Make sure we resize the payload to the amount of read bytes.

Change-Id: I33f032182912b4f03d073258c91974518db327fd
(cherry picked from commit 66053621bd859f19ee8fa522f0be85860ac4487d)

1 files changed, 1 insertions, 0 deletions

diff --git a/loolwsd/IoUtil.cpp b/loolwsd/IoUtil.cpp
index 90483ac82..085422d91 100644
--- a/loolwsd/IoUtil.cpp
+++ b/loolwsd/IoUtil.cpp
@@ -155,6 +155,7 @@ void SocketProcessor(const std::shared_ptr<WebSocket>& ws,
                     payload.resize(size);
 
                     n = ws->receiveFrame(payload.data(), size, flags);
+                    payload.resize(n > 0 ? n : 0);
                 }
             }