Examples: hello_world.cc, content displayed after read is not null terminated.

Copy contents of bufferlist to a string before sending to stdout since a
bufferlist is not null terminated.

Fixes: #7822
Signed-off-by: Brad Hubbard <bhubbard@redhat.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/examples/librados/hello_world.cc b/examples/librados/hello_world.cc
index cb5476ffc84..9d3713495a3 100644
--- a/examples/librados/hello_world.cc
+++ b/examples/librados/hello_world.cc
@@ -173,7 +173,9 @@ int main(int argc, const char **argv)
     } else {
       std::cout << "we read our object " << object_name
 	  << ", and got back " << ret << " bytes with contents\n"
-	  << read_buf.c_str() << std::endl;
+      std::string read_string;
+      read_buf.copy(0, ret, read_string);
+      std::cout << read_string << std::endl;
     }
   }