usb: wusbcore: set pointers to NULL after freeing in error cases

This patch fixes two cases where error handling code was freeing memory
but not setting the pointer to NULL.  This could lead to a double free
in the HWA shutdown code.

Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/usb/wusbcore/wa-xfer.c b/drivers/usb/wusbcore/wa-xfer.c
index 61b0597c399b..0b27146b5bc1 100644
--- a/drivers/usb/wusbcore/wa-xfer.c
+++ b/drivers/usb/wusbcore/wa-xfer.c
@@ -1560,6 +1560,7 @@ error_submit_buf_in:
                         xfer, seg_idx, result);
         seg->result = result;
         kfree(wa->buf_in_urb->sg);
+        wa->buf_in_urb->sg = NULL;
 error_sg_alloc:
         __wa_xfer_abort(xfer);
 error_complete:
@@ -1859,6 +1860,7 @@ out:
 
 error_dti_urb_submit:
         usb_put_urb(wa->buf_in_urb);
+        wa->buf_in_urb = NULL;
 error_buf_in_urb_alloc:
         usb_put_urb(wa->dti_urb);
         wa->dti_urb = NULL;