From nobody Sun Dec 14 19:30:17 2025 Received: from mail.nfschina.com (unknown [42.101.60.213]) by smtp.subspace.kernel.org (Postfix) with SMTP id 224223FBB3; Mon, 21 Apr 2025 06:15:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=42.101.60.213 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745216144; cv=none; b=aKpWt3Tn0hBNdvzUhI9vyi8HD9vT0V/hMuOx02A8JCWgHHuinQ4VO9fNYR4JsHqjjOzugjCxsPYTXQ4/TPLR+rdkmSoGfnS09w5RdKEICydj4K8aQMIoAt5z/H2siw9gU6LtKrvFnzqnt0lK6moYFrGPuZuHtZj6s6eSLCJliO8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745216144; c=relaxed/simple; bh=pexuyVUdAl62EN1tiqiLq2qywE+Axu5IlyyjKJWJtBE=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=BMn5Dh3g7UVcF+SrHti5ENBO9EowoZXb/i+ZMwcvpYW5yfqdW9R2b5zaNM1VFwl5X9Pofh5X4D+pczFJxJ4G361mcDSJdIlncj36KV7JGwQGx6guHijlUQeUMTVw/0GoqrVz4xSTfHQNqLjPmIMJHPR6u7g1FO5twr4bMgOfQ6U= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=nfschina.com; spf=pass smtp.mailfrom=nfschina.com; arc=none smtp.client-ip=42.101.60.213 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=nfschina.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=nfschina.com Received: from longsh.shanghai.nfschina.local (unknown [180.167.10.98]) by mail.nfschina.com (MailData Gateway V2.8.8) with ESMTPSA id 2D27660252AFC; Mon, 21 Apr 2025 14:15:30 +0800 (CST) X-MD-Sfrom: suhui@nfschina.com X-MD-SrcIP: 180.167.10.98 From: Su Hui To: dave@stgolabs.net, paulmck@kernel.org, josh@joshtriplett.org, frederic@kernel.org, neeraj.upadhyay@kernel.org, joel@joelfernandes.org, boqun.feng@gmail.com, urezki@gmail.com, rostedt@goodmis.org, mathieu.desnoyers@efficios.com, jiangshanlai@gmail.com, qiang.zhang1211@gmail.com Cc: Su Hui , linux-kernel@vger.kernel.org, rcu@vger.kernel.org, kernel-janitors@vger.kernel.org, linux-hardening@vger.kernel.org Subject: [PATCH] rcuscale: using kmalloc_array() to relpace kmalloc() Date: Mon, 21 Apr 2025 14:15:09 +0800 Message-Id: <20250421061508.718752-1-suhui@nfschina.com> X-Mailer: git-send-email 2.30.2 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 Content-Type: text/plain; charset="utf-8" It's safer to using kmalloc_array() because it can prevent overflow problem. Signed-off-by: Su Hui --- kernel/rcu/rcuscale.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/rcu/rcuscale.c b/kernel/rcu/rcuscale.c index 0f3059b1b80d..cbe2195f08d6 100644 --- a/kernel/rcu/rcuscale.c +++ b/kernel/rcu/rcuscale.c @@ -762,7 +762,7 @@ kfree_scale_thread(void *arg) } =20 for (i =3D 0; i < kfree_alloc_num; i++) { - alloc_ptr =3D kmalloc(kfree_mult * sizeof(struct kfree_obj), GFP_KERNEL= ); + alloc_ptr =3D kmalloc_array(kfree_mult, sizeof(struct kfree_obj), GFP_K= ERNEL); if (!alloc_ptr) return -ENOMEM; =20 --=20 2.30.2