1 files changed, 3 insertions, 2 deletions

diff --git a/mm/kasan/kasan.c b/mm/kasan/kasan.c
index f185455b3406..c3bd5209da38 100644
--- a/mm/kasan/kasan.c
+++ b/mm/kasan/kasan.c
@@ -619,12 +619,13 @@ void kasan_kfree_large(void *ptr, unsigned long ip)
 int kasan_module_alloc(void *addr, size_t size)
 {
         void *ret;
+        size_t scaled_size;
         size_t shadow_size;
         unsigned long shadow_start;
 
         shadow_start = (unsigned long)kasan_mem_to_shadow(addr);
-        shadow_size = round_up(size >> KASAN_SHADOW_SCALE_SHIFT,
-                        PAGE_SIZE);
+        scaled_size = (size + KASAN_SHADOW_MASK) >> KASAN_SHADOW_SCALE_SHIFT;
+        shadow_size = round_up(scaled_size, PAGE_SIZE);
 
         if (WARN_ON(!PAGE_ALIGNED(shadow_start)))
                 return -EINVAL;