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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+0xd7d/0xf80 drivers/net/wireless/ath/ath9k/hif_usb.c:671
Read of size 4 at addr ffff8881c033c098 by task kworker/1:4/3214

CPU: 1 PID: 3214 Comm: kworker/1:4 Not tainted 5.9.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events request_firmware_work_func
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+0x1c/0x210 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+0xd7d/0xf80 drivers/net/wireless/ath/ath9k/hif_usb.c:671
 __usb_hcd_giveback_urb+0x32d/0x560 drivers/usb/core/hcd.c:1650
 usb_hcd_giveback_urb+0x367/0x410 drivers/usb/core/hcd.c:1716
 dummy_timer+0x11f2/0x3240 drivers/usb/gadget/udc/dummy_hcd.c:1967
 call_timer_fn+0x1ac/0x6e0 kernel/time/timer.c:1413
 expire_timers kernel/time/timer.c:1458 [inline]
 __run_timers.part.0+0x67c/0xa60 kernel/time/timer.c:1755
 __run_timers kernel/time/timer.c:1736 [inline]
 run_timer_softirq+0x80/0x120 kernel/time/timer.c:1768
 __do_softirq+0x1af/0x91c kernel/softirq.c:298
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
 </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+0x73/0x90 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:393 [inline]
 __irq_exit_rcu kernel/softirq.c:423 [inline]
 irq_exit_rcu+0x107/0x1a0 kernel/softirq.c:435
 sysvec_apic_timer_interrupt+0x43/0x90 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:85 [inline]
RIP: 0010:console_unlock+0xa99/0xcd0 kernel/printk/printk.c:2509
Code: 00 89 ee 48 c7 c7 60 10 35 87 e8 12 b9 03 00 65 ff 0d 3b 48 d8 7e e9 87 f9 ff ff e8 81 57 16 00 e8 fc f0 1b 00 ff 74 24 30 9d <e9> 20 fe ff ff e8 6d 57 16 00 48 8d 7d 08 48 89 f8 48 c1 e8 03 42
RSP: 0018:ffff8881cd0b7a18 EFLAGS: 00000293
RAX: 0000000000000e41 RBX: 0000000000000200 RCX: 0000000000000006
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8129a6d4
RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff895c85e7
R10: fffffbfff12b90bc R11: 0000000031323354 R12: ffffffff82b424e0
R13: ffffffff876fbd90 R14: 0000000000000042 R15: dffffc0000000000
 vprintk_emit+0x1b2/0x460 kernel/printk/printk.c:2029
 vprintk_func+0x8b/0x133 kernel/printk/printk_safe.c:393
 printk+0xba/0xed kernel/printk/printk.c:2078
 ath9k_htc_hw_init.cold+0x17/0x2a drivers/net/wireless/ath/ath9k/htc_hst.c:502
 ath9k_hif_usb_firmware_cb+0x274/0x530 drivers/net/wireless/ath/ath9k/hif_usb.c:1220
 request_firmware_work_func+0x126/0x250 drivers/base/firmware_loader/main.c:1001
 process_one_work+0x94c/0x15f0 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x392/0x470 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

The buggy address belongs to the page:
page:00000000fa39bdce refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1c033c
flags: 0x200000000000000()
raw: 0200000000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881c033bf80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881c033c000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881c033c080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                            ^
 ffff8881c033c100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881c033c180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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