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mmarkk@imac:~# brctl addbr qwe
mmarkk@imac:~# unshare -n /bin/bash
root@imac:~# ip link
14: lo: <LOOPBACK> mtu 16436 qdisc noop state DOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
root@imac:~# brctl show
bridge name bridge id STP enabled interfaces
qwe 8000.000000000000 no
root@imac:~# brctl delbr qwe
bridge qwe doesn't exist; can't delete it
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So, network device is not available, but present in list of bridges. This is the bug, as I think.
Reproducible in linux kernels 3.8.2 and 3.2.0
Segmentation fault
