From patchwork Tue Jan 21 16:00:37 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mika Westerberg X-Patchwork-Id: 11344193 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C9B8992A for ; Tue, 21 Jan 2020 16:04:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B18D9217F4 for ; Tue, 21 Jan 2020 16:04:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729099AbgAUQEH (ORCPT ); Tue, 21 Jan 2020 11:04:07 -0500 Received: from mga18.intel.com ([134.134.136.126]:18395 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728904AbgAUQEH (ORCPT ); Tue, 21 Jan 2020 11:04:07 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 21 Jan 2020 08:01:19 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,346,1574150400"; d="scan'208";a="250299023" Received: from black.fi.intel.com ([10.237.72.28]) by fmsmga004.fm.intel.com with ESMTP; 21 Jan 2020 08:01:15 -0800 Received: by black.fi.intel.com (Postfix, from userid 1001) id B3B3194; Tue, 21 Jan 2020 18:01:14 +0200 (EET) From: Mika Westerberg To: Andy Shevchenko , Darren Hart , Lee Jones Cc: Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H . Peter Anvin" , x86@kernel.org, Zha Qipeng , "David E . Box" , Guenter Roeck , Heikki Krogerus , Greg Kroah-Hartman , Wim Van Sebroeck , Mark Brown , Mika Westerberg , platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 01/38] platform/x86: intel_mid_powerbtn: Take a copy of ddata Date: Tue, 21 Jan 2020 19:00:37 +0300 Message-Id: <20200121160114.60007-2-mika.westerberg@linux.intel.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200121160114.60007-1-mika.westerberg@linux.intel.com> References: <20200121160114.60007-1-mika.westerberg@linux.intel.com> MIME-Version: 1.0 Sender: platform-driver-x86-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: platform-driver-x86@vger.kernel.org The driver gets driver_data from memory that is marked as const (which is probably put to read-only memory) and it then modifies it. This likely causes some sort of fault to happen. Fix this by taking a copy of the structure. Fixes: c94a8ff14de3 ("platform/x86: intel_mid_powerbtn: make mid_pb_ddata const") Signed-off-by: Mika Westerberg Reviewed-by: Andy Shevchenko --- drivers/platform/x86/intel_mid_powerbtn.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/platform/x86/intel_mid_powerbtn.c b/drivers/platform/x86/intel_mid_powerbtn.c index 292bace83f1e..6f436836fe50 100644 --- a/drivers/platform/x86/intel_mid_powerbtn.c +++ b/drivers/platform/x86/intel_mid_powerbtn.c @@ -146,9 +146,10 @@ static int mid_pb_probe(struct platform_device *pdev) input_set_capability(input, EV_KEY, KEY_POWER); - ddata = (struct mid_pb_ddata *)id->driver_data; + ddata = devm_kmemdup(&pdev->dev, (void *)id->driver_data, + sizeof(*ddata), GFP_KERNEL); if (!ddata) - return -ENODATA; + return -ENOMEM; ddata->dev = &pdev->dev; ddata->irq = irq;