user/node: Update to 16.19.0; fix test, NULL deref

* The worker-stdio test no longer raises RangeError on 32-bit Intel.

* The sigint test is no longer flaky (backported from 18 branch).

* The C++ Environment handler no longer segfaults when /proc is
  unmounted.  (Submitted upstream.)

Fixes: #795

1 files changed, 28 insertions, 0 deletions

diff --git a/user/node/env-nullptr-backport.patch b/user/node/env-nullptr-backport.patch
new file mode 100644
index 000000000..02878dc25
--- /dev/null
+++ b/user/node/env-nullptr-backport.patch
@@ -0,0 +1,28 @@
+From 8214cc175f0c4e600a3af5cedd94e4fd4d8d839e Mon Sep 17 00:00:00 2001
+From: "A. Wilcox" <AWilcox@Wilcox-Tech.com>
+Date: Sat, 17 Dec 2022 19:39:01 -0600
+Subject: [PATCH] env: check size of args before using for exec_path
+
+If we are in an artifically created Environment that has no args set,
+and uv_exepath returns an error (for instance, if /proc is not mounted
+on a Linux system), then we crash with a nullptr deref attempting to
+use argv[0].
+
+Fixes: https://github.com/nodejs/node/issues/45901
+---
+ src/env.cc | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/env.cc b/src/env.cc
+index 5172d71ad6a6..97e0ac581113 100644
+--- node-v16.15.0/src/env.cc.old	2022-04-26 22:03:30.000000000 +0000
++++ node-v16.15.0/src/env.cc	2022-12-18 01:19:23.417720353 +0000
+@@ -309,7 +309,7 @@
+   std::string exec_path;
+   if (uv_exepath(exec_path_buf, &exec_path_len) == 0) {
+     exec_path = std::string(exec_path_buf, exec_path_len);
+-  } else {
++  } else if (argv.size() > 0) {
+     exec_path = argv[0];
+   }
+