From nobody Tue Feb 10 05:44:05 2026 Received: from smtp85.ord1d.emailsrvr.com (smtp85.ord1d.emailsrvr.com [184.106.54.85]) (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 0323E364E9A for ; Fri, 30 Jan 2026 17:04:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=184.106.54.85 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769792700; cv=none; b=Qw+gxOt/sW67g89Cna3wn1EjfaYXujVJWFlS4rR5e49Oao5uCTvKD/MSP2Mml/LN7tEvGgTrt057WiUEIJ69T23Vg7CZDAuPMKt3x671O4FR9aAL6EecpmB9Q1HOYoClUWO7R/UEWGM+zrc0Ol54vhWdjWjaXzdiJkdEOm2cnB4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769792700; c=relaxed/simple; bh=hH+cmrwnlCK1REUtDUDW2TUtxxy3/LPP7hs7hRNUO5c=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=psuys41dVzMp8MFrtEKS01QTQpfkKoLIcBLMbf7XYfnZF6Wmu4IFw3t8V/5X0BhRsSh2mpHipi20xOnnl72sepHHSC+mPy/eSxAvpoEGP4wptkNURu4tPIMV9bqTLB4FIqJmKl9zinbv4IpNO7ZnW+rjaixLpbembFXxBpRngr8= 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=aHwZzHZH; arc=none smtp.client-ip=184.106.54.85 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="aHwZzHZH" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=mev.co.uk; s=20221208-6x11dpa4; t=1769792696; bh=hH+cmrwnlCK1REUtDUDW2TUtxxy3/LPP7hs7hRNUO5c=; h=From:To:Subject:Date:From; b=aHwZzHZHs1bT9H0qxUCFIooh8FxtJDrK/7CXJHatw0yJmx4ClCZLKjXRCOQ1pcHNS 5FrY3vSjfslYVeefAzzSknlHjq7F3fyGHYVT+nDQ4hVnDjAj8Lrg+5z8bMhPq9+Y3Q uArOuiBkMfuhH+HqcDsO4RqLasvZqA+hkqMrPlkM= X-Auth-ID: abbotti@mev.co.uk Received: by smtp19.relay.ord1d.emailsrvr.com (Authenticated sender: abbotti-AT-mev.co.uk) with ESMTPSA id 71361602FA; Fri, 30 Jan 2026 12:04:54 -0500 (EST) From: Ian Abbott To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , Ian Abbott , H Hartley Sweeten Subject: [PATCH 22/46] comedi: dt2815: Add sanity checks for I/O base address Date: Fri, 30 Jan 2026 16:47:47 +0000 Message-ID: <20260130170416.49994-23-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-23-1 Content-Type: text/plain; charset="utf-8" The "dt2815" driver uses an admin-supplied configuration option (`it->options[0]`) to configure the I/O port base address of a DT2815 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/dt2815.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/comedi/drivers/dt2815.c b/drivers/comedi/drivers/dt281= 5.c index 03ba2fd18a21..3fa184451523 100644 --- a/drivers/comedi/drivers/dt2815.c +++ b/drivers/comedi/drivers/dt2815.c @@ -144,7 +144,8 @@ static int dt2815_attach(struct comedi_device *dev, str= uct comedi_devconfig *it) const struct comedi_lrange *current_range_type, *voltage_range_type; 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