Seth Forshee 0704fea9b2 HID: i2c-hid: Limit reads to wMaxInputLength bytes for input events ... commit 6d00f37e49 upstream. d1c7e29e8d (HID: i2c-hid: prevent buffer overflow in early IRQ) changed hid_get_input() to read ihid->bufsize bytes, which can be more than wMaxInputLength. This is the case with the Dell XPS 13 9343, and it is causing events to be missed. In some cases the missed events are releases, which can cause the cursor to jump or freeze, among other problems. Limit the number of bytes read to min(wMaxInputLength, ihid->bufsize) to prevent such problems. Fixes: d1c7e29e8d "HID: i2c-hid: prevent buffer overflow in early IRQ" Signed-off-by: Seth Forshee <seth.forshee@canonical.com> Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2015-03-06 14:43:23 -08:00
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Kconfig	HID: i2c-hid: enhance Kconfig	2012-12-05 10:55:03 +01:00
Makefile	HID: i2c-hid: introduce HID over i2c specification implementation	2012-11-19 11:04:38 +01:00
i2c-hid.c	HID: i2c-hid: Limit reads to wMaxInputLength bytes for input events	2015-03-06 14:43:23 -08:00