From 550cca719274540ffde1a63cc8046189af5ad54b Mon Sep 17 00:00:00 2001
From: Lei Jin <lei@fb.com>
Date: Fri, 28 Mar 2014 17:30:20 -0700
Subject: [PATCH] dynamicbloom fix: don't offset address when it is already
 aligned

Summary: this causes overflow and asan failure

Test Plan: make asan_check

Reviewers: igor

Reviewed By: igor

CC: leveldb

Differential Revision: https://reviews.facebook.net/D17301
---
 util/dynamic_bloom.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/util/dynamic_bloom.cc b/util/dynamic_bloom.cc
index 5d3d30f4ef..a4c8e11cb1 100644
--- a/util/dynamic_bloom.cc
+++ b/util/dynamic_bloom.cc
@@ -39,7 +39,7 @@ DynamicBloom::DynamicBloom(uint32_t total_bits,
     sz += CACHE_LINE_SIZE - 1;
   }
   raw_ = new unsigned char[sz]();
-  if (kBlocked) {
+  if (kBlocked && (reinterpret_cast<uint64_t>(raw_) % CACHE_LINE_SIZE)) {
     data_ = raw_ + CACHE_LINE_SIZE -
       reinterpret_cast<uint64_t>(raw_) % CACHE_LINE_SIZE;
   } else {