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-rw-r--r--net/ipv4/cipso_ipv4.c130
-rw-r--r--net/ipv4/syncookies.c9
-rw-r--r--net/ipv4/tcp_ipv4.c7
-rw-r--r--net/netlabel/netlabel_kapi.c165
-rw-r--r--net/socket.c2
5 files changed, 272 insertions, 41 deletions
diff --git a/net/ipv4/cipso_ipv4.c b/net/ipv4/cipso_ipv4.c
index 7bc992976d2..039cc1ffe97 100644
--- a/net/ipv4/cipso_ipv4.c
+++ b/net/ipv4/cipso_ipv4.c
@@ -1942,23 +1942,85 @@ socket_setattr_failure:
}
/**
- * cipso_v4_sock_delattr - Delete the CIPSO option from a socket
- * @sk: the socket
+ * cipso_v4_req_setattr - Add a CIPSO option to a connection request socket
+ * @req: the connection request socket
+ * @doi_def: the CIPSO DOI to use
+ * @secattr: the specific security attributes of the socket
*
* Description:
- * Removes the CIPSO option from a socket, if present.
+ * Set the CIPSO option on the given socket using the DOI definition and
+ * security attributes passed to the function. Returns zero on success and
+ * negative values on failure.
*
*/
-void cipso_v4_sock_delattr(struct sock *sk)
+int cipso_v4_req_setattr(struct request_sock *req,
+ const struct cipso_v4_doi *doi_def,
+ const struct netlbl_lsm_secattr *secattr)
{
- u8 hdr_delta;
- struct ip_options *opt;
- struct inet_sock *sk_inet;
+ int ret_val = -EPERM;
+ unsigned char *buf = NULL;
+ u32 buf_len;
+ u32 opt_len;
+ struct ip_options *opt = NULL;
+ struct inet_request_sock *req_inet;
- sk_inet = inet_sk(sk);
- opt = sk_inet->opt;
- if (opt == NULL || opt->cipso == 0)
- return;
+ /* We allocate the maximum CIPSO option size here so we are probably
+ * being a little wasteful, but it makes our life _much_ easier later
+ * on and after all we are only talking about 40 bytes. */
+ buf_len = CIPSO_V4_OPT_LEN_MAX;
+ buf = kmalloc(buf_len, GFP_ATOMIC);
+ if (buf == NULL) {
+ ret_val = -ENOMEM;
+ goto req_setattr_failure;
+ }
+
+ ret_val = cipso_v4_genopt(buf, buf_len, doi_def, secattr);
+ if (ret_val < 0)
+ goto req_setattr_failure;
+ buf_len = ret_val;
+
+ /* We can't use ip_options_get() directly because it makes a call to
+ * ip_options_get_alloc() which allocates memory with GFP_KERNEL and
+ * we won't always have CAP_NET_RAW even though we _always_ want to
+ * set the IPOPT_CIPSO option. */
+ opt_len = (buf_len + 3) & ~3;
+ opt = kzalloc(sizeof(*opt) + opt_len, GFP_ATOMIC);
+ if (opt == NULL) {
+ ret_val = -ENOMEM;
+ goto req_setattr_failure;
+ }
+ memcpy(opt->__data, buf, buf_len);
+ opt->optlen = opt_len;
+ opt->cipso = sizeof(struct iphdr);
+ kfree(buf);
+ buf = NULL;
+
+ req_inet = inet_rsk(req);
+ opt = xchg(&req_inet->opt, opt);
+ kfree(opt);
+
+ return 0;
+
+req_setattr_failure:
+ kfree(buf);
+ kfree(opt);
+ return ret_val;
+}
+
+/**
+ * cipso_v4_delopt - Delete the CIPSO option from a set of IP options
+ * @opt_ptr: IP option pointer
+ *
+ * Description:
+ * Deletes the CIPSO IP option from a set of IP options and makes the necessary
+ * adjustments to the IP option structure. Returns zero on success, negative
+ * values on failure.
