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Detected by valgrind. Leak introduced in commit e9bd9a0: * tools/virsh.c: fix memory leak on cmdBlkdeviotune. * how to reproduce? % valgrind -v --leak-check=full virsh blkdeviotune <domain name> <block device> * actual valgrind result: ==12759== 576 bytes in 1 blocks are definitely lost in loss record 18 of 29 ==12759== at 0x4A04A28: calloc (vg_replace_malloc.c:467) ==12759== by 0x42134E: _vshCalloc.clone.2 (virsh.c:422) ==12759== by 0x4217CB: cmdBlkdeviotune (virsh.c:6364) ==12759== by 0x4136A2: vshCommandRun (virsh.c:16363) ==12759== by 0x4253FB: main (virsh.c:17865) ==12759== ==12759== LEAK SUMMARY: ==12759== definitely lost: 576 bytes in 1 blocks ==12759== indirectly lost: 0 bytes in 0 blocks ==12759== possibly lost: 0 bytes in 0 blocks ==12759== still reachable: 126,964 bytes in 1,342 blocks ==12759== suppressed: 0 bytes in 0 blocks Signed-off-by: Alex Jia <ajia@redhat.com>