From 3c4517ffb63d6adfdac5f9f7d51d834a22ac2cd9 Mon Sep 17 00:00:00 2001
From: zhongwuzw <zhongwuzw@qq.com>
Date: Wed, 13 Dec 2023 09:47:52 -0800
Subject: [PATCH] Add safe guard when receive network response data too long
 (#41717)

Summary:
Fixes https://github.com/facebook/react-native/issues/41651

## Changelog:

[IOS] [FIXED] - Add safe guard when receive network response data too long

Pull Request resolved: https://github.com/facebook/react-native/pull/41717

Test Plan: None.

Reviewed By: cortinico

Differential Revision: D51981597

Pulled By: dmytrorykun

fbshipit-source-id: fabaa1490684da6725270e8ca617e3da97c56978
---
 .../Libraries/Network/RCTNetworkTask.mm          | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/packages/react-native/Libraries/Network/RCTNetworkTask.mm b/packages/react-native/Libraries/Network/RCTNetworkTask.mm
index fc2c6dcad9f..47a2e92d0d5 100644
--- a/packages/react-native/Libraries/Network/RCTNetworkTask.mm
+++ b/packages/react-native/Libraries/Network/RCTNetworkTask.mm
@@ -164,7 +164,21 @@ RCT_NOT_IMPLEMENTED(-(instancetype)init)
     if (!_data) {
       _data = [NSMutableData new];
     }
-    [_data appendData:data];
+    @try {
+      [_data appendData:data];
+    } @catch (NSException *exception) {
+      _status = RCTNetworkTaskFinished;
+      if (_completionBlock) {
+        RCTURLRequestCompletionBlock completionBlock = _completionBlock;
+        [self dispatchCallback:^{
+          completionBlock(
+              self->_response, nil, RCTErrorWithMessage(exception.reason ?: @"Request's received data too long."));
+        }];
+      }
+      [self invalidate];
+      return;
+    }
+
     length = _data.length;
   }