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Bug #77632 FFI Segfaults When Called With Variadics
Submitted: 2019-02-18 10:31 UTC Modified: 2019-02-18 10:38 UTC
From: ircmaxell@php.net Assigned: dmitry (profile)
Status: Closed Package: *Extensibility Functions
PHP Version: Next Minor Version OS: Linux
Private report: No CVE-ID: None
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 [2019-02-18 10:31 UTC] ircmaxell@php.net 
Description:
------------
FFI causes a segfault if called with variadics.

Test script:
---------------
<?php

$libc = FFI::cdef("int printf(const char *format, ...);", "libc.so.6");
$args = ["test"];
$libc->printf(...$args);

Expected result:
----------------
test

Actual result:
--------------
Segmentation fault:

Program received signal SIGSEGV, Segmentation fault.
0x0000555555b0826a in zend_check_arg_send_type (zf=0x55555659b710 <executor_globals+1296>, arg_num=0, mask=3) at Zend/zend_compile.h:943
943             return UNEXPECTED((zf->common.arg_info[arg_num].pass_by_reference & mask) != 0);

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AllCommentsChangesGit/SVN commitsRelated reports
 [2019-02-18 10:38 UTC] krakjoe@php.net
-Assigned To: +Assigned To: dmitry
 [2019-02-18 15:12 UTC] dmitry@php.net 
Automatic comment on behalf of dmitry@zend.com
Revision: http://git.php.net/?p=php-src.git;a=commit;h=5661feb1ef929111ef7765672fcb49813eee86fc
Log: Fixed bug #77632 (FFI Segfaults When Called With Variadics)
 [2019-02-18 15:12 UTC] dmitry@php.net
-Status: Assigned +Status: Closed
 [2020-11-17 13:07 UTC] ricardo dot cescon at panthermedia dot net 
I still have a problem with PHP 7.4.12

int vips_image_write_to_file(VipsImage *image, const char *name, ...);
 => segmentation fault

int vips_image_write_to_file(VipsImage *image, const char *name);
 => no segmentation fault, but function not useable :-(
 
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