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,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 1A6A9C433F5 for ; Thu, 9 Sep 2021 13:17:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 06E7260E94 for ; Thu, 9 Sep 2021 13:17:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1358709AbhIINSb (ORCPT ); Thu, 9 Sep 2021 09:18:31 -0400 Received: from mail.kernel.org ([198.145.29.99]:46262 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1357885AbhIINFS (ORCPT ); Thu, 9 Sep 2021 09:05:18 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id A371963280; Thu, 9 Sep 2021 12:00:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1631188803; bh=cJuvfYSyGsgXQlB4XaacXMJyw9FoYiKpfP6CmbpT0+o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RigmaCbjp0CoM5rYfq0wmrOtH8nI4+7xttdN2eUzhbuYz92fyyXXskESIxcjlRJTw senCtcIMqks+2l8PBYld+F44kounFQ5EqlcnkbS2zhsQxM4YKuYPkfS0BEZrNdhYL5 p0bDHW9bFCZSV2T07EZaPBCVX1o9t18UjqnRjtyEbT+EvkAi8sTJcabb38hYjwTD0A l6YtBX3boxnO8jfSimd2Tl8RiKlKscXDjad+3wPRHvLMh9t1PwIFAf1SpAYbRnxMAd zjNmqfTf/imfV7mamRb8VW5vxMC/nRLmjLK0m6oJMqjFlFS/OHkFN4jEMsrmeE/LAJ g2eU41xFUGT1g== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Nadezda Lutovinova , Greg Kroah-Hartman , Sasha Levin , linux-usb@vger.kernel.org Subject: [PATCH AUTOSEL 4.14 50/59] usb: musb: musb_dsps: request_irq() after initializing musb Date: Thu, 9 Sep 2021 07:58:51 -0400 Message-Id: <20210909115900.149795-50-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210909115900.149795-1-sashal@kernel.org> References: <20210909115900.149795-1-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-usb@vger.kernel.org From: Nadezda Lutovinova [ Upstream commit 7c75bde329d7e2a93cf86a5c15c61f96f1446cdc ] If IRQ occurs between calling dsps_setup_optional_vbus_irq() and dsps_create_musb_pdev(), then null pointer dereference occurs since glue->musb wasn't initialized yet. The patch puts initializing of neccesery data before registration of the interrupt handler. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Nadezda Lutovinova Link: https://lore.kernel.org/r/20210819163323.17714-1-lutovinova@ispras.ru Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/usb/musb/musb_dsps.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c index b7d460adaa61..a582c3847dc2 100644 --- a/drivers/usb/musb/musb_dsps.c +++ b/drivers/usb/musb/musb_dsps.c @@ -930,23 +930,22 @@ static int dsps_probe(struct platform_device *pdev) if (!glue->usbss_base) return -ENXIO; - if (usb_get_dr_mode(&pdev->dev) == USB_DR_MODE_PERIPHERAL) { - ret = dsps_setup_optional_vbus_irq(pdev, glue); - if (ret) - goto err_iounmap; - } - platform_set_drvdata(pdev, glue); pm_runtime_enable(&pdev->dev); ret = dsps_create_musb_pdev(glue, pdev); if (ret) goto err; + if (usb_get_dr_mode(&pdev->dev) == USB_DR_MODE_PERIPHERAL) { + ret = dsps_setup_optional_vbus_irq(pdev, glue); + if (ret) + goto err; + } + return 0; err: pm_runtime_disable(&pdev->dev); -err_iounmap: iounmap(glue->usbss_base); return ret; } -- 2.30.2