From: runsisi <runsisi@zte.com.cn>
Date: Mon, 12 Dec 2016 02:40:24 +0000 (+0800)
Subject: include/fs_types: fix unsigned integer overflow
X-Git-Tag: v12.0.0~77^2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=722a9a7f79a827fd55d1d657a95bc06add676f36;p=ceph.git

include/fs_types: fix unsigned integer overflow

stats image has (stripe_count * object_size) > UINT32_MAX results following exception:
  ...
  5: (()+0xc3391) [0x7f720e638391]
  6: (librbd::Image::stat(rbd_image_info_t&, unsigned long)+0x46) [0x7f720e5d1fd6]
  7: (rbd::action::info::execute(boost::program_options::variables_map const&)+0x194) [0x7f7218266744]
  8: (rbd::Shell::execute(std::vector<char const*, std::allocator<char const*> > const&)+0x87d) [0x7f721823c1bd]
  9: (main()+0x72) [0x7f721820b4c2]
  ...
  Floating point exception (core dumped)

Signed-off-by: runsisi <runsisi@zte.com.cn>
---

diff --git a/src/include/fs_types.h b/src/include/fs_types.h
index 3a76cc2e697..eee6d58a9a7 100644
--- a/src/include/fs_types.h
+++ b/src/include/fs_types.h
@@ -102,7 +102,7 @@ struct file_layout_t {
   }
 
   uint64_t get_period() const {
-    return stripe_count * object_size;
+    return static_cast<uint64_t>(stripe_count) * object_size;
   }
 
   void from_legacy(const ceph_file_layout& fl);