1 files changed, 11 insertions, 5 deletions

diff --git a/src/nxt_master_process.c b/src/nxt_master_process.c
index 77e720cf..44cf8d8b 100644
--- a/src/nxt_master_process.c
+++ b/src/nxt_master_process.c
@@ -317,19 +317,25 @@ nxt_master_start_worker_process(nxt_task_t *task, nxt_runtime_t *rt,
         return NXT_ERROR;
     }
 
+    init->user_cred = (nxt_user_cred_t *) (init + 1);
+
     user = nxt_pointer_to(init->user_cred, sizeof(nxt_user_cred_t));
 
     nxt_memcpy(user, app_conf->user.start, app_conf->user.length);
     user[app_conf->user.length] = '\0';
 
-    group = nxt_pointer_to(user, app_conf->user.length + 1);
+    init->user_cred->user = user;
 
-    nxt_memcpy(group, app_conf->group.start, app_conf->group.length);
-    group[app_conf->group.length] = '\0';
+    if (app_conf->group.start != NULL) {
+        group = nxt_pointer_to(user, app_conf->user.length + 1);
 
-    init->user_cred = (nxt_user_cred_t *) (init + 1);
+        nxt_memcpy(group, app_conf->group.start, app_conf->group.length);
+        group[app_conf->group.length] = '\0';
+
+    } else {
+        group = NULL;
+    }
 
-    init->user_cred->user = user;
     if (nxt_user_cred_get(task, init->user_cred, group) != NXT_OK) {
         return NXT_ERROR;
     }