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=-19.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 4C29DC433B4 for ; Sun, 2 May 2021 14:08:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2AB3E613D3 for ; Sun, 2 May 2021 14:08:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232940AbhEBOJI (ORCPT ); Sun, 2 May 2021 10:09:08 -0400 Received: from mail.kernel.org ([198.145.29.99]:51246 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233465AbhEBOG2 (ORCPT ); Sun, 2 May 2021 10:06:28 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id E15FE6147E; Sun, 2 May 2021 14:05:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1619964334; bh=N3FxKqWZrTgdcyVZefZWFKOqV2K59cqXtACh8OPqPuQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=flHEK1HjtYUvNFGIqZRIcWrGXviburyZt4LNSLvxsodzbWSGJAREzD3Dmc9bDhNS3 J9rHXTejyGu1ixhSdzKOEMtXhgXHEhRISTTSS/g4fJRaDIcUGSJrcsnao6z5EnB3yD eDqlEB2PoWsQCs4ErXtV9OYlj3VjDr0TeG8vVKRF3V81gsu1DYuetXiX8lev/B+ORY rLH7h8FW+CrmHQLvIjC3QZO9uL/VOtxKnxvgNzV2ZmX/zozWVf7tZZNMnrESvLpSWe f9q1BHbh3RS5MYtBF16V8oznMFu00IzhFB4ur6mNL9XFjSKooZDfhbKyeKlc5KAYZF H+mDvdjwMA4zg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Mathias Nyman , Greg Kroah-Hartman , Sasha Levin , linux-usb@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 13/21] xhci: check control context is valid before dereferencing it. Date: Sun, 2 May 2021 10:05:09 -0400 Message-Id: <20210502140517.2719912-13-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210502140517.2719912-1-sashal@kernel.org> References: <20210502140517.2719912-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore 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 6c508d0313f7..fc07d68fdd15 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -3148,6 +3148,14 @@ 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