_known *tkp = smk_of_task(task_security(p));
+ struct smack_known *tkp = smk_of_task_struct(p);
int rc;
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK);
@@ -2040,7 +2046,7 @@ 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;
- struct smack_known *skp = smk_of_task(task_security(p));
+ struct smack_known *skp = smk_of_task_struct(p);
isp->smk_inode = skp;
}
@@ -2212,6 +2218,7 @@ static int smack_netlabel_send(struct sock *sk, struct sockaddr_in *sap)
return smack_netlabel(sk, sk_lbl);
}
+#if IS_ENABLED(CONFIG_IPV6) && !defined(CONFIG_SECURITY_SMACK_NETFILTER)
/**
* smk_ipv6_port_label - Smack port access table management
* @sock: socket
@@ -2361,6 +2368,7 @@ auditout:
rc = smk_bu_note("IPv6 port check", skp, object, MAY_WRITE, rc);
return rc;
}
+#endif /* CONFIG_IPV6 && !CONFIG_SECURITY_SMACK_NETFILTER */
/**
* smack_inode_setsecurity - set smack xattrs
@@ -2421,8 +2429,10 @@ static int smack_inode_setsecurity(struct inode *inode, const char *name,
} else
return -EOPNOTSUPP;
+#if IS_ENABLED(CONFIG_IPV6) && !defined(CONFIG_SECURITY_SMACK_NETFILTER)
if (sock->sk->sk_family == PF_INET6)
smk_ipv6_port_label(sock, NULL);
+#endif /* CONFIG_IPV6 && !CONFIG_SECURITY_SMACK_NETFILTER */
return 0;
}
@@ -2450,6 +2460,7 @@ static int smack_socket_post_create(struct socket *sock, int family,
return smack_netlabel(sock->sk, SMACK_CIPSO_SOCKET);
}
+#ifndef CONFIG_SECURITY_SMACK_NETFILTER
/**
* smack_socket_bind - record port binding information.
* @sock: the socket
@@ -2463,11 +2474,14 @@ static int smack_socket_post_create(struct socket *sock, int family,
static int smack_socket_bind(struct socket *sock, struct sockaddr *address,
int addrlen)
{
+#if IS_ENABLED(CONFIG_IPV6)
if (sock->sk != NULL && sock->sk->sk_family == PF_INET6)
smk_ipv6_port_label(sock, address);
+#endif
return 0;
}
+#endif /* !CONFIG_SECURITY_SMACK_NETFILTER */
/**
* smack_socket_connect - connect access check
@@ -2496,8 +2510,10 @@ static int smack_socket_connect(struct socket *sock, struct sockaddr *sap,
case PF_INET6:
if (addrlen < sizeof(struct sockaddr_in6))
return -EINVAL;
+#if IS_ENABLED(CONFIG_IPV6) && !defined(CONFIG_SECURITY_SMACK_NETFILTER)
rc = smk_ipv6_port_check(sock->sk, (struct sockaddr_in6 *)sap,
SMK_CONNECTING);
+#endif /* CONFIG_IPV6 && !CONFIG_SECURITY_SMACK_NETFILTER */
break;
}
return rc;
@@ -3033,7 +3049,8 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
* of the superblock.
*/
if (opt_dentry->d_parent == opt_dentry) {
- if (sbp->s_magic == CGROUP_SUPER_MAGIC) {
+ switch (sbp->s_magic) {
+ case CGROUP_SUPER_MAGIC:
/*
* The cgroup filesystem is never mounted,
* so there's no opportunity to set the mount
@@ -3041,8 +3058,19 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
*/
sbsp->smk_root = &smack_known_star;
sbsp->smk_default = &smack_known_star;
+ isp->smk_inode = sbsp->smk_root;
+ break;
+ case TMPFS_MAGIC:
+ /*
+ * What about shmem/tmpfs anonymous files with dentry
+ * obtained from d_alloc_pseudo()?
