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From: Oliver Neukum <oneukum@suse.com>
To: Hui Peng <benquike@gmail.com>, Andrey Konovalov <andreyknvl@google.com>
Cc: "David S. Miller" <davem@davemloft.net>,
	syzkaller-bugs <syzkaller-bugs@googlegroups.com>,
	alexios.zavras@intel.com, Thomas Gleixner <tglx@linutronix.de>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Mathias Payer <mathias.payer@nebelwelt.net>,
	Stephen Hemminger <stephen@networkplumber.org>,
	rfontana@redhat.com,
	syzbot+44d53c7255bb1aea22d2@syzkaller.appspotmail.com,
	LKML <linux-kernel@vger.kernel.org>,
	USB list <linux-usb@vger.kernel.org>,
	netdev <netdev@vger.kernel.org>
Subject: Re: WARNING in hso_free_net_device
Date: Mon, 09 Sep 2019 11:47:24 +0200
Message-ID: <1568022444.365.11.camel@suse.com> (raw)
In-Reply-To: <02ef64cc-5053-e6da-fc59-9970f48064c5@gmail.com>

Am Donnerstag, den 05.09.2019, 22:05 -0400 schrieb Hui Peng:
> 
> On 9/5/2019 7:24 AM, Andrey Konovalov wrote:
> > On Thu, Sep 5, 2019 at 4:20 AM Hui Peng <benquike@gmail.com> wrote:
> > > 
> > > Can you guys have  a look at the attached patch?
> > 
> > Let's try it:
> > 
> > #syz test: https://github.com/google/kasan.git eea39f24
> > 
> > FYI: there are two more reports coming from this driver, which might
> > (or might not) have the same root cause. One of them has a suggested
> > fix by Oliver.
> > 
> > https://syzkaller.appspot.com/bug?extid=67b2bd0e34f952d0321e
> > https://syzkaller.appspot.com/bug?extid=93f2f45b19519b289613
> > 
> 
> I think they are different, though similar.
> This one is resulted from unregistering a network device.
> These 2 are resulted from unregistering a tty device.

Hi,

looks like it. That may indeed be the issue.
Please try to have syzbot test your patch and we will
know more.

	Regards
		Oliver


      reply index

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-03 12:08 syzbot
2019-09-04 20:27 ` Hui Peng
2019-09-04 22:41   ` Stephen Hemminger
2019-09-05  2:20     ` Hui Peng
2019-09-05 11:24       ` Andrey Konovalov
2019-09-05 11:47         ` syzbot
2019-09-06  2:05         ` Hui Peng
2019-09-09  9:47           ` Oliver Neukum [this message]

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