syzbot

executing program
BUG: memory leak
unreferenced object 0xffff88812530d380 (size 64):
  comm "syz-executor157", pid 7027, jiffies 4294948873 (age 14.160s)
  hex dump (first 32 bytes):
    23 4e 00 00 0f 86 d6 04 00 00 00 00 00 00 00 00  #N..............
    48 cd e2 24 81 88 ff ff 00 00 00 00 00 00 00 00  H..$............
  backtrace:
    [<00000000024baf51>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000024baf51>] slab_post_alloc_hook mm/slab.h:522 [inline]
    [<00000000024baf51>] slab_alloc mm/slab.c:3319 [inline]
    [<00000000024baf51>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483
    [<0000000027b55ef8>] sctp_bucket_create net/sctp/socket.c:8374 [inline]
    [<0000000027b55ef8>] sctp_get_port_local+0x189/0x5b0 net/sctp/socket.c:8121
    [<00000000191c31d9>] sctp_do_bind+0xcc/0x1e0 net/sctp/socket.c:402
    [<00000000a150b8f8>] sctp_bindx_add+0x4b/0xd0 net/sctp/socket.c:496
    [<00000000cd5e6687>] sctp_setsockopt_bindx+0x18b/0x1f0 net/sctp/socket.c:1023
    [<0000000077086a48>] sctp_setsockopt net/sctp/socket.c:4635 [inline]
    [<0000000077086a48>] sctp_setsockopt+0x924/0x2bd0 net/sctp/socket.c:4605
    [<000000005a3593aa>] sock_common_setsockopt+0x38/0x50 net/core/sock.c:3130
    [<0000000074597073>] __sys_setsockopt+0x10f/0x220 net/socket.c:2084
    [<00000000fb76dbd5>] __do_sys_setsockopt net/socket.c:2100 [inline]
    [<00000000fb76dbd5>] __se_sys_setsockopt net/socket.c:2097 [inline]
    [<00000000fb76dbd5>] __x64_sys_setsockopt+0x26/0x30 net/socket.c:2097
    [<000000007ca4e96b>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:296
    [<000000006e970357>] entry_SYSCALL_64_after_hwframe+0x44/0xa9