From d7996f1b9b89eedf9e8809efd70b4fd21a651aa7 Mon Sep 17 00:00:00 2001
From: Dmitry Volyntsev <xeioex@nginx.com>
Date: Tue, 2 Jun 2026 19:05:53 -0700
Subject: [PATCH] HTTP: fixed missing exceptions in njs handlers

Set pending exceptions before returning NJS_ERROR from njs response output
paths.  Previously sendHeader(), send(), and finish() could fail without an
exception being available to the VM.
---
 nginx/ngx_http_js_module.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/nginx/ngx_http_js_module.c b/nginx/ngx_http_js_module.c
index 447ead13..78de01c5 100644
--- a/nginx/ngx_http_js_module.c
+++ b/nginx/ngx_http_js_module.c
@@ -2983,12 +2983,14 @@ ngx_http_js_ext_send_header(njs_vm_t *vm, njs_value_t *args, njs_uint_t nargs,
     }
 
     if (ngx_http_set_content_type(r) != NGX_OK) {
+        njs_vm_internal_error(vm, "failed to set content type");
         return NJS_ERROR;
     }
 
     r->disable_not_modified = 1;
 
     if (ngx_http_send_header(r) == NGX_ERROR) {
+        njs_vm_internal_error(vm, "failed to send header");
         return NJS_ERROR;
     }
 
@@ -3037,6 +3039,7 @@ ngx_http_js_ext_send(njs_vm_t *vm, njs_value_t *args, njs_uint_t nargs,
 
         b = ngx_calloc_buf(r->pool);
         if (b == NULL) {
+            njs_vm_memory_error(vm);
             return NJS_ERROR;
         }
 
@@ -3048,6 +3051,7 @@ ngx_http_js_ext_send(njs_vm_t *vm, njs_value_t *args, njs_uint_t nargs,
 
         cl = ngx_alloc_chain_link(r->pool);
         if (cl == NULL) {
+            njs_vm_memory_error(vm);
             return NJS_ERROR;
         }
 
@@ -3060,6 +3064,7 @@ ngx_http_js_ext_send(njs_vm_t *vm, njs_value_t *args, njs_uint_t nargs,
     *ll = NULL;
 
     if (ngx_http_output_filter(r, out) == NGX_ERROR) {
+        njs_vm_internal_error(vm, "failed to send response");
         return NJS_ERROR;
     }
 
@@ -3217,6 +3222,7 @@ ngx_http_js_ext_finish(njs_vm_t *vm, njs_value_t *args, njs_uint_t nargs,
     }
 
     if (ngx_http_send_special(r, NGX_HTTP_LAST) == NGX_ERROR) {
+        njs_vm_internal_error(vm, "failed to send response");
         return NJS_ERROR;
     }
 
-- 
2.47.3