From 7e02124a06264c73e2d20adff8d57ddba66c86a4 Mon Sep 17 00:00:00 2001
From: Darshan Sen <darshan.sen@postman.com>
Date: Sun, 3 Oct 2021 10:25:19 +0530
Subject: [PATCH] dgram: add `nread` assertion to `UDPWrap::OnRecv`

This asserts that the number of bytes received by the socket is less
than or equal to the size allocated for the temporary storage.

Signed-off-by: Darshan Sen <darshan.sen@postman.com>

PR-URL: https://github.com/nodejs/node/pull/40295
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Minwoo Jung <nodecorelab@gmail.com>
---
 src/udp_wrap.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/udp_wrap.cc b/src/udp_wrap.cc
index f068995e9b068f..4a0c6aeaa940d2 100644
--- a/src/udp_wrap.cc
+++ b/src/udp_wrap.cc
@@ -20,7 +20,6 @@
 // USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 #include "udp_wrap.h"
-#include "allocated_buffer-inl.h"
 #include "env-inl.h"
 #include "node_buffer.h"
 #include "node_sockaddr-inl.h"
@@ -725,6 +724,7 @@ void UDPWrap::OnRecv(ssize_t nread,
   } else if (nread == 0) {
     bs = ArrayBuffer::NewBackingStore(isolate, 0);
   } else {
+    CHECK_LE(static_cast<size_t>(nread), bs->ByteLength());
     bs = BackingStore::Reallocate(isolate, std::move(bs), nread);
   }