ECDSA) to the list of known hosts.
executing program
executing program
executing program
executing program
BUG: memory leak
unreferenced object 0xffff888121bf5340 (size 64):
  comm "softirq", pid 0, jiffies 4294948293 (age 20.220s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 ac 1e 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000ce101539>] kmemleak_alloc_recursive include/linux/kmemleak.h:55 [inline]
    [<00000000ce101539>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<00000000ce101539>] slab_alloc mm/slab.c:3326 [inline]
    [<00000000ce101539>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553
    [<00000000fb17a229>] kmalloc include/linux/slab.h:547 [inline]
    [<00000000fb17a229>] kzalloc include/linux/slab.h:742 [inline]
    [<00000000fb17a229>] ip_mc_add1_src net/ipv4/igmp.c:1961 [inline]
    [<00000000fb17a229>] ip_mc_add_src+0x36b/0x400 net/ipv4/igmp.c:2085
    [<00000000e9d09f5a>] ip_mc_source+0x2e3/0x4e0 net/ipv4/igmp.c:2412
    [<00000000956a8616>] do_ip_setsockopt.isra.0+0x67b/0x1930 net/ipv4/ip_sockglue.c:1074
    [<00000000d1dec022>] ip_setsockopt+0x3b/0xb0 net/ipv4/ip_sockglue.c:1246
    [<000000006ce8d8b4>] udp_setsockopt+0x4e/0x90 net/ipv4/udp.c:2616
    [<000000004f2096e1>] sock_common_setsockopt+0x38/0x50 net/core/sock.c:3130
    [<00000000dd9f4a1a>] __sys_setsockopt+0x98/0x120 net/socket.c:2078
    [<000000006436ddfd>] __do_sys_setsockopt net/socket.c:2089 [inline]
    [<000000006436ddfd>] __se_sys_setsockopt net/socket.c:2086 [inline]
    [<000000006436ddfd>] __x64_sys_setsockopt+0x26/0x30 net/socket.c:2086
    [<00000000dcd4604d>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301
    [<00000000147921dd>] entry_SYSCALL_64_after_hwframe+0x44/0xa9