1 files changed, 48 insertions, 5 deletions

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 65fb5e8ea941..b1ac22d23195 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -181,11 +181,10 @@ static int inode_alloc_security(struct inode *inode)
 	struct task_security_struct *tsec = current->security;
 	struct inode_security_struct *isec;
 
-	isec = kmem_cache_alloc(sel_inode_cache, GFP_KERNEL);
+	isec = kmem_cache_zalloc(sel_inode_cache, GFP_KERNEL);
 	if (!isec)
 		return -ENOMEM;
 
-	memset(isec, 0, sizeof(*isec));
 	mutex_init(&isec->lock);
 	INIT_LIST_HEAD(&isec->list);
 	isec->inode = inode;
@@ -1078,6 +1077,9 @@ static int inode_has_perm(struct task_struct *tsk,
 	struct inode_security_struct *isec;
 	struct avc_audit_data ad;
 
+	if (unlikely (IS_PRIVATE (inode)))
+		return 0;
+
 	tsec = tsk->security;
 	isec = inode->i_security;
 
@@ -1424,6 +1426,47 @@ static int selinux_capable(struct task_struct *tsk, int cap)
 	return task_has_capability(tsk,cap);
 }
 
+static int selinux_sysctl_get_sid(ctl_table *table, u16 tclass, u32 *sid)
+{
+	int buflen, rc;
+	char *buffer, *path, *end;
+
+	rc = -ENOMEM;
+	buffer = (char*)__get_free_page(GFP_KERNEL);
+	if (!buffer)
+		goto out;
+
+	buflen = PAGE_SIZE;
+	end = buffer+buflen;
+	*--end = '\0';
+	buflen--;
+	path = end-1;
+	*path = '/';
+	while (table) {
+		const char *name = table->procname;
+		size_t namelen = strlen(name);
+		buflen -= namelen + 1;
+		if (buflen < 0)
+			goto out_free;
+		end -= namelen;
+		memcpy(end, name, namelen);
+		*--end = '/';
+		path = end;
+		table = table->parent;
+	}
+	buflen -= 4;
+	if (buflen < 0)
+		goto out_free;
+	end -= 4;
+	memcpy(end, "/sys", 4);
+	path = end;
+	rc = security_genfs_sid("proc", path, tclass, sid);
+out_free:
+	free_page((unsigned long)buffer);
+out:
+	return rc;
+}
+
 static int selinux_sysctl(ctl_table *table, int op)
 {
 	int error = 0;
@@ -1438,8 +1481,8 @@ static int selinux_sysctl(ctl_table *table, int op)
 
 	tsec = current->security;
 
-	rc = selinux_proc_get_sid(table->de, (op == 001) ?
-	                          SECCLASS_DIR : SECCLASS_FILE, &tsid);
+	rc = selinux_sysctl_get_sid(table, (op == 0001) ?
+				    SECCLASS_DIR : SECCLASS_FILE, &tsid);
 	if (rc) {
 		/* Default to the well-defined sysctl SID. */
 		tsid = SECINITSID_SYSCTL;
@@ -2655,7 +2698,7 @@ static int selinux_file_send_sigiotask(struct task_struct *tsk,
 	struct file_security_struct *fsec;
 
 	/* struct fown_struct is never outside the context of a struct file */
-        file = (struct file *)((long)fown - offsetof(struct file,f_owner));
+        file = container_of(fown, struct file, f_owner);
 
 	tsec = tsk->security;
 	fsec = file->f_security;