From: Peilin Ye <yepeilin.cs@gmail.com>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: marcel@holtmann.org, stable@vger.kernel.org
Subject: Re: [PATCH 4.14 4.9 4.4-stable] Bluetooth: Fix slab-out-of-bounds read in hci_le_direct_adv_report_evt()
Date: Wed, 23 Dec 2020 13:38:24 -0500 [thread overview]
Message-ID: <20201223183824.GA17390@PWN> (raw)
In-Reply-To: <X+OJyx/VEBlfItDz@kroah.com>
On Wed, Dec 23, 2020 at 07:17:47PM +0100, Greg KH wrote:
> On Wed, Dec 23, 2020 at 01:04:46PM -0500, Peilin Ye wrote:
> > commit f7e0e8b2f1b0a09b527885babda3e912ba820798 upstream.
> >
> > `num_reports` is not being properly checked. A malformed event packet with
> > a large `num_reports` number makes hci_le_direct_adv_report_evt() read out
> > of bounds. Fix it.
> >
> > Backporting notes:
> > - Rebased on linux-4.14.y, commit 3f2ecb86cb90 ("Linux 4.14.212")
> > - Retested by syzbot
> >
> > Cc: stable@vger.kernel.org
> > Fixes: 2f010b55884e ("Bluetooth: Add support for handling LE Direct Advertising Report events")
> > Reported-and-tested-by: syzbot+24ebd650e20bd263ca01@syzkaller.appspotmail.com
> > Link: https://syzkaller.appspot.com/bug?extid=24ebd650e20bd263ca01
> > Signed-off-by: Peilin Ye <yepeilin.cs@gmail.com>
> > Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
> > ---
> > net/bluetooth/hci_event.c | 12 +++++-------
> > 1 file changed, 5 insertions(+), 7 deletions(-)
>
> Thanks for the backport, now queued up!
<offlist>
No problem! It's 24th in China - Merry Christmas!
Peilin
prev parent reply other threads:[~2020-12-23 18:39 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-23 18:04 [PATCH 4.14 4.9 4.4-stable] Bluetooth: Fix slab-out-of-bounds read in hci_le_direct_adv_report_evt() Peilin Ye
2020-12-23 18:17 ` Greg KH
2020-12-23 18:38 ` Peilin Ye [this message]
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