net/smc: fix a NULL pointer dereference

In case alloc_ordered_workqueue fails, the fix returns NULL
to avoid NULL pointer dereference.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/smc/smc_ism.c b/net/smc/smc_ism.c
index 2fff79d..e89e918 100644 (file)
--- a/net/smc/smc_ism.c
+++ b/net/smc/smc_ism.c
@@ -289,6 +289,11 @@ struct smcd_dev *smcd_alloc_dev(struct device *parent, const char *name,
        INIT_LIST_HEAD(&smcd->vlan);
        smcd->event_wq = alloc_ordered_workqueue("ism_evt_wq-%s)",
                                                 WQ_MEM_RECLAIM, name);
+       if (!smcd->event_wq) {
+               kfree(smcd->conn);
+               kfree(smcd);
+               return NULL;
+       }
        return smcd;
 }
 EXPORT_SYMBOL_GPL(smcd_alloc_dev);