Ubuntu
network-manager package

network-manager consume too much file descriptor and is not able to work correctly

Bug #1716884 reported by arnaud on 2017-09-13

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	network-manager (Ubuntu)	New	Undecided	Unassigned

Bug Description

Detected when I failed to start a vpn client session.

journalctl shows line like:
sept. 13 10:37:29 xxx NetworkManager[1092]: <warn> [1505291849.7302] vpn-connection[0x2786800,4cd810de-c299-41e9-bf4b-c6df18d09b66,"xxx",0]: Could not launch the VPN service. error: Trop de fichiers ouverts.

Indeed, /proc/$PID/fd is full of socket file descriptors. (with PID the pid of NetworkManager)

"strace -e socket -p $PID -f" shows that a netlink socket is opened every 3s and never closed.

[pid 9384] socket(PF_NETLINK, SOCK_RAW|SOCK_CLOEXEC, NETLINK_GENERIC) = 361

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: network-manager 1.2.6-0ubuntu0.16.04.1
ProcVersionSignature: Ubuntu 4.11.0-14.20~16.04.1-generic 4.11.12
Uname: Linux 4.11.0-14-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
CurrentDesktop: GNOME
Date: Wed Sep 13 11:12:05 2017
IfupdownConfig:
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
InstallationDate: Installed on 2016-06-23 (447 days ago)
InstallationMedia: Ubuntu-GNOME 16.04 LTS "Xenial Xerus" - Release amd64 (20160622)
NetworkManager.state:
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=fr_FR.UTF-8
SHELL=/bin/bash
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-nm:
RUNNING VERSION STATE STARTUP CONNECTIVITY NETWORKING WIFI-HW WIFI WWAN-HW WWAN
running 1.2.6 connected started full enabled enabled enabled enabled enabled

Tags:

Revision history for this message

arnaud (amo-macfly) wrote on 2017-09-13:

CRDA.txt Edit (227 bytes, text/plain; charset="utf-8")
Dependencies.txt Edit (9.2 KiB, text/plain; charset="utf-8")
IpAddr.txt Edit (1.4 KiB, text/plain; charset="utf-8")
IpRoute.txt Edit (2.1 KiB, text/plain; charset="utf-8")
IwConfig.txt Edit (728 bytes, text/plain; charset="utf-8")
JournalErrors.txt Edit (107.5 KiB, text/plain; charset="utf-8")
NetDevice.enp3s0f1.txt Edit (891 bytes, text/plain; charset="utf-8")
NetDevice.lo.txt Edit (247 bytes, text/plain; charset="utf-8")
NetDevice.tun0.txt Edit (331 bytes, text/plain; charset="utf-8")
NetDevice.wlp2s0.txt Edit (920 bytes, text/plain; charset="utf-8")
NetDevice.wlx00c0ca82ab04.txt Edit (1.3 KiB, text/plain; charset="utf-8")
NetworkManager.conf.txt Edit (75 bytes, text/plain; charset="utf-8")
PciNetwork.txt Edit (1.3 KiB, text/plain; charset="utf-8")
ProcCpuinfoMinimal.txt Edit (1.1 KiB, text/plain; charset="utf-8")
RfKill.txt Edit (176 bytes, text/plain; charset="utf-8")
WifiSyslog.txt Edit (6.0 MiB, text/plain; charset="utf-8")
nmcli-con.txt Edit (5.1 KiB, text/plain; charset="utf-8")
nmcli-dev.txt Edit (1.1 KiB, text/plain; charset="utf-8")

Revision history for this message

arnaud (amo-macfly) wrote on 2017-09-13:

journalctl.log Edit (6.8 KiB, text/plain)

Looks like the issue starts when connect a USB wifi dongle (based on ath9k_htc).
After a fresh NetworkManager restart, journalctl shows that USB device is enumerated periodically, and for some reasons, failed to be configured correctly.

We can conclude that there is a FD leakage every time a new interface is inserted/removed.

I will check what is wrong with the enumeration/configuration.

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Ubuntunetwork-manager package