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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable 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 A23B1C2B9FB for ; Mon, 10 May 2021 12:16:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8466B61430 for ; Mon, 10 May 2021 12:16:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344646AbhEJMQB (ORCPT ); Mon, 10 May 2021 08:16:01 -0400 Received: from mail.kernel.org ([198.145.29.99]:45204 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236483AbhEJLIO (ORCPT ); Mon, 10 May 2021 07:08:14 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 5FF0D61433; Mon, 10 May 2021 11:01:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620644493; bh=oE3rq8mzqK9C9QSxi4EmW0MEeCJS2JJlFnlcTfcYlEs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kmlWtKhTJLq6k9RIvp+iZWS3tECeC2wwGhrtxIQm0RGNiXd5XiN9WoXw0j45yhXBc lNEQOowpi3q+ONrMeS8tfoxD1//3PdU87bZRn/rOPJp9XrE3UW0iDFUxQhE7M0gJWl OpjbSXCEcQNxzd5J4gNWVLfdNiKU3EJ1J3uGOa0Y= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Mathias Nyman , Sasha Levin Subject: [PATCH 5.12 104/384] xhci: check control context is valid before dereferencing it. Date: Mon, 10 May 2021 12:18:13 +0200 Message-Id: <20210510102018.311627398@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210510102014.849075526@linuxfoundation.org> References: <20210510102014.849075526@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Mathias Nyman [ Upstream commit 597899d2f7c5619c87185ee7953d004bd37fd0eb ] Don't dereference ctrl_ctx before checking it's valid. Issue reported by Klockwork Signed-off-by: Mathias Nyman Link: https://lore.kernel.org/r/20210406070208.3406266-3-mathias.nyman@linux.intel.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/usb/host/xhci.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index 1975016f46bf..5df780d55df0 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -3269,6 +3269,14 @@ static void xhci_endpoint_reset(struct usb_hcd *hcd, /* config ep command clears toggle if add and drop ep flags are set */ ctrl_ctx = xhci_get_input_control_ctx(cfg_cmd->in_ctx); + if (!ctrl_ctx) { + spin_unlock_irqrestore(&xhci->lock, flags); + xhci_free_command(xhci, cfg_cmd); + xhci_warn(xhci, "%s: Could not get input context, bad type.\n", + __func__); + goto cleanup; + } + xhci_setup_input_ctx_for_config_ep(xhci, cfg_cmd->in_ctx, vdev->out_ctx, ctrl_ctx, ep_flag, ep_flag); xhci_endpoint_copy(xhci, cfg_cmd->in_ctx, vdev->out_ctx, ep_index); -- 2.30.2