From f5b9e0f2a8ada29cebeb6e51cbcbea396375ab26 Mon Sep 17 00:00:00 2001
From: huangyu <huangyu106@huawei.com>
Date: Wed, 7 Dec 2022 14:35:26 +0800
Subject: [PATCH] fix Segmentation fault in nss module

Signed-off-by: huangyu <huangyu106@huawei.com>
---
 nss/nss_module.c | 2 +-
 nss/nsswitch.c   | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/nss/nss_module.c b/nss/nss_module.c
index b28cb94a..bb2807e9 100644
--- a/nss/nss_module.c
+++ b/nss/nss_module.c
@@ -352,7 +352,7 @@ nss_load_all_libraries (enum nss_database service)
 {
   nss_action_list ni = NULL;
 
-  if (__nss_database_get (service, &ni))
+  if (__nss_database_get (service, &ni) && ni != NULL)
     while (ni->module != NULL)
       {
         __nss_module_load (ni->module);
diff --git a/nss/nsswitch.c b/nss/nsswitch.c
index 6b7d4c78..c9d7e372 100644
--- a/nss/nsswitch.c
+++ b/nss/nsswitch.c
@@ -133,7 +133,7 @@ libc_hidden_def (__nss_next2)
 void *
 __nss_lookup_function (nss_action_list ni, const char *fct_name)
 {
-  if (ni->module == NULL)
+  if (ni == NULL || ni->module == NULL)
     return NULL;
   return __nss_module_get_function (ni->module, fct_name);
 }
-- 
2.33.0