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Fix PySSL_SetError handling SSL_ERROR_SYSCALL

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This fixes random flakiness of test_ssl on stressed machines

Resolves: RHEL-88897
This commit is contained in:
Charalampos Stratakis 2025-05-10 01:17:10 +02:00
parent 42ad983c1e
commit 80b127bb9c
2 changed files with 215 additions and 1 deletions
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196
00462-fix-pyssl_seterror-handling-ssl_error_syscall.patch Normal file
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@ -0,0 +1,196 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: yevgeny hong <hongyevgeny@gmail.com>
Date: Tue, 26 Mar 2024 16:45:43 +0900
Subject: 00462: Fix PySSL_SetError handling SSL_ERROR_SYSCALL
Python 3.10 changed from using SSL_write() and SSL_read() to SSL_write_ex() and
SSL_read_ex(), but did not update handling of the return value.
Change error handling so that the return value is not examined.
OSError (not EOF) is now returned when retval is 0.
This resolves the issue of failing tests when a system is
stressed on OpenSSL 3.5.
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
Co-authored-by: Petr Viktorin <encukou@gmail.com>
---
Lib/test/test_ssl.py | 28 ++++++-----
...-02-18-09-50-31.gh-issue-115627.HGchj0.rst | 2 +
Modules/_ssl.c | 48 +++++++------------
3 files changed, 35 insertions(+), 43 deletions(-)
create mode 100644 Misc/NEWS.d/next/Library/2024-02-18-09-50-31.gh-issue-115627.HGchj0.rst
diff --git a/Lib/test/test_ssl.py b/Lib/test/test_ssl.py
index b13e37d0cd..daeb8cba74 100644
--- a/Lib/test/test_ssl.py
+++ b/Lib/test/test_ssl.py
@@ -2427,16 +2427,18 @@ def run(self):
self.write(msg.lower())
except OSError as e:
# handles SSLError and socket errors
+ if isinstance(e, ConnectionError):
+ # OpenSSL 1.1.1 sometimes raises
+ # ConnectionResetError when connection is not
+ # shut down gracefully.
+ if self.server.chatty and support.verbose:
+ print(f" Connection reset by peer: {self.addr}")
+
+ self.close()
+ self.running = False
+ return
if self.server.chatty and support.verbose:
- if isinstance(e, ConnectionError):
- # OpenSSL 1.1.1 sometimes raises
- # ConnectionResetError when connection is not
- # shut down gracefully.
- print(
- f" Connection reset by peer: {self.addr}"
- )
- else:
- handle_error("Test server failure:\n")
+ handle_error("Test server failure:\n")
try:
self.write(b"ERROR\n")
except OSError:
@@ -3148,8 +3150,8 @@ def test_wrong_cert_tls13(self):
suppress_ragged_eofs=False) as s:
s.connect((HOST, server.port))
with self.assertRaisesRegex(
- ssl.SSLError,
- 'alert unknown ca|EOF occurred|TLSV1_ALERT_UNKNOWN_CA'
+ OSError,
+ 'alert unknown ca|EOF occurred|TLSV1_ALERT_UNKNOWN_CA|closed by the remote host|Connection reset by peer'
):
# TLS 1.3 perform client cert exchange after handshake
s.write(b'data')
@@ -4422,8 +4424,8 @@ def msg_cb(conn, direction, version, content_type, msg_type, data):
# test sometimes fails with EOF error. Test passes as long as
# server aborts connection with an error.
with self.assertRaisesRegex(
- ssl.SSLError,
- '(certificate required|EOF occurred)'
+ OSError,
+ 'certificate required|EOF occurred|closed by the remote host|Connection reset by peer'
):
# receive CertificateRequest
data = s.recv(1024)
diff --git a/Misc/NEWS.d/next/Library/2024-02-18-09-50-31.gh-issue-115627.HGchj0.rst b/Misc/NEWS.d/next/Library/2024-02-18-09-50-31.gh-issue-115627.HGchj0.rst
new file mode 100644
index 0000000000..75d926ab59
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2024-02-18-09-50-31.gh-issue-115627.HGchj0.rst
@@ -0,0 +1,2 @@
+Fix the :mod:`ssl` module error handling of connection terminate by peer.
+It now throws an OSError with the appropriate error code instead of an EOFError.
diff --git a/Modules/_ssl.c b/Modules/_ssl.c
index 0b8cf0b6df..42a4c95890 100644
--- a/Modules/_ssl.c
+++ b/Modules/_ssl.c
@@ -573,7 +573,7 @@ PySSL_ChainExceptions(PySSLSocket *sslsock) {
}
static PyObject *
-PySSL_SetError(PySSLSocket *sslsock, int ret, const char *filename, int lineno)
+PySSL_SetError(PySSLSocket *sslsock, const char *filename, int lineno)
{
PyObject *type;
char *errstr = NULL;
@@ -586,7 +586,6 @@ PySSL_SetError(PySSLSocket *sslsock, int ret, const char *filename, int lineno)
_sslmodulestate *state = get_state_sock(sslsock);
type = state->PySSLErrorObject;
- assert(ret <= 0);
e = ERR_peek_last_error();
if (sslsock->ssl != NULL) {
@@ -619,32 +618,21 @@ PySSL_SetError(PySSLSocket *sslsock, int ret, const char *filename, int lineno)
case SSL_ERROR_SYSCALL:
{
if (e == 0) {
- PySocketSockObject *s = GET_SOCKET(sslsock);
- if (ret == 0 || (((PyObject *)s) == Py_None)) {
+ /* underlying BIO reported an I/O error */
+ ERR_clear_error();
+#ifdef MS_WINDOWS
+ if (err.ws) {
+ return PyErr_SetFromWindowsErr(err.ws);
+ }
+#endif
+ if (err.c) {
+ errno = err.c;
+ return PyErr_SetFromErrno(PyExc_OSError);
+ }
+ else {
p = PY_SSL_ERROR_EOF;
type = state->PySSLEOFErrorObject;
errstr = "EOF occurred in violation of protocol";
- } else if (s && ret == -1) {
- /* underlying BIO reported an I/O error */
- ERR_clear_error();
-#ifdef MS_WINDOWS
- if (err.ws) {
- return PyErr_SetFromWindowsErr(err.ws);
- }
-#endif
- if (err.c) {
- errno = err.c;
- return PyErr_SetFromErrno(PyExc_OSError);
- }
- else {
- p = PY_SSL_ERROR_EOF;
- type = state->PySSLEOFErrorObject;
- errstr = "EOF occurred in violation of protocol";
- }
- } else { /* possible? */
- p = PY_SSL_ERROR_SYSCALL;
- type = state->PySSLSyscallErrorObject;
- errstr = "Some I/O error occurred";
}
} else {
if (ERR_GET_LIB(e) == ERR_LIB_SSL &&
@@ -1007,7 +995,7 @@ _ssl__SSLSocket_do_handshake_impl(PySSLSocket *self)
err.ssl == SSL_ERROR_WANT_WRITE);
Py_XDECREF(sock);
if (ret < 1)
- return PySSL_SetError(self, ret, __FILE__, __LINE__);
+ return PySSL_SetError(self, __FILE__, __LINE__);
if (PySSL_ChainExceptions(self) < 0)
return NULL;
Py_RETURN_NONE;
@@ -2424,7 +2412,7 @@ _ssl__SSLSocket_write_impl(PySSLSocket *self, Py_buffer *b)
Py_XDECREF(sock);
if (retval == 0)
- return PySSL_SetError(self, retval, __FILE__, __LINE__);
+ return PySSL_SetError(self, __FILE__, __LINE__);
if (PySSL_ChainExceptions(self) < 0)
return NULL;
return PyLong_FromSize_t(count);
@@ -2454,7 +2442,7 @@ _ssl__SSLSocket_pending_impl(PySSLSocket *self)
self->err = err;
if (count < 0)
- return PySSL_SetError(self, count, __FILE__, __LINE__);
+ return PySSL_SetError(self, __FILE__, __LINE__);
else
return PyLong_FromLong(count);
}
@@ -2577,7 +2565,7 @@ _ssl__SSLSocket_read_impl(PySSLSocket *self, Py_ssize_t len,
err.ssl == SSL_ERROR_WANT_WRITE);
if (retval == 0) {
- PySSL_SetError(self, retval, __FILE__, __LINE__);
+ PySSL_SetError(self, __FILE__, __LINE__);
goto error;
}
if (self->exc != NULL)
@@ -2703,7 +2691,7 @@ _ssl__SSLSocket_shutdown_impl(PySSLSocket *self)
}
if (ret < 0) {
Py_XDECREF(sock);
- PySSL_SetError(self, ret, __FILE__, __LINE__);
+ PySSL_SetError(self, __FILE__, __LINE__);
return NULL;
}
if (self->exc != NULL)

