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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>
This commit is contained in:
Krishna Kumar 2006-11-09 09:30:41 +05:30 committed by Roland Dreier
parent 33ba0fa9f3
commit 83b9658623
1 changed files with 4 additions and 3 deletions
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7
drivers/infiniband/core/iwcm.c
View File

@ -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);
}