On 10/12/2017 09:35 AM, Shuah Khan wrote: > On 10/12/2017 09:25 AM, Xin Long wrote: >> On Thu, Oct 12, 2017 at 11:18 PM, Andreas Radke >> <andreas.radke@xxxxxxxxxxx> wrote: >>> Building the 4.9.x kernel package for Arch Linux 4.9.55 gives this IPv4 error here: >>> >>> Job for dhcpd4.service failed because the control process exited with error code. >>> See "systemctl status dhcpd4.service" and "journalctl -xe" for details. >>> root@server64:/root # systemctl status dhcpd4.service >>> ● dhcpd4.service - IPv4 DHCP server >>> Loaded: loaded (/usr/lib/systemd/system/dhcpd4.service; enabled; vendor preset: disabled) >>> Active: failed (Result: exit-code) since Thu 2017-10-12 17:09:38 CEST; 8s ago >>> Process: 638 ExecStart=/usr/bin/dhcpd -4 -q -user dhcp -cf /etc/dhcpd.conf -pf /run/dhcpd4.pid (code=exited, status=1/FAILURE) >>> >>> Okt 12 17:09:38 server64 dhcpd[638]: If you think you have received this message due to a bug rather >>> Okt 12 17:09:38 server64 dhcpd[638]: than a configuration issue please read the section on submitting >>> Okt 12 17:09:38 server64 dhcpd[638]: bugs on either our web page at www.isc.org or in the README file >>> Okt 12 17:09:38 server64 dhcpd[638]: before submitting a bug. These pages explain the proper >>> Okt 12 17:09:38 server64 dhcpd[638]: process and the information we find helpful for debugging. >>> Okt 12 17:09:38 server64 dhcpd[638]: >>> Okt 12 17:09:38 server64 dhcpd[638]: exiting. >>> Okt 12 17:09:38 server64 systemd[1]: dhcpd4.service: Control process exited, code=exited status=1 >>> Okt 12 17:09:38 server64 systemd[1]: dhcpd4.service: Failed with result 'exit-code'. >>> Okt 12 17:09:38 server64 systemd[1]: Failed to start IPv4 DHCP server. >>> >>> journalctl -xe >>> Okt 12 17:09:37 server64 systemd[1]: Starting IPv4 DHCP server... >>> -- Subject: Unit dhcpd4.service has begun start-up >>> -- Defined-By: systemd >>> -- Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel >>> -- >>> -- Unit dhcpd4.service has begun starting up. >>> Okt 12 17:09:38 server64 dhcpd[638]: Internet Systems Consortium DHCP Server 4.3.6 >>> Okt 12 17:09:38 server64 dhcpd[638]: Copyright 2004-2017 Internet Systems Consortium. >>> Okt 12 17:09:38 server64 dhcpd[638]: All rights reserved. >>> Okt 12 17:09:38 server64 dhcpd[638]: For info, please visit https://www.isc.org/software/dhcp/ >>> Okt 12 17:09:38 server64 dhcpd[638]: Source compiled to use binary-leases >>> Okt 12 17:09:38 server64 dhcpd[638]: Wrote 0 deleted host decls to leases file. >>> Okt 12 17:09:38 server64 dhcpd[638]: Wrote 0 new dynamic host decls to leases file. >>> Okt 12 17:09:38 server64 dhcpd[638]: Wrote 16 leases to leases file. >>> Okt 12 17:09:38 server64 dhcpd[638]: Can't install packet filter program: Cannot allocate memory >>> Okt 12 17:09:38 server64 dhcpd[638]: >>> Okt 12 17:09:38 server64 dhcpd[638]: If you think you have received this message due to a bug rather >>> Okt 12 17:09:38 server64 dhcpd[638]: than a configuration issue please read the section on submitting >>> Okt 12 17:09:38 server64 dhcpd[638]: bugs on either our web page at www.isc.org or in the README file >>> Okt 12 17:09:38 server64 dhcpd[638]: before submitting a bug. These pages explain the proper >>> Okt 12 17:09:38 server64 dhcpd[638]: process and the information we find helpful for debugging. >>> Okt 12 17:09:38 server64 dhcpd[638]: >>> Okt 12 17:09:38 server64 dhcpd[638]: exiting. >>> Okt 12 17:09:38 server64 systemd[1]: dhcpd4.service: Control process exited, code=exited status=1 >>> Okt 12 17:09:38 server64 systemd[1]: dhcpd4.service: Failed with result 'exit-code'. >>> Okt 12 17:09:38 server64 systemd[1]: Failed to start IPv4 DHCP server. >>> -- Subject: Unit dhcpd4.service has failed >> pls try revert: >> commit 02f7e4101092b88e57c73171174976c8a72a3eba > > Correction. The commit is: > > 345c66695569db83eed100723e4df72cb54df7de > > I will try the revert and let you know. okay reverting the commit 345c66695569db83eed100723e4df72cb54df7de Author: Eric Dumazet <edumazet@xxxxxxxxxx> Date: Mon Oct 2 12:20:51 2017 -0700 socket, bpf: fix possible use after free [ Upstream commit eefca20eb20c66b06cf5ed09b49b1a7caaa27b7b ] Starting from linux-4.4, 3WHS no longer takes the listener lock. Since this time, we might hit a use-after-free in sk_filter_charge(), if the filter we got in the memcpy() of the listener content just happened to be replaced by a thread changing listener BPF filter. To fix this, we need to make sure the filter refcount is not already zero before incrementing it again. Fixes: e994b2f0fb92 ("tcp: do not lock listener to process SYN packets") Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx> Acked-by: Alexei Starovoitov <ast@xxxxxxxxxx> Acked-by: Daniel Borkmann <daniel@xxxxxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> fixes the issue. Looks like this is a fix for another problem. Anyway - I have 4.9.55 - minus 345c66695569db83eed100723e4df72cb54df7de running now with networking operational. thanks, -- Shuah