[Bug 8231] New: ip addr list crash

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=8231

           Summary: ip addr list crash
           Product: Busybox
           Version: 1.22.x
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: minor
          Priority: P5
         Component: Networking
        AssignedTo: unassigned at busybox.net
        ReportedBy: mak-busybox at greenhills.co.uk
                CC: busybox-cvs at busybox.net
   Estimated Hours: 0.0


I ran into a crash trying to run "ip addr list" in a docker container running
busybox from https://registry.hub.docker.com/_/busybox/:

```
mak at trinity10:~$ docker run --publish-service srvC.net1.calico --name c-C -ti
busybox:latest sh
/ # busybox 
BusyBox v1.22.1 (2014-05-22 23:22:11 UTC) multi-call binary.
...

/ # ifconfig
cali0     Link encap:Ethernet  HWaddr EE:EE:EE:EE:EE:EE  
          inet addr:192.168.89.20  Bcast:0.0.0.0  Mask:255.255.255.255
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:7 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:738 (738.0 B)  TX bytes:648 (648.0 B)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

/ # ip addr list
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group
default 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
Segmentation fault
```

See also https://github.com/Metaswitch/calico-docker/issues/4

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