From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0FE93149000; Fri, 23 Aug 2024 08:56:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724403374; cv=none; b=a2jmxj8DzTLCV5T+DW7ojo5zxHtrs/KSKK8QtxmTe/+tpIg9tNEA/R+yv2eJFEfU72y31NbyNwkUmMRr9BYs5ke3jIAw91msupfve+cHV83c0hwVsohxEuwzGeo+nXYEO/Qesq9yiTkshM+z1RIW329i3OXKZNcfns3hvJg/kgA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724403374; c=relaxed/simple; bh=i0Xu0ojMn57FvVAOLSwT/qbq3Voen/aPH4CicZkeue4=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=BOKJd9vHNCPJW6l4tWRuUVEnQETa5svhBWi77TOWzqXgv9Z23aIclAWKbGXXKZAG45AzZP8wmA2o0lozaoscQQ5XMdymk7wBcjlvZ/N82FUtagAk0Du4IGUK5MyjJm7AJUYZkUIcPZ7aY+exPW+Sjz09SeqpU8pGyyekJh5EXz8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=hSPHkyXw; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="hSPHkyXw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 255CBC32786; Fri, 23 Aug 2024 08:56:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1724403373; bh=i0Xu0ojMn57FvVAOLSwT/qbq3Voen/aPH4CicZkeue4=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=hSPHkyXwI86QVCzoy22Vd8ASUmGw2QWWlVCxaDiVnCbjNF+FvH7jRJUiVhMlauhcI Y7t3BtPoPYjuv9QJ2/Vc48Wv4C23x5/Ua5J3f0BLJxZyeTZcXOktYp7V9gRobOcBmN Q8uF+5vWcjSRfAs768OcSaS1R83jX3/tGJ4Wwwj7qlrRKw1s17FxzjPiqLcJzycHDP 3jSg2utBfX15hzwtL/lgAVVYGd+VIcs9maeZsIuVZgaD6ooNyNZoOEI0DyojddvCrV OGcX3nDFwpdqSvYun2njrLnVu2JqHNpfVSzUHZGqXQ6jMVJ0DZj1unNEMFIObG6N8x 0582IQMbCCK8g== Message-ID: Date: Fri, 23 Aug 2024 10:56:07 +0200 Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1] drivers/pinctrl/samsung: Use kmemdup_array instead of kmemdup for multiple allocation To: Shen Lichuan , s.nawrocki@samsung.com, linus.walleij@linaro.org Cc: alim.akhtar@samsung.com, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, opensource.kernel@vivo.com References: <20240823082407.48219-1-shenlichuan@vivo.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 23/08/2024 10:24, Shen Lichuan wrote: > Let the kememdup_array() take care about > multiplication and possible overflows. > > Using kmemdup_array() is more appropriate > and makes the code easier to audit. Please wrap commit message according to Linux coding style / submission process (neither too early nor over the limit): https://elixir.bootlin.com/linux/v6.4-rc1/source/Documentation/process/submitting-patches.rst#L597 > > Signed-off-by: Shen Lichuan > --- > drivers/pinctrl/samsung/pinctrl-samsung.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/pinctrl/samsung/pinctrl-samsung.c b/drivers/pinctrl/samsung/pinctrl-samsung.c > index e4464ee815f9..da24890f27f7 100644 > --- a/drivers/pinctrl/samsung/pinctrl-samsung.c > +++ b/drivers/pinctrl/samsung/pinctrl-samsung.c > @@ -122,8 +122,8 @@ static int add_map_configs(struct device *dev, struct pinctrl_map **map, > if (WARN_ON(*num_maps == *reserved_maps)) > return -ENOSPC; > > - dup_configs = kmemdup(configs, num_configs * sizeof(*dup_configs), > - GFP_KERNEL); > + dup_configs = kmemdup_array(configs, num_configs, > + sizeof(*dup_configs), GFP_KERNEL); Misaligned and wrapped too early. > Best regards, Krzysztof