mod_session_dbd: fix a segmentation fault in the function dbd_remove.

The segmentation fault is caused by an uninitialized function pointer session_dbd_acquire_fn.
PR 53452

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1408958 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 8 insertions, 16 deletions

diff --git a/modules/session/mod_session_dbd.c b/modules/session/mod_session_dbd.c
index a1fbdc797b..59575ed558 100644
--- a/modules/session/mod_session_dbd.c
+++ b/modules/session/mod_session_dbd.c
@@ -333,18 +333,12 @@ static apr_status_t dbd_remove(request_rec * r, const char *key)
 {
 
     apr_status_t rv;
+    ap_dbd_t *dbd;
     apr_dbd_prepared_t *statement;
     int rows = 0;
 
     session_dbd_dir_conf *conf = ap_get_module_config(r->per_dir_config,
                                                       &session_dbd_module);
-    ap_dbd_t *dbd = session_dbd_acquire_fn(r);
-    if (dbd == NULL) {
-        ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01861)
-                      "failed to acquire database connection to remove "
-                      "session with key '%s'", key);
-        return APR_EGENERAL;
-    }
 
     if (conf->deletelabel == NULL) {
         ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01862)
@@ -352,15 +346,13 @@ static apr_status_t dbd_remove(request_rec * r, const char *key)
         return APR_EGENERAL;
     }
 
-    statement = apr_hash_get(dbd->prepared, conf->deletelabel,
-                             APR_HASH_KEY_STRING);
-    if (statement == NULL) {
-        ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01863)
-                      "prepared statement could not be found for "
-                      "SessionDBDdeletelabel with the label '%s'",
-                      conf->deletelabel);
-        return APR_EGENERAL;
-    }
+    rv = dbd_init(r, conf->deletelabel, &dbd, &statement);
+    if (rv != APR_SUCCESS) {
+		// No need to do additional error logging here, it has already
+		// been done in dbd_init if needed
+		return rv;
+	}
+
     rv = apr_dbd_pvbquery(dbd->driver, r->pool, dbd->handle, &rows, statement,
                           key, NULL);
     if (rv != APR_SUCCESS) {