From: Dmitry Volyntsev <xeioex@nginx.com>
Date: Tue, 7 Jul 2020 12:23:42 +0000 (+0000)
Subject: Fixed potential NULL-pointer dereference (CID 1464584).
X-Git-Tag: 0.4.2~5
X-Git-Url: http://git.kaiwu.me/postgresql/log/contrib/postgres_fdw/static/%7B@url%7D?a=commitdiff_plain;h=7505487e93af77846dea245cad8352ac7c66aa6e;p=njs.git

Fixed potential NULL-pointer dereference (CID 1464584).
---

diff --git a/src/njs_generator.c b/src/njs_generator.c
index 88790aac..5174a08e 100644
--- a/src/njs_generator.c
+++ b/src/njs_generator.c
@@ -571,8 +571,13 @@ njs_lookup_line(njs_vm_code_t *code, uint32_t offset)
     njs_uint_t         n;
     njs_vm_line_num_t  *map;
 
-    n = (code->lines != NULL) ? code->lines->items : 0;
-    map = (njs_vm_line_num_t *) code->lines->start;
+    n = 0;
+    map = NULL;
+
+    if (code->lines != NULL) {
+        n = code->lines->items;
+        map = (njs_vm_line_num_t *) code->lines->start;
+    }
 
     while (n != 0) {
         if (offset >= map->offset && (n == 1 || offset < map[1].offset)) {