Re: [PATCH] xen-netback: don't populate the hash cache on XenBus disconnect

[David Miller]

From: Igor Druzhinin <igor.druzhinin@xxxxxxxxxx>
Date: Thu, 28 Feb 2019 14:11:26 +0000

> Occasionally, during the disconnection procedure on XenBus which
> includes hash cache deinitialization there might be some packets
> still in-flight on other processors. Handling of these packets includes
> hashing and hash cache population that finally results in hash cache
> data structure corruption.
> 
> In order to avoid this we prevent hashing of those packets if there
> are no queues initialized. In that case RCU protection of queues guards
> the hash cache as well.
> 
> Signed-off-by: Igor Druzhinin <igor.druzhinin@xxxxxxxxxx>

Applied and queued up for -stable, thanks.