Fixed NULL pointer dereference.

diff --git a/winpr/libwinpr/file/file.c b/winpr/libwinpr/file/file.c
index 3beb052..d1680fe 100644 (file)
--- a/winpr/libwinpr/file/file.c
+++ b/winpr/libwinpr/file/file.c
@@ -484,7 +484,8 @@ BOOL ReadFile(HANDLE hFile, LPVOID lpBuffer, DWORD nNumberOfBytesToRead,
                                }
                        }
 
-                       *lpNumberOfBytesRead = io_status;
+                       if (lpNumberOfBytesRead)
+                               *lpNumberOfBytesRead = io_status;
                }
                else
                {