BUG: memory leak
unreferenced object 0xffff888115f06900 (size 32):
  comm "syz-executor.0", pid 8640, jiffies 4295045188 (age 13.230s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff839bb5d8>] kmalloc include/linux/slab.h:554 [inline]
    [<ffffffff839bb5d8>] kzalloc include/linux/slab.h:684 [inline]
    [<ffffffff839bb5d8>] ip_mc_add1_src net/ipv4/igmp.c:1971 [inline]
    [<ffffffff839bb5d8>] ip_mc_add_src+0x348/0x450 net/ipv4/igmp.c:2095
    [<ffffffff839be724>] ip_mc_source+0x3d4/0x610 net/ipv4/igmp.c:2416
    [<ffffffff8394e798>] do_ip_setsockopt net/ipv4/ip_sockglue.c:1294 [inline]
    [<ffffffff8394e798>] ip_setsockopt+0x15d8/0x1f70 net/ipv4/ip_sockglue.c:1423
    [<ffffffff839623f0>] tcp_setsockopt+0x70/0x1420 net/ipv4/tcp.c:3643
    [<ffffffff8363e430>] __sys_setsockopt+0x1b0/0x360 net/socket.c:2117
    [<ffffffff8363e602>] __do_sys_setsockopt net/socket.c:2128 [inline]
    [<ffffffff8363e602>] __se_sys_setsockopt net/socket.c:2125 [inline]
    [<ffffffff8363e602>] __x64_sys_setsockopt+0x22/0x30 net/socket.c:2125
    [<ffffffff842ded2d>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
    [<ffffffff84400068>] entry_SYSCALL_64_after_hwframe+0x44/0xae