librbd: init m_req in LibrbdWriteback::C_Read ctor

CID 717225: Uninitialized pointer field (UNINIT_CTOR)
At (2): Non-static class member "m_req" is not initialized in this
constructor nor in any functions that it calls.

Signed-off-by: Josh Durgin <josh.durgin@inktank.com>

diff --git a/src/librbd/LibrbdWriteback.cc b/src/librbd/LibrbdWriteback.cc
index d675f568fc4bb5f92668774e0ae3ab2b1922e6e5..b420441abcf96b2e799978e8718dfd2be653bb63 100644 (file)
--- a/src/librbd/LibrbdWriteback.cc
+++ b/src/librbd/LibrbdWriteback.cc
@@ -46,7 +46,7 @@ namespace librbd {
   class C_Read : public Context {
   public:
     C_Read(Context *real_context, bufferlist *pbl)
-      : m_ctx(real_context), m_out_bl(pbl) {}
+      : m_ctx(real_context), m_req(NULL), m_out_bl(pbl) {}
     virtual ~C_Read() {}
     virtual void finish(int r) {
       if (r >= 0)