+ */
+ isp->smk_inode = smk_of_current();
+ break;
+ default:
+ isp->smk_inode = sbsp->smk_root;
+ break;
}
- isp->smk_inode = sbsp->smk_root;
isp->smk_flags |= SMK_INODE_INSTANT;
goto unlockandout;
}
@@ -3200,7 +3228,7 @@ unlockandout:
*/
static int smack_getprocattr(struct task_struct *p, char *name, char **value)
{
- struct smack_known *skp = smk_of_task(task_security(p));
+ struct smack_known *skp = smk_of_task_struct(p);
char *cp;
int slen;
@@ -3297,7 +3325,7 @@ static int smack_unix_stream_connect(struct sock *sock,
if (!smack_privileged(CAP_MAC_OVERRIDE)) {
skp = ssp->smk_out;
- okp = osp->smk_out;
+ okp = osp->smk_in;
#ifdef CONFIG_AUDIT
smk_ad_init_net(&ad, __func__, LSM_AUDIT_DATA_NET, &net);
smk_ad_setfield_u_net_sk(&ad, other);
@@ -3305,7 +3333,9 @@ static int smack_unix_stream_connect(struct sock *sock,
rc = smk_access(skp, okp, MAY_WRITE, &ad);
rc = smk_bu_note("UDS connect", skp, okp, MAY_WRITE, rc);
if (rc == 0) {
- rc = smk_access(okp, skp, MAY_WRITE, NULL);
+ okp = osp->smk_out;
+ skp = ssp->smk_in;
+ rc = smk_access(okp, skp, MAY_WRITE, &ad);
rc = smk_bu_note("UDS connect", okp, skp,
MAY_WRITE, rc);
}
@@ -3366,7 +3396,9 @@ static int smack_socket_sendmsg(struct socket *sock, struct msghdr *msg,
int size)
{
struct sockaddr_in *sip = (struct sockaddr_in *) msg->msg_name;
+#if IS_ENABLED(CONFIG_IPV6) && !defined(CONFIG_SECURITY_SMACK_NETFILTER)
struct sockaddr_in6 *sap = (struct sockaddr_in6 *) msg->msg_name;
+#endif /* CONFIG_IPV6 && !CONFIG_SECURITY_SMACK_NETFILTER */
int rc = 0;
/*
@@ -3380,7 +3412,9 @@ static int smack_socket_sendmsg(struct socket *sock, struct msghdr *msg,
rc = smack_netlabel_send(sock->sk, sip);
break;
case AF_INET6:
+#if IS_ENABLED(CONFIG_IPV6) && !defined(CONFIG_SECURITY_SMACK_NETFILTER)
rc = smk_ipv6_port_check(sock->sk, sap, SMK_SENDING);
+#endif /* CONFIG_IPV6 && !CONFIG_SECURITY_SMACK_NETFILTER */
break;
}
return rc;
@@ -3471,6 +3505,7 @@ static struct smack_known *smack_from_secattr(struct netlbl_lsm_secattr *sap,
return smack_net_ambient;
}
+#if IS_ENABLED(CONFIG_IPV6)
static int smk_skb_to_addr_ipv6(struct sk_buff *skb, struct sockaddr_in6 *sip)
{
u8 nexthdr;
@@ -3517,6 +3552,7 @@ static int smk_skb_to_addr_ipv6(struct sk_buff *skb, struct sockaddr_in6 *sip)
}
return proto;
}
+#endif /* CONFIG_IPV6 */
/**
* smack_socket_sock_rcv_skb - Smack packet delivery access check
@@ -3529,15 +3565,30 @@ 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_in6 sadd;
+ struct smack_known *skp = NULL;
int rc = 0;
struct smk_audit_info ad;
#ifdef CONFIG_AUDIT
struct lsm_network_audit net;
#endif
+#if IS_ENABLED(CONFIG_IPV6)
+ struct sockaddr_in6 sadd;
+ int proto;
+#endif /* CONFIG_IPV6 */
+
switch (sk->sk_family) {
case PF_INET:
+#ifdef CONFIG_SECURITY_SMACK_NETFILTER
+ /*
+ * If there is a secmark use it rather than the CIPSO label.
+ * If there is no secmark fall back to CIPSO.
+ * The secmark is assumed to reflect policy better.
+ */
+ if (skb && skb->secmark != 0) {
+ skp = smack_from_secid(skb->secmark);
+ goto access_check;
+ }
+#endif /* CONFIG_SECURITY_SMACK_NETFILTER */
/*
* Translate what netlabel gave us.
*/
@@ -3551,6 +3602,9 @@ static int smack_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
netlbl_secattr_destroy(&secattr);
+#ifdef CONFIG_SECURITY_SMACK_NETFILTER
+access_check:
+#endif
#ifdef CONFIG_AUDIT
smk_ad_init_net(&ad, __func__, LSM_AUDIT_DATA_NET, &net);
ad.a.u.net->family = sk->sk_family;
@@ -3569,14 +3623,32 @@ static int smack_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
if (rc != 0)
netlbl_skbuff_err(skb, rc, 0);
break;
+#if IS_ENABLED(CONFIG_IPV6)
case PF_INET6:
- rc = smk_skb_to_addr_ipv6(skb, &sadd);
- if (rc == IPPROTO_UDP || rc == IPPROTO_TCP)
- rc = smk_ipv6_port_check(sk, &sadd, SMK_RECEIVING);
+ proto = smk_skb_to_addr_ipv6(skb, &sadd);
+ if (proto != IPPROTO_UDP && proto != IPPROTO_TCP)
+ break;
+#ifdef CONFIG_SECURITY_SMACK_NETFILTER
