From nobody Mon Feb 9 22:59:53 2026 Received: from smtp86.ord1d.emailsrvr.com (smtp86.ord1d.emailsrvr.com [184.106.54.86]) (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 E2C3835FF78 for ; Fri, 30 Jan 2026 17:04:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=184.106.54.86 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769792695; cv=none; b=r9iP1gMp3MR3iMFL1Kpez+15ClUtgIEMDApY5R9c6c9tZi7EKV1xZApOWgp4zHDBdG0Lacqc1c3chL55uuTd83ihJeF032ZRdLWYuTg6sDpYBt4aeG4hIF6X+C//XAqACwEXlW/7R8p3Vi+fDqAu4VyJFw8qckMh/Vk9rsRCNs0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769792695; c=relaxed/simple; bh=iLoMF3hOLmC6Hhj13m6egLYOVU67/PY9Spjd1su+fOk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=NPS8FZWwtKJ/laKtmSoy4jUfnokVv5rSQoT2UNsTAEZDNdpX01ECTyK8mE9cUoAy4g3C8GPg1BZyvqfAyaBjMD0nPcuDwxHnmkPKXIfJt0wpvNxVr5GAQruFbWBXgBhqijaAtzLDotvKKxCMe+FNzhPXHTdII2F0iL8OpfMi0qY= 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=btS/8zJ8; arc=none smtp.client-ip=184.106.54.86 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="btS/8zJ8" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=mev.co.uk; s=20221208-6x11dpa4; t=1769792693; bh=iLoMF3hOLmC6Hhj13m6egLYOVU67/PY9Spjd1su+fOk=; h=From:To:Subject:Date:From; b=btS/8zJ8WxAx5FN0E/j0BAAqb9am8aH7LojIXc5HNfH1tiUcYAMWBIXONDNuBtRT/ kTDqr4YldMiVok7V9Z1uGp1jHYbOns2J8+LMCKAgOx9kQJkogyn4awmLf2QWt+2pDy nIbaqkYmlcEY9k8W5Um+jFhBMEtbUYZMv9LQQQD4= X-Auth-ID: abbotti@mev.co.uk Received: by smtp19.relay.ord1d.emailsrvr.com (Authenticated sender: abbotti-AT-mev.co.uk) with ESMTPSA id 51F5B60300; Fri, 30 Jan 2026 12:04:52 -0500 (EST) From: Ian Abbott To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , Ian Abbott , H Hartley Sweeten Subject: [PATCH 21/46] comedi: dt2814: Add sanity checks for I/O base address Date: Fri, 30 Jan 2026 16:47:46 +0000 Message-ID: <20260130170416.49994-22-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-22-1 Content-Type: text/plain; charset="utf-8" The "dt2814" driver uses an admin-supplied configuration option (`it->options[0]`) to configure the I/O port base address of a DT2814 board. 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 0x200 to 0x3fe on 2-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/dt2814.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/comedi/drivers/dt2814.c b/drivers/comedi/drivers/dt281= 4.c index c98a5a4a7aec..caec16482afb 100644 --- a/drivers/comedi/drivers/dt2814.c +++ b/drivers/comedi/drivers/dt2814.c @@ -305,7 +305,8 @@ static int dt2814_attach(struct comedi_device *dev, str= uct comedi_devconfig *it) struct comedi_subdevice *s; int ret; =20 - ret =3D comedi_request_region(dev, it->options[0], 0x2); + ret =3D comedi_check_request_region(dev, it->options[0], 0x2, + 0x200, 0x3ff, 2); if (ret) return ret; =20 --=20 2.51.0