linux-kernel - Re: [syzbot] WARNING in vmk80xx_auto_attach/usb_submit

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Message-ID: <YMRbTj2RAbIFZKw6@kroah.com>
Date:   Sat, 12 Jun 2021 08:59:26 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     syzbot <syzbot+5f29dc6a889fc42bd896@...kaller.appspotmail.com>
Cc:     johan@...nel.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org, mathias.nyman@...ux.intel.com,
        syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] WARNING in vmk80xx_auto_attach/usb_submit_urb

On Fri, Jun 11, 2021 at 01:02:23PM -0700, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    614124be Linux 5.13-rc5
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=12188667d00000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=547a5e42ca601229
> dashboard link: https://syzkaller.appspot.com/bug?extid=5f29dc6a889fc42bd896
> compiler:       Debian clang version 11.0.1-2
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1687ec3fd00000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=172f44ffd00000
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+5f29dc6a889fc42bd896@...kaller.appspotmail.com
> 
> usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
> usb 1-1: config 0 descriptor??
> ------------[ cut here ]------------
> usb 1-1: BOGUS urb xfer, pipe 1 != type 3
> WARNING: CPU: 1 PID: 20 at drivers/usb/core/urb.c:494 usb_submit_urb+0xacd/0x1550 drivers/usb/core/urb.c:493

Looks correct to me, you did not create a valid USB device for the
system to use :)