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 9270CC43462 for ; Mon, 10 May 2021 10:56:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6287B61624 for ; Mon, 10 May 2021 10:56:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231857AbhEJK5w (ORCPT ); Mon, 10 May 2021 06:57:52 -0400 Received: from mail.kernel.org ([198.145.29.99]:59424 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233170AbhEJKpQ (ORCPT ); Mon, 10 May 2021 06:45:16 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id EAE6361482; Mon, 10 May 2021 10:35:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620642909; bh=s++pOuEuj5uVGNpgdbWGjOD4K3Kud/91J//OAfiA/aw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Jmb5/z53PrILbgcJ5HCXnFLIJkkmFT75XhmVl3McM7BfxGYVuqlXZ/ZycSmJc+3XD HOWVC00RKpPrUlM6wvLEH+1KMUpLXINCwFbmaXewlsJzi3Yc9I5LBMK/HvT9+uoVIC pRHohN2rLBlBmEq4c1e5nINxawKtTsuPIWtXPdPQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hulk Robot , Yang Yingliang , Vinod Koul , Sasha Levin Subject: [PATCH 5.10 101/299] phy: phy-twl4030-usb: Fix possible use-after-free in twl4030_usb_remove() Date: Mon, 10 May 2021 12:18:18 +0200 Message-Id: <20210510102008.269232224@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210510102004.821838356@linuxfoundation.org> References: <20210510102004.821838356@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: Yang Yingliang [ Upstream commit e1723d8b87b73ab363256e7ca3af3ddb75855680 ] This driver's remove path calls cancel_delayed_work(). However, that function does not wait until the work function finishes. This means that the callback function may still be running after the driver's remove function has finished, which would result in a use-after-free. Fix by calling cancel_delayed_work_sync(), which ensures that the work is properly cancelled, no longer running, and unable to re-schedule itself. Reported-by: Hulk Robot Signed-off-by: Yang Yingliang Link: https://lore.kernel.org/r/20210407092716.3270248-1-yangyingliang@huawei.com Signed-off-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/phy/ti/phy-twl4030-usb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/phy/ti/phy-twl4030-usb.c b/drivers/phy/ti/phy-twl4030-usb.c index 9887f908f540..812e5409d359 100644 --- a/drivers/phy/ti/phy-twl4030-usb.c +++ b/drivers/phy/ti/phy-twl4030-usb.c @@ -779,7 +779,7 @@ static int twl4030_usb_remove(struct platform_device *pdev) usb_remove_phy(&twl->phy); pm_runtime_get_sync(twl->dev); - cancel_delayed_work(&twl->id_workaround_work); + cancel_delayed_work_sync(&twl->id_workaround_work); device_remove_file(twl->dev, &dev_attr_vbus); /* set transceiver mode to power on defaults */ -- 2.30.2