id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
31962	Raise a more appriopriate exception when session cannot be updated.	Alex Vandiver	Hasan Ramezani	"`django/contrib/sessions/middleware.py` contains the only non-test place where a bare `SuspiciousOperation` is raised; all other locations use one of its more specific subclasses.  Making this suspicious operation that involves a session into a `raise SuspiciousSession` would remove this outlier, and make the exception more specific.

This is also notable because every SuspiciousOperation subclass gets its own logger, so this is the only place that is logged via the `django.security.SuspiciousOperation` logger.

This should only require:

{{{
diff --git django/contrib/sessions/middleware.py django/contrib/sessions/middleware.py
index cb8c1ff45b..f8386a21ce 100644
--- django/contrib/sessions/middleware.py
+++ django/contrib/sessions/middleware.py
@@ -3,7 +3,7 @@ from importlib import import_module

 from django.conf import settings
 from django.contrib.sessions.backends.base import UpdateError
-from django.core.exceptions import SuspiciousOperation
+from django.contrib.sessions.exceptions import SuspiciousSession
 from django.utils.cache import patch_vary_headers
 from django.utils.deprecation import MiddlewareMixin
 from django.utils.http import http_date
@@ -60,7 +60,7 @@ class SessionMiddleware(MiddlewareMixin):
                     try:
                         request.session.save()
                     except UpdateError:
-                        raise SuspiciousOperation(
+                        raise SuspiciousSession(
                             ""The request's session was deleted before the ""
                             ""request completed. The user may have logged ""
                             ""out in a concurrent request, for example.""
}}}"	Cleanup/optimization	closed	contrib.sessions	dev	Normal	fixed			Ready for checkin	1	0	0	0	0	0