# HG changeset patch
# User Valentin Bartenev <vbart@nginx.com>
# Date 1427480360 -10800
# Node ID 953ef81705e1e2d735e956e5fc6406a862e29419
# Parent  3d4730eada9ce03e9247fea0d32068dcecb57a54
Events: fixed possible crash on start or reload.

The main thread could wake up and start processing the notify event
before the handler was set.

diff --git a/src/event/modules/ngx_epoll_module.c b/src/event/modules/ngx_epoll_module.c
--- a/src/event/modules/ngx_epoll_module.c
+++ b/src/event/modules/ngx_epoll_module.c
@@ -683,14 +683,14 @@ ngx_epoll_notify(ngx_event_handler_pt ha
 {
     static uint64_t inc = 1;
 
+    notify_event.data = handler;
+
     if ((size_t) write(notify_fd, &inc, sizeof(uint64_t)) != sizeof(uint64_t)) {
         ngx_log_error(NGX_LOG_ALERT, notify_event.log, ngx_errno,
                       "write() to eventfd %d failed", notify_fd);
         return NGX_ERROR;
     }
 
-    notify_event.data = handler;
-
     return NGX_OK;
 }