un-register kbd driver in case of USB kbd unplug.

If a USB keyboard is unplugged, the keyboard eventhandler is never
removed, and events will continue to be passed through to the device,
causing crashes or memory corruption.

Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/input.c b/input.c
index 651442d793..ec05548f7a 100644
--- a/input.c
+++ b/input.c
@@ -42,6 +42,12 @@ void qemu_add_kbd_event_handler(QEMUPutKBDEvent *func, void *opaque)
     qemu_put_kbd_event = func;
 }
 
+void qemu_remove_kbd_event_handler(void)
+{
+    qemu_put_kbd_event_opaque = NULL;
+    qemu_put_kbd_event = NULL;
+}
+
 static void check_mode_change(void)
 {
     static int current_is_absolute, current_has_absolute;