From nobody Mon Feb 9 21:37:15 2026 Received: from smtp87.ord1d.emailsrvr.com (smtp87.ord1d.emailsrvr.com [184.106.54.87]) (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 0DB5E35BDBF for ; Fri, 30 Jan 2026 17:04:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=184.106.54.87 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769792699; cv=none; b=k8XRyYGuxAplEYyer1I0ZlHbkW6jBCLlqd4afcvetGcVvz8xwCncgFMRvyr6fV5X/31EIRiDGYuaZk0XPpyAZC6j2J09/QZtJtK1dT+XjfacwDI4sKo57H36afbL1KfE3GjFKXLTi7PXO2VohnMJmmDRT0MYBLqJcLn24rusa/w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769792699; c=relaxed/simple; bh=49pyMBzeSZHCw6xBN0wnQawltZomg4O4ubc3Nki6NVs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=knxnTcVlaP98kM/KYN7g3pkOXMxICNgJZpgmORKQx/c91Uo1oNsqGwayffGPtWgySZUCvqsBt2iXB+mKwpwbKn3Ql8LLOxd8CGoFMPj25z8QHzwkYi5OzORk6sJgQ/4xmnv6TsOgv1L/KqcTjbmUXoUq2/UKGMnSEJ7rGd9oQEo= 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=OaBJzuwD; arc=none smtp.client-ip=184.106.54.87 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="OaBJzuwD" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=mev.co.uk; s=20221208-6x11dpa4; t=1769792697; bh=49pyMBzeSZHCw6xBN0wnQawltZomg4O4ubc3Nki6NVs=; h=From:To:Subject:Date:From; b=OaBJzuwDNGj74k1jLDQgSz+2gqJvXWbduNdOqVS8d+qKCYrpUES3b7X9+h7JPCui4 cJPQL8ffoojhKYMfnd/0XWL9LBue44bvYSdBsvn4Zf6P5cq/CNySbJeMB436t4tvhs pT9NpyXrradoFCm/CLBj/EqXYwy1WUQAo3pRj/PQ= X-Auth-ID: abbotti@mev.co.uk Received: by smtp19.relay.ord1d.emailsrvr.com (Authenticated sender: abbotti-AT-mev.co.uk) with ESMTPSA id 92BCB602FB; Fri, 30 Jan 2026 12:04:56 -0500 (EST) From: Ian Abbott To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , Ian Abbott , H Hartley Sweeten Subject: [PATCH 23/46] comedi: dt2817: Add sanity checks for I/O base address Date: Fri, 30 Jan 2026 16:47:48 +0000 Message-ID: <20260130170416.49994-24-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-24-1 Content-Type: text/plain; charset="utf-8" The "dt2817" driver uses an admin-supplied configuration option (`it->options[0]`) to configure the I/O port base address of a DT2817 board. It currently allows any base address to be configured but the hardware only supports base addresses (configured by on-board jumpers) in the range 0x200 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/dt2817.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/comedi/drivers/dt2817.c b/drivers/comedi/drivers/dt281= 7.c index 6738045c7531..9fd5b47c7fa7 100644 --- a/drivers/comedi/drivers/dt2817.c +++ b/drivers/comedi/drivers/dt2817.c @@ -103,7 +103,8 @@ static int dt2817_attach(struct comedi_device *dev, str= uct comedi_devconfig *it) int ret; struct comedi_subdevice *s; =20 - ret =3D comedi_request_region(dev, it->options[0], 0x5); + ret =3D comedi_check_request_region(dev, it->options[0], 0x5, + 0x200, 0x3ff, 8); if (ret) return ret; =20 --=20 2.51.0