From patchwork Wed Jan 22 09:28:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 233580 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F135BC2D0DB for ; Wed, 22 Jan 2020 09:40:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BA7D624687 for ; Wed, 22 Jan 2020 09:40:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579686029; bh=QbzSPHtU9cuKycGZVfisOWsZw2epy5XxYwUadro/hAg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=OpLdVN3Wh7cbXywPDAs/X81rPdsbMdt+e2aCBVoef2E50W3sn2Z8Z4W1gY0ceb1mn UpgjaZ3RuzJBTw39z6f1hRvCvNlkGhQPO+UBkLqenFM+pCzdSUn/2FDyWinlsZJaOa BrdV7UIbLCq8szb0lnhqT1tvVOEidoipeRpXmwP8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387450AbgAVJk2 (ORCPT ); Wed, 22 Jan 2020 04:40:28 -0500 Received: from mail.kernel.org ([198.145.29.99]:59326 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387445AbgAVJk1 (ORCPT ); Wed, 22 Jan 2020 04:40:27 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 20CC624680; Wed, 22 Jan 2020 09:40:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579686026; bh=QbzSPHtU9cuKycGZVfisOWsZw2epy5XxYwUadro/hAg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XM2aF05Ip8gUBVkxWE/NtKZHZDH0Ixl2Z8GeoILsaObaI1Zf7dJVYvPjl30OhZttd eIZDgWGcG4n70Uu5fFC1NWZ4HPfuiYzlFftZUbYpBps55qjNKyu4LpsyXWL4NibeYR lwoZihF4oJJxtEYa28VkEac8vZAphR+ToL78LioY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Johan Hovold Subject: [PATCH 4.19 014/103] USB: serial: io_edgeport: handle unbound ports on URB completion Date: Wed, 22 Jan 2020 10:28:30 +0100 Message-Id: <20200122092805.814202345@linuxfoundation.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200122092803.587683021@linuxfoundation.org> References: <20200122092803.587683021@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Johan Hovold commit e37d1aeda737a20b1846a91a3da3f8b0f00cf690 upstream. Check for NULL port data in the shared interrupt and bulk completion callbacks to avoid dereferencing a NULL pointer in case a device sends data for a port device which isn't bound to a driver (e.g. due to a malicious device having unexpected endpoints or after an allocation failure on port probe). Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: stable Reviewed-by: Greg Kroah-Hartman Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/io_edgeport.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/usb/serial/io_edgeport.c +++ b/drivers/usb/serial/io_edgeport.c @@ -716,7 +716,7 @@ static void edge_interrupt_callback(stru if (txCredits) { port = edge_serial->serial->port[portNumber]; edge_port = usb_get_serial_port_data(port); - if (edge_port->open) { + if (edge_port && edge_port->open) { spin_lock_irqsave(&edge_port->ep_lock, flags); edge_port->txCredits += txCredits; @@ -1843,7 +1843,7 @@ static void process_rcvd_data(struct edg port = edge_serial->serial->port[ edge_serial->rxPort]; edge_port = usb_get_serial_port_data(port); - if (edge_port->open) { + if (edge_port && edge_port->open) { dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n", __func__, rxLen, edge_serial->rxPort);