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
11 years ago · 550cca7192
parent 43a593a6d9
commit 550cca7192
1 changed files with 1 additions and 1 deletions
--- 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 {