We were doing a lot of extra work in selinux_netlbl_sock_graft() what wasn't
necessary so this patch removes that code. It also removes the redundant
second argument to selinux_netlbl_sock_setsid() which allows us to simplify a
few other functions.
Signed-off-by: Paul Moore <paul.moore@xxxxxx>
Acked-by: James Morris <jmorris@xxxxxxxxx>
---
security/selinux/netlabel.c | 38 ++++++++++----------------------------
1 files changed, 10 insertions(+), 28 deletions(-)
diff --git a/security/selinux/netlabel.c b/security/selinux/netlabel.c
index 89b4183..b9ce5fc 100644
--- a/security/selinux/netlabel.c
+++ b/security/selinux/netlabel.c
@@ -66,22 +66,24 @@ static int selinux_netlbl_sidlookup_cached(struct sk_buff *skb,
/**
* selinux_netlbl_sock_setsid - Label a socket using the NetLabel mechanism
* @sk: the socket to label
- * @sid: the SID to use
*
* Description:
- * Attempt to label a socket using the NetLabel mechanism using the given
- * SID. Returns zero values on success, negative values on failure.
+ * Attempt to label a socket using the NetLabel mechanism. Returns zero values
+ * on success, negative values on failure.
*
*/
-static int selinux_netlbl_sock_setsid(struct sock *sk, u32 sid)
+static int selinux_netlbl_sock_setsid(struct sock *sk)
{
int rc;
struct sk_security_struct *sksec = sk->sk_security;
struct netlbl_lsm_secattr secattr;
+ if (sksec->nlbl_state != NLBL_REQUIRE)
+ return 0;
+
netlbl_secattr_init(&secattr);
- rc = security_netlbl_sid_to_secattr(sid, &secattr);
+ rc = security_netlbl_sid_to_secattr(sksec->sid, &secattr);
if (rc != 0)
goto sock_setsid_return;
rc = netlbl_sock_setattr(sk, &secattr);
@@ -174,24 +176,10 @@ int selinux_netlbl_skbuff_getsid(struct sk_buff *skb,
*/
void selinux_netlbl_sock_graft(struct sock *sk, struct socket *sock)
{
- struct sk_security_struct *sksec = sk->sk_security;
- struct netlbl_lsm_secattr secattr;
- u32 nlbl_peer_sid;
-
- if (sksec->nlbl_state != NLBL_REQUIRE)
- return;
-
- netlbl_secattr_init(&secattr);
- if (netlbl_sock_getattr(sk, &secattr) == 0 &&
- secattr.flags != NETLBL_SECATTR_NONE &&
- security_netlbl_secattr_to_sid(&secattr, &nlbl_peer_sid) == 0)
- sksec->peer_sid = nlbl_peer_sid;
- netlbl_secattr_destroy(&secattr);
-
/* Try to set the NetLabel on the socket to save time later, if we fail
* here we will pick up the pieces in later calls to
* selinux_netlbl_inode_permission(). */
- selinux_netlbl_sock_setsid(sk, sksec->sid);
+ selinux_netlbl_sock_setsid(sk);
}
/**
@@ -205,13 +193,7 @@ void selinux_netlbl_sock_graft(struct sock *sk, struct socket *sock)
*/
int selinux_netlbl_socket_post_create(struct socket *sock)
{
- struct sock *sk = sock->sk;
- struct sk_security_struct *sksec = sk->sk_security;
-
- if (sksec->nlbl_state != NLBL_REQUIRE)
- return 0;
-
- return selinux_netlbl_sock_setsid(sk, sksec->sid);
+ return selinux_netlbl_sock_setsid(sock->sk);
}
/**
@@ -246,7 +228,7 @@ int selinux_netlbl_inode_permission(struct inode *inode, int mask)
local_bh_disable();
bh_lock_sock_nested(sk);
if (likely(sksec->nlbl_state == NLBL_REQUIRE))
- rc = selinux_netlbl_sock_setsid(sk, sksec->sid);
+ rc = selinux_netlbl_sock_setsid(sk);
else
rc = 0;
bh_unlock_sock(sk);
--
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