# HG changeset patch
# User Ruslan Ermilov <ru@nginx.com>
# Date 1481827474 -10800
# Node ID a3dc657f4e9530623683e6b85bd7492662e4dc47
# Parent  25d0d6dabe00c01114a93c533b6651127e8a11e9
Resolver: fixed possible use-after-free in worker on fast shutdown.

diff --git a/src/core/ngx_resolver.c b/src/core/ngx_resolver.c
--- a/src/core/ngx_resolver.c
+++ b/src/core/ngx_resolver.c
@@ -300,6 +300,10 @@ ngx_resolver_cleanup(void *data)
 #endif
 
         if (r->event) {
+            if (r->event->timer_set) {
+                ngx_del_timer(r->event);
+            }
+
             ngx_free(r->event);
         }