+ if (skb && skb->secmark != 0)
+ skp = smack_from_secid(skb->secmark);
else
- rc = 0;
+ skp = smack_net_ambient;
+#ifdef CONFIG_AUDIT
+ smk_ad_init_net(&ad, __func__, LSM_AUDIT_DATA_NET, &net);
+ ad.a.u.net->family = sk->sk_family;
+ ad.a.u.net->netif = skb->skb_iif;
+ ipv6_skb_to_auditdata(skb, &ad.a, NULL);
+#endif /* CONFIG_AUDIT */
+ rc = smk_access(skp, ssp->smk_in, MAY_WRITE, &ad);
+ rc = smk_bu_note("IPv6 delivery", skp, ssp->smk_in,
+ MAY_WRITE, rc);
+#else /* CONFIG_SECURITY_SMACK_NETFILTER */
+ rc = smk_ipv6_port_check(sk, &sadd, SMK_RECEIVING);
+#endif /* CONFIG_SECURITY_SMACK_NETFILTER */
break;
+#endif /* CONFIG_IPV6 */
}
+
return rc;
}
@@ -3638,16 +3710,25 @@ static int smack_socket_getpeersec_dgram(struct socket *sock,
if (skb != NULL) {
if (skb->protocol == htons(ETH_P_IP))
family = PF_INET;
+#if IS_ENABLED(CONFIG_IPV6)
else if (skb->protocol == htons(ETH_P_IPV6))
family = PF_INET6;
+#endif /* CONFIG_IPV6 */
}
if (family == PF_UNSPEC && sock != NULL)
family = sock->sk->sk_family;
- if (family == PF_UNIX) {
+ switch (family) {
+ case PF_UNIX:
ssp = sock->sk->sk_security;
s = ssp->smk_out->smk_secid;
- } else if (family == PF_INET || family == PF_INET6) {
+ break;
+ case PF_INET:
+#ifdef CONFIG_SECURITY_SMACK_NETFILTER
+ s = skb->secmark;
+ if (s != 0)
+ break;
+#endif
/*
* Translate what netlabel gave us.
*/
@@ -3660,6 +3741,14 @@ static int smack_socket_getpeersec_dgram(struct socket *sock,
s = skp->smk_secid;
}
netlbl_secattr_destroy(&secattr);
+ break;
+#if IS_ENABLED(CONFIG_IPV6)
+ case PF_INET6:
+#ifdef CONFIG_SECURITY_SMACK_NETFILTER
+ s = skb->secmark;
+#endif /* CONFIG_SECURITY_SMACK_NETFILTER */
+ break;
+#endif /* CONFIG_IPV6 */
}
*secid = s;
if (s == 0)
@@ -3715,6 +3804,7 @@ static int smack_inet_conn_request(struct sock *sk, struct sk_buff *skb,
struct lsm_network_audit net;
#endif
+#if IS_ENABLED(CONFIG_IPV6)
if (family == PF_INET6) {
/*
* Handle mapped IPv4 packets arriving
@@ -3726,6 +3816,19 @@ static int smack_inet_conn_request(struct sock *sk, struct sk_buff *skb,
else
return 0;
}
+#endif /* CONFIG_IPV6 */
+
+#ifdef CONFIG_SECURITY_SMACK_NETFILTER
+ /*
+ * If there is a secmark use it rather than the CIPSO label.
+ * If there is no secmark fall back to CIPSO.
+ * The secmark is assumed to reflect policy better.
+ */
+ if (skb && skb->secmark != 0) {
+ skp = smack_from_secid(skb->secmark);
+ goto access_check;
+ }
+#endif /* CONFIG_SECURITY_SMACK_NETFILTER */
netlbl_secattr_init(&secattr);
rc = netlbl_skbuff_getattr(skb, family, &secattr);
@@ -3735,6 +3838,10 @@ static int smack_inet_conn_request(struct sock *sk, struct sk_buff *skb,
skp = &smack_known_huh;
netlbl_secattr_destroy(&secattr);
+#ifdef CONFIG_SECURITY_SMACK_NETFILTER
+access_check:
+#endif
+
#ifdef CONFIG_AUDIT
smk_ad_init_net(&ad, __func__, LSM_AUDIT_DATA_NET, &net);
ad.a.u.net->family = family;
@@ -3834,11 +3941,11 @@ static void smack_key_free(struct key *key)
key->security = NULL;
}
-/*
+/**
* smack_key_permission - Smack access on a key
* @key_ref: gets to the object
* @cred: the credentials to use
- * @perm: unused
+ * @perm: requested key permissions
*
* Return 0 if the task has read and write to the object,
* an error code otherwise
@@ -4184,7 +4291,9 @@ struct security_operations smack_ops = {
.unix_may_send = smack_unix_may_send,
.socket_post_create = smack_socket_post_create,
+#ifndef CONFIG_SECURITY_SMACK_NETFILTER
.socket_bind = smack_socket_bind,
+#endif /* CONFIG_SECURITY_SMACK_NETFILTER */
.socket_connect = smack_socket_connect,
.socket_sendmsg = smack_socket_sendmsg,
.socket_sock_rcv_skb = smack_socket_sock_rcv_skb,
@@ -4265,6 +4374,8 @@ static __init int smack_init(void)
if (!security_module_enable(&smack_ops))
return 0;
+ smack_enabled = 1;
+
smack_inode_cache = KMEM_CACHE(inode_smack, 0);
if (!smack_inode_cache)
return -ENOMEM;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-30 14:26:34 +0100