From nobody Mon Feb 9 19:25:49 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 4D199387563 for ; Fri, 30 Jan 2026 17:05:19 +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=1769792720; cv=none; b=aiWXYaLJuTwTMoExnQ9la4vQOlJm1bHghw0lybrayLFNKSJGImU2nbw+3Zh8AmYlCghWKzUT0k3wOBNog0jf/xu0dr1nKdkyRmb1JOMKCAzd4PVUMa3ibU2qY8ZNkTpuToz/Amy0zUg9vSAv1lm5PHpXR5y+J8qP9GlgGbpBckw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769792720; c=relaxed/simple; bh=GDdg7RCvxWuARJkYdHopc1UvAFkwWp3JbHbW2B8QB38=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=rzkqO9v76GzKH3n9w1KJN0r7pnqd6aV+nLVPbuWfyL4JTkZypsXvvlO4vTAvH2LjPh3raLL1Bo4sZAYpjadFQYKmvl5b2KqMgy+hTBzuEG+UJyrsNolfPB8UjbXb3PbvfzGNcRAw3DnMTb/Xn6sVfFwZ7c44VV9AMYCxPhs+VSE= 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=bcewaUyB; 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="bcewaUyB" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=mev.co.uk; s=20221208-6x11dpa4; t=1769792718; bh=GDdg7RCvxWuARJkYdHopc1UvAFkwWp3JbHbW2B8QB38=; h=From:To:Subject:Date:From; b=bcewaUyBMutDU54sNJf4x9hgaFMZAzh3JDnDFBEaeVfDpIEB39MK799oo6D4rqy2S xG0RE+yqhIKB7QoOGkaWPPAm16SMWI2LWSFl1wGHwmZqWufx8soY17R7FsC4gxOW36 cxhx8YUm9dR8BOoVSxV/vkTtKnjqoeLNqTU2mK2I= X-Auth-ID: abbotti@mev.co.uk Received: by smtp19.relay.ord1d.emailsrvr.com (Authenticated sender: abbotti-AT-mev.co.uk) with ESMTPSA id 20EA6602A3; Fri, 30 Jan 2026 12:05:18 -0500 (EST) From: Ian Abbott To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , Ian Abbott , H Hartley Sweeten Subject: [PATCH 44/46] comedi: rti800: Add sanity checks for I/O base address Date: Fri, 30 Jan 2026 16:48:09 +0000 Message-ID: <20260130170416.49994-45-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-45-1 Content-Type: text/plain; charset="utf-8" The "rti800" driver uses an admin-supplied configuration option (`it->options[0]`) to configure the I/O port base address of a RTI-800 or RTI-815 board. It currently allows any base address to be configured but the hardware only supports base addresses (configured by on-board DIP switches) in the range 0 to 0x3F0 on 16-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/rti800.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/comedi/drivers/rti800.c b/drivers/comedi/drivers/rti80= 0.c index 1b02e47bdb4c..fa3965cf92f2 100644 --- a/drivers/comedi/drivers/rti800.c +++ b/drivers/comedi/drivers/rti800.c @@ -257,7 +257,8 @@ static int rti800_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], 0x10); + ret =3D comedi_check_request_region(dev, it->options[0], 0x10, + 0, 0x3ff, 16); if (ret) return ret; =20 --=20 2.51.0