Description of problem:
See below.


Version-Release number of selected component (if applicable):
arpwatch-2.1a15-34.fc23.x86_64


Steps to Reproduce:
1. simply run 'arpwatch'


Actual results:
$ gdb arpwatch 
GNU gdb (GDB) Fedora 7.10.1-30.fc23
Copyright (C) 2015 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
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Reading symbols from arpwatch...Reading symbols from /usr/lib/debug/usr/sbin/arpwatch.debug...done.
done.
(gdb) r
Starting program: /usr/sbin/arpwatch 
Missing separate debuginfos, use: dnf debuginfo-install glibc-2.22-7.fc23.x86_64
*** buffer overflow detected ***: /usr/sbin/arpwatch terminated
======= Backtrace: =========
/lib64/libc.so.6(+0x77da5)[0x7ffff784fda5]
/lib64/libc.so.6(__fortify_fail+0x37)[0x7ffff78ec5b7]
/lib64/libc.so.6(+0x112740)[0x7ffff78ea740]
/lib64/libc.so.6(+0x111be9)[0x7ffff78e9be9]
/usr/sbin/arpwatch(+0x2e11)[0x555555556e11]
/usr/sbin/arpwatch(+0x2712)[0x555555556712]
/lib64/libc.so.6(__libc_start_main+0xf0)[0x7ffff77f8580]
/usr/sbin/arpwatch(+0x29b9)[0x5555555569b9]
======= Memory map: ========
555555554000-55555555c000 r-xp 00000000 fd:00 1184992                    /usr/sbin/arpwatch
55555575b000-55555575c000 r--p 00007000 fd:00 1184992                    /usr/sbin/arpwatch
55555575c000-55555575d000 rw-p 00008000 fd:00 1184992                    /usr/sbin/arpwatch
55555575d000-55555597e000 rw-p 00000000 00:00 0                          [heap]
7ffff75c1000-7ffff75d7000 r-xp 00000000 fd:00 1198344                    /usr/lib64/libgcc_s-5.3.1-20151207.so.1
7ffff75d7000-7ffff77d6000 ---p 00016000 fd:00 1198344                    /usr/lib64/libgcc_s-5.3.1-20151207.so.1
7ffff77d6000-7ffff77d7000 r--p 00015000 fd:00 1198344                    /usr/lib64/libgcc_s-5.3.1-20151207.so.1
7ffff77d7000-7ffff77d8000 rw-p 00016000 fd:00 1198344                    /usr/lib64/libgcc_s-5.3.1-20151207.so.1
7ffff77d8000-7ffff798f000 r-xp 00000000 fd:00 1186930                    /usr/lib64/libc-2.22.so
7ffff798f000-7ffff7b8f000 ---p 001b7000 fd:00 1186930                    /usr/lib64/libc-2.22.so
7ffff7b8f000-7ffff7b93000 r--p 001b7000 fd:00 1186930                    /usr/lib64/libc-2.22.so
7ffff7b93000-7ffff7b95000 rw-p 001bb000 fd:00 1186930                    /usr/lib64/libc-2.22.so
7ffff7b95000-7ffff7b99000 rw-p 00000000 00:00 0 
7ffff7b99000-7ffff7bd9000 r-xp 00000000 fd:00 1188976                    /usr/lib64/libpcap.so.1.7.4
7ffff7bd9000-7ffff7dd9000 ---p 00040000 fd:00 1188976                    /usr/lib64/libpcap.so.1.7.4
7ffff7dd9000-7ffff7ddb000 r--p 00040000 fd:00 1188976                    /usr/lib64/libpcap.so.1.7.4
7ffff7ddb000-7ffff7ddc000 rw-p 00042000 fd:00 1188976                    /usr/lib64/libpcap.so.1.7.4
7ffff7ddc000-7ffff7dfd000 r-xp 00000000 fd:00 1192192                    /usr/lib64/ld-2.22.so
7ffff7fd8000-7ffff7fdb000 rw-p 00000000 00:00 0 
7ffff7ff6000-7ffff7ff8000 rw-p 00000000 00:00 0 
7ffff7ff8000-7ffff7ffa000 r--p 00000000 00:00 0                          [vvar]
7ffff7ffa000-7ffff7ffc000 r-xp 00000000 00:00 0                          [vdso]
7ffff7ffc000-7ffff7ffd000 r--p 00020000 fd:00 1192192                    /usr/lib64/ld-2.22.so
7ffff7ffd000-7ffff7ffe000 rw-p 00021000 fd:00 1192192                    /usr/lib64/ld-2.22.so
7ffff7ffe000-7ffff7fff000 rw-p 00000000 00:00 0 
7ffffffde000-7ffffffff000 rw-p 00000000 00:00 0                          [stack]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0                  [vsyscall]

Program received signal SIGABRT, Aborted.
0x00007ffff780ca98 in raise () from /lib64/libc.so.6
Missing separate debuginfos, use: dnf debuginfo-install libgcc-5.3.1-2.fc23.x86_64 libpcap-1.7.4-1.fc23.x86_64
(gdb) bt
#0  0x00007ffff780ca98 in raise () from /lib64/libc.so.6
#1  0x00007ffff780e69a in abort () from /lib64/libc.so.6
#2  0x00007ffff784fdaa in __libc_message () from /lib64/libc.so.6
#3  0x00007ffff78ec5b7 in __fortify_fail () from /lib64/libc.so.6
#4  0x00007ffff78ea740 in __chk_fail () from /lib64/libc.so.6
#5  0x00007ffff78e9be9 in __strncpy_chk () from /lib64/libc.so.6
#6  0x0000555555556e11 in strncpy (__len=<optimized out>, __src=0x55555595d860 "bluetooth-monitor", __dest=0x55555575c0b0 <interface> "bluetooth0") at /usr/include/bits/string3.h:126
#7  iterate_dev (arginterface=<optimized out>, pd=0x7fffffffdc38, linktype=0x7fffffffdc34, 
    errbuf=0x7fffffffdc50 "virbr0-nic: You don't have permission to capture on that device (socket: Operation not permitted)") at ./arpwatch.c:205
#8  0x0000555555556712 in main (argc=1, argv=0x7fffffffde78) at ./arpwatch.c:320


Expected results:
No crashes.