From nobody Sat Dec 27 05:15:21 2025 Received: from szxga04-in.huawei.com (szxga04-in.huawei.com [45.249.212.190]) (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 2D9DF524C9 for ; Mon, 25 Dec 2023 15:03:13 +0000 (UTC) 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 [172.19.88.234]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4SzLk33TNSz1wpF1; Mon, 25 Dec 2023 23:02:51 +0800 (CST) Received: from dggpemd200001.china.huawei.com (unknown [7.185.36.224]) by mail.maildlp.com (Postfix) with ESMTPS id AEAD41400D5; Mon, 25 Dec 2023 23:03:11 +0800 (CST) Received: from huawei.com (10.175.104.67) by dggpemd200001.china.huawei.com (7.185.36.224) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.2.1258.28; Mon, 25 Dec 2023 23:03:10 +0800 From: ZhaoLong Wang To: , , CC: , , , , , Subject: [PATCH V6 4/5] ubi: Reserve sufficient buffer length for the input mask Date: Mon, 25 Dec 2023 23:00:48 +0800 Message-ID: <20231225150049.183756-5-wangzhaolong1@huawei.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231225150049.183756-1-wangzhaolong1@huawei.com> References: <20231225150049.183756-1-wangzhaolong1@huawei.com> 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: dggems703-chm.china.huawei.com (10.3.19.180) To dggpemd200001.china.huawei.com (7.185.36.224) Content-Type: text/plain; charset="utf-8" Because the mask received by the emulate_failures interface is a 32-bit unsigned integer, ensure that there is sufficient buffer length to receive and display this value. Signed-off-by: ZhaoLong Wang Reviewed-by: Zhihao Cheng --- drivers/mtd/ubi/debug.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/mtd/ubi/debug.c b/drivers/mtd/ubi/debug.c index 007f82d71020..d57f52bd2ff3 100644 --- a/drivers/mtd/ubi/debug.c +++ b/drivers/mtd/ubi/debug.c @@ -332,7 +332,7 @@ static ssize_t dfs_file_read(struct file *file, char __= user *user_buf, struct dentry *dent =3D file->f_path.dentry; struct ubi_device *ubi; struct ubi_debug_info *d; - char buf[8]; + char buf[16]; int val; =20 ubi =3D ubi_get_device(ubi_num); @@ -400,7 +400,7 @@ static ssize_t dfs_file_write(struct file *file, const = char __user *user_buf, struct ubi_device *ubi; struct ubi_debug_info *d; size_t buf_size; - char buf[8] =3D {0}; + char buf[16] =3D {0}; int val; =20 ubi =3D ubi_get_device(ubi_num); --=20 2.39.2