Router: fixed segmentation fault.

In the case that routes or upstreams is empty and the pass option is a variable.
If the resolved pass is routes or upstreams, a segment error occurred.

2 files changed, 8 insertions, 0 deletions

diff --git a/src/nxt_http_route.c b/src/nxt_http_route.c
index c38acdf3..065b3488 100644
--- a/src/nxt_http_route.c
+++ b/src/nxt_http_route.c
@@ -1567,6 +1567,10 @@ nxt_http_route_find(nxt_http_routes_t *routes, nxt_str_t *name,
 {
     nxt_http_route_t  **route, **end;
 
+    if (routes == NULL) {
+        return NXT_DECLINED;
+    }
+
     route = &routes->route[0];
     end = route + routes->items;
 
diff --git a/src/nxt_upstream.c b/src/nxt_upstream.c
index 9f81b286..de9b1d49 100644
--- a/src/nxt_upstream.c
+++ b/src/nxt_upstream.c
@@ -78,6 +78,10 @@ nxt_upstream_find(nxt_upstreams_t *upstreams, nxt_str_t *name,
     uint32_t        i, n;
     nxt_upstream_t  *upstream;
 
+    if (upstreams == NULL) {
+        return NXT_DECLINED;
+    }
+
     upstream = &upstreams->upstream[0];
     n = upstreams->items;