Fixed memory poisoning in slab (923a6644) · Commits · 戴 / Bird

lib/slab.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -269,6 +269,9 @@ no_partial:
		goto okay;
		}
		h = alloc_page();
		#ifdef POISON
		memset(h, 0xba, get_page_size());
		#endif
		ASSERT_DIE(SL_GET_HEAD(h) == h);
		memset(h, 0, s->head_size);
		add_head(&s->partial_heads, &h->n);
		@@ -324,7 +327,12 @@ sl_free(slab s, void oo)
		{
		rem_node(&h->n);
		if (s->num_empty_heads >= MAX_EMPTY_HEADS)
		{
		#ifdef POISON
		memset(h, 0xde, get_page_size());
		#endif
		free_page(h);
		}
		else
		{
		add_head(&s->empty_heads, &h->n);