1 files changed, 1 insertions, 1 deletions

diff --git a/mm/slob.c b/mm/slob.c
index 4c82dd41f32e..62b679dc660f 100644
--- a/mm/slob.c
+++ b/mm/slob.c
@@ -515,7 +515,7 @@ size_t ksize(const void *block)
 
         sp = (struct slob_page *)virt_to_page(block);
         if (slob_page(sp))
-                return ((slob_t *)block - 1)->units + SLOB_UNIT;
+                return (((slob_t *)block - 1)->units - 1) * SLOB_UNIT;
         else
                 return sp->page.private;
 }