commit 425fa864ce4cc2326996c8fd280ddf61e485ba23
author Daniel Stenberg <daniel@haxx.se> Mon Jul 27 11:17:31 2020 +0200
committer Daniel Stenberg <daniel@haxx.se> Mon Jul 27 12:53:46 2020 +0200
tree b18ca7f7e2144125369b02342f5f943417e43c39
parent 0b859692265bccd5ffdc1be27e7307b2d2fa7c1a

quiche: handle calling disconnect twice

Reported-by: lilongyan-huawei on github
Fixes #5726
Closes #5727

lib/vquic/quiche.c

diff --git a/lib/vquic/quiche.c b/lib/vquic/quiche.c
index be6f15c..fd9cb8b 100644
--- a/lib/vquic/quiche.c
+++ b/lib/vquic/quiche.c
@@ -95,8 +95,14 @@
     quiche_h3_config_free(qs->h3config);
   if(qs->h3c)
     quiche_h3_conn_free(qs->h3c);
-  quiche_config_free(qs->cfg);
-  quiche_conn_free(qs->conn);
+  if(qs->cfg) {
+    quiche_config_free(qs->cfg);
+    qs->cfg = NULL;
+  }
+  if(qs->conn) {
+    quiche_conn_free(qs->conn);
+    qs->conn = NULL;
+  }
   return CURLE_OK;
 }