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BUG: KASAN: use-after-free in ath9k_hif_usb_rx_stream drivers/net/wireless/ath/ath9k/hif_usb.c:627 [inline]
BUG: KASAN: use-after-free in ath9k_hif_usb_rx_cb+0xdb4/0x1050 drivers/net/wireless/ath/ath9k/hif_usb.c:671
Read of size 4 at addr ffff8881cd34c090 by task swapper/1/0

CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xf6/0x16e lib/dump_stack.c:118
 print_address_description.constprop.0.cold+0xd3/0x415 mm/kasan/report.c:383
 __kasan_report mm/kasan/report.c:513 [inline]
 kasan_report.cold+0x37/0x7c mm/kasan/report.c:530
 ath9k_hif_usb_rx_stream drivers/net/wireless/ath/ath9k/hif_usb.c:627 [inline]
 ath9k_hif_usb_rx_cb+0xdb4/0x1050 drivers/net/wireless/ath/ath9k/hif_usb.c:671
 __usb_hcd_giveback_urb+0x29a/0x550 drivers/usb/core/hcd.c:1650
 usb_hcd_giveback_urb+0x368/0x420 drivers/usb/core/hcd.c:1716
 dummy_timer+0x125e/0x32b4 drivers/usb/gadget/udc/dummy_hcd.c:1967
 call_timer_fn+0x1ac/0x6e0 kernel/time/timer.c:1404
 expire_timers kernel/time/timer.c:1449 [inline]
 __run_timers kernel/time/timer.c:1773 [inline]
 __run_timers kernel/time/timer.c:1740 [inline]
 run_timer_softirq+0x5e5/0x14c0 kernel/time/timer.c:1786
 __do_softirq+0x21e/0x996 kernel/softirq.c:292
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x109/0x140 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:387 [inline]
 __irq_exit_rcu kernel/softirq.c:417 [inline]
 irq_exit_rcu+0x16f/0x1a0 kernel/softirq.c:429
 sysvec_apic_timer_interrupt+0xd3/0x1b0 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:596
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:49 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:89 [inline]
RIP: 0010:acpi_safe_halt drivers/acpi/processor_idle.c:112 [inline]
RIP: 0010:acpi_safe_halt+0x72/0x90 drivers/acpi/processor_idle.c:108
Code: 74 06 5b e9 c0 32 9f fb e8 bb 32 9f fb e8 c6 96 a4 fb e9 0c 00 00 00 e8 ac 32 9f fb 0f 00 2d 45 6e 84 00 e8 a0 32 9f fb fb f4 <fa> e8 b8 94 a4 fb 5b e9 92 32 9f fb 48 89 df e8 7a e1 c8 fb eb ab
RSP: 0018:ffff8881da22fc60 EFLAGS: 00000293
RAX: ffff8881da213200 RBX: 0000000000000000 RCX: 1ffffffff1014efa
RDX: 0000000000000000 RSI: ffffffff85a03aa0 RDI: ffff8881da213a38
RBP: ffff8881d8ccb064 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881d8ccb064
R13: 1ffff1103b445f96 R14: ffff8881d8ccb065 R15: 0000000000000001
 acpi_idle_do_entry+0xa9/0xe0 drivers/acpi/processor_idle.c:525
 acpi_idle_enter+0x42b/0xac0 drivers/acpi/processor_idle.c:651
 cpuidle_enter_state+0xdb/0xc20 drivers/cpuidle/cpuidle.c:234
 cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:345
 call_cpuidle kernel/sched/idle.c:117 [inline]
 cpuidle_idle_call kernel/sched/idle.c:207 [inline]
 do_idle+0x3c2/0x500 kernel/sched/idle.c:269
 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:365
 start_secondary+0x294/0x370 arch/x86/kernel/smpboot.c:268
 secondary_startup_64+0xb6/0xc0 arch/x86/kernel/head_64.S:243

The buggy address belongs to the page:
page:ffffea000734d300 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x200000000000000()
raw: 0200000000000000 0000000000000000 ffffea000734d308 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881cd34bf80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881cd34c000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881cd34c080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                         ^
 ffff8881cd34c100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881cd34c180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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