Drivers: hv: check vmbus_device_create() return value in vmbus_process_offer()
vmbus_device_create() result is not being checked in vmbus_process_offer() and
it can fail if kzalloc() fails. Add the check and do minor cleanup to avoid
additional duplication of "free_channel(); return;" block.
Reported-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index 1d7df25..704c0e0 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -341,11 +341,10 @@
if (channel->sc_creation_callback != NULL)
channel->sc_creation_callback(newchannel);
- return;
+ goto out;
}
- free_channel(newchannel);
- return;
+ goto err_free_chan;
}
/*
@@ -364,6 +363,8 @@
&newchannel->offermsg.offer.if_type,
&newchannel->offermsg.offer.if_instance,
newchannel);
+ if (!newchannel->device_obj)
+ goto err_free_chan;
/*
* Add the new device to the bus. This will kick off device-driver
@@ -379,9 +380,12 @@
list_del(&newchannel->listentry);
spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags);
kfree(newchannel->device_obj);
-
- free_channel(newchannel);
+ goto err_free_chan;
}
+out:
+ return;
+err_free_chan:
+ free_channel(newchannel);
}
enum {
