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Bug #76835 FPM stuck at getrandom()
Submitted: 2018-09-02 07:25 UTC Modified: 2018-09-02 11:00 UTC
From: olafvdspek at gmail dot com Assigned: cmb (profile)
Status: Not a bug Package: FPM related
PHP Version: 7.2.9 OS: Debian
Private report: No CVE-ID: None
View Developer Edit
 [2018-09-02 07:25 UTC] olafvdspek at gmail dot com 
Description:
------------
Debian is running in a VM.
At boot, it tries to start php-fpm via systemd. After a minute or so, it times out as php-fpm seems stuck at a getrandom() call.



Actual result:
--------------
# strace -p 383
strace: Process 383 attached
getrandom(0x7ffd606d51f0, 16, 0)        = ? ERESTARTSYS (To be restarted if SA_RESTART is set)
--- SIGTERM {si_signo=SIGTERM, si_code=SI_USER, si_pid=1, si_uid=0} ---
+++ killed by SIGTERM +++

# service php7.2-fpm status
● php7.2-fpm.service - The PHP 7.2 FastCGI Process Manager
   Loaded: loaded (/lib/systemd/system/php7.2-fpm.service; enabled; vendor preset: enabled)
   Active: failed (Result: timeout) since Sun 2018-09-02 09:22:00 CEST; 2min 28s ago
     Docs: man:php-fpm7.2(8)
  Process: 383 ExecStart=/usr/sbin/php-fpm7.2 --nodaemonize --fpm-config /etc/php/7.2/fpm/php-fpm.conf (code=killed, signal=TERM)
 Main PID: 383 (code=killed, signal=TERM)

Sep 02 09:20:29 debian systemd[1]: Starting The PHP 7.2 FastCGI Process Manager...
Sep 02 09:22:00 debian systemd[1]: php7.2-fpm.service: Start operation timed out. Terminating.
Sep 02 09:22:00 debian systemd[1]: php7.2-fpm.service: Failed with result 'timeout'.
Sep 02 09:22:00 debian systemd[1]: Failed to start The PHP 7.2 FastCGI Process Manager.

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 [2018-09-02 08:52 UTC] spam2 at rhsoft dot net 
it's not a bug when you missed to setup your VM proper so that it don't run out of random


install "haveged" and consider what such a setup has for impact on encryption

i recommend replace every certificate generated on that machine, especial ECC is sensible for broken setups
 [2018-09-02 11:00 UTC] cmb@php.net
-Status: Open +Status: Not a bug -Assigned To: +Assigned To: cmb
 [2018-09-02 11:00 UTC] cmb@php.net 
Indeed, if a system fails to get 16 random bytes, that doesn't
look like a bug in PHP.
 
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