+ *
+ */
+int cipso_v4_delopt(struct ip_options **opt_ptr)
+{
+ int hdr_delta = 0;
+ struct ip_options *opt = *opt_ptr;
if (opt->srr || opt->rr || opt->ts || opt->router_alert) {
u8 cipso_len;
@@ -2003,11 +2065,34 @@ void cipso_v4_sock_delattr(struct sock *sk)
} else {
/* only the cipso option was present on the socket so we can
* remove the entire option struct */
- sk_inet->opt = NULL;
+ *opt_ptr = NULL;
hdr_delta = opt->optlen;
kfree(opt);
}
+ return hdr_delta;
+}
+
+/**
+ * cipso_v4_sock_delattr - Delete the CIPSO option from a socket
+ * @sk: the socket
+ *
+ * Description:
+ * Removes the CIPSO option from a socket, if present.
+ *
+ */
+void cipso_v4_sock_delattr(struct sock *sk)
+{
+ int hdr_delta;
+ struct ip_options *opt;
+ struct inet_sock *sk_inet;
+
+ sk_inet = inet_sk(sk);
+ opt = sk_inet->opt;
+ if (opt == NULL || opt->cipso == 0)
+ return;
+
+ hdr_delta = cipso_v4_delopt(&sk_inet->opt);
if (sk_inet->is_icsk && hdr_delta > 0) {
struct inet_connection_sock *sk_conn = inet_csk(sk);
sk_conn->icsk_ext_hdr_len -= hdr_delta;
@@ -2016,6 +2101,27 @@ void cipso_v4_sock_delattr(struct sock *sk)
}
/**
+ * cipso_v4_req_delattr - Delete the CIPSO option from a request socket
+ * @reg: the request socket
+ *
+ * Description:
+ * Removes the CIPSO option from a request socket, if present.
+ *
+ */
+void cipso_v4_req_delattr(struct request_sock *req)
+{
+ struct ip_options *opt;
+ struct inet_request_sock *req_inet;
+
+ req_inet = inet_rsk(req);
+ opt = req_inet->opt;
+ if (opt == NULL || opt->cipso == 0)
+ return;
+
+ cipso_v4_delopt(&req_inet->opt);
+}
+
+/**
* cipso_v4_getattr - Helper function for the cipso_v4_*_getattr functions
* @cipso: the CIPSO v4 option
* @secattr: the security attributes
diff --git a/net/ipv4/syncookies.c b/net/ipv4/syncookies.c
index d346c22aa6a..b35a950d2e0 100644
--- a/net/ipv4/syncookies.c
+++ b/net/ipv4/syncookies.c
@@ -288,10 +288,6 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb,
if (!req)
goto out;
- if (security_inet_conn_request(sk, skb, req)) {
- reqsk_free(req);
- goto out;
- }
ireq = inet_rsk(req);
treq = tcp_rsk(req);
treq->rcv_isn = ntohl(th->seq) - 1;
@@ -322,6 +318,11 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb,
}
}
+ if (security_inet_conn_request(sk, skb, req)) {
+ reqsk_free(req);
+ goto out;
+ }
+
req->expires = 0UL;
req->retrans = 0;
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index d0a314879d8..5d427f86b41 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -1230,14 +1230,15 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
tcp_openreq_init(req, &tmp_opt, skb);
- if (security_inet_conn_request(sk, skb, req))
- goto drop_and_free;
-
ireq = inet_rsk(req);
ireq->loc_addr = daddr;
ireq->rmt_addr = saddr;
ireq->no_srccheck = inet_sk(sk)->transparent;
ireq->opt = tcp_v4_save_options(sk, skb);
+
+ if (security_inet_conn_request(sk, skb, req))
+ goto drop_and_free;
+
if (!want_cookie)
TCP_ECN_create_request(req, tcp_hdr(skb));
