V4L/DVB (12369): stv680: kfree called before usb_kill_urb

The irq handler will touch memory. Even in the error case some URBs may
complete. Thus no memory must be kfreed before all URBs are killed.

Signed-off-by: Oliver Neukum <oliver@neukum.org>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 5 insertions, 4 deletions

diff --git a/drivers/media/video/stv680.c b/drivers/media/video/stv680.c
index 8b4e7dafce7b..6a91714125d2 100644
--- a/drivers/media/video/stv680.c
+++ b/drivers/media/video/stv680.c
@@ -734,10 +734,6 @@ static int stv680_start_stream (struct usb_stv *stv680)
         return 0;
 
  nomem_err:
-        for (i = 0; i < STV680_NUMSCRATCH; i++) {
-                kfree(stv680->scratch[i].data);
-                stv680->scratch[i].data = NULL;
-        }
         for (i = 0; i < STV680_NUMSBUF; i++) {
                 usb_kill_urb(stv680->urb[i]);
                 usb_free_urb(stv680->urb[i]);
@@ -745,6 +741,11 @@ static int stv680_start_stream (struct usb_stv *stv680)
                 kfree(stv680->sbuf[i].data);
                 stv680->sbuf[i].data = NULL;
         }
+        /* used in irq, free only as all URBs are dead */
+        for (i = 0; i < STV680_NUMSCRATCH; i++) {
+                kfree(stv680->scratch[i].data);
+                stv680->scratch[i].data = NULL;
+        }
         return -ENOMEM;
 
 }