BUG: memory leak
unreferenced object 0xffff88812516ea00 (size 512):
  comm "kworker/u4:4", pid 2582, jiffies 4294942958 (age 7.830s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 08 ea 16 25 81 88 ff ff  ...........%....
    08 ea 16 25 81 88 ff ff 18 ea 16 25 81 88 ff ff  ...%.......%....
  backtrace:
    [<00000000054176c4>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000054176c4>] slab_post_alloc_hook mm/slab.h:522 [inline]
    [<00000000054176c4>] slab_alloc mm/slab.c:3319 [inline]
    [<00000000054176c4>] __do_kmalloc mm/slab.c:3653 [inline]
    [<00000000054176c4>] __kmalloc+0x169/0x300 mm/slab.c:3664
    [<00000000776ed1cb>] kmalloc include/linux/slab.h:557 [inline]
    [<00000000776ed1cb>] kzalloc include/linux/slab.h:748 [inline]
    [<00000000776ed1cb>] rds_message_alloc+0x3e/0xc0 net/rds/message.c:291
    [<00000000314f5946>] rds_send_probe.constprop.0+0x42/0x380 net/rds/send.c:1419
    [<00000000075ff21a>] rds_send_pong+0x1e/0x23 net/rds/send.c:1482
    [<00000000716b37ae>] rds_recv_incoming+0x46c/0x570 net/rds/recv.c:343
    [<00000000d951349a>] rds_loop_xmit+0x86/0x100 net/rds/loop.c:96
    [<000000005047ca83>] rds_send_xmit+0x55d/0xa50 net/rds/send.c:355
    [<00000000b3449726>] rds_send_worker+0x3c/0x150 net/rds/threads.c:200
    [<0000000007ec1777>] process_one_work+0x210/0x490 kernel/workqueue.c:2269
    [<000000008949d75c>] worker_thread+0x56/0x4c0 kernel/workqueue.c:2415
    [<00000000fd2303d2>] kthread+0x13e/0x160 kernel/kthread.c:255
    [<00000000060d1fcb>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352