BUG: memory leak
unreferenced object 0xffff888110586800 (size 2048):
  comm "softirq", pid 0, jiffies 4294949136 (age 14.540s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    06 00 07 40 00 00 00 00 00 00 00 00 00 00 00 00  ...@............
  backtrace:
    [<000000009e393f61>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<000000009e393f61>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<000000009e393f61>] slab_alloc mm/slab.c:3319 [inline]
    [<000000009e393f61>] __do_kmalloc mm/slab.c:3653 [inline]
    [<000000009e393f61>] __kmalloc+0x169/0x300 mm/slab.c:3664
    [<00000000a3358083>] kmalloc include/linux/slab.h:561 [inline]
    [<00000000a3358083>] sk_prot_alloc+0x112/0x170 net/core/sock.c:1603
    [<0000000056cd173f>] sk_alloc+0x35/0x2f0 net/core/sock.c:1657
    [<00000000fdcd5c64>] nr_make_new net/netrom/af_netrom.c:476 [inline]
    [<00000000fdcd5c64>] nr_rx_frame+0x339/0x8f0 net/netrom/af_netrom.c:959
    [<000000006edbdb8d>] nr_loopback_timer+0x4e/0xd0 net/netrom/nr_loopback.c:59
    [<00000000a73e28df>] call_timer_fn+0x45/0x1e0 kernel/time/timer.c:1404
    [<0000000057bebdf3>] expire_timers kernel/time/timer.c:1449 [inline]
    [<0000000057bebdf3>] __run_timers kernel/time/timer.c:1773 [inline]
    [<0000000057bebdf3>] __run_timers kernel/time/timer.c:1740 [inline]
    [<0000000057bebdf3>] run_timer_softirq+0x262/0x730 kernel/time/timer.c:1786
    [<00000000d8c15b5f>] __do_softirq+0x115/0x33f kernel/softirq.c:292
    [<00000000f13870cb>] invoke_softirq kernel/softirq.c:373 [inline]
    [<00000000f13870cb>] irq_exit+0xbb/0xe0 kernel/softirq.c:413
    [<00000000f8308b46>] exiting_irq arch/x86/include/asm/apic.h:536 [inline]
    [<00000000f8308b46>] smp_apic_timer_interrupt+0x96/0x190 arch/x86/kernel/apic/apic.c:1137
    [<000000002a32f645>] apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
    [<000000006742eb90>] arch_local_irq_restore arch/x86/include/asm/paravirt.h:756 [inline]
    [<000000006742eb90>] console_unlock.part.0+0x5f0/0x6d0 kernel/printk/printk.c:2481
    [<00000000d38c004c>] console_unlock kernel/printk/printk.c:2374 [inline]
    [<00000000d38c004c>] vprintk_emit+0x251/0x360 kernel/printk/printk.c:1996
    [<000000001278b971>] vprintk_default+0x28/0x30 kernel/printk/printk.c:2023
    [<000000003a164eeb>] vprintk_func+0x59/0xfa kernel/printk/printk_safe.c:386
    [<00000000fb61418e>] printk+0x60/0x7d kernel/printk/printk.c:2056