From: bfis <b.fis@cern.ch>
Date: Tue, 24 Aug 2021 10:43:19 +0000 (+0200)
Subject: Avoid 2GB write limitation on SSLIOStream
X-Git-Tag: v6.2.0b1~39^2~1
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3bd666cb4739939285645dd58afb10229d3f3337;p=thirdparty%2Ftornado.git

Avoid 2GB write limitation on SSLIOStream
---

diff --git a/tornado/iostream.py b/tornado/iostream.py
index 86235f4dc..e0ec51334 100644
--- a/tornado/iostream.py
+++ b/tornado/iostream.py
@@ -1566,6 +1566,11 @@ class SSLIOStream(IOStream):
         return future
 
     def write_to_fd(self, data: memoryview) -> int:
+        # clip buffer size at 1GB since SSL sockets only support upto 2GB
+        # this change in behaviour is transparent, since the function is
+        # already expected to (possibly) read less than the provided buffer
+        if len(data) >> 30:
+            data = memoryview(data)[: 1 << 30]
         try:
             return self.socket.send(data)  # type: ignore
         except ssl.SSLError as e: