# Memory leak in ifconfig ## Description
Memory leak in ifconfig **version** ``` ./ifconfig --version ifconfig (GNU inetutils) 2.2.16-cf091 Copyright (C) 2021 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later < https://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Written by Marcus Brinkmann. ``` **System information** Ubuntu 20.04 focal, AMD EPYC 7742 64-Core @ 16x 2.25GHz **Result** ``` ./ifconfig docker0 Link encap:Ethernet HWaddr 02:42:0F:3F:D1:8C inet addr:172.17.0.1 Bcast:172.17.255.255 Mask:255.255.0.0 UP BROADCAST MULTICAST MTU:1500 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 TX bytes:0 ens160 Link encap:Ethernet HWaddr 00:0C:29:E5:38:0E inet addr:192.168.155.5 Bcast:192.168.155.255 Mask:255.255.254.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:7327 errors:0 dropped:0 overruns:0 frame:0 TX packets:6372 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:844586 TX bytes:2386960 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:3092 errors:0 dropped:0 overruns:0 frame:0 TX packets:3092 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:1598123 TX bytes:1598123 ================================================================= ==7524==ERROR: LeakSanitizer: detected memory leaks Direct leak of 64 byte(s) in 1 object(s) allocated from: #0 0x494bdd in malloc (/root/disk2/fuzzing/inetutils/fuzz/bin/ifconfig+0x494bdd) #1 0x4e0330 in linux_if_nameindex /root/disk2/fuzzing/inetutils/inetutils/ifconfig/./system/linux.c:948:11 #2 0x4cbfd5 in parse_cmdline /root/disk2/fuzzing/inetutils/inetutils/ifconfig/options.c:678:22 #3 0x4c432c in main /root/disk2/fuzzing/inetutils/inetutils/ifconfig/ifconfig.c:56:3 SUMMARY: AddressSanitizer: 64 byte(s) leaked in 1 allocation(s). ```
