BUG: memory leak
unreferenced object 0xffff888121223140 (size 32):
  comm "syz-executor547", pid 7035, jiffies 4294941983 (age 7.910s)
  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:
    [<00000000230081af>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000230081af>] slab_post_alloc_hook mm/slab.h:522 [inline]
    [<00000000230081af>] slab_alloc mm/slab.c:3319 [inline]
    [<00000000230081af>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
    [<000000005a47a00b>] kmalloc include/linux/slab.h:552 [inline]
    [<000000005a47a00b>] kzalloc include/linux/slab.h:748 [inline]
    [<000000005a47a00b>] ip_mc_add1_src net/ipv4/igmp.c:1973 [inline]
    [<000000005a47a00b>] ip_mc_add_src+0x36b/0x400 net/ipv4/igmp.c:2097
    [<000000008774c550>] ip_mc_source+0x2e3/0x4e0 net/ipv4/igmp.c:2418
    [<000000004f2f5e13>] do_ip_setsockopt.isra.0+0x24e/0x1930 net/ipv4/ip_sockglue.c:998
    [<00000000a2a59c93>] ip_setsockopt+0x3b/0xb0 net/ipv4/ip_sockglue.c:1248
    [<00000000ab465a3d>] tcp_setsockopt net/ipv4/tcp.c:3133 [inline]
    [<00000000ab465a3d>] tcp_setsockopt+0x46/0x80 net/ipv4/tcp.c:3127
    [<000000006b772b92>] sock_common_setsockopt+0x38/0x50 net/core/sock.c:3130
    [<000000005ee0f186>] __sys_setsockopt+0x10f/0x220 net/socket.c:2084
    [<00000000f0720539>] __do_sys_setsockopt net/socket.c:2100 [inline]
    [<00000000f0720539>] __se_sys_setsockopt net/socket.c:2097 [inline]
    [<00000000f0720539>] __x64_sys_setsockopt+0x26/0x30 net/socket.c:2097
    [<00000000b149e4ab>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:296
    [<00000000501891f4>] entry_SYSCALL_64_after_hwframe+0x44/0xa9