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Bug #75669 mysqli_stmt_bind_result causes Segmentation Fault with lighttpd
Submitted: 2017-12-12 04:27 UTC Modified: 2021-01-12 18:35 UTC
Avg. Score:5.0 ± 0.0
Reproduced:3 of 3 (100.0%)
Same Version:3 (100.0%)
Same OS:3 (100.0%)
From: humairm at gmail dot com Assigned:
Status: Open Package: MySQLi related
PHP Version: 7.1.12 OS: Linux
Private report: No CVE-ID: None
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 [2017-12-12 04:27 UTC] humairm at gmail dot com
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);
$stmt->bind_result($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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 [2020-10-08 15:55 UTC] josh at servebyte dot com
I'm seeing the same issue with PHP 7.4.11, except no SIGSEGV with 7.3.23
 [2021-01-12 18:35 UTC]
-Summary: Segmentation Fault +Summary: mysqli_stmt_bind_result causes Segmentation Fault with lighttpd
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