check ReadCallback before using it

[folly.git] / folly / io / async / AsyncSSLSocket.cpp

diff --git a/folly/io/async/AsyncSSLSocket.cpp b/folly/io/async/AsyncSSLSocket.cpp
index 9c59cce72272aa02b862821c465e99362d89f269..e3df3950007603e237f7db3c0ef945538dc739bd 100644 (file)
--- a/folly/io/async/AsyncSSLSocket.cpp
+++ b/folly/io/async/AsyncSSLSocket.cpp
@@ -1073,7 +1073,7 @@ AsyncSSLSocket::handleConnect() noexcept {
 void AsyncSSLSocket::setReadCB(ReadCallback *callback) {
 #ifdef SSL_MODE_MOVE_BUFFER_OWNERSHIP
   // turn on the buffer movable in openssl
-  if (!isBufferMovable_ && readCallback_->isBufferMovable()) {
+  if (!isBufferMovable_ && callback != nullptr && callback->isBufferMovable()) {
     SSL_set_mode(ssl_, SSL_get_mode(ssl_) | SSL_MODE_MOVE_BUFFER_OWNERSHIP);
     isBufferMovable_ = true;
   }