From: Johan Hovold <johan@kernel.org>
To: Dmitry Vyukov <dvyukov@google.com>
Cc: Johan Hovold <johan@kernel.org>,
syzbot <syzbot+0243cb250a51eeefb8cc@syzkaller.appspotmail.com>,
Andrey Konovalov <andreyknvl@google.com>,
dmg@turingmachine.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
LKML <linux-kernel@vger.kernel.org>,
USB list <linux-usb@vger.kernel.org>,
syzkaller-bugs <syzkaller-bugs@googlegroups.com>
Subject: Re: KASAN: use-after-free Read in adu_disconnect
Date: Fri, 20 Sep 2019 11:21:53 +0200 [thread overview]
Message-ID: <20190920092153.GN30545@localhost> (raw)
In-Reply-To: <CACT4Y+Yg5wTsMUGRmTwexKUMzi1ZxrH3k3yaMaJvLaEp7qnjSw@mail.gmail.com>
On Fri, Sep 20, 2019 at 11:13:14AM +0200, Dmitry Vyukov wrote:
> On Fri, Sep 20, 2019 at 11:08 AM Johan Hovold <johan@kernel.org> wrote:
> >
> > On Fri, Aug 09, 2019 at 01:24:04PM -0700, syzbot wrote:
> > > syzbot has found a reproducer for the following crash on:
> > >
> > > HEAD commit: e96407b4 usb-fuzzer: main usb gadget fuzzer driver
> > > git tree: https://github.com/google/kasan.git usb-fuzzer
> > > console output: https://syzkaller.appspot.com/x/log.txt?x=13871a4a600000
> > > kernel config: https://syzkaller.appspot.com/x/.config?x=cfa2c18fb6a8068e
> > > dashboard link: https://syzkaller.appspot.com/bug?extid=0243cb250a51eeefb8cc
> > > compiler: gcc (GCC) 9.0.0 20181231 (experimental)
> > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11c4c8e2600000
> > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11d80d2c600000
> > >
> > > IMPORTANT: if you fix the bug, please add the following tag to the commit:
> > > Reported-by: syzbot+0243cb250a51eeefb8cc@syzkaller.appspotmail.com
> > >
> > > usb 1-1: USB disconnect, device number 4
> > > ==================================================================
> > > BUG: KASAN: use-after-free in atomic64_read
> > > include/asm-generic/atomic-instrumented.h:836 [inline]
> > > BUG: KASAN: use-after-free in atomic_long_read
> > > include/asm-generic/atomic-long.h:28 [inline]
> > > BUG: KASAN: use-after-free in __mutex_unlock_slowpath+0x96/0x670
> > > kernel/locking/mutex.c:1211
> > > Read of size 8 at addr ffff8881d1d0aa00 by task kworker/0:1/12
> >
> > Let's resend and retest with commit id from latest report to make sure
> > the patch was actually applied during the last run:
>
> The reply contains:
> patch: https://syzkaller.appspot.com/x/patch.diff?x=1440268d600000
> that's what's being parsed and applied during testing.
Thanks for confirming, but I can't seem to find that link in the report
from syzbot:
https://lkml.kernel.org/r/000000000000b05ce40592f8521a@google.com
Is it supposed to be there?
Johan
next prev parent reply other threads:[~2019-09-20 9:21 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-05 11:58 KASAN: use-after-free Read in adu_disconnect syzbot
2019-08-09 20:24 ` syzbot
2019-09-19 10:35 ` Johan Hovold
2019-09-19 10:53 ` syzbot
2019-09-20 8:26 ` Johan Hovold
2019-09-20 9:02 ` syzbot
2019-09-20 9:08 ` Johan Hovold
2019-09-20 9:13 ` Dmitry Vyukov
2019-09-20 9:21 ` Johan Hovold [this message]
2019-09-20 9:28 ` Dmitry Vyukov
2019-09-20 9:35 ` Johan Hovold
2019-09-20 10:05 ` Dmitry Vyukov
2019-09-20 9:20 ` syzbot
2019-09-20 10:02 ` Johan Hovold
2019-09-20 10:08 ` Dmitry Vyukov
2019-09-20 10:16 ` Andrey Konovalov
2019-09-20 14:31 ` Johan Hovold
2019-09-20 10:21 ` syzbot
2019-09-20 14:38 ` Johan Hovold
2019-09-20 14:58 ` syzbot
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