From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:35046 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753818AbdBDKWo (ORCPT ); Sat, 4 Feb 2017 05:22:44 -0500 Subject: Patch "ata: sata_mv:- Handle return value of devm_ioremap." has been added to the 4.9-stable tree To: arvind.yadav.cs@gmail.com, gregkh@linuxfoundation.org, tj@kernel.org Cc: , From: Date: Sat, 04 Feb 2017 11:22:48 +0100 Message-ID: <14862037687148@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled ata: sata_mv:- Handle return value of devm_ioremap. to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: ata-sata_mv-handle-return-value-of-devm_ioremap.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 064c3db9c564cc5be514ac21fb4aa26cc33db746 Mon Sep 17 00:00:00 2001 From: Arvind Yadav Date: Mon, 12 Dec 2016 23:13:27 +0530 Subject: ata: sata_mv:- Handle return value of devm_ioremap. From: Arvind Yadav commit 064c3db9c564cc5be514ac21fb4aa26cc33db746 upstream. Here, If devm_ioremap will fail. It will return NULL. Then hpriv->base = NULL - 0x20000; Kernel can run into a NULL-pointer dereference. This error check will avoid NULL pointer dereference. Signed-off-by: Arvind Yadav Signed-off-by: Tejun Heo Signed-off-by: Greg Kroah-Hartman --- drivers/ata/sata_mv.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/ata/sata_mv.c +++ b/drivers/ata/sata_mv.c @@ -4132,6 +4132,9 @@ static int mv_platform_probe(struct plat host->iomap = NULL; hpriv->base = devm_ioremap(&pdev->dev, res->start, resource_size(res)); + if (!hpriv->base) + return -ENOMEM; + hpriv->base -= SATAHC0_REG_BASE; hpriv->clk = clk_get(&pdev->dev, NULL); Patches currently in stable-queue which might be from arvind.yadav.cs@gmail.com are queue-4.9/ata-sata_mv-handle-return-value-of-devm_ioremap.patch