linux-kernel - Re: KASAN: slab-out-of-bounds Read in hidraw

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Message-ID: <Pine.LNX.4.44L0.1908211223070.1816-100000@iolanthe.rowland.org>
Date:   Wed, 21 Aug 2019 12:24:36 -0400 (EDT)
From:   Alan Stern <stern@...land.harvard.edu>
To:     Andrey Konovalov <andreyknvl@...gle.com>
cc:     syzbot <syzbot+5a6c4ec678a0c6ee84ba@...kaller.appspotmail.com>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Jiri Kosina <jikos@...nel.org>, <linux-input@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        USB list <linux-usb@...r.kernel.org>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>
Subject: Re: KASAN: slab-out-of-bounds Read in hidraw_ioctl

On Wed, 21 Aug 2019, Andrey Konovalov wrote:

> On Wed, Aug 21, 2019 at 3:37 PM syzbot
> <syzbot+5a6c4ec678a0c6ee84ba@...kaller.appspotmail.com> wrote:
> >
> > Hello,
> >
> > syzbot has tested the proposed patch but the reproducer still triggered
> > crash:
> > KASAN: slab-out-of-bounds Read in hidraw_ioctl
> 
> Same here, a different bug.

It looks like I've got the fix for both these bugs.  Testing now...

> > Tested on:
> >
> > commit:         e96407b4 usb-fuzzer: main usb gadget fuzzer driver
> > git tree:       https://github.com/google/kasan.git
> > console output: https://syzkaller.appspot.com/x/log.txt?x=14f14a1e600000
> > kernel config:  https://syzkaller.appspot.com/x/.config?x=cfa2c18fb6a8068e
> > compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
> > patch:          https://syzkaller.appspot.com/x/patch.diff?x=171cd95a600000

Why don't these patch-test reports include the dashboard link?  It sure 
would be handy to have a copy of it here.

Alan Stern