From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=198.175.65.12 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793283332; b=wrrJwvTJDruQHCIEeyvNFNAWzxIwT/gBgWxFM6UcB3R5AJ6GF1sMhw2ixh3mEiCWGfz5 tgEqoNBsueQQKwV/wzcY984dTRKdKjXq0u17D6P4Cq+7oF4CHZwz+lawDqigSk/0OYDtp 46cO1RcFKOFfkfAYRfVbeYzqA+fqdJcV6R7FaHi/dZbu7Z53MzR0yjRLc54OW5N88eVh1 1X2AlDb8gtrxxO1azyvssrXilee9fX8RW6pbl6C6MOrSkvzkONWmRsjhi6BGNWo6sCGeH qlPVngPIc/Xn/PTe3Xf+TuCxMx2AWiPIOHBJvEib6PbeBCE+1+l8OQcSZHOCuXQ6iDg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793283332; h=DMARC-Filter:DKIM-Signature:X-CSE-ConnectionGUID:X-CSE-MsgGUID: X-IronPort-AV:X-IronPort-AV:Received:X-CSE-ConnectionGUID: X-CSE-MsgGUID:X-ExtLoop1:X-IronPort-AV:Received:Date:From:To:Cc: Subject:Message-ID:References:MIME-Version:Content-Type: Content-Disposition:In-Reply-To:Organization; bh=FXCuaVCpwWottBu6pKn0235JvcEeLrLl5Q+bEkHQaYw=; b=StIYOED3oOisVxy7AsG5C3jWyTp9db2j/2QLoi9WZCx/SQyQfnvTgw1KxUOezMV+YMVi fI6UnbcCYnmALnuh2EiYP914s8aojJoZaxF/d2qZQhXa5xQG5TZRsC/FJAVoTXwdMVHQc NcjjJmUePqqoFhuJjJF4iSZxVfZtCg2X3WjqLJdIfHP0ivdq7iIukerWn0I+5Tom3z3he Jb8q0arUelVyDi/MOIohFGU8tT3Ha7H0nch+AyrEj6eysEhglkzd1vqFRmYVwe5PaWI+r 3CiijQws1pTHIzhkUnKTeNdo92yuAJjr8PNxSkjP2iMXGGDMadjC+V6lICgF9wzJs4g== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=linux.intel.com; spf=pass smtp.mailfrom=linux.intel.com; dkim=pass header.d=intel.com header.i=@intel.com header.a=rsa-sha256 header.s=Intel header.b=j8pbvOeR; arc=none smtp.remote-ip=198.175.65.12 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.12]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5DDB0606A338; Thu, 29 Oct 2026 14:15:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 5DDB0606A338 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=intel.com header.i=@intel.com header.a=rsa-sha256 header.s=Intel header.b=j8pbvOeR DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1793283332; x=1824819332; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=paK5BtdnHvkl9MWSDM60ujXzIQ0HaPpBPCelVsr0Pp4=; b=j8pbvOeRjooXJjh6BjtQOdUrPFu/oBz2Yt+k1kiFgoeS/VGlAzmmS3Q2 VEu/sEZNXmqah/vNcBD2NHp+KYhlggcxqyH/sf+0HsH4JPuChXVZ9WwoT Lrg1iqll1PLLYcGGV6rbboTUaZ4+eeHR1oBXrRRpWEfttoXje5pTuXZpM 1JsnJmyO+bhnmSHEugeodE5dlEig10cnzd59v/UAhG8ZZjTNw9HnDEF9o /R0FzXXZbuX+IDs+Mb/m4av36dz2TFbrsUQu4QSrqiKslJQy6fskFbX1I NYaOxsRRNV45c4UqZdudZ473bkzwyDnDCSO8jOf1nSa9eIA5B7etm+Bwb g==; X-CSE-ConnectionGUID: 5CUChUjVQJiXyMdxvmpImw== X-CSE-MsgGUID: dD1Xq/jWTy2vrjyL+CFNfQ== X-IronPort-AV: E=McAfee;i="6800,10657,11949"; a="1909669" X-IronPort-AV: E=Sophos;i="6.27,184,1787036400"; d="scan'208";a="1909669" Received: from fmviesa011.fm.intel.com ([10.60.135.151]) by orvoesa104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Oct 2026 07:15:31 -0700 X-CSE-ConnectionGUID: gdXbYC5HQWC+X7Xakw3OSA== X-CSE-MsgGUID: zDN3ZckETP2ibAHWTm4tWQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,184,1787036400"; d="scan'208";a="6991104" Received: from ncintean-mobl1.ger.corp.intel.com (HELO localhost) ([10.245.245.129]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Oct 2026 07:15:28 -0700 Date: Thu, 29 Oct 2026 16:15:26 +0200 From: Andy Shevchenko To: Alejandro Colomar Cc: Kees Cook , Steven Rostedt , Bill Wendling , Petr Mladek , Randy Dunlap , Shuvam Pandey , linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org Subject: Re: [PATCH] seq_buf: Mark a seq_buf overflowed when terminating it loses a byte Message-ID: References: <20261029053250.i.220-kees@kernel.org> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Organization: Intel Finland Oy - BIC 0357606-4 - c/o Alberga Business Park, 6 krs, Bertel Jungin Aukio 5, 02600 Espoo On Thu, Oct 29, 2026 at 12:47:04PM +0100, Alejandro Colomar wrote: ... > How about not allowing a full buffer without a NUL terminator in the > first place? /dev/null is perfectly valid device, although I dunno if seq_but designed in a way to support this case. -- With Best Regards, Andy Shevchenko