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-rw-r--r--include/net/cipso_ipv4.h6
-rw-r--r--include/net/netlabel.h12
-rw-r--r--net/ipv4/cipso_ipv4.c7
-rw-r--r--net/netlabel/netlabel_kapi.c31
-rw-r--r--security/selinux/netlabel.c5
-rw-r--r--security/smack/smack_lsm.c3
6 files changed, 52 insertions, 12 deletions
diff --git a/include/net/cipso_ipv4.h b/include/net/cipso_ipv4.h
index 53dd7d988a2d..c9111bb2f59b 100644
--- a/include/net/cipso_ipv4.h
+++ b/include/net/cipso_ipv4.h
@@ -183,7 +183,8 @@ int cipso_v4_getattr(const unsigned char *cipso,
struct netlbl_lsm_secattr *secattr);
int cipso_v4_sock_setattr(struct sock *sk,
const struct cipso_v4_doi *doi_def,
- const struct netlbl_lsm_secattr *secattr);
+ const struct netlbl_lsm_secattr *secattr,
+ bool sk_locked);
void cipso_v4_sock_delattr(struct sock *sk);
int cipso_v4_sock_getattr(struct sock *sk, struct netlbl_lsm_secattr *secattr);
int cipso_v4_req_setattr(struct request_sock *req,
@@ -214,7 +215,8 @@ static inline int cipso_v4_getattr(const unsigned char *cipso,
static inline int cipso_v4_sock_setattr(struct sock *sk,
const struct cipso_v4_doi *doi_def,
- const struct netlbl_lsm_secattr *secattr)
+ const struct netlbl_lsm_secattr *secattr,
+ bool sk_locked)
{
return -ENOSYS;
}
diff --git a/include/net/netlabel.h b/include/net/netlabel.h
index f3ab0b8a4b18..2133ad723fc1 100644
--- a/include/net/netlabel.h
+++ b/include/net/netlabel.h
@@ -470,7 +470,8 @@ void netlbl_bitmap_setbit(unsigned char *bitmap, u32 bit, u8 state);
int netlbl_enabled(void);
int netlbl_sock_setattr(struct sock *sk,
u16 family,
- const struct netlbl_lsm_secattr *secattr);
+ const struct netlbl_lsm_secattr *secattr,
+ bool sk_locked);
void netlbl_sock_delattr(struct sock *sk);
int netlbl_sock_getattr(struct sock *sk,
struct netlbl_lsm_secattr *secattr);
@@ -487,6 +488,7 @@ int netlbl_skbuff_getattr(const struct sk_buff *skb,
u16 family,
struct netlbl_lsm_secattr *secattr);
void netlbl_skbuff_err(struct sk_buff *skb, u16 family, int error, int gateway);
+bool netlbl_sk_lock_check(struct sock *sk);
/*
* LSM label mapping cache operations
@@ -614,7 +616,8 @@ static inline int netlbl_enabled(void)
}
static inline int netlbl_sock_setattr(struct sock *sk,
u16 family,
- const struct netlbl_lsm_secattr *secattr)
+ const struct netlbl_lsm_secattr *secattr,
+ bool sk_locked)
{
return -ENOSYS;
}
@@ -673,6 +676,11 @@ static inline struct audit_buffer *netlbl_audit_start(int type,
{
return NULL;
}
+
+static inline bool netlbl_sk_lock_check(struct sock *sk)
+{
+ return true;
+}
#endif /* CONFIG_NETLABEL */
const struct netlbl_calipso_ops *
diff --git a/net/ipv4/cipso_ipv4.c b/net/ipv4/cipso_ipv4.c
index 8b17d83e5fde..dd6d46015058 100644
--- a/net/ipv4/cipso_ipv4.c
+++ b/net/ipv4/cipso_ipv4.c
@@ -1815,6 +1815,7 @@ static int cipso_v4_genopt(unsigned char *buf, u32 buf_len,
* @sk: the socket
* @doi_def: the CIPSO DOI to use
* @secattr: the specific security attributes of the socket
+ * @sk_locked: true if caller holds the socket lock
*
* Description:
* Set the CIPSO option on the given socket using the DOI definition and
@@ -1826,7 +1827,8 @@ static int cipso_v4_genopt(unsigned char *buf, u32 buf_len,
*/
int cipso_v4_sock_setattr(struct sock *sk,
const struct cipso_v4_doi *doi_def,
- const struct netlbl_lsm_secattr *secattr)
+ const struct netlbl_lsm_secattr *secattr,
+ bool sk_locked)
{
int ret_val = -EPERM;
unsigned char *buf = NULL;
