misc userio: Buffer overflowed, userio client isn't keeping up ================================================================== BUG: KMSAN: uninit-value in synaptics_detect+0x207/0x2c0 drivers/input/mouse/synaptics.c:112 CPU: 1 PID: 6363 Comm: kworker/1:3 Not tainted 4.19.0-rc8+ #70 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_long serio_handle_event Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x306/0x460 lib/dump_stack.c:113 kmsan_report+0x1a2/0x2e0 mm/kmsan/kmsan.c:917 __msan_warning+0x7c/0xe0 mm/kmsan/kmsan_instr.c:500 synaptics_detect+0x207/0x2c0 drivers/input/mouse/synaptics.c:112 psmouse_do_detect drivers/input/mouse/psmouse-base.c:1011 [inline] psmouse_extensions+0x1110/0x3850 drivers/input/mouse/psmouse-base.c:1106 psmouse_switch_protocol+0x184/0xd90 drivers/input/mouse/psmouse-base.c:1544 psmouse_connect+0x13ce/0x2300 drivers/input/mouse/psmouse-base.c:1634 serio_connect_driver drivers/input/serio/serio.c:59 [inline] serio_driver_probe+0xe3/0x150 drivers/input/serio/serio.c:790 really_probe+0x95f/0x13d0 drivers/base/dd.c:500 driver_probe_device+0x1b4/0x4f0 drivers/base/dd.c:662 __device_attach_driver+0x632/0x750 drivers/base/dd.c:758 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:461 __device_attach+0x447/0x6e0 drivers/base/dd.c:815 device_initial_probe+0x4a/0x60 drivers/base/dd.c:862 bus_probe_device+0x137/0x390 drivers/base/bus.c:521 device_add+0x2715/0x2d20 drivers/base/core.c:1927 serio_add_port drivers/input/serio/serio.c:554 [inline] serio_handle_event+0x1d90/0x2700 drivers/input/serio/serio.c:222 process_one_work+0x19c4/0x24f0 kernel/workqueue.c:2153 worker_thread+0x206d/0x2b30 kernel/workqueue.c:2296 kthread+0x59c/0x5d0 kernel/kthread.c:247 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:416 Local variable description: ----param@synaptics_detect Variable was created at: synaptics_detect+0x5d/0x2c0 drivers/input/mouse/synaptics.c:100 psmouse_do_detect drivers/input/mouse/psmouse-base.c:1011 [inline] psmouse_extensions+0x1110/0x3850 drivers/input/mouse/psmouse-base.c:1106 ==================================================================