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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 0EA85C43331 for ; Wed, 13 Nov 2019 02:21:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CF9272067B for ; Wed, 13 Nov 2019 02:21:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573611709; bh=GTMVDaXzuzU2Vu00XLlOwXvvEsFSRCcG11kDpNM1lzw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=lCqV/ppz6WxfbEukxnWXE+9fV+2tnQ1rTowpu40I68TQN2VJSLqZBzZfw1ZDwOdm9 P3t4M+eOjJ59dhyB+9mwZ5Wkcrz/UJl5UyyMAcaIUKT6cFfGlff8IDTWZL/SLXRawT MQVquLwcxU0rpp8hZQYxaqGYPiHXDMvX1Tvv98FA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730344AbfKMCVt (ORCPT ); Tue, 12 Nov 2019 21:21:49 -0500 Received: from mail.kernel.org ([198.145.29.99]:43964 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728691AbfKMBxw (ORCPT ); Tue, 12 Nov 2019 20:53:52 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2F30B22467; Wed, 13 Nov 2019 01:53:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573610031; bh=GTMVDaXzuzU2Vu00XLlOwXvvEsFSRCcG11kDpNM1lzw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=edMTHAxbFcfZacX9B7LSYeGblsMo+zjw+N0cbIPV+UKbmDkURaMUOiqvsaCKtguhx NcUgsOmZ0M44gNaVSi0PSGMRRONuzyWHf0YmyZq7gI2WCQiSvUJ1GgSup9FLFA+eUT TS9VU5TKh/K9BihXfIuYzVDwFfm9OXnTqSz5wwxM= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Suman Anna , Arnaud Pouliquen , Bjorn Andersson , Sasha Levin , linux-remoteproc@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 125/209] remoteproc: Check for NULL firmwares in sysfs interface Date: Tue, 12 Nov 2019 20:49:01 -0500 Message-Id: <20191113015025.9685-125-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191113015025.9685-1-sashal@kernel.org> References: <20191113015025.9685-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Suman Anna [ Upstream commit faeadbb64094757150a8c2a3175ca418dbdd472c ] The remoteproc framework provides a sysfs file 'firmware' for modifying the firmware image name from userspace. Add an additional check to ensure NULL firmwares are errored out right away, rather than getting a delayed error while requesting a firmware during the start of a remoteproc later on. Tested-by: Arnaud Pouliquen Signed-off-by: Suman Anna Signed-off-by: Bjorn Andersson Signed-off-by: Sasha Levin --- drivers/remoteproc/remoteproc_sysfs.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/remoteproc/remoteproc_sysfs.c b/drivers/remoteproc/remoteproc_sysfs.c index 47be411400e56..3a4c3d7cafca3 100644 --- a/drivers/remoteproc/remoteproc_sysfs.c +++ b/drivers/remoteproc/remoteproc_sysfs.c @@ -48,6 +48,11 @@ static ssize_t firmware_store(struct device *dev, } len = strcspn(buf, "\n"); + if (!len) { + dev_err(dev, "can't provide a NULL firmware\n"); + err = -EINVAL; + goto out; + } p = kstrndup(buf, len, GFP_KERNEL); if (!p) { -- 2.20.1