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[2014-10-02 19:36 UTC] pegasus at vaultwiki dot org
Description:
------------
I don't know what causes this, but the current build of the master branch is completely unusable on my site. SIGABRT is triggered on every single request that routes through PHP-FPM. For now, I've rolled back to PHP 5.6.0.
Expected result:
----------------
No SIGABRT.
Actual result:
--------------
#0 0x0000003f3e232635 in raise () from /lib64/libc.so.6
#1 0x0000003f3e233e15 in abort () from /lib64/libc.so.6
#2 0x0000003f3e22b75e in __assert_fail_base () from /lib64/libc.so.6
#3 0x0000003f3e22b820 in __assert_fail () from /lib64/libc.so.6
#4 0x0000000000983cda in _convert_to_string (op=0x7fff3b272790,
__zend_filename=0xf62af8 "/root/php-src/Zend/zend_vm_execute.h",
__zend_lineno=33522) at /root/php-src/Zend/zend_operators.c:596
#5 0x0000000000a39897 in ZEND_INCLUDE_OR_EVAL_SPEC_CV_HANDLER (
execute_data=0x7fe9b30375d0) at /root/php-src/Zend/zend_vm_execute.h:33522
#6 0x00000000009e1c40 in execute_ex (execute_data=0x7fe9b30375d0)
at /root/php-src/Zend/zend_vm_execute.h:352
#7 0x000000000097c2ae in zend_call_function (fci=0x7fff3b272ac0,
fci_cache=0x7fff3b272a60) at /root/php-src/Zend/zend_execute_API.c:849
#8 0x00000000009b786d in zend_call_method (object=0x7fe9b3032660,
obj_ce=0x7fe9b2370718, fn_proxy=0x7fe9b2370848,
function_name=0xf6139f "__tostring", function_name_len=10,
retval_ptr=0x7fff3b272bc0, param_count=0, arg1=0x0, arg2=0x0)
at /root/php-src/Zend/zend_interfaces.c:101
#9 0x00000000009d3118 in zend_std_cast_object_tostring (
readobj=0x7fe9b3032660, writeobj=0x7fff3b272c70, type=6)
at /root/php-src/Zend/zend_object_handlers.c:1564
#10 0x0000000000984f48 in _zval_get_string_func (op=0x7fe9b3032660)
at /root/php-src/Zend/zend_operators.c:851
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Last updated: Mon Nov 03 16:00:02 2025 UTC |
Just noticed there was more to the backtrace: #11 0x00000000009924e8 in zend_make_printable_zval (expr=0x7fe9b3032660, expr_copy=0x7fff3b272d10) at /root/php-src/Zend/zend.c:220 #12 0x000000000098b97b in concat_function (result=0x7fe9b3032670, op1=0x7fe9b1e7bb70, op2=0x7fe9b3032660) at /root/php-src/Zend/zend_operators.c:1541 #13 0x00000000009ef6d9 in ZEND_CONCAT_SPEC_CONST_VAR_HANDLER ( execute_data=0x7fe9b302cb90) at /root/php-src/Zend/zend_vm_execute.h:6053 #14 0x00000000009e1c40 in execute_ex (execute_data=0x7fe9b302cb90) at /root/php-src/Zend/zend_vm_execute.h:352 #15 0x00000000009e1d7d in zend_execute (op_array=0x7fe9b3075000, return_value=0x0) at /root/php-src/Zend/zend_vm_execute.h:381 #16 0x0000000000994826 in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /root/php-src/Zend/zend.c:1290 #17 0x00000000009059b3 in php_execute_script (primary_file=0x7fff3b277430) at /root/php-src/main/main.c:2560 #18 0x0000000000a634ba in main (argc=8, argv=0x7fff3b277658) at /root/php-src/sapi/fpm/fpm/fpm_main.c:1948I think I have narrowed down the issue. I believe the SEGABRT is triggered when an eval is performed on the contents of a function's static variable. ==== function statically_eval() { static $code = '$i = 1;'; if ($code) { eval($code); } } statically_eval(); === However, as soon as the code is change like so: === function statically_eval() { static $code = '$i = 1;'; if ($code) { eval(strval($code)); } } statically_eval(); === Then it works as expected (note the extra strval in the eval call). Moving the strval to a separate line does not fix the problem, only when nested is the SIGABRT avoided.