usb: fix use after free

Found by: Coverity scan.
CID: 96704

diff --git a/grub-core/bus/usb/usbtrans.c b/grub-core/bus/usb/usbtrans.c
index b614997f2bcdfbb914600a8fe10a69168a860c4b..ee86808533cce0d4eb3af2da5b5845b4cb7eddab 100644 (file)
--- a/grub-core/bus/usb/usbtrans.c
+++ b/grub-core/bus/usb/usbtrans.c
@@ -311,8 +311,8 @@ grub_usb_bulk_finish_readwrite (grub_usb_transfer_t transfer)
                 transfer->size + 1);
 
   grub_free (transfer->transactions);
-  grub_free (transfer);
   grub_dma_free (transfer->data_chunk);
+  grub_free (transfer);
 }
 
 static grub_usb_err_t