linux-kernel - Re: [PATCH net] hso: fix NULL-deref on tty open

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Date:   Tue, 01 Oct 2019 21:08:14 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     johan@...nel.org
Cc:     linux-usb@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net] hso: fix NULL-deref on tty open

From: Johan Hovold <johan@...nel.org>
Date: Mon, 30 Sep 2019 17:12:41 +0200

> Fix NULL-pointer dereference on tty open due to a failure to handle a
> missing interrupt-in endpoint when probing modem ports:
> 
> 	BUG: kernel NULL pointer dereference, address: 0000000000000006
> 	...
> 	RIP: 0010:tiocmget_submit_urb+0x1c/0xe0 [hso]
> 	...
> 	Call Trace:
> 	hso_start_serial_device+0xdc/0x140 [hso]
> 	hso_serial_open+0x118/0x1b0 [hso]
> 	tty_open+0xf1/0x490
> 
> Fixes: 542f54823614 ("tty: Modem functions for the HSO driver")
> Signed-off-by: Johan Hovold <johan@...nel.org>

Applied, thanks.