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Detected by valgrind. Leak introduced in commit dc675f3: * tools/virsh.c: fix memory leak on cmdDomIfGetLink. * how to reproduce? % valgrind -v --leak-check=full virsh domif-getlink <domain name> 0 * actual valgrind result: ==13102== 18 bytes in 1 blocks are definitely lost in loss record 9 of 47 ==13102== at 0x4A05FDE: malloc (vg_replace_malloc.c:236) ==13102== by 0x322A6A67DD: xmlStrndup (in /usr/lib64/libxml2.so.2.7.6) ==13102== by 0x414892: cmdDomIfGetLink (virsh.c:1538) ==13102== by 0x4136A2: vshCommandRun (virsh.c:16363) ==13102== by 0x4253FB: main (virsh.c:17865) ==13102== ==13102== LEAK SUMMARY: ==13102== definitely lost: 18 bytes in 1 blocks ==13102== indirectly lost: 0 bytes in 0 blocks ==13102== possibly lost: 0 bytes in 0 blocks ==13102== still reachable: 127,888 bytes in 1,361 blocks ==13102== suppressed: 0 bytes in 0 blocks Signed-off-by: Alex Jia <ajia@redhat.com>