From nobody Thu Apr 2 12:22:22 2026 Received: from cstnet.cn (smtp21.cstnet.cn [159.226.251.21]) (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 417F32C21E6 for ; Sun, 29 Mar 2026 03:10:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.21 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774753804; cv=none; b=JqR22jqdHy9XIz98SHwNHpEgQmf1pSXS6a6KE9adGLH2gG5z09FQaBigxhVjjH6PIxJHSoV1t5mCxt9fRozz9t7lYmcFdcHXvdxsyCM3AUA7AGIl/U0Rl6VjDbpDy9zro7X5SzQ/rBjCEpPXWOt92JOURz4Swg+LIGdkz4x7xd4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774753804; c=relaxed/simple; bh=Ze7geqckBMRTCK22GCFTT4wgEpATUE3+7gUfLAnqKCA=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=bc6EJtR+zV+1p2swkQu3DumShRDMj08d/dtkg9L3bIq/GOqx1GAyfA6/CBHpFy+6N641To3ma1PFf5dztcLlFmVfFQx8zMOBiG0JSgKhc39T46/MfuUJaRVcGpPT7wP6AZWKU8NITNWT3KS2dXM4tmdio7dxwmgb/DPtTh3ux/U= 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=159.226.251.21 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 localhost.localdomain (unknown [111.196.245.197]) by APP-01 (Coremail) with SMTP id qwCowAAXvWj6l8hpnOd8Cw--.20596S2; Sun, 29 Mar 2026 11:09:47 +0800 (CST) From: Pengpeng Hou To: richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net Cc: akpm@osdl.org, sergeh@kernel.org, clg@fr.ibm.com, linux-um@lists.infradead.org, linux-kernel@vger.kernel.org, pengpeng@iscas.ac.cn Subject: [PATCH] um: mconsole: use bounded version string formatting Date: Sun, 29 Mar 2026 11:09:46 +0800 Message-ID: <20260329030946.32410-1-pengpeng@iscas.ac.cn> X-Mailer: git-send-email 2.50.1 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-CM-TRANSID: qwCowAAXvWj6l8hpnOd8Cw--.20596S2 X-Coremail-Antispam: 1UD129KBjvdXoWrZw4rKF1fCFW7trykGFyDZFb_yoWkCrcEv3 4aqwn5Gayftr18Xr1DA39Iy3y0yws8Kr4kta1ktFWfAw1rurs7uFZ0vr1qgw1UXw48WFn3 C347AryjkryUGjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUb4kFF20E14v26r4j6ryUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Xr0_Ar1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Cr0_ Gr1UM28EF7xvwVC2z280aVAFwI0_Cr1j6rxdM28EF7xvwVC2z280aVCY1x0267AKxVWxJr 0_GcWle2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E 2Ix0cI8IcVAFwI0_JF0_Jw1lYx0Ex4A2jsIE14v26r1j6r4UMcvjeVCFs4IE7xkEbVWUJV W8JwACjcxG0xvY0x0EwIxGrwACjI8F5VA0II8E6IAqYI8I648v4I1lc7CjxVAaw2AFwI0_ Jw0_GFyl42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67 AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r1q6r43MIIY rxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_JFI_Gr1lIxAIcVC0I7IYx2IY6xkF7I0E14 v26r4j6F4UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVWUJVW8 JwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWIevJa73UjIFyTuYvjfUoq2MUU UUU X-CM-SenderInfo: pshqw1xhqjqxpvfd2hldfou0/ 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 --- 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)