Bug 168245
| Summary: | [arp] [regression] Permanent ARP entry not deleted on interface configuration failure | ||
|---|---|---|---|
| Product: | Base System | Reporter: | Arnaud <lacombar> |
| Component: | kern | Assignee: | Alexander V. Chernikov <melifaro> |
| Status: | Open --- | ||
| Severity: | Affects Only Me | CC: | melifaro |
| Priority: | Normal | ||
| Version: | 9.0-RELEASE | ||
| Hardware: | Any | ||
| OS: | Any | ||
Responsible Changed From-To: freebsd-bugs->freebsd-net batch change: For bugs that match the following - Status Is In progress AND - Untouched since 2018-01-01. AND - Affects Base System OR Documentation DO: Reset to open status. Note: I did a quick pass but if you are getting this email it might be worthwhile to double check to see if this bug ought to be closed. |
Permanent ARP entry not deleted on interface configuration failure. Older FreeBSD (ie. 7.1) does not show this bug. How-To-Repeat: # ifconfig vr0 172.31.0.1 # route delete 172.31.0.1 delete host 172.31.0.1 # route delete 172.31.0.0/16 delete net 172.31.0.0 # route add 172.31.0.1 -iface vr1 add host 172.31.0.1: gateway vr1 # ifconfig vr0 delete 172.31.0.1 At this point, only the route to 172.31.0.1 exist, ARP for 172.31.0.1 has been cleared. # ifconfig vr0 172.31.0.1 ifconfig: ioctl (SIOCAIFADDR): File exists The stale route entry cause the configuration to fail, leading to: # ifconfig vr0 vr0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 options=8280b<RXCSUM,TXCSUM,VLAN_MTU,WOL_UCAST,WOL_MAGIC,LINKSTATE> ether 00:00:24:cb:f4:90 nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> media: Ethernet autoselect (100baseTX <full-duplex>) status: active this is expected, however: # arp -a [...] ? (172.31.0.1) at 00:00:24:cb:f4:90 on vr0 permanent [ethernet] This should have been cleared while returning from the configuration path.