BUG: memory leak
unreferenced object 0xffff8881142318a0 (size 32):
  comm "syz-executor496", pid 8674, jiffies 4294966335 (age 12.680s)
  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 02 00  ................
  backtrace:
    [<00000000dfde2466>] kmalloc include/linux/slab.h:552 [inline]
    [<00000000dfde2466>] kzalloc include/linux/slab.h:682 [inline]
    [<00000000dfde2466>] ip_mc_add1_src net/ipv4/igmp.c:1971 [inline]
    [<00000000dfde2466>] ip_mc_add_src+0x348/0x450 net/ipv4/igmp.c:2095
    [<000000001500f0b5>] ip_mc_source+0x3d4/0x610 net/ipv4/igmp.c:2416
    [<00000000249e19a1>] do_ip_setsockopt net/ipv4/ip_sockglue.c:1294 [inline]
    [<00000000249e19a1>] ip_setsockopt+0x15d8/0x1f70 net/ipv4/ip_sockglue.c:1423
    [<0000000033aa0705>] tcp_setsockopt+0x70/0x13f0 net/ipv4/tcp.c:3598
    [<000000008f06fdea>] __sys_setsockopt+0x1b0/0x360 net/socket.c:2115
    [<000000004e537db5>] __do_sys_setsockopt net/socket.c:2126 [inline]
    [<000000004e537db5>] __se_sys_setsockopt net/socket.c:2123 [inline]
    [<000000004e537db5>] __x64_sys_setsockopt+0x22/0x30 net/socket.c:2123
    [<00000000ea9d98fb>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
    [<000000001713cafe>] entry_SYSCALL_64_after_hwframe+0x44/0xa9