Merge tag 'for-linus-5.1a-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git...

[sfrench/cifs-2.6.git] / mm / memory_hotplug.c

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 6b05576fb4ec10ebc9d1c75ec461d54b349db306..cd23c081924deed7774f98407748becf817c21b0 100644 (file)
--- 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);