perf_event_open(&(0x7f0000000280)={0x1, 0x80, 0x0, 0x0, 0x0, 0x0, 0x0, 0x2, 0xa0014, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_config_ext}, 0x0, 0xffffffffffffffff, 0xffffffffffffffff, 0x0)
sendfile(r0, r0, 0x0, 0x100000)
BUG: memory leak
unreferenced object 0xffff88804621cc00 (size 512):
  comm "softirq", pid 0, jiffies 4297041655 (age 25.310s)
  hex dump (first 32 bytes):
    00 a5 37 18 80 88 ff ff d0 19 00 00 6d 01 c0 f4  ..7.........m...
    ff ff ff ff 00 00 00 00 ff ff ff ff ff ff ff ff  ................
  backtrace:
    [<00000000dc990cb2>] __alloc_skb+0xe3/0x340
    [<00000000691e46eb>] __napi_alloc_skb+0x74/0x300
    [<00000000bbfe9171>] e1000_clean_rx_irq+0x803/0x11a0
    [<000000004580a8ca>] e1000_clean+0x96d/0x1c60
    [<00000000382eade4>] __napi_poll+0xb9/0x690
    [<00000000fd5b21ba>] net_rx_action+0x9ca/0xd10
    [<000000003115b7b2>] __do_softirq+0x270/0x8c7
    [<0000000077d0c4b1>] __irq_exit_rcu+0x113/0x170
    [<0000000016867fcc>] irq_exit_rcu+0x5/0x20
    [<000000004299659a>] common_interrupt+0xa4/0xc0
    [<000000009cfd6e0d>] asm_common_interrupt+0x1e/0x40
    [<000000002280e10e>] _raw_spin_unlock_irqrestore+0x2e/0x50
    [<00000000e2bcba49>] find_and_remove_object+0xe4/0x120
    [<000000002af2ef12>] kmemleak_free+0x1f/0x30
    [<00000000cc836c63>] kmem_cache_free_bulk+0x381/0xb60
    [<000000001bdd8db5>] kfree_rcu_work+0x3fa/0xbd0

BUG: leak checking failed