[PATCH] Missing checks in sis drm

drivers/char/drm/sis_ds.c

@@ -50,15 +50,16 @@ set_t *setInit(void)
   set_t *set;
 
   set = (set_t *)MALLOC(sizeof(set_t));
-  for(i = 0; i < SET_SIZE; i++){
-    set->list[i].free_next = i+1;    
-    set->list[i].alloc_next = -1;
-  }    
-  set->list[SET_SIZE-1].free_next = -1;
-  set->free = 0;
-  set->alloc = -1;
-  set->trace = -1;
-  
+  if (set) {
+    for(i = 0; i < SET_SIZE; i++){
+      set->list[i].free_next = i+1;    
+      set->list[i].alloc_next = -1;
+    }    
+    set->list[SET_SIZE-1].free_next = -1;
+    set->free = 0;
+    set->alloc = -1;
+    set->trace = -1;
+  }  
   return set;
 }
 
@@ -172,7 +173,8 @@ static void *calloc(size_t nmemb, size_t size)
 {
   void *addr;
   addr = kmalloc(nmemb*size, GFP_KERNEL);
-  memset(addr, 0, nmemb*size);
+  if (addr)
+    memset(addr, 0, nmemb*size);
   return addr;
 }
 #define free(n) kfree(n)