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=-13.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 8DE7BC388F7 for ; Tue, 10 Nov 2020 04:01:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2F01D2063A for ; Tue, 10 Nov 2020 04:01:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="i27K9AUn" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733269AbgKJDzp (ORCPT ); Mon, 9 Nov 2020 22:55:45 -0500 Received: from mail.kernel.org ([198.145.29.99]:57306 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733260AbgKJDzo (ORCPT ); Mon, 9 Nov 2020 22:55:44 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8BC5D20731; Tue, 10 Nov 2020 03:55:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604980543; bh=nu/fqrzXW8Y6fnHt6NEplWxuDJnS8wfMgJbxvGOqIlo=; h=From:To:Cc:Subject:Date:From; b=i27K9AUn1kOxNgt18KVvFg4BCEBtGSsBvmZChVxCSEJCklA4pQA4+FZ2TPdbhfup6 FmW2cZVelBKrloQKa4z6fRt1z3sNd9fMlR5/lWalCKtveI77qF05I5Habl03pbQFbw s4epzPd0lVRUM/u5V+kGByWvm3/AEXQ1uh/v1uUQ= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Evgeny Novikov , Pavel Andrianov , Felipe Balbi , Sasha Levin , linux-usb@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 01/21] usb: gadget: goku_udc: fix potential crashes in probe Date: Mon, 9 Nov 2020 22:55:21 -0500 Message-Id: <20201110035541.424648-1-sashal@kernel.org> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Evgeny Novikov [ Upstream commit 0d66e04875c5aae876cf3d4f4be7978fa2b00523 ] goku_probe() goes to error label "err" and invokes goku_remove() in case of failures of pci_enable_device(), pci_resource_start() and ioremap(). goku_remove() gets a device from pci_get_drvdata(pdev) and works with it without any checks, in particular it dereferences a corresponding pointer. But goku_probe() did not set this device yet. So, one can expect various crashes. The patch moves setting the device just after allocation of memory for it. Found by Linux Driver Verification project (linuxtesting.org). Reported-by: Pavel Andrianov Signed-off-by: Evgeny Novikov Signed-off-by: Felipe Balbi Signed-off-by: Sasha Levin --- drivers/usb/gadget/udc/goku_udc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/gadget/udc/goku_udc.c b/drivers/usb/gadget/udc/goku_udc.c index c3721225b61ed..b706ad3034bc1 100644 --- a/drivers/usb/gadget/udc/goku_udc.c +++ b/drivers/usb/gadget/udc/goku_udc.c @@ -1757,6 +1757,7 @@ static int goku_probe(struct pci_dev *pdev, const struct pci_device_id *id) goto err; } + pci_set_drvdata(pdev, dev); spin_lock_init(&dev->lock); dev->pdev = pdev; dev->gadget.ops = &goku_ops; @@ -1790,7 +1791,6 @@ static int goku_probe(struct pci_dev *pdev, const struct pci_device_id *id) } dev->regs = (struct goku_udc_regs __iomem *) base; - pci_set_drvdata(pdev, dev); INFO(dev, "%s\n", driver_desc); INFO(dev, "version: " DRIVER_VERSION " %s\n", dmastr()); INFO(dev, "irq %d, pci mem %p\n", pdev->irq, base); -- 2.27.0