From: Oliver Neukum <oneukum@suse.com>
To: Andrey Konovalov <andreyknvl@google.com>
Cc: syzkaller-bugs <syzkaller-bugs@googlegroups.com>,
steve_bayless@keysight.com,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
guido.kiener@rohde-schwarz.com,
syzbot <syzbot+55b0304b360654a7537b@syzkaller.appspotmail.com>,
USB list <linux-usb@vger.kernel.org>
Subject: Re: divide error in usbtmc_generic_read
Date: Mon, 19 Aug 2019 14:37:43 +0200 [thread overview]
Message-ID: <1566218263.5663.22.camel@suse.com> (raw)
In-Reply-To: <CAAeHK+zd9P2hLXuXynbZfhVpSE1Sak2GihX6sDCPWfD+kPaEGg@mail.gmail.com>
Am Montag, den 19.08.2019, 14:17 +0200 schrieb Andrey Konovalov:
> On Thu, Aug 15, 2019 at 3:31 PM Oliver Neukum <oneukum@suse.com> wrote:
> >
> > Am Mittwoch, den 14.08.2019, 06:38 -0700 schrieb syzbot:
> > > syzbot has tested the proposed patch but the reproducer still triggered
> > > crash:
> > > KASAN: use-after-free Read in usbtmc_disconnect
> >
> > I am afraid that is a difficiency in KASAN that should be fixed.
> > Is the class of the error compared if I leave in more of the
> > original bug report? Actually the ID is still there, so it really
> > should return an inconclusive in these cases.
>
> I don't get this, what kind of deficiency do you mean?
The original error was a divide by zero. The first fix fixed that
but still another error showed up. If I propose a fix there are
other possibilities besides it working.
I could have no effect on the original bug or my fix breaks
something else and KASAN is making no difference between
those cases.
Regards
Oliver
next prev parent reply other threads:[~2019-08-19 12:37 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-14 11:38 divide error in usbtmc_generic_read syzbot
2019-08-14 13:25 ` Oliver Neukum
2019-08-14 13:38 ` syzbot
2019-08-14 13:52 ` Andrey Konovalov
2019-08-15 13:31 ` Oliver Neukum
2019-08-19 12:17 ` Andrey Konovalov
2019-08-19 12:37 ` Oliver Neukum [this message]
2019-08-19 12:43 ` Andrey Konovalov
2019-08-19 13:09 ` Oliver Neukum
2019-08-19 13:18 ` Andrey Konovalov
2019-08-19 13:49 ` Oliver Neukum
2019-08-19 15:40 ` Andrey Konovalov
2019-08-20 9:01 ` Oliver Neukum
2019-08-15 14:28 ` Oliver Neukum
2019-08-15 14:48 ` syzbot
2019-11-19 13:35 ` Andrey Konovalov
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