diff --git a/net/netlabel/netlabel_kapi.c b/net/netlabel/netlabel_kapi.c
index fd9229db075..b0e582f2d37 100644
--- a/net/netlabel/netlabel_kapi.c
+++ b/net/netlabel/netlabel_kapi.c
@@ -619,8 +619,9 @@ int netlbl_enabled(void)
}
/**
- * netlbl_socket_setattr - Label a socket using the correct protocol
+ * netlbl_sock_setattr - Label a socket using the correct protocol
* @sk: the socket to label
+ * @family: protocol family
* @secattr: the security attributes
*
* Description:
@@ -633,29 +634,45 @@ int netlbl_enabled(void)
*
*/
int netlbl_sock_setattr(struct sock *sk,
+ u16 family,
const struct netlbl_lsm_secattr *secattr)
{
- int ret_val = -ENOENT;
+ int ret_val;
struct netlbl_dom_map *dom_entry;
rcu_read_lock();
dom_entry = netlbl_domhsh_getentry(secattr->domain);
- if (dom_entry == NULL)
+ if (dom_entry == NULL) {
+ ret_val = -ENOENT;
goto socket_setattr_return;
- switch (dom_entry->type) {
- case NETLBL_NLTYPE_ADDRSELECT:
- ret_val = -EDESTADDRREQ;
- break;
- case NETLBL_NLTYPE_CIPSOV4:
- ret_val = cipso_v4_sock_setattr(sk,
- dom_entry->type_def.cipsov4,
- secattr);
+ }
+ switch (family) {
+ case AF_INET:
+ switch (dom_entry->type) {
+ case NETLBL_NLTYPE_ADDRSELECT:
+ ret_val = -EDESTADDRREQ;
+ break;
+ case NETLBL_NLTYPE_CIPSOV4:
+ ret_val = cipso_v4_sock_setattr(sk,
+ dom_entry->type_def.cipsov4,
+ secattr);
+ break;
+ case NETLBL_NLTYPE_UNLABELED:
+ ret_val = 0;
+ break;
+ default:
+ ret_val = -ENOENT;
+ }
break;
- case NETLBL_NLTYPE_UNLABELED:
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case AF_INET6:
+ /* since we don't support any IPv6 labeling protocols right
+ * now we can optimize everything away until we do */
ret_val = 0;
break;
+#endif /* IPv6 */
default:
- ret_val = -ENOENT;
+ ret_val = -EPROTONOSUPPORT;
}
socket_setattr_return:
@@ -689,9 +706,25 @@ void netlbl_sock_delattr(struct sock *sk)
* on failure.
*
*/
-int netlbl_sock_getattr(struct sock *sk, struct netlbl_lsm_secattr *secattr)
+int netlbl_sock_getattr(struct sock *sk,
+ struct netlbl_lsm_secattr *secattr)
{
- return cipso_v4_sock_getattr(sk, secattr);
+ int ret_val;
+
+ switch (sk->sk_family) {
+ case AF_INET:
+ ret_val = cipso_v4_sock_getattr(sk, secattr);
+ break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case AF_INET6:
+ ret_val = -ENOMSG;
+ break;
+#endif /* IPv6 */
+ default:
+ ret_val = -EPROTONOSUPPORT;
+ }
+
+ return ret_val;
}
/**
@@ -748,7 +781,7 @@ int netlbl_conn_setattr(struct sock *sk,
break;
#endif /* IPv6 */
default:
- ret_val = 0;
+ ret_val = -EPROTONOSUPPORT;
}
conn_setattr_return:
@@ -757,6 +790,90 @@ conn_setattr_return:
}
/**
+ * netlbl_req_setattr - Label a request socket using the correct protocol
+ * @req: the request socket to label
+ * @secattr: the security attributes
+ *
+ * Description:
+ * Attach the correct label to the given socket using the security attributes
+ * specified in @secattr. Returns zero on success, negative values on failure.
