Input: synaptics - avoid using uninitialized variable when probing
authorDmitry Torokhov <dmitry.torokhov@gmail.com>
Wed, 17 Oct 2018 00:07:35 +0000 (17:07 -0700)
committerDmitry Torokhov <dmitry.torokhov@gmail.com>
Fri, 19 Oct 2018 17:40:12 +0000 (10:40 -0700)
commitf39f8688888ae74fa8deae2d01289b69b4727394
tree845038a024908852df633f70f6f0cc1d04ece2f9
parent9023705192242a77f05c1647b9f0c6b55c955ecf
Input: synaptics - avoid using uninitialized variable when probing

synaptics_detect() does not check whether sending commands to the
device succeeds and instead relies on getting unique data from the
device. Let's make sure we seed entire buffer with zeroes to make sure
we will not use garbage on stack that just happen to be 0x47.

Reported-by: syzbot+13cb3b01d0784e4ffc3f@syzkaller.appspotmail.com
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
drivers/input/mouse/synaptics.c