Comment 5 for bug 520464

From an strace:

open("/proc/net/dev", O_RDONLY) = 5
ioctl(4, SIOCGIFCONF, {80, {{"lo", {AF_INET, inet_addr("127.0.0.1")}}, {"br0", {AF_INET, inet_addr("10.0.0.2")}}}}) = 0
fstat(5, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fda7fef2000
read(5, "Inter-| Receive "..., 1024) = 1024
ioctl(4, SIOCGIFFLAGS, {ifr_name="lo", ifr_flags=IFF_UP|IFF_LOOPBACK|IFF_RUNNING}) = 0
ioctl(4, SIOCGIFFLAGS, {ifr_name="eth0", ifr_flags=IFF_UP|IFF_BROADCAST|IFF_RUNNING|IFF_MULTICAST}) = 0
...
ioctl(4, SIOCGIFFLAGS, {ifr_name="vnet1", ifr_flags=IFF_UP|IFF_BROADCAST|IFF_RUNNING|IFF_MULTICAST}) = 0
ioctl(4, SIOCGIFADDR, {ifr_name="vnet1", ???}) = -1 EADDRNOTAVAIL (Cannot assign requested address)
read(5, "", 1024) = 0
close(5) = 0
munmap(0x7fda7fef2000, 4096) = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---