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Drivers: hv: check vmbus_device_create() return value in vmbus_process_offer()

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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 <[email protected]>
Signed-off-by: Vitaly Kuznetsov <[email protected]>
Signed-off-by: K. Y. Srinivasan <[email protected]>
Acked-by: Jason Wang <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Vitaly Kuznetsov 2015-01-20 16:45:04 +01:00 • committed by Greg Kroah-Hartman
commit 9c3a6f7e47
1 changed files with 9 additions and 5 deletions
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14
drivers/hv/channel_mgmt.c
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@ -341,11 +341,10 @@ static void vmbus_process_offer(struct work_struct *work)
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 @@ static void vmbus_process_offer(struct work_struct *work)
&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 @@ static void vmbus_process_offer(struct work_struct *work)
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 {