The parameter "handler" is not checked, which may cause system crash on some broken devices.
Signed-off-by: Zhenhua <[email protected]> --- drivers/tty/vt/keyboard.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/tty/vt/keyboard.c b/drivers/tty/vt/keyboard.c index f4166263bb3a..f85c2d8c0b36 100644 --- a/drivers/tty/vt/keyboard.c +++ b/drivers/tty/vt/keyboard.c @@ -1455,6 +1455,12 @@ static void kbd_event(struct input_handle *handle, unsigned int event_type, unsigned int event_code, int value) { /* We are called with interrupts disabled, just take the lock */ + + if (handle == NULL || handle->dev == NULL) { + pr_err("device handler error."); + return; + } + spin_lock(&kbd_event_lock); if (event_type == EV_MSC && event_code == MSC_RAW && HW_RAW(handle->dev)) -- 2.14.1
