Bug #81391 [Fbk->Opn]: Segfault in a forked process
Edit report at https://bugs.php.net/bug.php?id=81391&edit=1
ID: 81391
Updated by: cmb@php.net
Reported by: mrskman at gmail dot com
Summary: Segfault in a forked process
-Status: Feedback
+Status: Open
Type: Bug
Package: *General Issues
Operating System: Ubuntu 18.04
PHP Version: 8.0.10
Block user comment: N
Private report: N
New Comment:
> On the other hand deep recursion seems plausible.
In which case this likely is a WONTFIX.
Previous Comments:
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[2021-08-27 08:44:43] mrskman at gmail dot com
I wouldn't say that this is an infinite recursion problem. In that case it wouldn't finish
successfuly on 2 other servers. On the other hand deep recursion seems plausible.
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[2021-08-27 08:08:40] nikic@php.net
This looks like a stack overflow (due to infinite recursion or too deep recursion) to me. Does that
sound plausible?
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[2021-08-27 07:52:01] mrskman at gmail dot com
Description:
------------
I run pcntl_fork() to process large arrays in background. One of arrays is causing segfaults on 2 of
4 servers. I tried to increase memory limit to a 10x higher value just to be sure this is not a
memory issue but it still segfaults on 2 servers.
I was not able to create a test script. The only thing I have is a backtrace from attached gdb.
Actual result:
--------------
Program received signal SIGSEGV, Segmentation fault.
0x0000564372710a35 in execute_ex ()
(gdb) bt
#0 0x0000564372710a35 in execute_ex ()
#1 0x00005643725ac1cd in zend_call_function ()
#2 0x000056437238beb9 in zif_array_map ()
#3 0x00005643727133c4 in execute_ex ()
#4 0x00005643725ac1cd in zend_call_function ()
#5 0x000056437238beb9 in zif_array_map ()
#6 0x00005643727133c4 in execute_ex ()
#7 0x00005643725ac1cd in zend_call_function ()
#8 0x000056437238beb9 in zif_array_map ()
#9 0x00005643727133c4 in execute_ex ()
#10 0x00005643725ac1cd in zend_call_function ()
#11 0x000056437238beb9 in zif_array_map ()
#12 0x00005643727133c4 in execute_ex ()
#13 0x00005643725ac1cd in zend_call_function ()
#14 0x000056437238beb9 in zif_array_map ()
#15 0x00005643727133c4 in execute_ex ()
...
#1593 0x00005643727133c4 in execute_ex ()
#1594 0x00005643725ac1cd in zend_call_function ()
#1595 0x000056437238beb9 in zif_array_map ()
#1596 0x00005643727133c4 in execute_ex ()
#1597 0x00005643725ac1cd in zend_call_function ()
#1598 0x000056437238beb9 in zif_array_map ()
#1599 0x00005643727133c4 in execute_ex ()
#1600 0x00005643725ac1cd in zend_call_function ()
#1601 0x000056437238beb9 in zif_array_map ()
#1602 0x00005643727133c4 in execute_ex ()
#1603 0x00005643725ac1cd in zend_call_function ()
#1604 0x000056437238beb9 in zif_array_map ()
#1605 0x00005643727133c4 in execute_ex ()
#1606 0x00005643725ac1cd in zend_call_function ()
#1607 0x000056437238beb9 in zif_array_map ()
#1608 0x00005643727133c4 in execute_ex ()
#1609 0x00005643725ac1cd in zend_call_function ()
#1610 0x000056437238beb9 in zif_array_map ()
#1611 0x00005643727133c4 in execute_ex ()
#1612 0x00005643725ac1cd in zend_call_function ()
#1613 0x000056437238beb9 in zif_array_map ()
#1614 0x00005643727133c4 in execute_ex ()
#1615 0x00005643725ac1cd in zend_call_function ()
#1616 0x000056437238beb9 in zif_array_map ()
#1617 0x00005643727133c4 in execute_ex ()
#1618 0x00005643725ac1cd in zend_call_function ()
#1619 0x000056437238beb9 in zif_array_map ()
#1620 0x00005643727133c4 in execute_ex ()
#1621 0x00005643725ac1cd in zend_call_function ()
#1622 0x000056437238beb9 in zif_array_map ()
#1623 0x00005643727133c4 in execute_ex ()
#1624 0x00005643725ac1cd in zend_call_function ()
#1625 0x000056437238beb9 in zif_array_map ()
#1626 0x00005643727133c4 in execute_ex ()
#1627 0x00005643725ac1cd in zend_call_function ()
#1628 0x000056437238beb9 in zif_array_map ()
#1629 0x00005643727133c4 in execute_ex ()
#1630 0x00005643725ac1cd in zend_call_function ()
#1631 0x000056437239fce8 in zif_call_user_func_array ()
#1632 0x00005643727133c4 in execute_ex ()
#1633 0x00005643725ac1cd in zend_call_function ()
#1634 0x000056437239fce8 in zif_call_user_func_array ()
#1635 0x00005643727133c4 in execute_ex ()
#1636 0x000056437272b53d in zend_execute ()
#1637 0x00005643725cf6d9 in zend_execute_scripts ()
#1638 0x000056437250a213 in php_execute_script ()
#1639 0x000056437278ee1f in do_cli ()
#1640 0x00005643727901e6 in main ()
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