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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2475FC433FE for ; Mon, 23 May 2022 17:12:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239788AbiEWRM4 (ORCPT ); Mon, 23 May 2022 13:12:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37822 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239705AbiEWRKh (ORCPT ); Mon, 23 May 2022 13:10:37 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A35826B674; Mon, 23 May 2022 10:10:16 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 83109B81203; Mon, 23 May 2022 17:09:57 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D99A6C385A9; Mon, 23 May 2022 17:09:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1653325796; bh=k25EnSYBuBHACKjBV50Gd+fEfovRN5hpv6egPbQrWPY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=017YhRiQEkA5vhv+0Sgl/mPZk3cXFa7zPrfuw4Zz67R+JAQ41Ffvx1dE+QBlrcMqK bi2MeqV6h9Xz17gz0y33/ZREflGUWjCAKthZx8NsSKygo/w9WnEQ5FDTfihMR2ANUG 1qLBRjhseq5fCmwu4ummT9ujY71c1PwzEaLqP/S0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Xiaoke Wang , Thomas Bogendoerfer , Sasha Levin Subject: [PATCH 4.19 06/44] MIPS: lantiq: check the return value of kzalloc() Date: Mon, 23 May 2022 19:04:50 +0200 Message-Id: <20220523165754.589700916@linuxfoundation.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220523165752.797318097@linuxfoundation.org> References: <20220523165752.797318097@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: stable@vger.kernel.org From: Xiaoke Wang [ Upstream commit 34123208bbcc8c884a0489f543a23fe9eebb5514 ] kzalloc() is a memory allocation function which can return NULL when some internal memory errors happen. So it is better to check the return value of it to prevent potential wrong memory access or memory leak. Signed-off-by: Xiaoke Wang Signed-off-by: Thomas Bogendoerfer Signed-off-by: Sasha Levin --- arch/mips/lantiq/falcon/sysctrl.c | 2 ++ arch/mips/lantiq/xway/gptu.c | 2 ++ arch/mips/lantiq/xway/sysctrl.c | 46 ++++++++++++++++++++----------- 3 files changed, 34 insertions(+), 16 deletions(-) diff --git a/arch/mips/lantiq/falcon/sysctrl.c b/arch/mips/lantiq/falcon/sysctrl.c index 82bbd0e2e298..714d92659489 100644 --- a/arch/mips/lantiq/falcon/sysctrl.c +++ b/arch/mips/lantiq/falcon/sysctrl.c @@ -169,6 +169,8 @@ static inline void clkdev_add_sys(const char *dev, unsigned int module, { struct clk *clk = kzalloc(sizeof(struct clk), GFP_KERNEL); + if (!clk) + return; clk->cl.dev_id = dev; clk->cl.con_id = NULL; clk->cl.clk = clk; diff --git a/arch/mips/lantiq/xway/gptu.c b/arch/mips/lantiq/xway/gptu.c index e304aabd6678..7d4081d67d61 100644 --- a/arch/mips/lantiq/xway/gptu.c +++ b/arch/mips/lantiq/xway/gptu.c @@ -124,6 +124,8 @@ static inline void clkdev_add_gptu(struct device *dev, const char *con, { struct clk *clk = kzalloc(sizeof(struct clk), GFP_KERNEL); + if (!clk) + return; clk->cl.dev_id = dev_name(dev); clk->cl.con_id = con; clk->cl.clk = clk; diff --git a/arch/mips/lantiq/xway/sysctrl.c b/arch/mips/lantiq/xway/sysctrl.c index e0af39b33e28..293ebb833659 100644 --- a/arch/mips/lantiq/xway/sysctrl.c +++ b/arch/mips/lantiq/xway/sysctrl.c @@ -313,6 +313,8 @@ static void clkdev_add_pmu(const char *dev, const char *con, bool deactivate, { struct clk *clk = kzalloc(sizeof(struct clk), GFP_KERNEL); + if (!clk) + return; clk->cl.dev_id = dev; clk->cl.con_id = con; clk->cl.clk = clk; @@ -336,6 +338,8 @@ static void clkdev_add_cgu(const char *dev, const char *con, { struct clk *clk = kzalloc(sizeof(struct clk), GFP_KERNEL); + if (!clk) + return; clk->cl.dev_id = dev; clk->cl.con_id = con; clk->cl.clk = clk; @@ -354,24 +358,28 @@ static void clkdev_add_pci(void) struct clk *clk_ext = kzalloc(sizeof(struct clk), GFP_KERNEL); /* main pci clock */ - clk->cl.dev_id = "17000000.pci"; - clk->cl.con_id = NULL; - clk->cl.clk = clk; - clk->rate = CLOCK_33M; - clk->rates = valid_pci_rates; - clk->enable = pci_enable; - clk->disable = pmu_disable; - clk->module = 0; - clk->bits = PMU_PCI; - clkdev_add(&clk->cl); + if (clk) { + clk->cl.dev_id = "17000000.pci"; + clk->cl.con_id = NULL; + clk->cl.clk = clk; + clk->rate = CLOCK_33M; + clk->rates = valid_pci_rates; + clk->enable = pci_enable; + clk->disable = pmu_disable; + clk->module = 0; + clk->bits = PMU_PCI; + clkdev_add(&clk->cl); + } /* use internal/external bus clock */ - clk_ext->cl.dev_id = "17000000.pci"; - clk_ext->cl.con_id = "external"; - clk_ext->cl.clk = clk_ext; - clk_ext->enable = pci_ext_enable; - clk_ext->disable = pci_ext_disable; - clkdev_add(&clk_ext->cl); + if (clk_ext) { + clk_ext->cl.dev_id = "17000000.pci"; + clk_ext->cl.con_id = "external"; + clk_ext->cl.clk = clk_ext; + clk_ext->enable = pci_ext_enable; + clk_ext->disable = pci_ext_disable; + clkdev_add(&clk_ext->cl); + } } /* xway socs can generate clocks on gpio pins */ @@ -391,9 +399,15 @@ static void clkdev_add_clkout(void) char *name; name = kzalloc(sizeof("clkout0"), GFP_KERNEL); + if (!name) + continue; sprintf(name, "clkout%d", i); clk = kzalloc(sizeof(struct clk), GFP_KERNEL); + if (!clk) { + kfree(name); + continue; + } clk->cl.dev_id = "1f103000.cgu"; clk->cl.con_id = name; clk->cl.clk = clk; -- 2.35.1