From patchwork Wed Sep 1 16:35:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alan Stern X-Patchwork-Id: 12469815 X-Patchwork-Delegate: jikos@jikos.cz 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=-15.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 507BDC432BE for ; Wed, 1 Sep 2021 16:35:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2D6456102A for ; Wed, 1 Sep 2021 16:35:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245405AbhIAQgt (ORCPT ); Wed, 1 Sep 2021 12:36:49 -0400 Received: from netrider.rowland.org ([192.131.102.5]:40017 "HELO netrider.rowland.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S234766AbhIAQgr (ORCPT ); Wed, 1 Sep 2021 12:36:47 -0400 Received: (qmail 405944 invoked by uid 1000); 1 Sep 2021 12:35:49 -0400 Date: Wed, 1 Sep 2021 12:35:49 -0400 From: Alan Stern To: Benjamin Tissoires , Jiri Kosina Cc: Michal Kubecek , Oleksandr Natalenko , linux-input@vger.kernel.org, Linux USB Mailing List Subject: [PATCH 1/3] HID: usbhid: Fix flood of "control queue full" messages Message-ID: <20210901163549.GA404634@rowland.harvard.edu> References: <20210819195300.GA8613@rowland.harvard.edu> <000000000000c322ab05c9f2e880@google.com> <20210820140620.GA35867@rowland.harvard.edu> <20210901153811.GA403560@rowland.harvard.edu> <20210901155145.qflw5s4zqiud7gke@lion.mk-sys.cz> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210901155145.qflw5s4zqiud7gke@lion.mk-sys.cz> User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org From: Michal Kubecek [patch description by Alan Stern] Commit 7652dd2c5cb7 ("USB: core: Check buffer length matches wLength for control transfers") causes control URB submissions to fail if the transfer_buffer_length value disagrees with the setup packet's wLength valuel. Unfortunately, it turns out that the usbhid can trigger this failure mode when it submits a control request for an input report: It pads the transfer buffer size to a multiple of the maxpacket value but does not increase wLength correspondingly. These failures have caused problems for people using an APS UPC, in the form of a flood of log messages resembling: hid-generic 0003:051D:0002.0002: control queue full This patch fixes the problem by setting the wLength value equal to the padded transfer_buffer_length value in hid_submit_ctrl(). As a nice bonus, the code which stores the transfer_buffer_length value is now shared between the two branches of an "if" statement, so it can be de-duplicated. Signed-off-by: Michal Kubecek Signed-off-by: Alan Stern Fixes: 7652dd2c5cb7 ("USB: core: Check buffer length matches wLength for control transfers") Tested-by: Oleksandr Natalenko Tested-by: Benjamin Tissoires Acked-by: Benjamin Tissoires Cc: stable@vger.kernel.org --- drivers/hid/usbhid/hid-core.c | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-) Index: usb-devel/drivers/hid/usbhid/hid-core.c =================================================================== --- usb-devel.orig/drivers/hid/usbhid/hid-core.c +++ usb-devel/drivers/hid/usbhid/hid-core.c @@ -377,27 +377,26 @@ static int hid_submit_ctrl(struct hid_de len = hid_report_len(report); if (dir == USB_DIR_OUT) { usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0); - usbhid->urbctrl->transfer_buffer_length = len; if (raw_report) { memcpy(usbhid->ctrlbuf, raw_report, len); kfree(raw_report); usbhid->ctrl[usbhid->ctrltail].raw_report = NULL; } } else { - int maxpacket, padlen; + int maxpacket; usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0); maxpacket = usb_maxpacket(hid_to_usb_dev(hid), usbhid->urbctrl->pipe, 0); if (maxpacket > 0) { - padlen = DIV_ROUND_UP(len, maxpacket); - padlen *= maxpacket; - if (padlen > usbhid->bufsize) - padlen = usbhid->bufsize; + len = DIV_ROUND_UP(len, maxpacket); + len *= maxpacket; + if (len > usbhid->bufsize) + len = usbhid->bufsize; } else - padlen = 0; - usbhid->urbctrl->transfer_buffer_length = padlen; + len = 0; } + usbhid->urbctrl->transfer_buffer_length = len; usbhid->urbctrl->dev = hid_to_usb_dev(hid); usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;