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=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,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 AE604C56202 for ; Tue, 17 Nov 2020 13:34:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 63694207BC for ; Tue, 17 Nov 2020 13:34:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="1/IJTYBr" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732167AbgKQNeV (ORCPT ); Tue, 17 Nov 2020 08:34:21 -0500 Received: from mail.kernel.org ([198.145.29.99]:44610 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731780AbgKQNeN (ORCPT ); Tue, 17 Nov 2020 08:34:13 -0500 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D876E2465E; Tue, 17 Nov 2020 13:34:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1605620052; bh=Lquq9XnuQLwRDy9GSr/mGzKBOJC2SPeDjTowVCurCv0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=1/IJTYBrGGHQDCW7UtWDN28lEttJYoQMwITSlVx4oixIqWFSBVmgf+mEy2wJaD33n h3rtwhu1NpXSrnBpPe74z4GyJdri18v1qyJJnRdOeMnBsK3p2a0ekWKp1E5qH93FH5 yBg9L8siOC5TIr+OjPOlp1uRWPhCosRqs0AH5u58= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Zhao Qiang , Vladimir Oltean , Mark Brown , Sasha Levin Subject: [PATCH 5.9 062/255] spi: fsl-dspi: fix wrong pointer in suspend/resume Date: Tue, 17 Nov 2020 14:03:22 +0100 Message-Id: <20201117122141.969939199@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201117122138.925150709@linuxfoundation.org> References: <20201117122138.925150709@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: Zhao Qiang [ Upstream commit 9bd77a9ce31dd242fece27219d14fbee5068dd85 ] Since commit 530b5affc675 ("spi: fsl-dspi: fix use-after-free in remove path"), this driver causes a "NULL pointer dereference" in dspi_suspend/resume. This is because since this commit, the drivers private data point to "dspi" instead of "ctlr", the codes in suspend and resume func were not modified correspondly. Fixes: 530b5affc675 ("spi: fsl-dspi: fix use-after-free in remove path") Signed-off-by: Zhao Qiang Reviewed-by: Vladimir Oltean Link: https://lore.kernel.org/r/20201103020546.1822-1-qiang.zhao@nxp.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/spi/spi-fsl-dspi.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c index 108a7d50d2c37..a96762ffb70b6 100644 --- a/drivers/spi/spi-fsl-dspi.c +++ b/drivers/spi/spi-fsl-dspi.c @@ -1106,12 +1106,11 @@ MODULE_DEVICE_TABLE(of, fsl_dspi_dt_ids); #ifdef CONFIG_PM_SLEEP static int dspi_suspend(struct device *dev) { - struct spi_controller *ctlr = dev_get_drvdata(dev); - struct fsl_dspi *dspi = spi_controller_get_devdata(ctlr); + struct fsl_dspi *dspi = dev_get_drvdata(dev); if (dspi->irq) disable_irq(dspi->irq); - spi_controller_suspend(ctlr); + spi_controller_suspend(dspi->ctlr); clk_disable_unprepare(dspi->clk); pinctrl_pm_select_sleep_state(dev); @@ -1121,8 +1120,7 @@ static int dspi_suspend(struct device *dev) static int dspi_resume(struct device *dev) { - struct spi_controller *ctlr = dev_get_drvdata(dev); - struct fsl_dspi *dspi = spi_controller_get_devdata(ctlr); + struct fsl_dspi *dspi = dev_get_drvdata(dev); int ret; pinctrl_pm_select_default_state(dev); @@ -1130,7 +1128,7 @@ static int dspi_resume(struct device *dev) ret = clk_prepare_enable(dspi->clk); if (ret) return ret; - spi_controller_resume(ctlr); + spi_controller_resume(dspi->ctlr); if (dspi->irq) enable_irq(dspi->irq); -- 2.27.0