Date: Wed, 23 May 2012 02:03:51 GMT From: Arnaud Lacombe <lacombar@gmail.com> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/168245: [regression] Permanent ARP entry not deleted on interface configuration failure Message-ID: <201205230203.q4N23pll027410@red.freebsd.org> Resent-Message-ID: <201205230210.q4N2AFff093933@freefall.freebsd.org>
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>Number: 168245
>Category: kern
>Synopsis: [regression] Permanent ARP entry not deleted on interface configuration failure
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed May 23 02:10:15 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator: Arnaud Lacombe
>Release: 9.0-RELEASE
>Organization:
n/a
>Environment:
>Description:
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.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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