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Bug #61164 Crash with PHP 5.4, APC, $_SERVER and ?: operator
Submitted: 2012-02-21 13:20 UTC Modified: 2012-02-27 15:22 UTC
From: cschneid at cschneid dot com Assigned: gopalv (profile)
Status: Closed Package: APC (PECL)
PHP Version: APC-trunk OS: Linux openSUSE 11.3 (x86_64)
Private report: No CVE-ID: None
 [2012-02-21 13:20 UTC] cschneid at cschneid dot com
PHP crashes when combining $_SERVER with ?: operator once APC is loaded into PHP 5.4.

I used a current SVN checkout of PHP 5.4 and APC, compiled it with --enable-debug and used the builtin webserver to test the script below as follows:

$ gdb --args bin/php -S localhost:8000
(gdb) run

$ wget -qO - localhost:8000/
$ wget -qO - localhost:8000/
<second request hangs>

Reproduce code:

$_SERVER['HTTP_HOST'] ?: "foo";

Expected result:

Actual result:

Program received signal SIGSEGV, Segmentation fault.
0x00000000007f0d77 in execute (op_array=0x7ffff7fccdb0) at /home/cschneid/src/php-src-5.4/Zend/zend_vm_execute.h:410
410			if ((ret = OPLINE->handler(execute_data TSRMLS_CC)) > 0) {
(gdb) bt
#0  0x00000000007f0d77 in execute (op_array=0x7ffff7fccdb0) at /home/cschneid/src/php-src-5.4/Zend/zend_vm_execute.h:410
#1  0x00000000007b39be in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /home/cschneid/src/php-src-5.4/Zend/zend.c:1272
#2  0x000000000072a2e1 in php_execute_script (primary_file=0x7fffffffcf90) at /home/cschneid/src/php-src-5.4/main/main.c:2473
#3  0x000000000090751b in php_cli_server_dispatch_script (server=0xeb2e80, client=0x10376f0) at /home/cschneid/src/php-src-5.4/sapi/cli/php_cli_server.c:1869
#4  0x000000000090847a in php_cli_server_dispatch (server=0xeb2e80, client=0x10376f0) at /home/cschneid/src/php-src-5.4/sapi/cli/php_cli_server.c:2030
#5  0x0000000000908b6c in php_cli_server_recv_event_read_request (server=0xeb2e80, client=0x10376f0) at /home/cschneid/src/php-src-5.4/sapi/cli/php_cli_server.c:2208
#6  0x0000000000908eb5 in php_cli_server_do_event_for_each_fd_callback (_params=0x7fffffffd190, fd=7, event=1) at /home/cschneid/src/php-src-5.4/sapi/cli/php_cli_server.c:2294
#7  0x0000000000904383 in php_cli_server_poller_iter_on_active (poller=0xeb2e88, opaque=0x7fffffffd190, callback=0x908cc4 <php_cli_server_do_event_for_each_fd_callback>) at /home/cschneid/src/php-src-5.4/sapi/cli/php_cli_server.c:777
#8  0x0000000000908f78 in php_cli_server_do_event_for_each_fd (server=0xeb2e80, rhandler=0x908aa8 <php_cli_server_recv_event_read_request>, whandler=0x908b93 <php_cli_server_send_event>) at /home/cschneid/src/php-src-5.4/sapi/cli/php_cli_server.c:2320
#9  0x0000000000908fc6 in php_cli_server_do_event_loop (server=0xeb2e80) at /home/cschneid/src/php-src-5.4/sapi/cli/php_cli_server.c:2330
#10 0x00000000009092cf in do_cli_server (argc=3, argv=0x7fffffffe598) at /home/cschneid/src/php-src-5.4/sapi/cli/php_cli_server.c:2431
#11 0x00000000008fdda1 in main (argc=3, argv=0x7fffffffe598) at /home/cschneid/src/php-src-5.4/sapi/cli/php_cli.c:1359


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AllCommentsChangesGit/SVN commitsRelated reports
 [2012-02-23 08:40 UTC]
This has some similarities to
 [2012-02-27 14:08 UTC]
Taking a look at this bug - does this happen on an i386 build too?
 [2012-02-27 15:21 UTC]
Automatic comment from SVN on behalf of gopalv
Log: fix bug #61164: handle the JMP_SET_VAR opcode
 [2012-02-27 15:22 UTC]
-Status: Open +Status: Closed -Assigned To: +Assigned To: gopalv
 [2012-02-27 15:22 UTC]
Fixed in SVN

Please test.
 [2012-07-21 21:28 UTC]
Automatic comment from SVN on behalf of ab
Log: added test for bug #61164
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