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Message-ID: <20260130170416.49994-29-abbotti@mev.co.uk> Date: Fri, 30 Jan 2026 16:47:53 +0000 From: Ian Abbott <abbotti@....co.uk> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Ian Abbott <abbotti@....co.uk>, H Hartley Sweeten <hsweeten@...ionengravers.com> Subject: [PATCH 28/46] comedi: ni_at_ao: Add sanity checks for I/O base address The "ni_at_ao" driver uses an admin-supplied configuration option (`it->options[0]`) to configure the I/O port base address of an AT-AO-6 or AT-AO-10 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 0 to 0x3E0 on 32-byte boundaries. Add a sanity check to ensure the device is not configured at an unsupported base address. Signed-off-by: Ian Abbott <abbotti@....co.uk> --- drivers/comedi/drivers/ni_at_ao.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/comedi/drivers/ni_at_ao.c b/drivers/comedi/drivers/ni_at_ao.c index 9cf6b4ff6b65..31fd64bf8206 100644 --- a/drivers/comedi/drivers/ni_at_ao.c +++ b/drivers/comedi/drivers/ni_at_ao.c @@ -295,7 +295,8 @@ static int atao_attach(struct comedi_device *dev, struct comedi_devconfig *it) struct comedi_subdevice *s; int ret; - ret = comedi_request_region(dev, it->options[0], 0x20); + ret = comedi_check_request_region(dev, it->options[0], 0x20, + 0, 0x3ff, 32); if (ret) return ret; -- 2.51.0
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