diff --git a/core/alloc.c b/core/alloc.c
index 4258a24..1448334 100644
--- a/core/alloc.c
+++ b/core/alloc.c
@@ -9,7 +9,7 @@
 
 // Slab will contains object from sizeof(void *) to PAGE_SIZE/2 by pow2
 #define SLUB_SIZE (PAGE_SHIFT - 1)
-struct slabDesc *slubArray[SLUB_SIZE];
+struct slabDesc *slub;
 
 int initSlabDesc(struct slabDesc **desc, size_t size);
 static int formatPage(struct slabDesc *desc, size_t size);
@@ -17,9 +17,12 @@ static int formatPage(struct slabDesc *desc, size_t size);
 int initSlab(void)
 {
         uint start = log2(sizeof(void *));
+        list_init(slub);
         for (uint i = start; i < SLUB_SIZE; i++) {
-                if (initSlabDesc(&slubArray[i - start], 1U << i))
+                struct slabDesc *slab;
+                if (initSlabDesc(&slab, 1U << i))
                         return ENOMEM;
+                list_add_tail(slub, slab);
         }
         return 0;
 }
@@ -75,23 +78,26 @@ void *malloc(size_t size)
                 printf("implement malloc for big size\n");
                 return NULL;
         }
+        struct slabDesc *slubEntry;
         uint slubIdx = 0;
-        while (size > slubArray[slubIdx]->size) {
-                slubIdx++;
+        list_foreach(slub, slubEntry, slubIdx)
+        {
+                if(size <= slubEntry->size)
+                        break;
         }
         struct slabDesc *slab;
         int slabIdx;
-        list_foreach(slubArray[slubIdx], slab, slabIdx)
+        list_foreach(slubEntry, slab, slabIdx)
         {
                 if (!slab->full) {
                         pr_devel("found place in slub %d at idx %d \n", slubIdx, slabIdx);
                         return allocFromSlab(slab);
                 }
         }
-        if (!list_foreach_early_break(slubArray[slubIdx], slab, slabIdx)) {
+        if (!list_foreach_early_break(slubEntry, slab, slabIdx)) {
                 struct slabDesc *newSlab;
                 initSlabDesc(&newSlab, slab->size);
-                list_add_head(slubArray[slubIdx], newSlab);
+                list_add_head(slubEntry, newSlab);
                 return allocFromSlab(newSlab);
         }
         return NULL;