#22084: odhcpd infinite loop, uses >80% CPU
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Reporter: edwin@… | Owner: developers
Type: defect | Status: new
Priority: normal | Milestone:
Component: packages | Version: Chaos Calmer 15.05
Keywords: |
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Hardware: TP-LINK TL-WR1043ND v2
OpenWRT version: CHAOS CALMER (15.05, r46767)
Mem: 37896K used, 23332K free, 2204K shrd, 2040K buff, 16840K cached
CPU: 53% usr 36% sys 0% nic 3% idle 0% io 0% irq 6% sirq
Load average: 0.80 0.37 0.21 4/37 7545
PID PPID USER STAT VSZ %VSZ %CPU COMMAND
6961 1 root R 1164 2% 83% /usr/sbin/odhcpd
Sometimes odhcpd goes into a loop and sends out lots of ICMPv6 RA packets,
to which one particular Linux machine on my LAN responds with ICMPv6 RS,
odchpd answers with RA, and so on ... generating 2878 packets in ~5.5s.
If /etc/init.d/odhcpd stop and then start it again it immediately goes
into this high CPU usage.
If I stop both my router and the Linux machine and start them again, then
odhcpd behaves well for a few minutes, and then goes into this loop again.
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Ticket URL: <https://dev.openwrt.org/ticket/22084>
OpenWrt <http://openwrt.org>
Opensource Wireless Router Technology
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