From nobody Fri Dec 19 10:42:47 2025 Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) (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 ECB10328DB for ; Wed, 28 Aug 2024 07:14:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.188 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724829269; cv=none; b=SEMRocWzxkf43etbES2dHipIbcH45/7wjExu0NJiNZb1Hlo4I3bfRLU2Kjp0PGBsynktrs89wlzVO0j7QYFdFBKYvVn7iiZV9v8LPpFVgSy4WmLp93KC39Ccv/cc9qt21JDkQ/ZICvoWVYBh/mNaVzyORAFkjdkNEQ2bd62DgEk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724829269; c=relaxed/simple; bh=MLxsYjshGA9NSvX977x358JfgU4Vpz9sQSh1uAlc+3s=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=HhkEw5JhcIxjp37ZSBj8gVykSWjBwmN0h1PHLgLXXRJt4ZCZ9Q5NOqPCw+we0JdZYH/tl5KY+9CLk8OcV1i+Qml8R9EDCtJUBD02sOp1/jqDqwMRcvQuE53Izzj+Y/7wTBKs7t4zXRxmTZPtbFsSdAXS/WFu7M6J4VC1D70TShk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=45.249.212.188 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.19.88.194]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4WtwbZ0JJfzpTtv for ; Wed, 28 Aug 2024 15:12:42 +0800 (CST) Received: from kwepemh500013.china.huawei.com (unknown [7.202.181.146]) by mail.maildlp.com (Postfix) with ESMTPS id CDEA0140202 for ; Wed, 28 Aug 2024 15:14:23 +0800 (CST) Received: from huawei.com (10.90.53.73) by kwepemh500013.china.huawei.com (7.202.181.146) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Wed, 28 Aug 2024 15:14:23 +0800 From: Jinjie Ruan To: , CC: Subject: [PATCH -next] genirq/msi: Use kmemdup_array() instead of kmemdup() for multiple allocation Date: Wed, 28 Aug 2024 15:22:19 +0800 Message-ID: <20240828072219.1249250-1-ruanjinjie@huawei.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To kwepemh500013.china.huawei.com (7.202.181.146) Content-Type: text/plain; charset="utf-8" Let kmemdup_array() take care about multiplication and possible overflows. Signed-off-by: Jinjie Ruan --- kernel/irq/msi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c index ca6e2ae6d6fc..3a24d6b5f559 100644 --- a/kernel/irq/msi.c +++ b/kernel/irq/msi.c @@ -82,7 +82,7 @@ static struct msi_desc *msi_alloc_desc(struct device *dev= , int nvec, desc->dev =3D dev; desc->nvec_used =3D nvec; if (affinity) { - desc->affinity =3D kmemdup(affinity, nvec * sizeof(*desc->affinity), GFP= _KERNEL); + desc->affinity =3D kmemdup_array(affinity, nvec, sizeof(*desc->affinity)= , GFP_KERNEL); if (!desc->affinity) { kfree(desc); return NULL; --=20 2.34.1