Prevent discard requests from going beyond the disk size (to be squashed)

Robert Breker · Robert Breker · commit ef8c4423d8fa · 2015-10-07T16:52:59.000Z
Signed-off-by: Robert Breker &lt;robert.breker@citrix.com&gt;
diff --git a/drivers/tapdisk-image.c b/drivers/tapdisk-image.c
@@ -143,6 +143,7 @@ tapdisk_image_check_request(td_image_t *image, td_vbd_request_t *vreq)
 
 	switch (vreq->op) {
 	case TD_OP_DISCARD:
+                secs = vreq->discard_nr_sectors;
 		/* fall through */
 	case TD_OP_WRITE:
 		if (rdonly) {
