php.net |  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login

go to bug id or search bugs for

Bug #75353 Some files always corrupted in file cache
Submitted: 2017-10-10 15:32 UTC Modified: 2021-04-06 14:49 UTC
Votes:2
Avg. Score:3.5 ± 0.5
Reproduced:2 of 2 (100.0%)
Same Version:1 (50.0%)
Same OS:2 (100.0%)
From: mike@php.net Assigned:
Status: Open Package: opcache
PHP Version: 7.1.10 OS: Linux
Private report: No CVE-ID: None
View Developer Edit
Welcome back! If you're the original bug submitter, here's where you can edit the bug or add additional notes.
If you forgot your password, you can retrieve your password here.
Password:
Status:
Package:
Bug Type:
Summary:
From: mike@php.net
New email:
PHP Version: OS:

 

 [2017-10-10 15:32 UTC] mike@php.net 
Description:
------------
Some files will always end up corrupted in file cache, e.g. Laravel's Support/Str.php

Test script:
---------------
Shell session:

# install laravel
git clone https://github.com/laravel/laravel.git
cd laravel
composer install

# minimal env config
APP_KEY=$(pwgen 32 1)
LARAVEL_TMP=$(mktemp -d)

# prime opcache
php -d opcache.file_cache=$LARAVEL_TMP \
    -d opcache.error_log=stderr \
    -d opcache.log_verbosity_level=2 \
    -S localhost:9999 server.php &
FCGI_PID=$!
sleep 1
for i in "" {1..5}; do curl -sSL localhost:9999/$i >/dev/null; done
kill $FCGI_PID

# now start over
php -d opcache.file_cache=$LARAVEL_TMP \
    -d opcache.error_log=stderr \
    -d opcache.log_verbosity_level=4 \
    -S localhost:9999 server.php \
2> >(sed -re 's/(^.*Added key).*/\1/' | uniq -c) &
FCGI_PID=$!
sleep 1
for i in "" {1..5}; do curl -sSL localhost:9999/$i >/dev/null; done
kill $FCGI_PID


Actual result:
--------------
[1] 14149
PHP 7.1.10RC1 Development Server started at Tue Oct 10 17:21:00 2017
Listening on http://localhost:9999
Document root is /home/mike/src/laravel.git
Press Ctrl-C to quit.
      1 Tue Oct 10 17:21:01 2017 (14149): Warning corrupted file '/tmp/.../Illuminate/Support/Str.php.bin'
      1 
      1 Tue Oct 10 17:21:01 2017 (14149): Message Cached script '/home/.../Illuminate/Support/Str.php'
    201 Tue Oct 10 17:21:01 2017 (14149): Message Added key                                                                                                                                                                                                                                                                   
[1]  + 14149 terminated  ~/src/php-719-opcache/usr/bin/php -d opcache.file_cache=$LARAVEL_TMP -d  -d

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2017-10-11 06:34 UTC] mike@php.net 
Valgrind says info.checksum points to uninitialized bytes when writev()'d in zend_file_cache_script_store(), but it is set a couple lines above.
 [2021-04-06 14:49 UTC] cmb@php.net 
I have seen that error several times, but almost certainly not on
a regular basis, and that issue may have been resolved in the
meantime.  There is a relevant comment regarding uninitialized
regions[1] in the sources.

[1] <https://github.com/php/php-src/blob/php-7.4.16/ext/opcache/zend_file_cache.c#L944-L946>
 
PHP Copyright © 2001-2024 The PHP Group
All rights reserved. 		Last updated: Thu Nov 21 18:01:29 2024 UTC