From nobody Sat Jun 13 13:13:09 2026 Received: from cstnet.cn (smtp81.cstnet.cn [159.226.251.81]) (using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 67E5539E6E9 for ; Wed, 8 Apr 2026 08:17:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.81 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775636246; cv=none; b=OuCusg4h3KkFkN8jnS7CKFd+g4UtHtLkQqVeTy6P9BA3mQ/rUhWWd9pvoK77bZ0EWM1LU6qR1q9Khrhz1s2O07uLN4XLlPqR2UcYHM3Jtp36HY+h0oQs81DNeLts80WM34coBuJ2qR8576I0QuxDXg3eONY6DvLQlfsf5rKVLOM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775636246; c=relaxed/simple; bh=qiU+GIJBSh31CVJYmzfWkt2yBjIJTh/0WoJ6/Ca1y6o=; h=From:Date:Message-ID:To:Cc:In-Reply-To:References:Subject; b=jWnVILWjwe3OiLvvMNAWwHmCtftegG6I32CfuLSkpVbqjWMKoZke2Qo/SSwtijU2tgSmU9poMcGqt/ooi4UoKC4Ru6AproENc/yrwL88PO91u29dufE544OG6MYCuXD6rmXo19KQkilwVu1Xk/KZGXy3fbX+dbSZuXeM89S0FvE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn; spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.81 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iscas.ac.cn Received: from 0001-um-mconsole-v2.eml (unknown [111.196.245.116]) by APP-03 (Coremail) with SMTP id rQCowACXueAED9ZpM6pYDQ--.19818S2; Wed, 08 Apr 2026 16:17:09 +0800 (CST) From: Pengpeng Hou Date: Wed, 8 Apr 2026 15:35:13 +0800 Message-ID: <20260408160001.1-um-mconsole-v2-pengpeng@iscas.ac.cn> To: Richard Weinberger , Anton Ivanov , Johannes Berg Cc: Andrew Morton , Serge E. Hallyn , Christian Borntraeger , linux-um@lists.infradead.org, linux-kernel@vger.kernel.org, pengpeng@iscas.ac.cn In-Reply-To: <20260329030946.32410-1-pengpeng@iscas.ac.cn> References: <20260329030946.32410-1-pengpeng@iscas.ac.cn> Subject: [PATCH v2] um: mconsole: use bounded version string formatting X-CM-TRANSID: rQCowACXueAED9ZpM6pYDQ--.19818S2 X-Coremail-Antispam: 1UD129KBjvJXoWrZw4rKF1fCFW7trykJw18Zrb_yoW8Jr1fpF 98Z34qgrs3uw1UGryUtFnY93Z5G3Wvqr48Kw1kKw1UuF1DWFW0yFWSqa4jy3yDJrykGrW2 vFs8AF15CF45Jr7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUkq14x267AKxVW8JVW5JwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK02 1l84ACjcxK6xIIjxv20xvE14v26r4j6ryUM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26r4j 6F4UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s 0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xII jxv20xvE14v26r106r15McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr 1lF7xvr2IY64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7MxkF7I0En4kS14v26r1q6r43 MxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMI8I3I0E5I8CrVAFwI0_Jr 0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWUtVW8ZwCIc40Y0x0E wIxGrwCI42IY6xIIjxv20xvE14v26r1j6r1xMIIF0xvE2Ix0cI8IcVCY1x0267AKxVW8JV WxJwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Jr0_Gr1lIxAI cVC2z280aVCY1x0267AKxVW8JVW8JrUvcSsGvfC2KfnxnUUI43ZEXa7VU13ku3UUUUU== X-CM-SenderInfo: pshqw1xhqjqxpvfd2hldfou0/ Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" mconsole_version() formats several UTS strings into a fixed 256-byte local buffer with sprintf() and no length bound. Use snprintf() so the version reply stays within the local buffer. Fixes: e9ff3990f08e ("[PATCH] namespaces: utsname: switch to using uts name= spaces") Signed-off-by: Pengpeng Hou --- Changes since v1: - wrap the changelog paragraphs to 72 columns --- arch/um/drivers/mconsole_kern.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_ker= n.c index e2a9e8879f58..18d0ec15557c 100644 --- a/arch/um/drivers/mconsole_kern.c +++ b/arch/um/drivers/mconsole_kern.c @@ -106,9 +106,9 @@ void mconsole_version(struct mc_request *req) { char version[256]; =20 - sprintf(version, "%s %s %s %s %s", utsname()->sysname, - utsname()->nodename, utsname()->release, utsname()->version, - utsname()->machine); + snprintf(version, sizeof(version), "%s %s %s %s %s", + utsname()->sysname, utsname()->nodename, utsname()->release, + utsname()->version, utsname()->machine); mconsole_reply(req, version, 0, 0); } =20 --=20 2.50.1 (Apple Git-155)