[Bug 203573] wlan0 leaves arp entries forces reboot

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=203573

            Bug ID: 203573
           Summary: wlan0 leaves arp entries forces reboot
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: phk at FreeBSD.org

When wlan0 interface on recent -current is down'ed a stale arp entry is left
behind which cannot be removed by any means short of reboot.

Seen on: base r287959 and base r288823 amd64.

critter phk> ifconfig wlan0
wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        ether 60:67:20:b6:fd:38
        inet 192.168.60.199 netmask 0xffffff00 broadcast 192.168.60.255 
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
        media: IEEE 802.11 Wireless Ethernet MCS mode 11na
        status: associated
        ssid freebsd channel 40 (5200 MHz 11a ht/40-) bssid 14:cc:20:85:92:4f
        country US authmode WPA2/802.11i privacy ON deftxkey UNDEF
        TKIP 3:128-bit txpower 14 bmiss 10 mcastrate 6 mgmtrate 6 scanvalid 60
        ampdulimit 64k ampdudensity 8 -amsdutx amsdurx shortgi wme
        roaming MANUAL
        groups: wlan 

root at critter:~ # ifconfig wlan0 down delete
root at critter:~ # ifconfig wlan0 down delete
ifconfig: ioctl (SIOCDIFADDR): Can't assign requested address

root at critter:~ # arp -a
? (192.168.60.199) at 60:67:20:b6:fd:38 on wlan0 permanent [ethernet]
root at critter:~ # netstat -rn
Routing tables

Internet:
Destination        Gateway            Flags     Netif Expire
127.0.0.1          link#2             UH          lo0

Internet6:
Destination                       Gateway                       Flags     Netif
Expire
::/96                             ::1                           UGRS        lo0
::1                               link#2                        UH          lo0
::ffff:0.0.0.0/96                 ::1                           UGRS        lo0
fe80::/10                         ::1                           UGRS        lo0
fe80::%lo0/64                     link#2                        U           lo0
fe80::1%lo0                       link#2                        UHS         lo0
ff02::/16                         ::1                           UGRS        lo0
root at critter:~ # netstat -in
Name    Mtu Network       Address              Ipkts Ierrs Idrop    Opkts Oerrs
 Coll
 em0*  1500 <Link#1>                           0     0     0        0     0    
0
  lo0 16384 <Link#2>                                           496     0     0 
    496     0     0
  lo0     - ::1/128       ::1                      0     -     -        0     -
    -
  lo0     - fe80::1%lo0/6 fe80::1%lo0              0     -     -        0     -
    -
  lo0     - 127.0.0.0/8   127.0.0.1              496     -     -      496     -
    -
wlan0  1500 <Link#3>           127.0.0.1      51     0     0       41     6    
0

-- 
You are receiving this mail because:
You are the assignee for the bug.