BUG: memory leak
unreferenced object 0xffff88803c6cb000 (size 96):
  comm "softirq", pid 0, jiffies 4296821615 (age 26.902s)
  hex dump (first 32 bytes):
    01 00 00 00 00 01 02 ff 01 00 00 00 00 00 00 00  ................
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff  ................
  backtrace:
    [<000000000d93b70c>] __skb_ext_alloc+0x19/0x80 net/core/skbuff.c:6224
    [<00000000336ac9d2>] skb_ext_add+0x504/0x670 net/core/skbuff.c:6319
    [<0000000004806fed>] skb_set_kcov_handle include/linux/skbuff.h:4622 [inline]
    [<0000000004806fed>] skb_set_kcov_handle include/linux/skbuff.h:4612 [inline]
    [<0000000004806fed>] __alloc_skb+0x3c1/0x620 net/core/skbuff.c:253
    [<00000000cc6dd947>] skb_copy+0x137/0x2f0 net/core/skbuff.c:1522
    [<0000000042b9a8c5>] mac80211_hwsim_tx_frame_no_nl.isra.0+0xb1d/0x13c0 drivers/net/wireless/mac80211_hwsim.c:1495
    [<00000000bc583a44>] mac80211_hwsim_tx_frame+0x152/0x1e0 drivers/net/wireless/mac80211_hwsim.c:1712
    [<0000000079b9175d>] mac80211_hwsim_beacon_tx+0x494/0x8f0 drivers/net/wireless/mac80211_hwsim.c:1766
    [<0000000027247cc4>] __iterate_interfaces+0x1f0/0x530 net/mac80211/util.c:792
    [<0000000020d9000d>] ieee80211_iterate_active_interfaces_atomic+0x72/0x180 net/mac80211/util.c:828
    [<00000000c4f8b0a0>] mac80211_hwsim_beacon+0xcd/0x1c0 drivers/net/wireless/mac80211_hwsim.c:1789
    [<00000000fc8d87d8>] __run_hrtimer kernel/time/hrtimer.c:1583 [inline]
    [<00000000fc8d87d8>] __hrtimer_run_queues+0x5e8/0xb50 kernel/time/hrtimer.c:1647
    [<000000000b077490>] hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1664
    [<0000000070026487>] __do_softirq+0x1b8/0x867 kernel/softirq.c:298
    [<0000000029a5f8be>] asm_call_irq_on_stack+0x12/0x20
    [<000000002d5f5a63>] __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
    [<000000002d5f5a63>] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
    [<000000002d5f5a63>] do_softirq_own_stack+0x80/0xa0 arch/x86/kernel/irq_64.c:77
    [<000000007e8b3c98>] invoke_softirq kernel/softirq.c:393 [inline]
    [<000000007e8b3c98>] __irq_exit_rcu kernel/softirq.c:423 [inline]
    [<000000007e8b3c98>] irq_exit_rcu+0x110/0x1a0 kernel/softirq.c:435

BUG: leak checking failed