1 files changed, 66 insertions, 0 deletions

diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index a4efc966f065..2e73d3279f2d 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -38,6 +38,14 @@
 
 unsigned int selinux_checkreqprot = CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE;
 
+#ifdef CONFIG_SECURITY_SELINUX_ENABLE_SECMARK_DEFAULT
+#define SELINUX_COMPAT_NET_VALUE 0
+#else
+#define SELINUX_COMPAT_NET_VALUE 1
+#endif
+
+int selinux_compat_net = SELINUX_COMPAT_NET_VALUE;
+
 static int __init checkreqprot_setup(char *str)
 {
         selinux_checkreqprot = simple_strtoul(str,NULL,0) ? 1 : 0;
@@ -45,6 +53,13 @@ static int __init checkreqprot_setup(char *str)
 }
 __setup("checkreqprot=", checkreqprot_setup);
 
+static int __init selinux_compat_net_setup(char *str)
+{
+        selinux_compat_net = simple_strtoul(str,NULL,0) ? 1 : 0;
+        return 1;
+}
+__setup("selinux_compat_net=", selinux_compat_net_setup);
+
 
 static DEFINE_MUTEX(sel_mutex);
 
@@ -85,6 +100,7 @@ enum sel_inos {
         SEL_AVC,        /* AVC management directory */
         SEL_MEMBER,     /* compute polyinstantiation membership decision */
         SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */
+        SEL_COMPAT_NET, /* whether to use old compat network packet controls */
 };
 
 #define TMPBUFLEN       12
@@ -364,6 +380,55 @@ static struct file_operations sel_checkreqprot_ops = {
         .write          = sel_write_checkreqprot,
 };
 
+static ssize_t sel_read_compat_net(struct file *filp, char __user *buf,
+                                   size_t count, loff_t *ppos)
+{
+        char tmpbuf[TMPBUFLEN];
+        ssize_t length;
+
+        length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_compat_net);
+        return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
+}
+
+static ssize_t sel_write_compat_net(struct file * file, const char __user * buf,
+                                    size_t count, loff_t *ppos)
+{
+        char *page;
+        ssize_t length;
+        int new_value;
+
+        length = task_has_security(current, SECURITY__LOAD_POLICY);
+        if (length)
+                return length;
+
+        if (count >= PAGE_SIZE)
+                return -ENOMEM;
+        if (*ppos != 0) {
+                /* No partial writes. */
+                return -EINVAL;
+        }
+        page = (char*)get_zeroed_page(GFP_KERNEL);
+        if (!page)
+                return -ENOMEM;
+        length = -EFAULT;
+        if (copy_from_user(page, buf, count))
+                goto out;
+
+        length = -EINVAL;
+        if (sscanf(page, "%d", &new_value) != 1)
+                goto out;
+
+        selinux_compat_net = new_value ? 1 : 0;
+        length = count;
+out:
+        free_page((unsigned long) page);
+        return length;
+}
+static struct file_operations sel_compat_net_ops = {
+        .read           = sel_read_compat_net,
+        .write          = sel_write_compat_net,
+};
+
 /*
  * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c
  */
@@ -1219,6 +1284,7 @@ static int sel_fill_super(struct super_block * sb, void * data, int silent)
                 [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR},
                 [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO},
                 [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR},
+                [SEL_COMPAT_NET] = {"compat_net", &sel_compat_net_ops, S_IRUGO|S_IWUSR},
                 /* last one */ {""}
         };
         ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files);