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stack overflow in json_encode() · Issue #15168 · php/php-src · GitHub
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Description
Description
The following code:
<?php
class Node
{
/** @var Node */
public $previous;
/** @var Node */
public $next;
}
$firstNode = new Node();
$firstNode->previous = $firstNode;
$firstNode->next = $firstNode;
$circularDoublyLinkedList = $firstNode;
for ($i = 0; $i < 200000; $i++) {
$currentNode = $circularDoublyLinkedList;
$nextNode = $circularDoublyLinkedList->next;
$newNode = new Node();
$newNode->previous = $currentNode;
$currentNode->next = $newNode;
$newNode->next = $nextNode;
$nextNode->previous = $newNode;
$circularDoublyLinkedList = $nextNode;
}
$random_var=$GLOBALS[array_rand($GLOBALS)];
json_encode($circularDoublyLinkedList);
?>Resulted in this output:
AddressSanitizer:DEADLYSIGNAL
=================================================================
==785404==ERROR: AddressSanitizer: stack-overflow on address 0x7ffe577a9eb8 (pc 0x7f8c68704379 bp 0x7ffe577aa750 sp 0x7ffe577a9ec0 T0)
#0 0x7f8c68704378 in __interceptor_memcpy ../../../../src/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc:790
#1 0x564774053b9d in smart_str_appendl_ex /php-src/Zend/zend_smart_str.h:130
#2 0x564774053f42 in smart_str_appendl /php-src/Zend/zend_smart_str.h:168
#3 0x56477405967f in php_json_escape_string /php-src/ext/json/json_encoder.c:365
#4 0x564774055dfc in php_json_encode_array /php-src/ext/json/json_encoder.c:167
#5 0x56477405d61d in php_json_encode_zval /php-src/ext/json/json_encoder.c:656
#6 0x564774056115 in php_json_encode_array /php-src/ext/json/json_encoder.c:178
#7 0x56477405d61d in php_json_encode_zval /php-src/ext/json/json_encoder.c:656
#8 0x564774056115 in php_json_encode_array /php-src/ext/json/json_encoder.c:178
...
#247 0x56477405d61d in php_json_encode_zval /php-src/ext/json/json_encoder.c:656
#248 0x564774056115 in php_json_encode_array /php-src/ext/json/json_encoder.c:178
SUMMARY: AddressSanitizer: stack-overflow ../../../../src/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc:790 in __interceptor_memcpy
==785404==ABORTING
PHP Version
PHP 8.4.0-dev
Operating System
ubuntu 22.04
arnaud-lb
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