From: Ian Abbott Date: Fri, 30 Jan 2026 16:48:07 +0000 (+0000) Subject: comedi: pcmmio: Add sanity checks for I/O base address X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=78ba300a999179d79f4b8f479e58345c05e17baa;p=thirdparty%2Fkernel%2Flinux.git comedi: pcmmio: Add sanity checks for I/O base address The "pcmmio" driver uses an admin-supplied configuration option (`it->options[0]`) to configure the I/O port base address of a PCM-MIO 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 0xFFE0 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 Link: https://patch.msgid.link/20260130170416.49994-43-abbotti@mev.co.uk Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/comedi/drivers/pcmmio.c b/drivers/comedi/drivers/pcmmio.c index c2402239d551..d38202c8a12b 100644 --- a/drivers/comedi/drivers/pcmmio.c +++ b/drivers/comedi/drivers/pcmmio.c @@ -667,7 +667,8 @@ static int pcmmio_attach(struct comedi_device *dev, struct comedi_devconfig *it) struct comedi_subdevice *s; int ret; - ret = comedi_request_region(dev, it->options[0], 32); + ret = comedi_check_request_region(dev, it->options[0], 32, + 0, 0xffff, 32); if (ret) return ret;