crosvm: Ensure slices are the same size when copying.

Bug=b/135190799
TEST=run cuttlefish in debian host

Change-Id: I7f9343dd202da2a163b3e8aeb8fbde5eb4cfb1d3
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1659144
Reviewed-by: Dylan Reid <dgreid@chromium.org>
Reviewed-by: Cody Schuffelen <schuffelen@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Auto-Submit: Jorge Moreira Broche <jemoreira@google.com>
Commit-Queue: Dylan Reid <dgreid@chromium.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/devices/src/virtio/input/event_source.rs b/devices/src/virtio/input/event_source.rs
index a92dc83..9a75a5d 100644
--- a/devices/src/virtio/input/event_source.rs
+++ b/devices/src/virtio/input/event_source.rs
@@ -178,7 +178,7 @@ where
             // otherwise source and destination would be the same.
             if buff_size != remainder {
                 let (des, src) = self.read_buffer.buffer.split_at_mut(buff_size - remainder);
-                des[..remainder].copy_from_slice(src);
+                des[..remainder].copy_from_slice(&src[..remainder]);
             }
         }
         self.read_idx = remainder;