From: Ian Abbott Date: Fri, 30 Jan 2026 16:47:29 +0000 (+0000) Subject: comedi: aio_aio12_8: Add sanity checks for I/O base address X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=254ae67d39ab49945aa1ce0a711a499f63965a2c;p=thirdparty%2Fkernel%2Flinux.git comedi: aio_aio12_8: Add sanity checks for I/O base address The "aio_aio12_8" driver uses an admin-supplied configuration option (`it->options[0]`) to configure the I/O port base address of a supported board (AIO12-8, AI12-8, or AO12-4). It currently allows any base address to be configured but the hardware only supports base addresses (set by on-board jumpers) in the range 0x100 to 0x3C0 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/20260130170416.49994-5-abbotti@mev.co.uk Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/comedi/drivers/aio_aio12_8.c b/drivers/comedi/drivers/aio_aio12_8.c index 227a86a3a760..1d9e14981928 100644 --- a/drivers/comedi/drivers/aio_aio12_8.c +++ b/drivers/comedi/drivers/aio_aio12_8.c @@ -202,7 +202,8 @@ static int aio_aio12_8_attach(struct comedi_device *dev, 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, + 0x100, 0x3ff, 32); if (ret) return ret;