Messages in this thread Patch in this message | | | Date | Mon, 30 Jan 2006 11:24:35 -0500 | From | Ben Collins <> | Subject | [PATCH 2.6.15/2.6.16-git] Fix off-by-one for num_values in uref_multi requests |
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Found this when working with a HAPP UGCI device. It has a usage with 7 indexes. I could read them all one at a time, but using a multiref it would only allow me to read the first 6. The patch below fixed it.
Signed-off-by: Ben Collins <bcollins@ubuntu.com>
--- a/drivers/usb/input/hiddev.c +++ b/drivers/usb/input/hiddev.c @@ -632,7 +632,7 @@ static int hiddev_ioctl(struct inode *in else if ((cmd == HIDIOCGUSAGES || cmd == HIDIOCSUSAGES) && (uref_multi->num_values > HID_MAX_MULTI_USAGES || - uref->usage_index + uref_multi->num_values >= field->report_count)) + uref->usage_index + uref_multi->num_values > field->report_count)) goto inval; } -- Ben Collins Kernel Developer - Ubuntu Linux
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