From: Ian Abbott Date: Fri, 30 Jan 2026 16:47:46 +0000 (+0000) Subject: comedi: dt2814: Add sanity checks for I/O base address X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=576067b4c05c3f5470a35be2414f2b421042df3c;p=thirdparty%2Fkernel%2Flinux.git comedi: dt2814: Add sanity checks for I/O base address The "dt2814" driver uses an admin-supplied configuration option (`it->options[0]`) to configure the I/O port base address of a DT2814 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 Link: https://patch.msgid.link/20260130170416.49994-22-abbotti@mev.co.uk Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/comedi/drivers/dt2814.c b/drivers/comedi/drivers/dt2814.c index c98a5a4a7aec..caec16482afb 100644 --- a/drivers/comedi/drivers/dt2814.c +++ b/drivers/comedi/drivers/dt2814.c @@ -305,7 +305,8 @@ static int dt2814_attach(struct comedi_device *dev, struct comedi_devconfig *it) struct comedi_subdevice *s; int ret; - ret = comedi_request_region(dev, it->options[0], 0x2); + ret = comedi_check_request_region(dev, it->options[0], 0x2, + 0x200, 0x3ff, 2); if (ret) return ret;