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90c922f2ca
When printing New Address events, the extra_str buffer is overrun,
resulting in weird stuff happening.
> RTNL: Error (0x02) len 20 > 5.252075
Flags: 0 (0x000)
Sequence number: 189 (0x000000bd)
Port ID: 2116
ACK: 0
==4080== Invalid read of size 1
==4080== at 0x4E8000E: vfprintf (in /lib64/libc-2.20.so)
==4080== by 0x4EA8A24: vsnprintf (in /lib64/libc-2.20.so)
==4080== by 0x4E86011: snprintf (in /lib64/libc-2.20.so)
==4080== by 0x403B64: print_packet (nlmon.c:238)
==4080== by 0x40C8FD: print_nlmsghdr (nlmon.c:3197)
==4080== by 0x40CD9E: print_rtnl_msg (nlmon.c:3266)
==4080== by 0x40CE4F: nlmon_print_rtnl (nlmon.c:3298)
==4080== by 0x40D1CD: nlmon_receive (nlmon.c:3390)