PR56052: resolve problems with expired sessions

session_load providers cache the session_rec pointer, so hollow
them out and reuse them instead of replacing them.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1874673 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 8 insertions, 9 deletions

diff --git a/modules/session/mod_session.c b/modules/session/mod_session.c
index b72ab140c6..8a7c385a5a 100644
--- a/modules/session/mod_session.c
+++ b/modules/session/mod_session.c
@@ -137,23 +137,22 @@ static apr_status_t ap_session_load(request_rec * r, session_rec ** z)
             ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01817)
                     "error while decoding the session, "
                     "session not loaded: %s", r->uri);
-            zz = NULL;
+            /* preserve pointers to zz in load/save providers */
+            memset(zz, 0, sizeof(session_rec));
+            zz->pool = r->pool;
+            zz->entries = apr_table_make(zz->pool, 10);
         }
 
        /* invalidate session if session is expired */
         if (zz && zz->expiry && zz->expiry < now) {
             ap_log_rerror(APLOG_MARK, APLOG_TRACE2, 0, r, "session is expired");
-            zz = NULL;
+            /* preserve pointers to zz in load/save providers */
+            memset(zz, 0, sizeof(session_rec));
+            zz->pool = r->pool;
+            zz->entries = apr_table_make(zz->pool, 10);
         }
     }
 
-    /* no luck, create a blank session */
-    if (!zz) {
-        zz = (session_rec *) apr_pcalloc(r->pool, sizeof(session_rec));
-        zz->pool = r->pool;
-        zz->entries = apr_table_make(zz->pool, 10);
-    }
-
     /* make sure the expiry and maxage are set, if present */
     if (dconf->maxage) {
         if (!zz->expiry) {