From: Dmitry Volyntsev <xeioex@nginx.com>
Date: Sun, 13 Sep 2026 19:53:30 +0000 (-0700)
Subject: Align opaque values
X-Git-Tag: 1.0.2~48
X-Git-Url: https://git.kaiwu.me/ngx_http_auth_basic_module.html?a=commitdiff_plain;h=306f0e1a1a3ad40ce71abe942f1f98ee722a827e;p=njs.git

Align opaque values

Opaque values are cast to njs_value_t pointers by the public API.  Match
njs_value_t alignment while retaining the four uint32_t filler fields.

UndefinedBehaviorSanitizer reports unaligned njs_value_t accesses.
---

diff --git a/src/njs.h b/src/njs.h
index b33a8568..b6fa1b47 100644
--- a/src/njs.h
+++ b/src/njs.h
@@ -44,8 +44,9 @@ typedef struct njs_external_s         njs_external_t;
  * sizeof(njs_opaque_value_t) == sizeof(njs_value_t).
  */
 
-typedef struct {
+typedef union {
     uint32_t                        filler[4];
+    uint64_t                        align;
 } njs_opaque_value_t;
 
 /* sizeof(njs_value_t) is 16 bytes. */