From 6c1be2988e56cde6db376e578eb5a909e26bbf5f Mon Sep 17 00:00:00 2001
From: Valentin Gosu <valentin.gosu@gmail.com>
Date: Tue, 5 Aug 2025 11:37:46 +0000
Subject: [PATCH] Bug 1923017 - Fix null ptr deref in CacheFileIOManager::Read 
 a=diannaS

Original Revision: https://phabricator.services.mozilla.com/D253658

Differential Revision: https://phabricator.services.mozilla.com/D259939
---
 netwerk/cache2/CacheFileIOManager.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/netwerk/cache2/CacheFileIOManager.cpp b/netwerk/cache2/CacheFileIOManager.cpp
index 20a28e930196..9f9fd511a1cf 100644
--- a/netwerk/cache2/CacheFileIOManager.cpp
+++ b/netwerk/cache2/CacheFileIOManager.cpp
@@ -1953,6 +1953,10 @@ nsresult CacheFileIOManager::Read(CacheFileHandle* aHandle, int64_t aOffset,
     return NS_ERROR_NOT_INITIALIZED;
   }
 
+  if (!aHandle) {
+    return NS_ERROR_NULL_POINTER;
+  }
+
   nsresult rv;
   RefPtr<CacheFileIOManager> ioMan = gInstance;