Stack overflow when dumping deeply chained objects #20840
Description
Description
The following code:
<?php
class Node {
public $next;
}
$firstNode = new Node();
$node = $firstNode;
for ($i = 0; $i < 30000; $i++) {
$newNode = new Node();
$node->next = $newNode;
$node = $newNode;
}
try {
var_dump($firstNode);
} catch (Error $e) {
echo $e->getMessage(), "\n";
}
while ($next = $firstNode->next) {
$firstNode->next = $next->next;
}
?>
<?phpResulted in this output:
AddressSanitizer:DEADLYSIGNAL
=================================================================
==2614946==ERROR: AddressSanitizer: stack-overflow on address 0x7ffe49bb8f68 (pc 0x00000067a71e bp 0x7ffe49bb97b0 sp 0x7ffe49bb8f70 T0)
#0 0x67a71e in __asan_memset (/home/php/sapi/cli/php+0x67a71e)
#1 0x15b1b81 in xbuf_format_converter /home/php/main/spprintf.c:756:5
#2 0x1ffd6a5 in zend_vspprintf /home/php/Zend/zend.c:294:2
#3 0x155bcc6 in php_printf /home/php/main/main.c:948:9
#4 0x14a8316 in php_var_dump /home/php/ext/standard/var.c:114:3
#5 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#6 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#7 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#8 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#9 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#10 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#11 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#12 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#13 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#14 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#15 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#16 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#17 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#18 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#19 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#20 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#21 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#22 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#23 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#24 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#25 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#26 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#27 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#28 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#29 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#30 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#31 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#32 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#33 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#34 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#35 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#36 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#37 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#38 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#39 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#40 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#41 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#42 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#43 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#44 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#45 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#46 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#47 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#48 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#49 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#50 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#51 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#52 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#53 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#54 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#55 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#56 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#57 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#58 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#59 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#60 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#61 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#62 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#63 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#64 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#65 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#66 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#67 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#68 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#69 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#70 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#71 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#72 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#73 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#74 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#75 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#76 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#77 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#78 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#79 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#80 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#81 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#82 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#83 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#84 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#85 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#86 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#87 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#88 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#89 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#90 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#91 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#92 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#93 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#94 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#95 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#96 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#97 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#98 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#99 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#100 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#101 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#102 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#103 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#104 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#105 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#106 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#107 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#108 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#109 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#110 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#111 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#112 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#113 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#114 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#115 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#116 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#117 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#118 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#119 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#120 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#121 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#122 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#123 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#124 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#125 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#126 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#127 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#128 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#129 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#130 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#131 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#132 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#133 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#134 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#135 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#136 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#137 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#138 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#139 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#140 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#141 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#142 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#143 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#144 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#145 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#146 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#147 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#148 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#149 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#150 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#151 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#152 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#153 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#154 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#155 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#156 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#157 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#158 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#159 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#160 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#161 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#162 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#163 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#164 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#165 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#166 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#167 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#168 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#169 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#170 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#171 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#172 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#173 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#174 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#175 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#176 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#177 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#178 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#179 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#180 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#181 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#182 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#183 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#184 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#185 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#186 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#187 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#188 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#189 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#190 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#191 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#192 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#193 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#194 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#195 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#196 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#197 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#198 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#199 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#200 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#201 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#202 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#203 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#204 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#205 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#206 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#207 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#208 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#209 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#210 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#211 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#212 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#213 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#214 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#215 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#216 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#217 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#218 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#219 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#220 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#221 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#222 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#223 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#224 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#225 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#226 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#227 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#228 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#229 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#230 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#231 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#232 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#233 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#234 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#235 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#236 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
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#483 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#484 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#485 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#486 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#487 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#488 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#489 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#490 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
#491 0x14a9840 in php_object_property_dump /home/php/ext/standard/var.c:86:3
#492 0x14a9840 in php_var_dump /home/php/ext/standard/var.c:201:7
SUMMARY: AddressSanitizer: stack-overflow (/home/php/sapi/cli/php+0x67a71e) in __asan_memset
==2614946==ABORTING
But I expected this output instead:
Variable text
PHP Version
PHP 8.5.0-dev (cli) (built: Apr 24 2025 21:58:49) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.5.0-dev, Copyright (c) Zend Technologies
Operating System
Ubuntu 20.04