From nobody Tue Feb 10 05:44:08 2026 Received: from smtp82.ord1d.emailsrvr.com (smtp82.ord1d.emailsrvr.com [184.106.54.82]) (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 DF22135E54C for ; Fri, 30 Jan 2026 17:11:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=184.106.54.82 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769793113; cv=none; b=UQlNZzGDdCOKz1hYj+afOWmOhNZWo3Um22RtUAhp5PDqlUfy6rTHlO1bB2pPxl6Eyri33WGEUflfKskvbt78P5V0sRTmM9d0Q8JDcvIVi0uGAtBUHtOOQLDSyfSjcpZ6qqblFtNw+4VNnvYqs6WZiHSmXqYhpp2ZAXC+PGOZ3fQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769793113; c=relaxed/simple; bh=0xEm8a+11lY/mX+NcqVJI4HuYL+R2PAUHG3/97SinGI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=dNSfLZNP0firmodXBLyYApl2VqPN9dTUbgx7sDoRVn3FdcgrKxhucLFHSTH2NXkd565bPzUJOhklhA0Lk/S1NXk2zXcf9soMOEJp6PUqergKByJmOC1E1k1ZZZjGXtXGVrkHIjcZMox++UBBazub4XFw6dP0YTt18CYF8FJR0K8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=mev.co.uk; spf=pass smtp.mailfrom=mev.co.uk; dkim=pass (1024-bit key) header.d=mev.co.uk header.i=@mev.co.uk header.b=lCioFvO6; arc=none smtp.client-ip=184.106.54.82 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=mev.co.uk Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mev.co.uk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=mev.co.uk header.i=@mev.co.uk header.b="lCioFvO6" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=mev.co.uk; s=20221208-6x11dpa4; t=1769792688; bh=0xEm8a+11lY/mX+NcqVJI4HuYL+R2PAUHG3/97SinGI=; h=From:To:Subject:Date:From; b=lCioFvO6wSZGLUsByD+hTw2Rg0jwHY63cCaY0FfbuFiv+pWtdUYxspjxziizhzrMz X0EGw8/1LyMUJMVGhLd+F1CwAEWJtMSTiP+FNFbI3bhaNsaSzcdnqJ2/325EUOKeDP wo8rnGVWamrap7VZRik31YiVkM/94VPQri4YoAm8= X-Auth-ID: abbotti@mev.co.uk Received: by smtp19.relay.ord1d.emailsrvr.com (Authenticated sender: abbotti-AT-mev.co.uk) with ESMTPSA id B7F06602F1; Fri, 30 Jan 2026 12:04:47 -0500 (EST) From: Ian Abbott To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , Ian Abbott , H Hartley Sweeten Subject: [PATCH 17/46] comedi: das800: Add sanity checks for I/O base address Date: Fri, 30 Jan 2026 16:47:42 +0000 Message-ID: <20260130170416.49994-18-abbotti@mev.co.uk> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260130170416.49994-1-abbotti@mev.co.uk> References: <20260130170416.49994-1-abbotti@mev.co.uk> 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-Classification-ID: 429d5722-7f90-4557-8586-08913fa85e9e-18-1 Content-Type: text/plain; charset="utf-8" The "das800" driver uses an admin-supplied configuration option (`it->options[0]`) to configure the I/O port base address of a supported board in the DAS800 family. It currently allows any base address to be configured but the hardware only supports base addresses (configured by an on-board DIP switch) in the range 0 to 0x3f8 on 8-byte boundaries. Add a sanity check to ensure the device is not configured at an unsupported base address. Signed-off-by: Ian Abbott --- drivers/comedi/drivers/das800.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/comedi/drivers/das800.c b/drivers/comedi/drivers/das80= 0.c index 300775523031..7563f40a4023 100644 --- a/drivers/comedi/drivers/das800.c +++ b/drivers/comedi/drivers/das800.c @@ -655,7 +655,8 @@ static int das800_attach(struct comedi_device *dev, str= uct comedi_devconfig *it) if (!devpriv) return -ENOMEM; =20 - ret =3D comedi_request_region(dev, it->options[0], 0x8); + ret =3D comedi_check_request_region(dev, it->options[0], 0x8, + 0, 0x3ff, 8); if (ret) return ret; =20 --=20 2.51.0