From patchwork Wed Jun 6 13:43:38 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Colin King X-Patchwork-Id: 10450261 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 9093B60234 for ; Wed, 6 Jun 2018 13:44:06 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7CEAF202DB for ; Wed, 6 Jun 2018 13:44:06 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6E994292BB; Wed, 6 Jun 2018 13:44:06 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id F0D40202DB for ; Wed, 6 Jun 2018 13:44:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=M6FSrDD9JB6XZhWlE/U/QB/MPkcxRyK7jypnrFgPu/I=; b=A/PIX7TdkgekyU HGnjYFivc5zQ5kJ7sZcN2NsrF1t8V1PH6GQs3h/LvS07qLH3sSQedtUQaFKpDMMYsRZqd0HJW7vP/ RE0fcoEUHvTKoK0mSzC3fudQdtLCNjJRDjyGIrICh7NNNDZSuq+VRrmlLWy0Bsm/rW72elXi9N+dr VjLeN9tHnfGkP4SYlOwB7ccPNEbnAKhcYNkg293WVssNFKd4EEJ57PHd9VFikmTxQSlflWWbtpb1f JrF3UfklTy1SSvdE1e8sHZTJeT4npKGO8FeZMMwU+cp9wyd5O5ube/30LJ2dlLBInFywmxmgm9XMY gzNwlkQXI+68pEcBcVNw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fQYjE-0007D3-I2; Wed, 06 Jun 2018 13:43:56 +0000 Received: from youngberry.canonical.com ([91.189.89.112]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1fQYjB-0007CU-Jl for linux-arm-kernel@lists.infradead.org; Wed, 06 Jun 2018 13:43:55 +0000 Received: from 1.general.cking.uk.vpn ([10.172.193.212] helo=localhost) by youngberry.canonical.com with esmtpsa (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.76) (envelope-from ) id 1fQYiw-0001Sk-W2; Wed, 06 Jun 2018 13:43:39 +0000 From: Colin King To: Tony Lindgren , Haojian Zhuang , Linus Walleij , linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org, linux-gpio@vger.kernel.org Subject: [PATCH][next] pinctrl: pinctrl-single: add allocation failure checking of saved_vals Date: Wed, 6 Jun 2018 14:43:38 +0100 Message-Id: <20180606134338.4645-1-colin.king@canonical.com> X-Mailer: git-send-email 2.17.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180606_064354_003987_07E990C1 X-CRM114-Status: GOOD ( 12.21 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Colin Ian King Currently saved_vals is being allocated and there is no check for failed allocation (which is more likely than normal when using GFP_ATOMIC). Fix this by checking for a failed allocation and propagating this error return down the the caller chain. Detected by CoverityScan, CID#1469841 ("Dereference null return value") Fixes: 88a1dbdec682 ("pinctrl: pinctrl-single: Add functions to save and restore pinctrl context") Signed-off-by: Colin Ian King Reviewed-by: Johan Hovold Acked-by: Tony Lindgren --- drivers/pinctrl/pinctrl-single.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/drivers/pinctrl/pinctrl-single.c b/drivers/pinctrl/pinctrl-single.c index 9c3c00515aa0..0905ee002041 100644 --- a/drivers/pinctrl/pinctrl-single.c +++ b/drivers/pinctrl/pinctrl-single.c @@ -1588,8 +1588,11 @@ static int pcs_save_context(struct pcs_device *pcs) mux_bytes = pcs->width / BITS_PER_BYTE; - if (!pcs->saved_vals) + if (!pcs->saved_vals) { pcs->saved_vals = devm_kzalloc(pcs->dev, pcs->size, GFP_ATOMIC); + if (!pcs->saved_vals) + return -ENOMEM; + } switch (pcs->width) { case 64: @@ -1649,8 +1652,13 @@ static int pinctrl_single_suspend(struct platform_device *pdev, if (!pcs) return -EINVAL; - if (pcs->flags & PCS_CONTEXT_LOSS_OFF) - pcs_save_context(pcs); + if (pcs->flags & PCS_CONTEXT_LOSS_OFF) { + int ret; + + ret = pcs_save_context(pcs); + if (ret < 0) + return ret; + } return pinctrl_force_sleep(pcs->pctl); }