From 11e4d46e28ba6123785e1809b26f66e37f9aa532 Mon Sep 17 00:00:00 2001
From: Kai Ninomiya <kainino@chromium.org>
Date: Tue, 02 Jun 2026 17:21:47 -0700
Subject: [PATCH] [dawn][wire] Zero-init ChunkedCommandSerializer space

Fixed: 515437522
Change-Id: Ia97bf8e68a7612428634c1187f67af96fa899ebf
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/312015
Auto-Submit: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Loko Kung <lokokung@google.com>
Commit-Queue: Kai Ninomiya <kainino@chromium.org>
---

diff --git a/src/dawn/wire/ChunkedCommandSerializer.h b/src/dawn/wire/ChunkedCommandSerializer.h
index 67e4fc7..cac63cb 100644
--- a/src/dawn/wire/ChunkedCommandSerializer.h
+++ b/src/dawn/wire/ChunkedCommandSerializer.h
@@ -135,7 +135,9 @@
             return;
         }
 
-        auto cmdSpace = std::unique_ptr<char[]>(new char[requiredSize]);
+        // Allocate as zero-initialized because padding won't get initialized during command
+        // serialization (and this whole buffer is sent raw to the other end of the wire).
+        auto cmdSpace = std::unique_ptr<char[]>(new char[requiredSize]{});
 
         SerializeBuffer serializeBuffer(cmdSpace.get(), requiredSize);
         WireResult rCmd = SerializeCmd(cmd, requiredSize, &serializeBuffer);