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authorKrishna Kumar <krkumar2@in.ibm.com>2006-11-09 09:30:41 +0530
committerRoland Dreier <rolandd@cisco.com>2006-11-29 15:33:07 -0800
commit83b96586239bf6c719ff640341e1cf83e4a7c046 (patch)
treefafbfdbc713e45e2972c27795444af3d62db39c5
parent33ba0fa9f315ce32fbb86fa671c131f5355b52a1 (diff)
RDMA/iwcm: Fix memory leak
If we get IW_CM_EVENT_CONNECT_REQUEST message and encounter an error (not in the LISTEN state, cannot create an id, cannot alloc work_entry, etc), then the memory allocated by cm_event_handler() in the event->private_data gets leaked. Since cm_work_handler has already put the event on the work_free_list, this allocated memory is leaked. High backlog value can allow DoS attacks. Signed-off-by: Krishna Kumar <krkumar2@in.ibm.com> Acked-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
-rw-r--r--drivers/infiniband/core/iwcm.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/infiniband/core/iwcm.c b/drivers/infiniband/core/iwcm.c
index 22d498c9a68..0cfd7848dd3 100644
--- a/drivers/infiniband/core/iwcm.c
+++ b/drivers/infiniband/core/iwcm.c
@@ -619,7 +619,7 @@ static void cm_conn_req_handler(struct iwcm_id_private *listen_id_priv,
spin_lock_irqsave(&listen_id_priv->lock, flags);
if (listen_id_priv->state != IW_CM_STATE_LISTEN) {
spin_unlock_irqrestore(&listen_id_priv->lock, flags);
- return;
+ goto out;
}
spin_unlock_irqrestore(&listen_id_priv->lock, flags);
@@ -628,7 +628,7 @@ static void cm_conn_req_handler(struct iwcm_id_private *listen_id_priv,
listen_id_priv->id.context);
/* If the cm_id could not be created, ignore the request */
if (IS_ERR(cm_id))
- return;
+ goto out;
cm_id->provider_data = iw_event->provider_data;
cm_id->local_addr = iw_event->local_addr;
@@ -641,7 +641,7 @@ static void cm_conn_req_handler(struct iwcm_id_private *listen_id_priv,
if (ret) {
iw_cm_reject(cm_id, NULL, 0);
iw_destroy_cm_id(cm_id);
- return;
+ goto out;
}
/* Call the client CM handler */
@@ -653,6 +653,7 @@ static void cm_conn_req_handler(struct iwcm_id_private *listen_id_priv,
kfree(cm_id);
}
+out:
if (iw_event->private_data_len)
kfree(iw_event->private_data);
}