From d4f2d97841827cb876da8b607df05a3dab812416 Mon Sep 17 00:00:00 2001
From: Paul Moore <paul.moore@hp.com>
Date: Thu, 22 Apr 2010 14:46:18 -0400
Subject: [PATCH] selinux: Consolidate sockcreate_sid logic
Consolidate the basic sockcreate_sid logic into a single helper function
which allows us to do some cleanups in the related code.
Signed-off-by: Paul Moore <paul.moore@hp.com>
Acked-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
---
security/selinux/hooks.c | 32 ++++++++++++--------------------
1 file changed, 12 insertions(+), 20 deletions(-)
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 190fd0ffb13e..2d94a406574e 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -3671,6 +3671,12 @@ static int selinux_skb_peerlbl_sid(struct sk_buff *skb, u16 family, u32 *sid)
}
/* socket security operations */
+
+static u32 socket_sockcreate_sid(const struct task_security_struct *tsec)
+{
+ return tsec->sockcreate_sid ? : tsec->sid;
+}
+
static int socket_has_perm(struct task_struct *task, struct socket *sock,
u32 perms)
{
@@ -3698,21 +3704,15 @@ static int selinux_socket_create(int family, int type,
{
const struct cred *cred = current_cred();
const struct task_security_struct *tsec = cred->security;
- u32 sid, newsid;
+ u32 newsid;
u16 secclass;
- int err = 0;
if (kern)
- goto out;
-
- sid = tsec->sid;
- newsid = tsec->sockcreate_sid ?: sid;
+ return 0;
+ newsid = socket_sockcreate_sid(tsec);
secclass = socket_type_to_security_class(family, type, protocol);
- err = avc_has_perm(sid, newsid, secclass, SOCKET__CREATE, NULL);
-
-out:
- return err;
+ return avc_has_perm(tsec->sid, newsid, secclass, SOCKET__CREATE, NULL);
}
static int selinux_socket_post_create(struct socket *sock, int family,
@@ -3720,22 +3720,14 @@ static int selinux_socket_post_create(struct socket *sock, int family,
{
const struct cred *cred = current_cred();
const struct task_security_struct *tsec = cred->security;
- struct inode_security_struct *isec;
+ struct inode_security_struct *isec = SOCK_INODE(sock)->i_security;
struct sk_security_struct *sksec;
- u32 sid, newsid;
int err = 0;
- sid = tsec->sid;
- newsid = tsec->sockcreate_sid;
-
- isec = SOCK_INODE(sock)->i_security;
-
if (kern)
isec->sid = SECINITSID_KERNEL;
- else if (newsid)
- isec->sid = newsid;
else
- isec->sid = sid;
+ isec->sid = socket_sockcreate_sid(tsec);
isec->sclass = socket_type_to_security_class(family, type, protocol);
isec->initialized = 1;
--
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