+ *
+ */
+int netlbl_req_setattr(struct request_sock *req,
+ const struct netlbl_lsm_secattr *secattr)
+{
+ int ret_val;
+ struct netlbl_dom_map *dom_entry;
+ struct netlbl_domaddr4_map *af4_entry;
+ u32 proto_type;
+ struct cipso_v4_doi *proto_cv4;
+
+ rcu_read_lock();
+ dom_entry = netlbl_domhsh_getentry(secattr->domain);
+ if (dom_entry == NULL) {
+ ret_val = -ENOENT;
+ goto req_setattr_return;
+ }
+ switch (req->rsk_ops->family) {
+ case AF_INET:
+ if (dom_entry->type == NETLBL_NLTYPE_ADDRSELECT) {
+ struct inet_request_sock *req_inet = inet_rsk(req);
+ af4_entry = netlbl_domhsh_getentry_af4(secattr->domain,
+ req_inet->rmt_addr);
+ if (af4_entry == NULL) {
+ ret_val = -ENOENT;
+ goto req_setattr_return;
+ }
+ proto_type = af4_entry->type;
+ proto_cv4 = af4_entry->type_def.cipsov4;
+ } else {
+ proto_type = dom_entry->type;
+ proto_cv4 = dom_entry->type_def.cipsov4;
+ }
+ switch (proto_type) {
+ case NETLBL_NLTYPE_CIPSOV4:
+ ret_val = cipso_v4_req_setattr(req, proto_cv4, secattr);
+ break;
+ case NETLBL_NLTYPE_UNLABELED:
+ /* just delete the protocols we support for right now
+ * but we could remove other protocols if needed */
+ cipso_v4_req_delattr(req);
+ ret_val = 0;
+ break;
+ default:
+ ret_val = -ENOENT;
+ }
+ break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case AF_INET6:
+ /* since we don't support any IPv6 labeling protocols right
+ * now we can optimize everything away until we do */
+ ret_val = 0;
+ break;
+#endif /* IPv6 */
+ default:
+ ret_val = -EPROTONOSUPPORT;
+ }
+
+req_setattr_return:
+ rcu_read_unlock();
+ return ret_val;
+}
+
+/**
+* netlbl_req_delattr - Delete all the NetLabel labels on a socket
+* @req: the socket
+*
+* Description:
+* Remove all the NetLabel labeling from @req.
+*
+*/
+void netlbl_req_delattr(struct request_sock *req)
+{
+ cipso_v4_req_delattr(req);
+}
+
+/**
* netlbl_skbuff_setattr - Label a packet using the correct protocol
* @skb: the packet
* @family: protocol family
@@ -808,7 +925,7 @@ int netlbl_skbuff_setattr(struct sk_buff *skb,
break;
#endif /* IPv6 */
default:
- ret_val = 0;
+ ret_val = -EPROTONOSUPPORT;
}
skbuff_setattr_return:
@@ -833,9 +950,17 @@ int netlbl_skbuff_getattr(const struct sk_buff *skb,
u16 family,
struct netlbl_lsm_secattr *secattr)
{
- if (CIPSO_V4_OPTEXIST(skb) &&
- cipso_v4_skbuff_getattr(skb, secattr) == 0)
- return 0;
+ switch (family) {
+ case AF_INET:
+ if (CIPSO_V4_OPTEXIST(skb) &&
+ cipso_v4_skbuff_getattr(skb, secattr) == 0)
+ return 0;
+ break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case AF_INET6:
+ break;
+#endif /* IPv6 */
+ }
return netlbl_unlabel_getattr(skb, family, secattr);
}
diff --git a/net/socket.c b/net/socket.c
index 0b14b79c03a..91d0c0254ff 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -1536,8 +1536,6 @@ SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr,
fd_install(newfd, newfile);
err = newfd;
- security_socket_post_accept(sock, newsock);
-
out_put:
fput_light(sock->file, fput_needed);
out:
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-21 03:44:36 +0000