[ovs-dev] [PATCH 5/6] python: Fix a double encoding attempt on an Unicode string

Jakub Sitnicki jkbs at redhat.com
Wed Apr 18 16:01:14 UTC 2018

Encoding from 'unicode' to 'str' that has been added to the Stream class
in commit 2254074e3067 ("python: fix python3 encode/decode on Windows")
conflicts with SSLStream which already contains a quirk for pyopenssl
that does the same thing.

This results in a double encoding attempt when SSL is used and we crash
and burn due to:

Traceback (most recent call last):
  File "../.././test-ovsdb.py", line 874, in <module>
  File "../.././test-ovsdb.py", line 869, in main
  File "../.././test-ovsdb.py", line 655, in do_idl
    idl_set(idl, command, step)
  File "../.././test-ovsdb.py", line 526, in idl_set
    status = txn.commit_block()
  File "/home/jkbs/src/ovs/python/ovs/db/idl.py", line 1405, in commit_block
    status = self.commit()
  File "/home/jkbs/src/ovs/python/ovs/db/idl.py", line 1388, in commit
    if not self.idl._session.send(msg):
  File "/home/jkbs/src/ovs/python/ovs/jsonrpc.py", line 540, in send
    return self.rpc.send(msg)
  File "/home/jkbs/src/ovs/python/ovs/jsonrpc.py", line 244, in send
  File "/home/jkbs/src/ovs/python/ovs/jsonrpc.py", line 203, in run
    retval = self.stream.send(self.output)
  File "/home/jkbs/src/ovs/python/ovs/stream.py", line 808, in send
    return super(SSLStream, self).send(buf)
  File "/home/jkbs/src/ovs/python/ovs/stream.py", line 391, in send
    buf = buf.encode('utf-8')
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc2 in position 83: ordinal not in range(128)

Remove the quirk from SSLStream as the base class now does encoding.

Reported-by: Marcin Mirecki <mmirecki at redhat.com>
Signed-off-by: Jakub Sitnicki <jkbs at redhat.com>
 python/ovs/stream.py | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/python/ovs/stream.py b/python/ovs/stream.py
index c8b96b073..7b15bcd7d 100644
--- a/python/ovs/stream.py
+++ b/python/ovs/stream.py
@@ -801,10 +801,6 @@ class SSLStream(Stream):

     def send(self, buf):
-            if isinstance(buf, six.text_type):
-                # Convert to byte stream if the buffer is string type/unicode.
-                # pyopenssl version 0.14 expects the buffer to be byte string.
-                buf = buf.encode('utf-8')
             return super(SSLStream, self).send(buf)
         except SSL.WantWriteError:
             return -errno.EAGAIN

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