@@ -1876,8 +1878,7 @@ int cipso_v4_sock_setattr(struct sock *sk,
sk_inet = inet_sk(sk);
- old = rcu_dereference_protected(sk_inet->inet_opt,
- lockdep_sock_is_held(sk));
+ old = rcu_dereference_protected(sk_inet->inet_opt, sk_locked);
if (inet_test_bit(IS_ICSK, sk)) {
sk_conn = inet_csk(sk);
if (old)
diff --git a/net/netlabel/netlabel_kapi.c b/net/netlabel/netlabel_kapi.c
index 1ba4f58e1d35..cd9160bbc919 100644
--- a/net/netlabel/netlabel_kapi.c
+++ b/net/netlabel/netlabel_kapi.c
@@ -965,6 +965,7 @@ int netlbl_enabled(void)
* @sk: the socket to label
* @family: protocol family
* @secattr: the security attributes
+ * @sk_locked: true if caller holds the socket lock
*
* Description:
* Attach the correct label to the given socket using the security attributes
@@ -977,7 +978,8 @@ int netlbl_enabled(void)
*/
int netlbl_sock_setattr(struct sock *sk,
u16 family,
- const struct netlbl_lsm_secattr *secattr)
+ const struct netlbl_lsm_secattr *secattr,
+ bool sk_locked)
{
int ret_val;
struct netlbl_dom_map *dom_entry;
@@ -997,7 +999,7 @@ int netlbl_sock_setattr(struct sock *sk,
case NETLBL_NLTYPE_CIPSOV4:
ret_val = cipso_v4_sock_setattr(sk,
dom_entry->def.cipso,
- secattr);
+ secattr, sk_locked);
break;
case NETLBL_NLTYPE_UNLABELED:
ret_val = 0;
@@ -1091,6 +1093,28 @@ int netlbl_sock_getattr(struct sock *sk,
}
/**
+ * netlbl_sk_lock_check - Check if the socket lock has been acquired.
+ * @sk: the socket to be checked
+ *
+ * Return: true if socket @sk is locked or if lock debugging is disabled at
+ * runtime or compile-time; false otherwise
+ *
+ */
+#ifdef CONFIG_LOCKDEP
+bool netlbl_sk_lock_check(struct sock *sk)
+{
+ if (debug_locks)
+ return lockdep_sock_is_held(sk);
+ return true;
+}
+#else
+bool netlbl_sk_lock_check(struct sock *sk)
+{
+ return true;
+}
+#endif
+
+/**
* netlbl_conn_setattr - Label a connected socket using the correct protocol
* @sk: the socket to label
* @addr: the destination address
@@ -1126,7 +1150,8 @@ int netlbl_conn_setattr(struct sock *sk,
switch (entry->type) {
case NETLBL_NLTYPE_CIPSOV4:
ret_val = cipso_v4_sock_setattr(sk,
- entry->cipso, secattr);
+ entry->cipso, secattr,
+ netlbl_sk_lock_check(sk));
break;
case NETLBL_NLTYPE_UNLABELED:
/* just delete the protocols we support for right now
diff --git a/security/selinux/netlabel.c b/security/selinux/netlabel.c
index 8f182800e412..55885634e880 100644
--- a/security/selinux/netlabel.c
+++ b/security/selinux/netlabel.c
@@ -402,7 +402,10 @@ int selinux_netlbl_socket_post_create(struct sock *sk, u16 family)
secattr = selinux_netlbl_sock_genattr(sk);
if (secattr == NULL)
return -ENOMEM;
- rc = netlbl_sock_setattr(sk, family, secattr);
+ /* On socket creation, replacement of IP options is safe even if
+ * the caller does not hold the socket lock.
+ */
+ rc = netlbl_sock_setattr(sk, family, secattr, true);
switch (rc) {
case 0:
sksec->nlbl_state = NLBL_LABELED;
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 146667937811..efeac8365ad0 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -2565,7 +2565,8 @@ static int smack_netlbl_add(struct sock *sk)
local_bh_disable();
bh_lock_sock_nested(sk);
- rc = netlbl_sock_setattr(sk, sk->sk_family, &skp->smk_netlabel);
+ rc = netlbl_sock_setattr(sk, sk->sk_family, &skp->smk_netlabel,
+ netlbl_sk_lock_check(sk));
switch (rc) {
case 0:
ssp->smk_state = SMK_NETLBL_LABELED;
generated by cgit v1.2.3 (git 2.39.0) at 2024-06-26 21:52:06 +0300