From: Dmitry Volyntsev <xeioex@nginx.com>
Date: Tue, 9 Jan 2024 00:40:42 +0000 (-0800)
Subject: QueryString: fixed underflow in parse().
X-Git-Url: http://www.kaiwu.me/postgresql/commit/static/gitweb.js?a=commitdiff_plain;h=9a78709b84694567b23287f153d27c0fad8d61a8;p=njs.git

QueryString: fixed underflow in parse().

Previously, njs_query_string_append() might be provided with invalid
val_size value when value in a key-value pair was absent.

Found by UndefinedBehaviorSanitizer.
---

diff --git a/external/njs_query_string_module.c b/external/njs_query_string_module.c
index b30ffe84..c927d8e4 100644
--- a/external/njs_query_string_module.c
+++ b/external/njs_query_string_module.c
@@ -506,7 +506,7 @@ njs_query_string_parser(njs_vm_t *vm, u_char *query, u_char *end,
 
         size = val - key;
 
-        if (val != end) {
+        if (val != part) {
             val += eq->length;
         }