20
python3.12.spec
View File

@ -20,7 +20,7 @@ URL: https://www.python.org/
#global prerel ...
%global upstream_version %{general_version}%{?prerel}
Version: %{general_version}%{?prerel:~%{prerel}}
Release: 2%{?dist}
Release: 3%{?dist}
License: Python-2.0.1
@ -396,6 +396,19 @@ Patch422: 00422-fix-tests-for-xmlpullparser-with-expat-2-6-0.patch
# See also: https://sourceware.org/annobin/annobin.html/Test-cf-protection.html
Patch459: 00459-apply-intel-control-flow-technology-for-x86-64.patch
# 00462 # 5324dc5f57e0068f7e4f7b2f20006e88ff5f4e47
# Fix PySSL_SetError handling SSL_ERROR_SYSCALL
#
# Python 3.10 changed from using SSL_write() and SSL_read() to SSL_write_ex() and
# SSL_read_ex(), but did not update handling of the return value.
#
# Change error handling so that the return value is not examined.
# OSError (not EOF) is now returned when retval is 0.
#
# This resolves the issue of failing tests when a system is
# stressed on OpenSSL 3.5.
Patch462: 00462-fix-pyssl_seterror-handling-ssl_error_syscall.patch
# (New patches go here ^^^)
#
# When adding new patches to "python" and "python3" in Fedora, EL, etc.,
@ -1710,6 +1723,11 @@ CheckPython optimized
# ======================================================
%changelog
* Fri May 09 2025 Charalampos Stratakis <cstratak@redhat.com> - 3.12.10-3
- Fix PySSL_SetError handling SSL_ERROR_SYSCALL
- This fixes random flakiness of test_ssl on stressed machines
Resolves: RHEL-88897
* Tue Apr 22 2025 Charalampos Stratakis <cstratak@redhat.com> - 3.12.10-2
- Apply Intel's CET for mitigation against control-flow hijacking attacks
Resolves: RHEL-88326