os/MemStore: fix use-after-free on iterator

Signed-off-by: Sage Weil <sage@redhat.com>

diff --git a/src/os/MemStore.cc b/src/os/MemStore.cc
index 9033ad0985bbdcff3496ddada6402dea4ca00431..fd791703997da399781cebdd1e4cead0766bdde5 100644 (file)
--- a/src/os/MemStore.cc
+++ b/src/os/MemStore.cc
@@ -1024,9 +1024,9 @@ int MemStore::_remove(coll_t cid, const ghobject_t& oid)
   auto i = c->object_hash.find(oid);
   if (i == c->object_hash.end())
     return -ENOENT;
+  used_bytes -= i->second->get_size();
   c->object_hash.erase(i);
   c->object_map.erase(oid);
-  used_bytes -= i->second->get_size();
 
   return 0;
 }