[PATCH 5/7] evdev_read: report -EINVAL when buffer is to small

[Dmitry Torokhov <dtor_core@ameritech.net>]

===================================================================


ChangeSet@1.1989, 2004-11-12 00:36:10-05:00, dtor_core@ameritech.net
  Input: evdev - return -EINVAL from evdev_read if read buffer
         is too small.
  
         Based on the patch by James Lamanna.
  
  Signed-off-by: Dmitry Torokhov <dtor@mail.ru>


 evdev.c |    3 +++
 1 files changed, 3 insertions(+)


===================================================================



diff -Nru a/drivers/input/evdev.c b/drivers/input/evdev.c
--- a/drivers/input/evdev.c	2004-11-12 01:01:02 -05:00
+++ b/drivers/input/evdev.c	2004-11-12 01:01:02 -05:00
@@ -169,6 +169,9 @@
 	struct evdev_list *list = file->private_data;
 	int retval;
 
+	if (count < sizeof(struct input_event))
+		return -EINVAL;
+
 	if (list->head == list->tail && list->evdev->exist && (file->f_flags & O_NONBLOCK))
 		return -EAGAIN;