[Syslog-ng-maintainers] Bug#913754: syslog-ng hangs in getrandom(2) on boot

[Eugene Berdnikov]

  Hi, Péter.
  
On Thu, Nov 15, 2018 at 08:33:13AM +0100, Kókai Péter wrote:
>    Hello,
>    Which was the previous syslog-ng version ?

 The version 3.13.2-5 was installed 25 Oct, and according to boot logs
 previous version was free from this bug. As far as I understand
 contents of /var/log/dpkg.log, those lines

 2018-10-25 13:06:19 status half-installed syslog-ng:all 3.13.2-4.1
 2018-10-25 13:06:20 status unpacked syslog-ng:all 3.13.2-5

 mean that version 3.13.2-4.1 was upgraded to 3.13.2-5.
 
>    --
>    Kokan
>    On Wed, 14 Nov 2018 at 21:21 Eugene Berdnikov <[1]bd4 at protva.ru> wrote:
> 
>      Package: syslog-ng
>      Version: 3.13.2-5
>      Severity: minor
> 
>       On boot start of syslog-ng as daemon from /etc/init.d (SysV-init)
>       leads to hangup of boot process for several minutes. Strace shows
>       that delay caused by getrandom(2) syscall:
> 
>      1501 22:44:00
>      getrandom("\x74\x78\x56\x35\x28\xad\x52\xd2\xcb\x51\xb1\x30\xc7\x67\x14\x26\x01\xa4\x2d\xa0\x30\x1d\xad\x09\x9e\xe3\x2c\x4e\x07\x55\x0d\x29",
>      32, 0) = 32 <322.583360>
> 
>       Got with "strace -Tt", means reading of 32 random bytes tooks 322
>      seconds.
>       This is expectable: on boot system has no enоuph entropy, so this
>      syscall
>       blocks until entropy is collected by kernel from device drivers.
> 
>       Previous versions of syslog-ng do not hang.
>      --
>       Eugene Berdnikov
> 
> References
> 
>    Visible links
>    1. mailto:bd4 at protva.ru

-- 
 Eugene Berdnikov