Nikita Zhandarovich 954bd5a44b HID: wacom: avoid integer overflow in wacom_intuos_inout()
commit bd249b91977b768ea02bf84d04625d2690ad2b98 upstream.

If high bit is set to 1 in ((data[3] & 0x0f << 28), after all arithmetic
operations and integer promotions are done, high bits in
wacom->serial[idx] will be filled with 1s as well.
Avoid this, albeit unlikely, issue by specifying left operand's __u64
type for the right operand.

Found by Linux Verification Center (linuxtesting.org) with static
analysis tool SVACE.

Fixes: 3bea733ab212 ("USB: wacom tablet driver reorganization")
Signed-off-by: Nikita Zhandarovich <n.zhandarovich@fintech.ru>
Reviewed-by: Ping Cheng <ping.cheng@wacom.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-06-09 10:30:13 +02:00
..
2023-06-09 10:30:13 +02:00
2020-09-30 22:44:26 +02:00