From mboxrd@z Thu Jan 1 00:00:00 1970 From: paul.moore@hp.com Subject: [PATCH 05/13] NetLabel: check for a CIPSOv4 option before we do call into the CIPSOv4 layer Date: Fri, 17 Nov 2006 17:38:47 -0500 Message-ID: <20061117224333.829365000@hp.com> References: <20061117223842.399078000@hp.com> Cc: jmorris@namei.org, Paul Moore Return-path: Received: from atlrel8.hp.com ([156.153.255.206]:9389 "EHLO atlrel8.hp.com") by vger.kernel.org with ESMTP id S1755988AbWKQWnf (ORCPT ); Fri, 17 Nov 2006 17:43:35 -0500 To: netdev@vger.kernel.org, selinux@tycho.nsa.gov Content-Disposition: inline; filename=netlabel-cipso_earlycheck Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org From: Paul Moore Right now the NetLabel code always jumps into the CIPSOv4 layer to determine if a CIPSO IP option is present. However, we can do this check directly in the NetLabel code by making use of the CIPSO_V4_OPTEXIST() macro which should save us a function call in the common case of not having a CIPSOv4 option present. Signed-off-by: Paul Moore --- net/ipv4/cipso_ipv4.c | 2 -- net/netlabel/netlabel_kapi.c | 6 ++---- 2 files changed, 2 insertions(+), 6 deletions(-) Index: net-2.6.20_netlabel-base-work/net/ipv4/cipso_ipv4.c =================================================================== --- net-2.6.20_netlabel-base-work.orig/net/ipv4/cipso_ipv4.c +++ net-2.6.20_netlabel-base-work/net/ipv4/cipso_ipv4.c @@ -1436,8 +1436,6 @@ int cipso_v4_skbuff_getattr(const struct u32 doi; struct cipso_v4_doi *doi_def; - if (!CIPSO_V4_OPTEXIST(skb)) - return -ENOMSG; cipso_ptr = CIPSO_V4_OPTPTR(skb); if (cipso_v4_cache_check(cipso_ptr, cipso_ptr[1], secattr) == 0) return 0; Index: net-2.6.20_netlabel-base-work/net/netlabel/netlabel_kapi.c =================================================================== --- net-2.6.20_netlabel-base-work.orig/net/netlabel/netlabel_kapi.c +++ net-2.6.20_netlabel-base-work/net/netlabel/netlabel_kapi.c @@ -149,10 +149,8 @@ int netlbl_socket_getattr(const struct s int netlbl_skbuff_getattr(const struct sk_buff *skb, struct netlbl_lsm_secattr *secattr) { - int ret_val; - - ret_val = cipso_v4_skbuff_getattr(skb, secattr); - if (ret_val == 0) + if (CIPSO_V4_OPTEXIST(skb) && + cipso_v4_skbuff_getattr(skb, secattr) == 0) return 0; return netlbl_unlabel_getattr(secattr); -- paul moore linux security @ hp