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Date:   Fri, 15 Nov 2019 09:51:24 -0800
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Subject: Re: Re: INFO: task hung in chaoskey_disconnect
From:   syzbot <syzbot+f41c4f7c6d8b0b778780@syzkaller.appspotmail.com>
To:     Stephen Boyd <swboyd@chromium.org>
Cc:     alexandre.belloni@bootlin.com, andreyknvl@google.com,
        arnd@arndb.de, b.zolnierkie@samsung.com,
        gregkh@linuxfoundation.org, herbert@gondor.apana.org.au,
        linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-usb@vger.kernel.org, lvivier@redhat.com, mchehab@kernel.org,
        mpm@selenic.com, swboyd@chromium.org,
        syzkaller-bugs@googlegroups.com
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> Quoting syzbot (2019-11-06 04:32:09)
>> Hello,

>> syzbot found the following crash on:

>> HEAD commit:    b1aa9d83 usb: raw: add raw-gadget interface
>> git tree:       https://github.com/google/kasan.git usb-fuzzer
>> console output: https://syzkaller.appspot.com/x/log.txt?x=16ae2adce00000
>> kernel config:   
>> https://syzkaller.appspot.com/x/.config?x=79de80330003b5f7
>> dashboard link:  
>> https://syzkaller.appspot.com/bug?extid=f41c4f7c6d8b0b778780
>> compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
>> syz repro:       
>> https://syzkaller.appspot.com/x/repro.syz?x=10248158e00000
>> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16afbf7ce00000

>> IMPORTANT: if you fix the bug, please add the following tag to the  
>> commit:
>> Reported-by: syzbot+f41c4f7c6d8b0b778780@syzkaller.appspotmail.com

> I suspect this is because of the kthread getting stuck problem reported
> by Maciej. Maybe try the commit that Herbert picked up.

> #syz test:  
> git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6.git linus

Bugs found by USB fuzzer can only be tested on  
https://github.com/google/kasan.git tree,
usb-fuzzer branch because USB fuzzer is not upstreamed yet.
See https://goo.gl/tpsmEJ#usb-fuzzer for details.