netdev - Re: KASAN: use-after-free Read in ath9k_htc_rx

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Message-ID: <CAAeHK+xrjfrmzNzbVFiQJmO6gvE2nX3UGvFK1bcob1oQxgDAAA@mail.gmail.com>
Date:   Fri, 12 Jun 2020 15:03:05 +0200
From:   Andrey Konovalov <andreyknvl@...gle.com>
To:     syzbot <syzbot+666280b21749af5d36db@...kaller.appspotmail.com>
Cc:     ath9k-devel@....qualcomm.com,
        "David S. Miller" <davem@...emloft.net>,
        Kalle Valo <kvalo@...eaurora.org>,
        LKML <linux-kernel@...r.kernel.org>,
        USB list <linux-usb@...r.kernel.org>,
        linux-wireless@...r.kernel.org, netdev <netdev@...r.kernel.org>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>
Subject: Re: KASAN: use-after-free Read in ath9k_htc_rx_msg

On Thu, Mar 26, 2020 at 4:14 PM syzbot
<syzbot+666280b21749af5d36db@...kaller.appspotmail.com> wrote:
>
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit:    e17994d1 usb: core: kcov: collect coverage from usb comple..
> git tree:       https://github.com/google/kasan.git usb-fuzzer
> console output: https://syzkaller.appspot.com/x/log.txt?x=113938c5e00000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=5d64370c438bc60
> dashboard link: https://syzkaller.appspot.com/bug?extid=666280b21749af5d36db
> compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13fdc1e5e00000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1507178de00000
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+666280b21749af5d36db@...kaller.appspotmail.com
>
> ==================================================================
> BUG: KASAN: use-after-free in __wake_up_common+0x634/0x650 kernel/sched/wait.c:86
> Read of size 8 at addr ffff8881cec10000 by task swapper/1/0
>
> CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.6.0-rc5-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
>  __wake_up_common+0x634/0x650 kernel/sched/wait.c:86
>  complete+0x51/0x70 kernel/sched/completion.c:36
>  htc_process_conn_rsp drivers/net/wireless/ath/ath9k/htc_hst.c:138 [inline]
>  ath9k_htc_rx_msg+0x7c2/0xaf0 drivers/net/wireless/ath/ath9k/htc_hst.c:443
>  ath9k_hif_usb_reg_in_cb+0x1ba/0x630 drivers/net/wireless/ath/ath9k/hif_usb.c:718
>  __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+0x1258/0x32ae drivers/usb/gadget/udc/dummy_hcd.c:1966
>
>
> ---
> 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@...glegroups.com.
>
> syzbot will keep track of this bug report. See:
> https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
> syzbot can test patches for this bug, for details see:
> https://goo.gl/tpsmEJ#testing-patches

#syz dup: KASAN: use-after-free Write in ath9k_htc_rx_msg