Bug #75669 [Fbk->NoF]: mysqli_stmt_bind_result causes Segmentation Fault with lighttpd

From: Date: Sun, 10 Oct 2021 04:22:13 +0000
Subject: Bug #75669 [Fbk->NoF]: mysqli_stmt_bind_result causes Segmentation Fault with lighttpd
References: 1  Groups: php.bugs 
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Edit report at https://bugs.php.net/bug.php?id=75669&edit=1

 ID:               75669
 Updated by:       php-bugs@lists.php.net
 Reported by:      humairm at gmail dot com
 Summary:          mysqli_stmt_bind_result causes Segmentation Fault with
                   lighttpd
-Status:           Feedback
+Status:           No Feedback
 Type:             Bug
 Package:          MySQLi related
 Operating System: Linux
 PHP Version:      7.1.12
 Assigned To:      cmb
 Private report:   N

 New Comment:

No feedback was provided. The bug is being suspended because
we assume that you are no longer experiencing the problem.
If this is not the case and you are able to provide the
information that was requested earlier, please do so and
change the status of the bug back to "Re-Opened". Thank you.


Previous Comments:
------------------------------------------------------------------------
[2021-09-30 13:03:02] cmb@php.net

That doesn't look particularly related to lighttpd.  But
regardless, we need a stack backtrace[1] to proceed on this issue.

[1] <https://bugs.php.net/bugs-generating-backtrace.php>

------------------------------------------------------------------------
[2020-10-08 15:55:10] josh at servebyte dot com

I'm seeing the same issue with PHP 7.4.11, except no SIGSEGV with 7.3.23

------------------------------------------------------------------------
[2017-12-12 04:27:38] humairm at gmail dot com

Description:
------------
running php 7 using php-fpm on lighttpd with mysqli on mariadb causes segmentation fault at
mysqli_stmt_bind_result as reported in php-fpm.log:
[pool www] child 24047 exited on signal 11 (SIGSEGV) after 6.518082 seconds from start
lighttpd logs report the following error:
mod_fastcgi.c.2424 unexpected end-of-file (perhaps the fastcgi process died)

2 key observations:

1. commenting out the bind_result line eliminates the error - so something triggers the segmentation
fault when bind_result is called under php 7 (7.1.2)

2. running php 5 (5.5.9) instead of php 7 (7.1.2) does not have the same issue - so it seems there
is something in php version 7.1.2 that is triggering the sigsegv

Test script:
---------------
$stmt = $db->prepare($sql);
$stmt->execute();
$stmt->bind_result($id, $name); //This is where segmentation fault occurs - if this line is
commented out then the error goes away but so does the logic! Same line does not cause any issue
with php 5 and works as desired returning the result set successfully.



------------------------------------------------------------------------



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Edit this bug report at https://bugs.php.net/bug.php?id=75669&edit=1


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