[FS#1177] dnsmasq spams syslog on loss of WAN connection

[LEDE Bugs]

A new Flyspray task has been opened.  Details are below. 

User who did this - Russell Senior (russell) 

Attached to Project - LEDE Project
Summary - dnsmasq spams syslog on loss of WAN connection
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Medium
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - Supply the following if possible:
 - Device problem occurs on

Observed on an APU2

 - Software versions of LEDE release, packages, etc.

DISTRIB_ID='LEDE'
DISTRIB_RELEASE='SNAPSHOT'
DISTRIB_REVISION='r5244-f0c37f6ceb'
DISTRIB_CODENAME='reboot'
DISTRIB_TARGET='x86/64'
DISTRIB_ARCH='x86_64'
DISTRIB_DESCRIPTION='LEDE Reboot SNAPSHOT r5244-f0c37f6ceb'
DISTRIB_TAINTS='no-all busybox'

# opkg list_installed | grep dnsmasq
dnsmasq - 2.78-2



 - Steps to reproduce

In my case, I have an upstream service provisioned with pppoe.  Occasionally, the pppoe session dies as the ISP does some kind of unannounced maintenance.  Since updating recently from a March 2016 build of OpenWrt, when this outage occurs, dnsmasq sends many messages, like this:

 Nov 16 02:03:10 192.168.80.1 dnsmasq[27288]: failed to send packet: Permission denied
Nov 16 02:03:10 192.168.80.1 dnsmasq[27288]: failed to send packet: Permission denied
Nov 16 02:03:10 192.168.80.1 dnsmasq[27288]: failed to send packet: Permission denied
Nov 16 02:03:10 192.168.80.1 dnsmasq[27288]: failed to send packet: Permission denied
Nov 16 02:03:10 192.168.80.1 dnsmasq[27288]: failed to send packet: Permission denied
Nov 16 02:03:10 192.168.80.1 dnsmasq[27288]: failed to send packet: Permission denied
Nov 16 02:03:10 192.168.80.1 dnsmasq[27288]: failed to send packet: Permission denied
Nov 16 02:03:10 192.168.80.1 dnsmasq[27288]: failed to send packet: Permission denied
Nov 16 02:03:10 192.168.80.1 dnsmasq[27288]: failed to send packet: Permission denied
Nov 16 02:03:10 192.168.80.1 dnsmasq[27288]: failed to send packet: Permission denied
Nov 16 02:03:10 192.168.80.1 dnsmasq[27288]: failed to send packet: Permission denied
Nov 16 02:03:10 192.168.80.1 dnsmasq[27288]: failed to send packet: Permission denied
Nov 16 02:03:10 192.168.80.1 dnsmasq[27288]: failed to send packet: Permission denied
Nov 16 02:03:10 192.168.80.1 dnsmasq[27288]: failed to send packet: Permission denied
Nov 16 02:03:10 192.168.80.1 dnsmasq[27288]: failed to send packet: Permission denied
Nov 16 02:03:10 192.168.80.1 dnsmasq[27288]: failed to send packet: Permission denied
Nov 16 02:03:10 192.168.80.1 dnsmasq[27288]: failed to send packet: Permission denied
Nov 16 02:03:10 192.168.80.1 dnsmasq[27288]: failed to send packet: Permission denied
Nov 16 02:03:10 192.168.80.1 dnsmasq[27288]: failed to send packet: Permission denied
Nov 16 02:03:10 192.168.80.1 dnsmasq[27288]: failed to send packet: Permission denied
Nov 16 02:03:10 192.168.80.1 dnsmasq[27288]: failed to send packet: Permission denied
Nov 16 02:03:10 192.168.80.1 dnsmasq[27288]: failed to send packet: Permission denied
Nov 16 02:03:10 192.168.80.1 dnsmasq[27288]: failed to send packet: Permission denied
Nov 16 02:03:10 192.168.80.1 dnsmasq[27288]: failed to send packet: Permission denied
Nov 16 02:03:10 192.168.80.1 dnsmasq[27288]: failed to send packet: Permission denied
Nov 16 02:03:10 192.168.80.1 dnsmasq[27288]: failed to send packet: Permission denied
Nov 16 02:03:10 192.168.80.1 dnsmasq[27288]: failed to send packet: Permission denied
Nov 16 02:03:10 192.168.80.1 dnsmasq[27288]: failed to send packet: Permission denied


nearly 30 per second.

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1177