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selinux: [RFC PATCH v6 01/16] selinux: Cleanup the NetLabel glue

[RFC PATCH v6 01/16] selinux: Cleanup the NetLabel glue code

From: Paul Moore <paul.moore_at_nospam>
Date: Tue Sep 16 2008 - 12:55:54 GMT
To: selinux@tycho.nsa.gov, linux-security-module@vger.kernel.org, netdev@vger.kernel.org


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@hp.com> --- 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); -- To unsubscribe from this list: send the line "unsubscribe linux-security-module" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html