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From: Oliver Neukum <oneukum@suse.com>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: Andrey Konovalov <andreyknvl@google.com>,
	syzkaller-bugs <syzkaller-bugs@googlegroups.com>,
	syzbot <syzbot+1b2449b7b5dc240d107a@syzkaller.appspotmail.com>,
	LKML <linux-kernel@vger.kernel.org>,
	USB list <linux-usb@vger.kernel.org>
Subject: Re: KASAN: use-after-free Read in device_release_driver_internal
Date: Tue, 06 Aug 2019 17:33:44 +0200
Message-ID: <1565105624.8136.32.camel@suse.com> (raw)
In-Reply-To: <Pine.LNX.4.44L0.1908061009450.1571-100000@iolanthe.rowland.org>

Am Dienstag, den 06.08.2019, 10:19 -0400 schrieb Alan Stern:
> In any case, I don't know if this missing "get" would cause the 
> problem, but it might well.

Hi,

upon further thought, this should be automated. Checking for
refcount leaks is KASAN's job. In particular, refcounts
should not

* decrease in probe()
* increase in disconnect()
* change in case probe() fails

	Regards
		Oliver


  parent reply index

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-23 14:28 syzbot
2019-08-01 16:01 ` Andrey Konovalov
2019-08-01 18:47   ` Alan Stern
2019-08-06 12:36     ` Oliver Neukum
2019-08-06 12:50       ` Andrey Konovalov
2019-08-07 13:38         ` Oliver Neukum
2019-08-07 13:44           ` Andrey Konovalov
2019-08-07 13:44             ` Andrey Konovalov
2019-08-07 13:45               ` Andrey Konovalov
2019-08-07 14:13                 ` syzbot
2019-08-07 13:56               ` syzbot
2019-08-07 17:40                 ` Alan Stern
2019-08-07 17:51                   ` syzbot
2019-08-07 18:05                     ` Alan Stern
2019-08-07 18:23                       ` syzbot
2019-08-07 18:31                         ` Alan Stern
2019-08-08 12:27                           ` Andrey Konovalov
2019-08-08 12:43                             ` Dmitry Vyukov
2019-08-08 13:03                               ` Andrey Konovalov
2019-08-08 13:59                                 ` Alan Stern
2019-08-13 12:42                                   ` Andrey Konovalov
2019-08-13 13:22                                     ` Oliver Neukum
2019-08-13 13:24                                       ` Andrey Konovalov
2019-08-13 15:16                                       ` Greg KH
2019-08-13 13:59               ` Andrey Konovalov
2019-08-06 14:19       ` Alan Stern
2019-08-06 14:25         ` Oliver Neukum
2019-08-06 15:33         ` Oliver Neukum [this message]
2019-08-07 13:46           ` Andrey Konovalov

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