linux-kernel - Re: KASAN: use-after-free Read in hidraw

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Message-ID: <CAAeHK+xhxhdJecq=HMLbZySTxzT_JTvMWdXojTnCdJ+OU2w4Ew@mail.gmail.com>
Date:   Wed, 21 Aug 2019 18:39:50 +0200
From:   Andrey Konovalov <andreyknvl@...gle.com>
To:     syzbot <syzbot+ded1794a717e3b235226@...kaller.appspotmail.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        USB list <linux-usb@...r.kernel.org>,
        Alan Stern <stern@...land.harvard.edu>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>
Subject: Re: KASAN: use-after-free Read in hidraw_ioctl

On Wed, Aug 21, 2019 at 6:38 PM syzbot
<syzbot+ded1794a717e3b235226@...kaller.appspotmail.com> wrote:
>
> Hello,
>
> syzbot has tested the proposed patch and the reproducer did not trigger
> crash:
>
> Reported-and-tested-by:
> syzbot+ded1794a717e3b235226@...kaller.appspotmail.com
>
> Tested on:
>
> commit:         e96407b4 usb-fuzzer: main usb gadget fuzzer driver
> git tree:       https://github.com/google/kasan.git
> kernel config:  https://syzkaller.appspot.com/x/.config?x=792eb47789f57810
> compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
> patch:          https://syzkaller.appspot.com/x/patch.diff?x=126b9da6600000
>
> Note: testing is done by a robot and is best-effort only.

Let's dup this bug into the other one:

#syz dup: KASAN: slab-out-of-bounds Read in hidraw_ioctl