MemoryLeak in Glusterfs

[SecTechTool]

Description of problem: MemoryLeak happens when executing command gluster volume status all detail.

The exact command to reproduce the issue:

1. setup a 10-node testing network.
2. remove some nodes in the network by command gluster delete probe IP .
3. check gluster volume status by command gluster volume status all detail.

The full output of the command that failed:

root@gluster1:~# gluster volume status all detail
Status of volume: grid-fuzz
------------------------------------------------------------------------------
Brick                : Brick 192.168.4.251:/data/brick1
TCP Port             : N/A                 
RDMA Port            : N/A                 
Online               : N                   
Pid                  : N/A                 
File System          : xfs                 
Device               : /dev/mapper/ubuntu--vg-sda5
Mount Options        : rw,relatime,attr2,inode64,logbufs=8,logbsize=32k,noquota
Inode Size           : 512                 
Disk Space Free      : 392.2GB             
Total Disk Space     : 397.8GB             
Inode Count          : 208664576           
Free Inodes          : 208658696           
------------------------------------------------------------------------------
Brick                : Brick 192.168.4.253:/data/brick1
TCP Port             : N/A                 
RDMA Port            : N/A                 
Online               : N                   
Pid                  : N/A                 
File System          : xfs                 
Device               : /dev/mapper/ubuntu--vg-sda5
Mount Options        : rw,relatime,attr2,inode64,logbufs=8,logbsize=32k,noquota
Inode Size           : 512                 
Disk Space Free      : 391.8GB             
Total Disk Space     : 397.8GB             
Inode Count          : 208664576           
Free Inodes          : 208658801           
 

=================================================================
==2756==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 72 byte(s) in 2 object(s) allocated from:
    #0 0x7fc419596887 in __interceptor_malloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:145
    #1 0x7fc41926812a in __gf_malloc (/usr/local/lib/libglusterfs.so.0+0x11212a)
    #2 0x7fc4192684d4 in gf_vasprintf (/usr/local/lib/libglusterfs.so.0+0x1124d4)
    #3 0x7fc4192686fc in gf_asprintf (/usr/local/lib/libglusterfs.so.0+0x1126fc)
    #4 0x7fc4191fa766 in gf_uint64_2human_readable (/usr/local/lib/libglusterfs.so.0+0xa4766)
    #5 0x56022a5e189f in cli_get_detail_status (/usr/local/sbin/gluster+0x5d89f)
    #6 0x56022a6220d2 in gf_cli_status_cbk (/usr/local/sbin/gluster+0x9e0d2)
    #7 0x7fc41900ac01 in rpc_clnt_handle_reply (/usr/local/lib/libgfrpc.so.0+0x2fc01)
    #8 0x7fc41900b584 in rpc_clnt_notify (/usr/local/lib/libgfrpc.so.0+0x30584)
    #9 0x7fc419001f2d in rpc_transport_notify (/usr/local/lib/libgfrpc.so.0+0x26f2d)
    #10 0x7fc4135cf07a in socket_event_poll_in_async (/usr/local/lib/glusterfs/12dev/rpc-transport/socket.so+0x2107a)
    #11 0x7fc4135bbed4 in gf_async (/usr/local/lib/glusterfs/12dev/rpc-transport/socket.so+0xded4)
    #12 0x7fc4135cf4cd in socket_event_poll_in (/usr/local/lib/glusterfs/12dev/rpc-transport/socket.so+0x214cd)
    #13 0x7fc4135d18ee in socket_event_handler (/usr/local/lib/glusterfs/12dev/rpc-transport/socket.so+0x238ee)
    #14 0x7fc419306661 in event_dispatch_epoll_handler (/usr/local/lib/libglusterfs.so.0+0x1b0661)
    #15 0x7fc4193072d9 in event_dispatch_epoll_worker (/usr/local/lib/libglusterfs.so.0+0x1b12d9)
    #16 0x7fc4185f1ac2  (/lib/x86_64-linux-gnu/libc.so.6+0x94ac2)

Direct leak of 72 byte(s) in 2 object(s) allocated from:
    #0 0x7fc419596887 in __interceptor_malloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:145
    #1 0x7fc41926812a in __gf_malloc (/usr/local/lib/libglusterfs.so.0+0x11212a)
    #2 0x7fc4192684d4 in gf_vasprintf (/usr/local/lib/libglusterfs.so.0+0x1124d4)
    #3 0x7fc4192686fc in gf_asprintf (/usr/local/lib/libglusterfs.so.0+0x1126fc)
    #4 0x7fc4191fa766 in gf_uint64_2human_readable (/usr/local/lib/libglusterfs.so.0+0xa4766)
    #5 0x56022a5e17d7 in cli_get_detail_status (/usr/local/sbin/gluster+0x5d7d7)
    #6 0x56022a6220d2 in gf_cli_status_cbk (/usr/local/sbin/gluster+0x9e0d2)
    #7 0x7fc41900ac01 in rpc_clnt_handle_reply (/usr/local/lib/libgfrpc.so.0+0x2fc01)
    #8 0x7fc41900b584 in rpc_clnt_notify (/usr/local/lib/libgfrpc.so.0+0x30584)
    #9 0x7fc419001f2d in rpc_transport_notify (/usr/local/lib/libgfrpc.so.0+0x26f2d)
    #10 0x7fc4135cf07a in socket_event_poll_in_async (/usr/local/lib/glusterfs/12dev/rpc-transport/socket.so+0x2107a)
    #11 0x7fc4135bbed4 in gf_async (/usr/local/lib/glusterfs/12dev/rpc-transport/socket.so+0xded4)
    #12 0x7fc4135cf4cd in socket_event_poll_in (/usr/local/lib/glusterfs/12dev/rpc-transport/socket.so+0x214cd)
    #13 0x7fc4135d18ee in socket_event_handler (/usr/local/lib/glusterfs/12dev/rpc-transport/socket.so+0x238ee)
    #14 0x7fc419306661 in event_dispatch_epoll_handler (/usr/local/lib/libglusterfs.so.0+0x1b0661)
    #15 0x7fc4193072d9 in event_dispatch_epoll_worker (/usr/local/lib/libglusterfs.so.0+0x1b12d9)
    #16 0x7fc4185f1ac2  (/lib/x86_64-linux-gnu/libc.so.6+0x94ac2)

SUMMARY: AddressSanitizer: 144 byte(s) leaked in 4 allocation(s).

Expected results: Volume detail info