RDMA/cxgb4: Drop peer_abort when no endpoint found

BugLink: http://bugs.launchpad.net/bugs/1008697

commit 14b9222808bb8bfefc71f72bc0dbdcf3b2f0140f upstream.

Log a warning and drop the abort message.  Otherwise we will do a
bogus wake_up() and crash.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c
index daa93e942e1..267005d0e66 100644
--- a/drivers/infiniband/hw/cxgb4/cm.c
+++ b/drivers/infiniband/hw/cxgb4/cm.c
@@ -2316,6 +2316,12 @@ static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb)
         unsigned int tid = GET_TID(req);
 
         ep = lookup_tid(t, tid);
+        if (!ep) {
+                printk(KERN_WARNING MOD
+                       "Abort on non-existent endpoint, tid %d\n", tid);
+                kfree_skb(skb);
+                return 0;
+        }
         if (is_neg_adv_abort(req->status)) {
                 PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
                      ep->hwtid);