From mboxrd@z Thu Jan 1 00:00:00 1970 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=-11.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS 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 29565C43603 for ; Tue, 17 Dec 2019 15:41:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F100024676 for ; Tue, 17 Dec 2019 15:41:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576597290; bh=14fxz1g93eJrGWAl22AH5K143t43QwrxjnddQxfnLBY=; h=Subject:To:From:Date:List-ID:From; b=gE1Rbx71C67oSK9yT0rkvss+Y+LSrUdeDkvMGuTSFtolQkOxIgHECtrYqFTJ1IRJG 1TtaVxBxa56ZlzFRwrQnyp1KX9tIwoQEgJfaWEhMXxWYofq0AscbmTNuvYgCmXi3Ow 6zHZjT21QX8JBxcWFsJ7nUfg+INiEiA+boLhmXTY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727725AbfLQPl3 (ORCPT ); Tue, 17 Dec 2019 10:41:29 -0500 Received: from mail.kernel.org ([198.145.29.99]:34668 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727370AbfLQPl3 (ORCPT ); Tue, 17 Dec 2019 10:41:29 -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 3462A2465E; Tue, 17 Dec 2019 15:41:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576597288; bh=14fxz1g93eJrGWAl22AH5K143t43QwrxjnddQxfnLBY=; h=Subject:To:From:Date:From; b=XK0uVedqgIuqqjJVjuFzsfXqGFbfQ6tW1Yzkiho+n/UCarnT26oQ48/zPaB0KUX7b Ji16VBp1w+0keEeUJtkI7T8N33tlNVfAU/aklVnsIDrr3UyfEFHuHjrM478BVqQ8Ht bX4xMvOyR2/q2p8UoiqKU1xn6HKEg2O9TK+6kTYg= Subject: patch "usbip: Fix error path of vhci_recv_ret_submit()" added to usb-linus To: suwan.kim027@gmail.com, gregkh@linuxfoundation.org, marmarek@invisiblethingslab.com, skhan@linuxfoundation.org, stable@vger.kernel.org From: Date: Tue, 17 Dec 2019 16:41:18 +0100 Message-ID: <15765972787371@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org This is a note to let you know that I've just added the patch titled usbip: Fix error path of vhci_recv_ret_submit() to my usb git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git in the usb-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. >From aabb5b833872524eaf28f52187e5987984982264 Mon Sep 17 00:00:00 2001 From: Suwan Kim Date: Fri, 13 Dec 2019 11:30:55 +0900 Subject: usbip: Fix error path of vhci_recv_ret_submit() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit If a transaction error happens in vhci_recv_ret_submit(), event handler closes connection and changes port status to kick hub_event. Then hub tries to flush the endpoint URBs, but that causes infinite loop between usb_hub_flush_endpoint() and vhci_urb_dequeue() because "vhci_priv" in vhci_urb_dequeue() was already released by vhci_recv_ret_submit() before a transmission error occurred. Thus, vhci_urb_dequeue() terminates early and usb_hub_flush_endpoint() continuously calls vhci_urb_dequeue(). The root cause of this issue is that vhci_recv_ret_submit() terminates early without giving back URB when transaction error occurs in vhci_recv_ret_submit(). That causes the error URB to still be linked at endpoint list without “vhci_priv". So, in the case of transaction error in vhci_recv_ret_submit(), unlink URB from the endpoint, insert proper error code in urb->status and give back URB. Reported-by: Marek Marczykowski-Górecki Tested-by: Marek Marczykowski-Górecki Signed-off-by: Suwan Kim Cc: stable Acked-by: Shuah Khan Link: https://lore.kernel.org/r/20191213023055.19933-3-suwan.kim027@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/usbip/vhci_rx.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/drivers/usb/usbip/vhci_rx.c b/drivers/usb/usbip/vhci_rx.c index 33f8972ba842..00fc98741c5d 100644 --- a/drivers/usb/usbip/vhci_rx.c +++ b/drivers/usb/usbip/vhci_rx.c @@ -77,16 +77,21 @@ static void vhci_recv_ret_submit(struct vhci_device *vdev, usbip_pack_pdu(pdu, urb, USBIP_RET_SUBMIT, 0); /* recv transfer buffer */ - if (usbip_recv_xbuff(ud, urb) < 0) - return; + if (usbip_recv_xbuff(ud, urb) < 0) { + urb->status = -EPROTO; + goto error; + } /* recv iso_packet_descriptor */ - if (usbip_recv_iso(ud, urb) < 0) - return; + if (usbip_recv_iso(ud, urb) < 0) { + urb->status = -EPROTO; + goto error; + } /* restore the padding in iso packets */ usbip_pad_iso(ud, urb); +error: if (usbip_dbg_flag_vhci_rx) usbip_dump_urb(urb); -- 2.24.1