On Tue, 18 Jan 2022, Jason Gerecke wrote: > If we ever see a touch report with contact count data we initialize > several variables used to read the contact count in the pre-report > phase. These variables are never reset if we process a report which > doesn't contain a contact count, however. This can cause the pre- > report function to trigger a read of arbitrary memory (e.g. NULL > if we're lucky) and potentially crash the driver. > > This commit restores resetting of the variables back to default > "none" values that were used prior to the commit mentioned > below. > > Link: https://github.com/linuxwacom/input-wacom/issues/276 > Fixes: 003f50ab673c (HID: wacom: Update last_slot_field during pre_report phase) > CC: stable@xxxxxxxxxxxxxxx > Signed-off-by: Jason Gerecke <jason.gerecke@xxxxxxxxx> > Reviewed-by: Ping Cheng <ping.cheng@xxxxxxxxx> Applied, thank you. -- Jiri Kosina SUSE Labs
