https://github.com/torvalds/linux
Revision a2288d4e355992d369c50c45d017a85f6061ff71 authored by Igor Druzhinin on 28 February 2019, 14:11:26 UTC, committed by David S. Miller on 28 February 2019, 20:50:37 UTC
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@citrix.com>
Reviewed-by: Paul Durrant <paul.durrant@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent 99e87f5
History
Tip revision: a2288d4e355992d369c50c45d017a85f6061ff71 authored by Igor Druzhinin on 28 February 2019, 14:11:26 UTC
xen-netback: don't populate the hash cache on XenBus disconnect
Tip revision: a2288d4
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