Bug #76109 [Com]: Unsafe access to fpm scoreboard

From: Date: Sat, 17 Mar 2018 19:38:55 +0000
Subject: Bug #76109 [Com]: Unsafe access to fpm scoreboard
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-214397@lists.php.net to get a copy of this message 
Edit report at https://bugs.php.net/bug.php?id=76109&edit=1

 ID:                 76109
 Comment by:         backhaus at traum-ferienwohnungen dot de
 Reported by:        backhaus at traum-ferienwohnungen dot de
 Summary:            Unsafe access to fpm scoreboard
 Status:             Open
 Type:               Bug
 Package:            FPM related
 Operating System:   Linux
 PHP Version:        master-Git-2018-03-17 (Git)
 Block user comment: N
 Private report:     N

 New Comment:

Pull request is https://github.com/php/php-src/pull/3185. Cannot
attach because the bug tracker cannot load it from github for some reason.


Previous Comments:
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[2018-03-17 13:59:58] backhaus at traum-ferienwohnungen dot de

Description:
------------
It seems there is an unsafe access to the scoreboard procs in fpm_status_handle_request. The
scoreboard is copied under a lock, but later scoreboard procs are copied from scoreboard_p without
locking. 
This was pointed out to me by bukka in https://github.com/php/php-src/pull/3182#discussion_r174150992
.
The risk of this is pretty low. The only impact in can imagine being inconsistent readings on the
status page.




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Edit this bug report at https://bugs.php.net/bug.php?id=76109&edit=1

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