linux-kernel - Re: KASAN: global-out-of-bounds Read in dvb_pll

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Message-ID: <20190813205104.pnyan3kafz26wsse@gofer.mess.org>
Date:   Tue, 13 Aug 2019 21:51:05 +0100
From:   Sean Young <sean@...s.org>
To:     Andrey Konovalov <andreyknvl@...gle.com>
Cc:     syzbot <syzbot+8a8f48672560c8ca59dd@...kaller.appspotmail.com>,
        bnvandana@...il.com, allison@...utok.net, hverkuil-cisco@...all.nl,
        LKML <linux-kernel@...r.kernel.org>, linux-media@...r.kernel.org,
        USB list <linux-usb@...r.kernel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        rfontana@...hat.com,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>,
        Thomas Gleixner <tglx@...utronix.de>, tskd08@...il.com
Subject: Re: KASAN: global-out-of-bounds Read in dvb_pll_attach

On Tue, Aug 13, 2019 at 03:22:49PM +0200, Andrey Konovalov wrote:
> On Wed, Jul 17, 2019 at 2:29 PM syzbot
> <syzbot+8a8f48672560c8ca59dd@...kaller.appspotmail.com> wrote:
> >
> > Hello,
> >
> > syzbot has tested the proposed patch and the reproducer did not trigger
> > crash:
> >
> > Reported-and-tested-by:
> > syzbot+8a8f48672560c8ca59dd@...kaller.appspotmail.com
> >
> > Tested on:
> >
> > commit:         6a3599ce usb-fuzzer: main usb gadget fuzzer driver
> > git tree:       https://github.com/google/kasan.git usb-fuzzer
> > kernel config:  https://syzkaller.appspot.com/x/.config?x=d90745bdf884fc0a
> > compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
> > patch:          https://syzkaller.appspot.com/x/patch.diff?x=1454f4d0600000
> >
> > Note: testing is done by a robot and is best-effort only.
> 
> Hi bnvandana,
> 
> Could you submit this patch? Syzbot testing shows that is fixes the issue.

The patch had issues (see discussion in the thread). I created this patch
but I see now I did not include the correct Reported-by: tag. 

https://www.mail-archive.com/linux-media@vger.kernel.org/msg148889.html

Thanks

Sean