1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/input/misc/uinput.c b/drivers/input/misc/uinput.c
index 1b4ee4a5c49c..e74ed9cc6371 100644
--- a/drivers/input/misc/uinput.c
+++ b/drivers/input/misc/uinput.c
@@ -476,6 +476,9 @@ static ssize_t uinput_read(struct file *file, char __user *buffer, size_t count,
         struct input_event event;
         int retval = 0;
 
+        if (count != 0 && count < input_event_size())
+                return -EINVAL;
+
         if (udev->state != UIST_CREATED)
                 return -ENODEV;