From 94a5043e03d3d83b661af64c3723d5f775c10706 Mon Sep 17 00:00:00 2001
From: zhangqiang <zhangqiang@kylinos.cn>
Date: Fri, 1 Jul 2022 01:26:09 +0800
Subject: [PATCH 3/6] =?UTF-8?q?<bugfix><https://gitee.com/src-openeuler/ga?=
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---
 src/lstack/api/lstack_signal.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lstack/api/lstack_signal.c b/src/lstack/api/lstack_signal.c
index 87cbdda..4dba472 100644
--- a/src/lstack/api/lstack_signal.c
+++ b/src/lstack/api/lstack_signal.c
@@ -78,7 +78,7 @@ int lstack_sigaction(int sig_num, const struct sigaction *action, struct sigacti
 {
     struct sigaction new_action;
 
-    if ((match_hijack_signal(sig_num) != 0) && (action->sa_handler == SIG_DFL)) {
+    if ((match_hijack_signal(sig_num) != 0) && (action && action->sa_handler == SIG_DFL)) {
         new_action = *action;
         new_action.sa_flags |= SA_RESETHAND;
         new_action.sa_handler = lstack_sig_default_handler;
-- 
2.23.0