1 files changed, 6 insertions, 0 deletions

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 124e794867c5..519f9db063ff 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -96,10 +96,16 @@ void mem_hotplug_done(void)
         cpus_read_unlock();
 }
 
+u64 max_mem_size = U64_MAX;
+
 /* add this memory to iomem resource */
 static struct resource *register_memory_resource(u64 start, u64 size)
 {
         struct resource *res, *conflict;
+
+        if (start + size > max_mem_size)
+                return ERR_PTR(-E2BIG);
+
         res = kzalloc(sizeof(struct resource), GFP_KERNEL);
         if (!res)
                 return ERR_PTR(-ENOMEM);