Bug #70111 [Asn->Csd]: Segfault when a function uses both an explicit return type and an explicit cast
Edit report at https://bugs.php.net/bug.php?id=70111&edit=1
ID: 70111
Updated by: laruence@php.net
Reported by: malte dot skoruppa at gmail dot com
Summary: Segfault when a function uses both an explicit
return type and an explicit cast
-Status: Assigned
+Status: Closed
Type: Bug
Package: Reproducible crash
Operating System: Ubuntu 14.04 LTS
PHP Version: 7.0Git-2015-07-22 (Git)
Assigned To: laruence
Block user comment: N
Private report: N
New Comment:
Automatic comment on behalf of laruence
Revision: http://git.php.net/?p=php-src.git;a=commit;h=3e479ef424b2193f41a28fda18bde076a79ea71e
Log: Fixed bug #70111 (Segfault when a function uses both an explicit return type and an explicit
cast)
Previous Comments:
------------------------------------------------------------------------
[2015-07-22 11:30:21] laruence@php.net
this is an opcache issue...
------------------------------------------------------------------------
[2015-07-22 10:31:27] malte dot skoruppa at gmail dot com
Description:
------------
When a function both
* specifies an explicit return type
* AND uses an explicit cast of the return value,
then the PHP interpreter segfaults non-deterministically with high probability.
To reproduce, execute the following script with the PHP interpreter several times in a row.
Sometimes it works, sometimes it segfaults.
Test script:
---------------
<?php
foo();
function foo() : string {
return (string) 42;
}
Expected result:
----------------
PHP interpreter should not crash, no matter how many times the script is run.
Actual result:
--------------
The PHP interpreter segfaults when running this script. Not always, but very often:
$ php crash.php
Segmentation fault (core dumped)
gdb backtrace:
Core was generated by `php crash.php'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x0000000000000000 in ?? ()
(gdb) bt
#0 0x0000000000000000 in ?? ()
#1 0x0000000000888c20 in execute_ex (ex=0x7fa8daa14030) at
/home/malte/php7/php-src/Zend/zend_vm_execute.h:406
#2 0x0000000000888d32 in zend_execute (op_array=0x7fa8daa75100, return_value=0x0) at
/home/malte/php7/php-src/Zend/zend_vm_execute.h:450
#3 0x000000000082ee86 in zend_execute_scripts (type=8, retval=0x0, file_count=3) at
/home/malte/php7/php-src/Zend/zend.c:1399
#4 0x000000000079aefc in php_execute_script (primary_file=0x7ffdb976c850) at
/home/malte/php7/php-src/main/main.c:2475
#5 0x00000000008ec6ac in do_cli (argc=2, argv=0x2f6b0e0) at
/home/malte/php7/php-src/sapi/cli/php_cli.c:971
#6 0x00000000008ed870 in main (argc=2, argv=0x2f6b0e0) at
/home/malte/php7/php-src/sapi/cli/php_cli.c:1338
------------------------------------------------------------------------
--
Edit this bug report at https://bugs.php.net/bug.php?id=70111&edit=1
Thread (4 messages)