4 files changed, 23 insertions, 6 deletions
diff --git a/src/sys/include/os/ns.h b/src/sys/include/os/ns.h
index 87f18bf..73de677 100644
--- a/src/sys/include/os/ns.h
+++ b/src/sys/include/os/ns.h
@@ -33,6 +33,11 @@
 #include <sys/types.h>
 #include <os/nsvar.h>
 
+#define NSMAX 8     /* Max number of namespaces */
+
+/* Namespace lists */
+#define NS_IOTAP 0      /* I/O tap interface */
+
 typedef uint8_t ns_t;
 
 /*
diff --git a/src/sys/include/sys/fbdev.h b/src/sys/include/sys/fbdev.h
index b0f3fb1..2acddbf 100644
--- a/src/sys/include/sys/fbdev.h
+++ b/src/sys/include/sys/fbdev.h
@@ -35,7 +35,7 @@
 #include <stdint.h>
 #endif  /* !_KERNEL */
 
-#define FBDEV_NSO "system:video:attr"
+#define FBDEV_NSO "video:attr"
 
 struct fb_info {
     uint32_t width;
diff --git a/src/sys/io/video/fbdev.c b/src/sys/io/video/fbdev.c
index 9ebad7a..ce8c073 100644
--- a/src/sys/io/video/fbdev.c
+++ b/src/sys/io/video/fbdev.c
@@ -126,7 +126,7 @@ fbdev_init(struct module *modp)
     }
 
     obj->data = &info;
-    return ns_obj_enter(0, obj, FBDEV_NSO);
+    return ns_obj_enter(NS_IOTAP, obj, FBDEV_NSO);
 }
 
 static struct mac_ops ops = {
diff --git a/src/sys/os/os_ns.c b/src/sys/os/os_ns.c
index e449eb5..5259acc 100644
--- a/src/sys/os/os_ns.c
+++ b/src/sys/os/os_ns.c
@@ -55,7 +55,7 @@ struct ns_hashmap {
 };
 
 /* Global namespace */
-static struct ns_hashmap namespace;
+static struct ns_hashmap namespace[NSMAX];
 
 /*
  * Fowler–Noll–Vo hash function
@@ -131,12 +131,17 @@ ns_obj_enter(ns_t ns, void *obj, const char *name)
         return -EINVAL;
     }
 
+    /* Don't overflow */
+    if (ns >= NSMAX) {
+        return -EINVAL;
+    }
+
     /* Get the index */
     hash = fnv1_hash(name);
     key = hash % NS_HM_ENTRIES;
 
     /* Find a free slot */
-    hm = &namespace;
+    hm = &namespace[ns];
     while (hm != NULL) {
         entry = &hm->entries[key];
 
@@ -168,11 +173,16 @@ ns_obj_lookup(ns_t ns, const char *name, void *res_p)
         return -EINVAL;
     }
 
+    /* Don't overflow */
+    if (ns >= NSMAX) {
+        return -EINVAL;
+    }
+
     /* Get the index */
     hash = fnv1_hash(name);
     key = hash % NS_HM_ENTRIES;
 
-    hm = &namespace;
+    hm = &namespace[ns];
     while (hm != NULL) {
         entry = &hm->entries[key];
         if (entry->name == NULL) {
@@ -202,6 +212,8 @@ ns_obj_lookup(ns_t ns, const char *name, void *res_p)
 int
 ns_init(void)
 {
-    memset(&namespace, 0, sizeof(namespace));
+    for (uint8_t i = 0; i < NSMAX; ++i) {
+        memset(&namespace[i], 0, sizeof(namespace[0]));
+    }
     return 0;
 }