[PATCH] IB/ipath: disallow send of invalid packet sizes over UD

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Bryan O'Sullivan <bryan.osullivan@qlogic.com>
Cc: "Michael S. Tsirkin" <mst@mellanox.co.il>
Cc: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/ipath/ipath_ud.c b/drivers/infiniband/hw/ipath/ipath_ud.c
index eeff19800db7..3b6d00b9b8be 100644
--- a/drivers/infiniband/hw/ipath/ipath_ud.c
+++ b/drivers/infiniband/hw/ipath/ipath_ud.c
@@ -275,6 +275,11 @@ int ipath_post_ud_send(struct ipath_qp *qp, struct ib_send_wr *wr)
                 len += wr->sg_list[i].length;
                 ss.num_sge++;
         }
+        /* Check for invalid packet size. */
+        if (len > ipath_layer_get_ibmtu(dev->dd)) {
+                ret = -EINVAL;
+                goto bail;
+        }
         extra_bytes = (4 - len) & 3;
         nwords = (len + extra_bytes) >> 2;