x86/numa: Add constraints check for nid parameters

[deliverable/linux.git] / arch / x86 / mm / numa.c

diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index fbeaaf416610d29ef824db47bd6a3f19756de188..cdc00543d375db6bf1f431c8580759414e8157ef 100644 (file)
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -430,8 +430,9 @@ static int __init numa_alloc_distance(void)
  * calls are ignored until the distance table is reset with
  * numa_reset_distance().
  *
- * If @from or @to is higher than the highest known node at the time of
- * table creation or @distance doesn't make sense, the call is ignored.
+ * If @from or @to is higher than the highest known node or lower than zero
+ * at the time of table creation or @distance doesn't make sense, the call
+ * is ignored.
  * This is to allow simplification of specific NUMA config implementations.
  */
 void __init numa_set_distance(int from, int to, int distance)
@@ -439,8 +440,9 @@ void __init numa_set_distance(int from, int to, int distance)
        if (!numa_distance && numa_alloc_distance() < 0)
                return;
 
-       if (from >= numa_distance_cnt || to >= numa_distance_cnt) {
-               printk_once(KERN_DEBUG "NUMA: Debug: distance out of bound, from=%d to=%d distance=%d\n",
+       if (from >= numa_distance_cnt || to >= numa_distance_cnt ||
+                       from < 0 || to < 0) {
+               pr_warn_once("NUMA: Warning: node ids are out of bound, from=%d to=%d distance=%d\n",
                            from, to, distance);
                return;
        }