From: Johan Hovold <johan@kernel.org>
To: Leonardo Antoniazzi <leoanto@aruba.it>
Cc: linux-usb@vger.kernel.org,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Anirudh Rayabharam <mail@anirudhrb.com>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] net: hso: fix NULL-deref on disconnect regression
Date: Mon, 26 Apr 2021 11:35:46 +0200 [thread overview]
Message-ID: <YIaJcgmiJFERvbEF@hovoldconsulting.com> (raw)
In-Reply-To: <20210426112911.fb3593c3a9ecbabf98a13313@aruba.it>
On Mon, Apr 26, 2021 at 11:29:11AM +0200, Leonardo Antoniazzi wrote:
> On Mon, 26 Apr 2021 10:11:49 +0200
> Johan Hovold <johan@kernel.org> wrote:
>
> > Commit 8a12f8836145 ("net: hso: fix null-ptr-deref during tty device
> > unregistration") fixed the racy minor allocation reported by syzbot, but
> > introduced an unconditional NULL-pointer dereference on every disconnect
> > instead.
> >
> > Specifically, the serial device table must no longer be accessed after
> > the minor has been released by hso_serial_tty_unregister().
> >
> > Fixes: 8a12f8836145 ("net: hso: fix null-ptr-deref during tty device unregistration")
> > Cc: stable@vger.kernel.org
> > Cc: Anirudh Rayabharam <mail@anirudhrb.com>
> > Reported-by: Leonardo Antoniazzi <leoanto@aruba.it>
> > Signed-off-by: Johan Hovold <johan@kernel.org>
> > ---
> the patch fix the problem
Thanks for confirming.
Next time, please keep the CC list intact when replying so that everyone
sees that you've tested it.
Johan
next prev parent reply other threads:[~2021-04-26 9:36 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-26 8:11 [PATCH] net: hso: fix NULL-deref on disconnect regression Johan Hovold
[not found] ` <20210426112911.fb3593c3a9ecbabf98a13313@aruba.it>
2021-04-26 9:35 ` Johan Hovold [this message]
2021-04-26 9:50 ` Greg Kroah-Hartman
2021-04-26 20:09 ` David Miller
2021-04-27 6:11 ` Greg KH
2021-04-26 14:01 ` Anirudh Rayabharam
2021-04-26 20:00 ` patchwork-bot+netdevbpf
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