Re: KASAN: stack-out-of-bounds Write in ath9k_hif_usb_rx_cb

[Qiujun Huang]

#syz test: https://github.com/google/kasan.git usb-fuzzer

On Tue, Mar 31, 2020 at 2:21 AM syzbot
<syzbot+d403396d4df67ad0bd5f@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit:    0fa84af8 Merge tag 'usb-serial-5.7-rc1' of https://git.ker..
> git tree:       https://github.com/google/kasan.git usb-fuzzer
> console output: https://syzkaller.appspot.com/x/log.txt?x=159a0583e00000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=a782c087b1f425c6
> dashboard link: https://syzkaller.appspot.com/bug?extid=d403396d4df67ad0bd5f
> compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=177a266de00000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1579f947e00000
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+d403396d4df67ad0bd5f@xxxxxxxxxxxxxxxxxxxxxxxxx
>
> ==================================================================
> 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+0xdf6/0xf70 drivers/net/wireless/ath/ath9k/hif_usb.c:666
> Write of size 8 at addr ffff8881db309a28 by task swapper/1/0
>
> CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.6.0-rc7-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+0xd3/0x314 mm/kasan/report.c:374
>  __kasan_report.cold+0x37/0x77 mm/kasan/report.c:506
>  kasan_report+0xe/0x20 mm/kasan/common.c:641
>  ath9k_hif_usb_rx_stream drivers/net/wireless/ath/ath9k/hif_usb.c:626 [inline]
>  ath9k_hif_usb_rx_cb+0xdf6/0xf70 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+0x1258/0x32ae drivers/usb/gadget/udc/dummy_hcd.c:1966
>  call_timer_fn+0x195/0x6f0 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+0x5f9/0x1500 kernel/time/timer.c:1786
>
>
> ---
> This bug is generated by a bot. It may contain errors.
> See https://goo.gl/tpsmEJ for more information about syzbot.
> syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxxx
>
> syzbot will keep track of this bug report. See:
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> syzbot can test patches for this bug, for details see:
> https://goo.gl/tpsmEJ#testing-patches

Attachment: hif_usb.patch
Description: Binary data