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BUG: KASAN: stack-out-of-bounds in ath9k_hif_usb_rx_stream drivers/net/wireless/ath/ath9k/hif_usb.c:626 [inline]
BUG: KASAN: stack-out-of-bounds in ath9k_hif_usb_rx_cb+0xe11/0xf90 drivers/net/wireless/ath/ath9k/hif_usb.c:666
Write of size 8 at addr ffff8881db209a08 by task systemd-udevd/3811

CPU: 0 PID: 3811 Comm: systemd-udevd Not tainted 5.7.0-rc6-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+0xef/0x16e lib/dump_stack.c:118
 print_address_description.constprop.0.cold+0xd3/0x415 mm/kasan/report.c:382
 __kasan_report.cold+0x37/0x7d mm/kasan/report.c:511
 kasan_report+0x33/0x50 mm/kasan/common.c:625
 ath9k_hif_usb_rx_stream drivers/net/wireless/ath/ath9k/hif_usb.c:626 [inline]
 ath9k_hif_usb_rx_cb+0xe11/0xf90 drivers/net/wireless/ath/ath9k/hif_usb.c:666
 __usb_hcd_giveback_urb+0x1f2/0x470 drivers/usb/core/hcd.c:1648
 usb_hcd_giveback_urb+0x368/0x420 drivers/usb/core/hcd.c:1713
 dummy_timer+0x125e/0x32b4 drivers/usb/gadget/udc/dummy_hcd.c:1967
 call_timer_fn+0x1ac/0x700 kernel/time/timer.c:1405
 expire_timers kernel/time/timer.c:1450 [inline]
 __run_timers kernel/time/timer.c:1774 [inline]
 __run_timers kernel/time/timer.c:1741 [inline]
 run_timer_softirq+0x5f9/0x1500 kernel/time/timer.c:1787
 __do_softirq+0x21e/0x9aa kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x178/0x1a0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:546 [inline]
 smp_apic_timer_interrupt+0x141/0x540 arch/x86/kernel/apic/apic.c:1140
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:__sanitizer_cov_trace_pc+0x22/0x50 kernel/kcov.c:187
Code: 0f 1f 84 00 00 00 00 00 65 48 8b 04 25 40 0f 02 00 65 8b 15 e8 cf c1 7e 81 e2 00 01 1f 00 48 8b 34 24 75 2b 8b 90 08 13 00 00 <83> fa 02 75 20 48 8b 88 10 13 00 00 8b 80 0c 13 00 00 48 8b 11 48
RSP: 0018:ffff8881ab8d7970 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: ffff8881c8136300 RBX: ffff8881d8eb6d23 RCX: ffffffff81f4b247
RDX: 0000000000000000 RSI: ffffffff81f4b1cb RDI: 0000000000000001
RBP: ffff8881ac930002 R08: ffff8881c8136300 R09: ffffed1038d87037
R10: ffff8881ab8d7c78 R11: ffffed1038d87036 R12: 000000000000007a
R13: 0000000000000002 R14: dffffc0000000000 R15: 00000000ffffffff
 string_nocheck+0x10b/0x220 lib/vsprintf.c:611
 string+0xe5/0xf0 lib/vsprintf.c:689
 vsnprintf+0x7d3/0x14f0 lib/vsprintf.c:2586
 sprintf+0xc0/0x100 lib/vsprintf.c:2788
 serial_show+0x6c/0xa0 drivers/usb/core/sysfs.c:142
 dev_attr_show+0x4b/0x90 drivers/base/core.c:1242
 sysfs_kf_seq_show+0x1f8/0x410 fs/sysfs/file.c:60
 seq_read+0x432/0xfd0 fs/seq_file.c:206
 kernfs_fop_read+0xe9/0x590 fs/kernfs/file.c:251
 __vfs_read+0x76/0x100 fs/read_write.c:426
 vfs_read+0x1f0/0x420 fs/read_write.c:462
 ksys_read+0x12d/0x250 fs/read_write.c:588
 do_syscall_64+0xb6/0x5a0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x7f3ad1d9c910
Code: b6 fe ff ff 48 8d 3d 0f be 08 00 48 83 ec 08 e8 06 db 01 00 66 0f 1f 44 00 00 83 3d f9 2d 2c 00 00 75 10 b8 00 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 de 9b 01 00 48 89 04 24
RSP: 002b:00007ffdaff97cb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000055cfe526b210 RCX: 00007f3ad1d9c910
RDX: 0000000000001000 RSI: 000055cfe5273320 RDI: 0000000000000007
RBP: 00007f3ad2057440 R08: 00007f3ad205b2c8 R09: 0000000000001010
R10: 000055cfe526b210 R11: 0000000000000246 R12: 0000000000001000
R13: 0000000000000d68 R14: 000055cfe5273320 R15: 00007f3ad2056900

The buggy address belongs to the page:
page:ffffea00076c8240 refcount:1 mapcount:0 mapping:0000000082c466be index:0x0
flags: 0x200000000001000(reserved)
raw: 0200000000001000 ffffea00076c8248 ffffea00076c8248 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881db209900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881db209980: 00 f1 f1 f1 f1 f1 f1 00 00 00 00 00 00 00 00 00
>ffff8881db209a00: 00 f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00
                      ^
 ffff8881db209a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881db209b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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